| Dimension Variable | Description |
|---|---|
| MT | Number of shots |
| AV | Number of average waveform groups |
| Group: / | |||||||
| l0_to_l1a_githash | (Attribute) | Git commit hash of the l0_to_l1a software used to create the L1A file | |||||
| l0_to_l1a_version | (Attribute) | Version number of the l0_to_l1a software used to create the L1A file | |||||
| short_name | (Attribute) | GEDI_L1A | ${DESCRIPTION} | ||||
| Group: /METADATA/DatasetIdentification | |||||||
| abstract | (Attribute) | The GEDI L1A and L1B standard data product contains precise latitude, longitude, and height above the reference ellipsoid of the laser shot received bounce point for all laser shots. Geophysical corrections are applied to the surface return values for each laser shot. Geophysical corrections, atmospheric corrections, and the surface types are provided for each laser shot. | ${DESCRIPTION} | ||||
| characterSet | (Attribute) | utf8 | ${DESCRIPTION} | ||||
| creationDate | (Attribute) | File creation date | |||||
| credit | (Attribute) | The software that generates the L1A product was designed and implemented within the GEDI Science Data Processing System at the NASA Goddard Space Flight Center in Greenbelt, Maryland. | ${DESCRIPTION} | ||||
| fileName | (Attribute) | Original file name | |||||
| language | (Attribute) | eng | ${DESCRIPTION} | ||||
| originatorOrganizationName | (Attribute) | GSFC GEDI-SDPS > GEDI Science Data Processing System | ${DESCRIPTION} | ||||
| PGEVersion | (Attribute) | Production software version ID | |||||
| purpose | (Attribute) | The purpose of the L1A dataset is to provide all of the instrument information for each laser shot for all eight GEDI beams. This includes all instrument parameters, ranging parameters, waveforms, geolocation parameters, and geophysical corrections. | ${DESCRIPTION} | ||||
| shortName | (Attribute) | GEDI_L1A | ${DESCRIPTION} | ||||
| spatialRepresentationType | (Attribute) | along-track | ${DESCRIPTION} | ||||
| status | (Attribute) | onGoing | ${DESCRIPTION} | ||||
| topicCategory | (Attribute) | geoscientificInformation | ${DESCRIPTION} | ||||
| uuid | (Attribute) | Universally unique identifier (UUID) for this file | |||||
| VersionID | (Attribute) | Release data product version ID | |||||
| Group: /BEAMXXXX | |||||||
| description | (Attribute) | "Coverage beam" or "Full power beam" | |||||
| Label | Datatype (Dimensions) |
long_name | units source |
description | |||
| all_samples_sum | UINT32 (MT) |
All samples sum | counts from the ADC (Analog-to-Digital Converter) L0B |
Sum of all values within the 10 km range window. | delta_time | ||
| bdu | UINT16 (MT) |
Beam dithering unit | N/A L0B |
Beam dithering unit code | delta_time | ||
| beam | UINT16 (MT) |
Beam | counter Derived |
Beam number (0-15). | delta_time | ||
| channel | UINT8 (MT) |
Channel | counter L0B |
Channel number (0-7). | delta_time | ||
| dithered | UINT8 (MT) |
Dithered | boolean L0B |
Set to 1 if the shot is dithered, 0 otherwise. | delta_time | ||
| framesync | UINT32 (MT) |
Framesync | 2e-7 seconds L0B |
Oven controlled oscillator (OCXO) framesync offset count from Global Positioning System (GPS) Pulse Per Second (PPS). | |||
| gps_framesync | UINT32 (MT) |
GPS framesync | 2e-7 seconds L0B |
GPS framesync offset count from GPS PPS. | |||
| gps_time | UINT32 (MT) |
GPS time | seconds since 1980-01-06T00:00:00Z L0B |
GPS time, integer part. | |||
| is_crc_valid | UINT8 (MT) |
Is CRC valid | boolean Derived |
Set to 1 if the CRC matches the packet, 0 otherwise. | delta_time | ||
| iss_fraction | UINT16 (MT) |
ISS fraction | N/A L0B |
Middle 16 bits of the 48 bit long time value broadcast by the ISS. | |||
| iss_framesync | UINT32 (MT) |
ISS framesync | 2e-7 seconds L0B |
International Space Station (ISS) framesync offset count from GPS PPS. | |||
| iss_time | UINT32 (MT) |
ISS integer time | seconds since 1980-01-06T00:00:00Z L0B |
International Space Station (ISS) clock integer time. | |||
| master_frac | FLOAT64 (MT) |
Master time fractional seconds | seconds Derived |
Master time, fractional part. master_int+master_frac is equivalent to /BEAMXXXX/geolocation/delta_time and /BEAMXXXX/geophys_corr/delta_time. | |||
| master_int | UINT32 (MT) |
Master time integer seconds | seconds Derived |
Master time, integer part. Seconds since master_time_epoch. master_int+master_frac is equivalent to /BEAMXXXX/geolocation/delta_time and /BEAMXXXX/geophys_corr/delta_time. | |||
| master_source | UINT8 (MT) |
Master time source | flag Derived |
The source for each master time. 0=None, 1=GPS, 2=OCXO, 3=ISS. | delta_time | ||
| minor_frame_number | UINT16 (MT) |
Minor frame number | counter L0B |
Minor frame number (0-241). | delta_time | ||
| noise_mean | FLOAT32 (MT) |
Noise mean | counts from the ADC L0B |
Noise mean. | delta_time | ||
| noise_std_dev | UINT16 (MT) |
Noise standard deviation | counts from the ADC L0B |
Noise standard deviation, rounded integer. | delta_time | ||
| override | UINT8 (MT) |
Override | boolean L0B |
1 if threshold override is on. | delta_time | ||
| packet_count | UINT32 (MT) |
Packet count | counter L0B |
Packet count since last FPGA load. | delta_time | ||
| packet_length | UINT16 (MT) |
Packet length | bytes L0B |
Valid packet byte count. | delta_time | ||
| pers_coarse | UINT8 (MT) |
Persistance coarse | boolean L0B |
Persistance coarse, 1 if single. | delta_time | ||
| pers_fine | UINT8 (MT) |
Persistance fine | boolean L0B |
Persistance fine, 1 if single. | delta_time | ||
| rx_offset | UINT16 (MT) |
RX offset | sample intervals (~1 ns) L0B |
Time interval from first stored sample to first downloaded RX sample (1ns resolution). | delta_time | ||
| rx_open | UINT32 (MT) |
RX open | sample intervals (~1 ns) L0B |
Time interval from t0 to first stored RX sample (4ns resolution). | delta_time | ||
| rx_sample | UINT8 (MT) |
RX sample | flag L0B |
If set to 1, the RX waveform is suppressed. | delta_time | ||
| rx_sample_count | UINT16 (MT) |
RX sample count | sample intervals L0B |
The number of sample intervals (elements) in each RX waveform. | delta_time | ||
| rx_sample_start_index | UINT64 (MT) |
RX sample start index | index (origin 1) Derived |
The index in the rxwaveform dataset of the first element of each RX waveform. The indices start at 1. | delta_time | ||
| rx_sample_sum | UINT32 (MT) |
RX sample sum | counts from the ADC L0B |
Sum of RX values in RX waveform. | delta_time | ||
| rxwaveform | UINT16 (UNLIMITED) |
RX waveform | counts from the ADC L0B |
The receive (RX) waveforms. Use rx_sample_count and rx_sample_start_index to identify the location of each waveform. | |||
| selection_stretchers_x | UINT16 (MT) |
Selection stretchers X | sample intervals (~1 ns) L0B |
Commanded number of samples added to algo section on the left. | delta_time | ||
| selection_stretchers_y | UINT16 (MT) |
Selection stretchers Y | sample intervals (~1 ns) L0B |
Commanded number of samples added to algo section on the right. | delta_time | ||
| shot_number | UINT64 (MT) |
Shot number | counter Derived |
Unique shot ID. | delta_time | ||
| stale_return_flag | UINT8 (MT) |
Stale return flag | boolean L0B |
Indicates that a "stale" cue point from the coarse search algorithm is being used. | delta_time | ||
| stretchers_x | UINT8 (MT) |
Stretchers X | sample intervals (~1 ns) L0B |
Buffer size added to left of the fine threshold location. | delta_time | ||
| stretchers_y | UINT8 (MT) |
Stretchers Y | sample intervals (~1 ns) L0B |
Buffer size added to the right of the fine threshold location. | delta_time | ||
| sum_of_squares | UINT32 (MT) |
Noise sum of squares | counts from the ADC L0B |
Sum of squares calculated for noise region. | delta_time | ||
| sync | UINT16 (MT) |
Sync word | N/A L0B |
Constant sync word in the L0B file, should always be 0xA5A5. | delta_time | ||
| th_coarse_used | UINT16 (MT) |
Threshold coarse used | counts L0B |
Count values for coarse threshold. Once a pulse has been detected, then window for fine threshold search is set. Two consecutive points at or above this value indicates pulse detection. | delta_time | ||
| th_left_used | UINT16 (MT) |
Threshold fine left used | counts from the ADC L0B |
Count values for left threshold used in fine search. Two consecutive points at or above this value indicates pulse detection. | delta_time | ||
| th_mult_coarse | FLOAT32 (MT) |
Threshold multiplier coarse | N/A L0B |
Multiplier used to determine threshold coarse used. | delta_time | ||
| th_mult_left | FLOAT32 (MT) |
Threshold multiplier fine left | N/A L0B |
Multiplier used to determine threshold fine left used. | delta_time | ||
| th_mult_right | FLOAT32 (MT) |
Threshold multiplier fine right | N/A L0B |
Multiplier used to determine threshold right left used. | delta_time | ||
| th_right_used | UINT16 (MT) |
Threshold fine right used | counts from the ADC L0B |
Count value for right threshold used in fine search. Two consecutive points at or above this value indicates pulse detection. | delta_time | ||
| tx_offset | UINT16 (MT) |
TX offset | sample intervals (~1 ns) L0B |
Time interval from first stored sample to first downloaded TX sample (1ns resolution). | delta_time | ||
| tx_open | UINT32 (MT) |
TX open | sample intervals (~1 ns) L0B |
Time interval from t0 to first stored TX sample (4ns resolution) | delta_time | ||
| tx_sample_count | UINT16 (MT) |
TX sample count | sample intervals Derived |
The number of sample intervals (elements) in each TX waveform. | delta_time | ||
| tx_sample_info | UINT8 (MT) |
TX sample info | flag L0B |
Flag indicating the value of tx_sample_count. 1:64, 2:80, 4:96, 8:112, else:128 | delta_time | ||
| tx_sample_start_index | UINT64 (MT) |
TX sample start index | index (origin 1) Derived |
The index in the rxwaveform dataset of the first element of each RX waveform. The indices start at 1. | delta_time | ||
| tx_sample_sum | UINT32 (MT) |
TX sample sum | counts from the ADC L0B |
Sum of TX values in TX waveform. | delta_time | ||
| txwaveform | UINT16 (UNLIMITED) |
TX waveform | counts from the ADC L0B |
The transmit (TX) waveforms. Use tx_sample_count and tx_sample_start_index to identify the location of each waveform. | |||
| Group: /BEAMXXXX/ancillary | |||||||
| Label | Datatype (Dimensions) |
long_name | units source |
description | |||
| master_time_epoch | FLOAT64 (1) |
Master time epoch | seconds |
Number of GPS seconds between the GPS epoch (1980-01-06T00:00:00Z) and the GEDI epoch (2018-01-01T00:00:00Z). Add this value to delta_time parameters to compute full GPS seconds (relative to the GPS epoch) for each data point. | |||
| Group: /BEAMXXXX/CLK | |||||||
| description | (Attribute) | Clock calibration data | ${DESCRIPTION} | ||||
| Program_Version | (Attribute) | Version number of the DU_clk_f_calib software used to create the L1A file. | |||||
| Label | Datatype (Dimensions) |
long_name | units source |
description | |||
| dFF | FLOAT64 (MT) |
dF/F | Hz/Hz Derived from clock housekeeping |
"Instantaneous" change in clock frequency correction, independent of frequency. | delta_time | ||
| fit | FLOAT64 (MT) |
dF/F fit | Hz/Hz Derived |
Linear fit to dF/F. | delta_time | ||
| interp | UINT8 (MT) |
Interpolation flag | boolean Derived |
Flag if dF/F had to be interpolated (no HK CLK data). | delta_time | ||
| range_bin0_m | FLOAT64 (MT) |
Range bin 0 meters | meters Derived |
2-way range for first bin, converted from bins to meters using speed of light (299792458 m/s) and frequency correction. If use_linear_fit=1, fit dataset is used, else dFF dataset is used. | delta_time | ||
| range_lastbin_m | FLOAT64 (MT) |
Range last bin meters | meters Derived |
2-way range for last bin, converted from bins to meters using speed of light (299792458 m/s) and frequency correction. If use_linear_fit=1, fit dataset is used, else dFF dataset is used. | delta_time | ||
| Group: /BEAMXXXX/CLK/ancillary | |||||||
| Label | Datatype (Dimensions) |
long_name | units source |
description | |||
| I_warmup | FLOAT64 (1) |
Current warmup | amps Configuration |
Specified warm-up current. | |||
| calibration_time | UINT8 (1) |
Calibration time | seconds Configuration |
Calibration/integration time of instantaneous dF/F. | |||
| f_nom | FLOAT64 (1) |
Frequency nominal | Hz Derived |
Nominal frequency for ranges. | |||
| f_nom_pll | FLOAT64 (1) |
Frequency nominal PLL | Hz Configuration |
Nominal frequency of PLL. | |||
| f_nom_pll_pecl | FLOAT64 (1) |
Frequency nominal PLL PECL | Hz Configuration |
Nominal frequency of the PLL PECL clock. | |||
| f_nom_slope | FLOAT64 (1) |
Frequency nominal slope | Hz/sec Configuration |
Default change in nominal frequency over time. Used in computing the corrected frequency if use_f_nom is true. | |||
| f_nom_tcxo | FLOAT64 (1) |
Frequency nominal TCXO | Hz Configuration |
Nominal frequency of TXCO. | |||
| fit_bias | FLOAT64 (1) |
Fit bias | seconds Derived |
Linear fit bias used for range calculation (pll, pll_pecl). | |||
| fit_desc | STRING (1) |
Fit description | N/A Derived |
Description of linear fit used for range calculation (pll, pll_pecl). | |||
| fit_edit_multiplier | FLOAT64 (1) |
Fit edit multiplier | N/A Configuration |
Editing multiplier for dF/F fit. | |||
| fit_epoch | FLOAT64 (1) |
Fit epoch | seconds Derived |
Linear fit epoch (master time) used for range calculation. | |||
| fit_max_iter | FLOAT64 (1) |
Fit maximum iterations | iterations Configuration |
Maximum iterations for dF/F fit. | |||
| fit_tolerance | FLOAT64 (1) |
Fit tolerance | percent/100 Configuration |
Maximum fit tolerance as a percentage of standard deviation of the residuals. | |||
| fit_trend | FLOAT64 (1) |
Fit trend | dF/F / sec Derived |
Linear fit trend used for range calculation. | |||
| max_valid_rms | FLOAT64 (1) |
Maximum valid RMS of dF/F fit | Hz/sec Configuration |
Maximum allowed RMS of instrument housekeeping data derived dF/F linear fit. If the final RMS of the linear fit is greater than this value, the configuration specified nominal frequency and slope are used to compute the corrected frequency for computing ranges in meters. | |||
| orbit_bounds | FLOAT64 (2) |
Orbit bounds | seconds Configuration |
Orbit bounds (GPS seconds). | |||
| sig_N | UINT8 (1) |
Sigma N | counter Configuration |
Sigma of the rolling counter, essentially discretization error. | |||
| sig_dT | FLOAT64 (1) |
Sigma dT | seconds Configuration |
Sigma dT, from GPS processing. | |||
| use_f_nom | UINT8 (1) |
Use nominal frequency | boolean Configuration |
If true, use nominal frequency and frequency slope values specified in the configuration file to determine corrected frequency. If false, the corrected frequency is computed using the instrument housekeeping data. | |||
| use_headersecs | UINT8 (1) |
Use CCSDS packet header time | boolean Configuration |
If true, use the CCDS packet header time instead of the GPS time within the instrument housekeeping packets when matching housekeeping observations to science data. | |||
| use_linear_fit | UINT8 (1) |
Use linear fit | boolean Configuration |
Flag to indicate if linear fit is used in calculation of ranges. | |||
| use_master_time | UINT8 (1) |
Use master time | boolean Configuration |
If true, use of master observation time tag to match data to housekeeping observations. If false, GPS observation time tags are used. | |||
| Group: /BEAMXXXX/INST_HK | |||||||
| description | (Attribute) | Instrument housekeeping data. Recorded at 1 second interval on board and repeated to beam frequency. | ${DESCRIPTION} | ||||
| Program_Version | (Attribute) | Version number of the process_L1A_INSTHK software used to create the L1A file. | |||||
| Label | Datatype (Dimensions) |
long_name | units source |
description | |||
| adc_t | FLOAT64 (MT) |
ADC temperature | Degrees Celsius Instrument housekeeping |
ADC temperature diode | delta_time | ||
| adccal | FLOAT64 (MT) |
ADC calibration | microseconds Instrument housekeeping |
Science RT ADC calibration (used everytime DU is power cycled or when termal condition changes). | delta_time | ||
| bgngate_frac | FLOAT64 (MT) |
Background noise gate fraction | 0.1 microseconds Instrument housekeeping |
t-time for start of Background Noise Gate (0-9). | delta_time | ||
| bgngate_usec | FLOAT64 (MT) |
Background noise gate microseconds | microseconds Instrument housekeeping |
t-time for start of Background Noise Gate in microseconds. | delta_time | ||
| dma_det_t | FLOAT64 (MT) |
Detector module #1 detector temperature | Degrees Celsius Instrument housekeeping |
Detector module #1 detector temperature on APD pedestal. | delta_time | ||
| dma_gain_mode | FLOAT64 (MT) |
Detector module #1 gain mode | flag Instrument housekeeping |
Detector module #1 gain mode. 0=high, 1=low. | delta_time | ||
| dma_htr_i | FLOAT64 (MT) |
Detector module #1 detector heater current | microamps Instrument housekeeping |
Detector module #1 detector heater current. | delta_time | ||
| dma_hv_i | FLOAT64 (MT) |
Detector module #1 high voltage current | microamps Instrument housekeeping |
Detector module #1 high voltage current draw by APD at bias voltage. | delta_time | ||
| dma_hvbias_cmd | FLOAT64 (MT) |
Detector module #1 high voltage bias commanded | volts Instrument housekeeping |
Detector module #1 commanded high voltage bias voltage for APD bias. | delta_time | ||
| dma_hvbias_meas | FLOAT64 (MT) |
Detector module #1 high voltage bias measured | volts Instrument housekeeping |
Detector module #1 measured high voltage bias voltage for APD bias. | delta_time | ||
| dma_hvbias_setpt | FLOAT64 (MT) |
Detector module #1 high voltage bias setpoint | volts Instrument housekeeping |
Detector module #1 high voltage bias setpoint. | delta_time | ||
| dma_n5p0_v | FLOAT64 (MT) |
Detector module #1 -5V | volts Instrument housekeeping |
Detector module #1 DPU -5V power supply voltage. | delta_time | ||
| dma_p12_v | FLOAT64 (MT) |
Detector module #1 +12V | volts Instrument housekeeping |
Detector module #1 DPU +12V power supply voltage. | delta_time | ||
| dma_p5p0_v | FLOAT64 (MT) |
Detector module #1 +5V | volts Instrument housekeeping |
Detector module #1 DPU +5V power supply voltage. | delta_time | ||
| dmb_det_t | FLOAT64 (MT) |
Detector module #2 detector temperature | Degrees Celsius Instrument housekeeping |
Detector module #2 detector temperature on APD pedestal. | delta_time | ||
| dmb_gain_mode | FLOAT64 (MT) |
Detector module #2 gain mode | flag Instrument housekeeping |
Detector module #2 gain mode. 0=high, 1=low. | delta_time | ||
| dmb_htr_i | FLOAT64 (MT) |
Detector module #2 detector heater current | microamps Instrument housekeeping |
Detector module #2 detector heater current. | delta_time | ||
| dmb_hv_i | FLOAT64 (MT) |
Detector module #2 high voltage current | microamps Instrument housekeeping |
Detector module #2 high voltage current draw by APD at bias voltage. | delta_time | ||
| dmb_hvbias_cmd | FLOAT64 (MT) |
Detector module #2 high voltage bias commanded | volts Instrument housekeeping |
Detector module #2 commanded high voltage bias voltage for APD bias. | delta_time | ||
| dmb_hvbias_meas | FLOAT64 (MT) |
Detector module #2 high voltage bias measured | volts Instrument housekeeping |
Detector module #2 measured high voltage bias voltage for APD bias. | delta_time | ||
| dmb_hvbias_setpt | FLOAT64 (MT) |
Detector module #2 high voltage bias setpoint | volts Instrument housekeeping |
Detector module #2 high voltage bias setpoint. | delta_time | ||
| dmb_n5p0_v | FLOAT64 (MT) |
Detector module #2 -5V | volts Instrument housekeeping |
Detector module #2 DPU -5V power supply voltage. | delta_time | ||
| dmb_p12_v | FLOAT64 (MT) |
Detector module #2 +12V | volts Instrument housekeeping |
Detector module #2 DPU +12V power supply voltage. | delta_time | ||
| dmb_p5p0_v | FLOAT64 (MT) |
Detector module #2 +5V | volts Instrument housekeeping |
Detector module #2 DPU +5V power supply voltage. | delta_time | ||
| interp | UINT8 (MT) |
Interpolated | boolean Derived |
Flag if instrument HK data was interpolated for this time (used HK data from last HK data present). | delta_time | ||
| interp_even_odd_nsemean | UINT8 (MT) |
Interpolated even odd noise mean | boolean Derived |
Flag if instrument even and odd mean noise HK data was interpolated for this time (used HK data from last HK data present). | delta_time | ||
| last_lzr_mode | FLOAT64 (MT) |
Last laser mode | flag Instrument housekeeping |
Laser mode before current laser mode. 0=standby, 1=warmup, 2=wlkbk, 3=operational. | delta_time | ||
| lzr_mode | FLOAT64 (MT) |
Laser mode | flag Instrument housekeeping |
Current laser mode. 0=standby, 1=warmup, 2=wlkbk, 3=operational. | delta_time | ||
| nsemean | FLOAT64 (MT) |
Noise mean | counts from the ADC Instrument housekeeping |
Noise mean of the beam's detector channel. | delta_time | ||
| nsemean_even | FLOAT64 (MT) |
Noise mean even | counts from the ADC Instrument housekeeping |
Noise mean of the beam's detector channel from even sub-converter. | delta_time | ||
| nsemean_odd | FLOAT64 (MT) |
Noise mean odd | counts from the ADC Instrument housekeeping |
Noise mean of the beam's odd sub-converter. | delta_time | ||
| rxgate_frac | FLOAT64 (MT) |
RX gate fraction | 0.1 microseconds Instrument housekeeping |
t-time offset for receive gate fraction (0-9). | delta_time | ||
| rxgate_usec | FLOAT64 (MT) |
RX gate microseconds | microseconds Instrument housekeeping |
t-time offset for receive gate. | delta_time | ||
| rxgateadj_frac | FLOAT64 (MT) |
RX gate adjust fraction | 0.1 microseconds Instrument housekeeping |
t-time offset for receive gate fraction (0-9). | delta_time | ||
| rxgateadj_usec | FLOAT64 (MT) |
RX gate adjust microseconds | microseconds Instrument housekeeping |
t-time offset for receive gate. | delta_time | ||
| time_since_last_lzr_mode | FLOAT64 (MT) |
Time since last laser mode | seconds Derived |
Time laser has been in current laser mode. Current looks at just the 15 minutes before start of file (so maximum time on at start of file is 15 minutes). | delta_time | ||
| time_since_valid_HK | FLOAT64 (MT) |
Time since last valid HK value | seconds Derived |
Number of seconds the HK data has needed to be interpolated. | delta_time | ||
| time_since_valid_even_odd_mean_HK | FLOAT64 (MT) |
Time since last valid HK value | seconds Derived |
Number of seconds the even odd nsemean HK data has needed to be interpolated. | delta_time | ||
| txgate_frac | FLOAT64 (MT) |
TX gate fraction | 0.1 microseconds Instrument housekeeping |
t-time for start of laser transmit gate fraction (0-9). | delta_time | ||
| txgate_usec | FLOAT64 (MT) |
TX gate microseconds | microseconds Instrument housekeeping |
t-time for start of laser transmit gate. | delta_time | ||
| Group: /BEAMXXXX/TX_PROCESSING | |||||||
| wp-average-waveform_githash | (Attribute) | Git commit hash of the wp-average-waveform software used to create the L1A file | |||||
| wp-average-waveform_version | (Attribute) | Version number of the wp-average-waveform software used to create the L1A file | |||||
| wp-flags_githash | (Attribute) | Git commit hash of the wp-flags software used to create the L1A file | |||||
| wp-flags_version | (Attribute) | Version number of the wp-flags software used to create the L1A file | |||||
| wp-gaussian-fit_githash | (Attribute) | Git commit hash of the wp-gaussian-fit software used to create the L1A file | |||||
| wp-gaussian-fit_version | (Attribute) | Version number of the wp-gaussian-fit software used to create the L1A file | |||||
| Label | Datatype (Dimensions) |
long_name | units source |
description | |||
| range_bin0 | FLOAT64 (MT) |
Range bin 0 | sample intervals (~1 ns) Derived |
Range in sample intervals (~1 ns) from the center of the TX pulse to the start of the RX window. | delta_time | ||
| range_bin0_error | FLOAT64 (MT) |
Range bin 0 error | sample intervals (~1 ns) Derived |
Error on range_bin0. | delta_time | ||
| range_lastbin | FLOAT64 (MT) |
Range last bin | sample intervals (~1 ns) Derived |
Range in sample intervals (~1 ns) from the center of the TX pulse to the end of the RX window. | delta_time | ||
| range_lastbin_error | FLOAT64 (MT) |
Range last bin error | sample intervals (~1 ns) Derived |
Error on range_lastbin. | delta_time | ||
| rx_energy | FLOAT64 (MT) |
RX energy | sample number (~1ns) multiplied by counts from the ADC Derived |
Integrated energy in RX waveform after subtracting the noise mean. | delta_time | ||
| short_term_av_end_time_frac | FLOAT64 (MT) |
Short term average end time fraction | seconds Derived |
End time for span over which the average waveform was computed (fractional part). | delta_time | ||
| short_term_av_end_time_int | INT64 (AV) |
Short term average end time integer | seconds Derived |
End time for span over which the average waveform was computed (integer part, seconds since master_time_epoch). | |||
| short_term_av_start_time_frac | FLOAT64 (AV) |
Short term average start time fraction | seconds Derived |
End time for span over which the average waveform was computed (fractional part). | |||
| short_term_av_start_time_int | INT64 (AV) |
Short term average start time integer | seconds Derived |
Start time for span over which the average waveform was computed (integer part, seconds since master_time_epoch) | |||
| short_term_av_tx_waveform | FLOAT64 (AV,UNLIMITED) |
Short term average TX waveform | counts from the ADC Derived |
Average waveforms between the short term average start and end time [2D array]. One per laser turn-on period. | |||
| tx_ampflag | INT32 (MT) |
TX amplitude flag | boolean Derived |
Amplitude flag is set when TX waveform amplitude is too weak or too close to saturation. Limits are defined in tx_ampbounds_ul and tx_ampbounds_ll. | delta_time | ||
| tx_cntsat | INT64 (MT) |
TX saturation count | sample intervals (~1 ns) Derived |
Maximum number of sequential saturated sample intervals (~1 ns) in the TX waveform. | delta_time | ||
| tx_egamplitude | FLOAT64 (MT) |
TX extended Gaussian amplitude | counts from the ADC Derived |
Amplitude of the extended Gaussian fit to the TX waveform. | delta_time | ||
| tx_egamplitude_error | FLOAT64 (MT) |
TX extended Gaussian amplitude error | counts from the ADC Derived |
Error on tx_egamplitude. | delta_time | ||
| tx_egbias | FLOAT64 (MT) |
TX extended Gaussian bias | counts from the ADC Derived |
Bias of the extended Gaussian fit to the TX waveform. | delta_time | ||
| tx_egbias_error | FLOAT64 (MT) |
TX extended Gaussian bias error | counts from the ADC Derived |
Error on tx_egbias. | delta_time | ||
| tx_egcenter | FLOAT64 (MT) |
TX extended Gaussian center | sample intervals (~1 ns) Derived |
Center of the extended Gaussian fit to the TX waveform. | delta_time | ||
| tx_egcenter_error | FLOAT64 (MT) |
TX extended Gaussian center error | sample intervals (~1 ns) Derived |
Error on tx_egcenter_error. | delta_time | ||
| tx_egchisq | FLOAT64 (MT) |
TX extended Gaussian chi squared | N/A Derived |
Residual RSS of extended Gaussian fit to the TX waveform. | delta_time | ||
| tx_egflag | INT32 (MT) |
TX extended Gaussian flag | flag Derived |
Extended Gaussian fit status flag. 1=convergence in chi2 value, 2=convergence in parameter value, 3=convergence in chi2 and parameter values, 4=convergence in orthogonality, 5=maximum number of iterations reached, 6=ftol too small (no further improvement), 7=xtol too small (no further improvement), 8=gtol too small (no further improvement). | delta_time | ||
| tx_eggamma | FLOAT64 (MT) |
TX extended Gaussian gamma | N/A Derived |
Gamma value of the extended Gaussian fit to the TX waveform. | delta_time | ||
| tx_eggamma_error | FLOAT64 (MT) |
TX extended Gaussian gamma error | N/A Derived |
Error on tx_eggamma. | delta_time | ||
| tx_egiters | INT32 (MT) |
TX extended Gaussian iterations | iterations Derived |
Number of iterations to converge extended Gaussian fit to TX waveform. | delta_time | ||
| tx_egsigma | FLOAT64 (MT) |
TX extended Gaussian sigma | sample intervals (~1 ns) Derived |
Sigma of the extended Gaussian fit to the TX waveform. | delta_time | ||
| tx_egsigma_error | FLOAT64 (MT) |
TX extended Gaussian sigma error | sample intervals (~1 ns) Derived |
Error on tx_egsigma. | delta_time | ||
| tx_energy | FLOAT64 (MT) |
TX energy | sample number (~1ns) multiplied by counts from the ADC Derived |
Integrated energy in TX waveform after subtracting the noise mean. | delta_time | ||
| tx_gamplitude | FLOAT64 (MT) |
TX Gaussian amplitude | counts from the ADC Derived |
Amplitude of the Gaussian fit to the TX waveform. | delta_time | ||
| tx_gamplitude_error | FLOAT64 (MT) |
TX Gaussian amplitude error | counts Derived |
Error on tx_gamplitude. | delta_time | ||
| tx_gbias | FLOAT64 (MT) |
TX Gaussian bias | counts from the ADC Derived |
Bias of the Gaussian fit to the TX waveform. | delta_time | ||
| tx_gbias_error | FLOAT64 (MT) |
TX Gaussian bias error | counts from the ADC Derived |
Error on tx_gbias. | delta_time | ||
| tx_gchisq | FLOAT64 (MT) |
TX Gaussian chi squared | N/A Derived |
Residual RSS of Gaussian fit to the TX waveform. | delta_time | ||
| tx_gflag | INT32 (MT) |
TX Gaussian flag | flag Derived |
Gaussian fit status flag. 1=convergence in chi2 value, 2=convergence in parameter value, 3=convergence in chi2 and parameter values, 4=convergence in orthogonality, 5=maximum number of iterations reached, 6=ftol too small (no further improvement), 7=xtol too small (no further improvement), 8=gtol too small (no further improvement). | delta_time | ||
| tx_giters | INT32 (MT) |
TX Gaussian iterations | iterations Derived |
Number of iterations to converge Gaussian fit to TX waveform. | delta_time | ||
| tx_gloc | FLOAT64 (MT) |
TX Gaussian location | sample intervals (~1 ns) Derived |
Location (mean) of the Gaussian fit to the TX waveform. | delta_time | ||
| tx_gloc_error | FLOAT64 (MT) |
TX Gaussian location error | sample intervals (~1 ns) Derived |
Error on tx_gloc. | delta_time | ||
| tx_gwidth | FLOAT64 (MT) |
TX Gaussian width | sample intervals (~1 ns) Derived |
Width of the Gaussian fit to the TX waveform. | delta_time | ||
| tx_gwidth_error | FLOAT64 (MT) |
TX Gaussian width error | sample intervals (~1 ns) Derived |
Error on tx_gwidth. | delta_time | ||
| tx_maxamp | FLOAT64 (MT) |
TX maximum amplitude | counts from the ADC Derived |
Maximum amplitude in each TX waveform. | delta_time | ||
| tx_minamp | FLOAT64 (MT) |
TX minimum amplitude | counts from the ADC Derived |
Minimum amplitude in each TX waveform. | delta_time | ||
| tx_peakloc | INT64 (MT) |
TX peak location | sample intervals (~1 ns) Derived |
Location of the bin containing the point with the maximum amplitude. | delta_time | ||
| tx_pulseflag | INT32 (MT) |
TX pulse flag | boolean Derived |
Set to 1 if a pulse is detected in the TX waveform. | delta_time | ||
| tx_ringflag | INT32 (MT) |
TX ring flag | boolean Derived |
Set to 1 if there is a ringing pattern in the TX waveform. | delta_time | ||
| tx_satflag | INT32 (MT) |
TX saturation flag | boolean Derived |
Set to 1 if the TX waveform has been clipped. Clipping is defined as an amplitude exceeding 4095. | delta_time | ||
| tx_sd_nw | FLOAT64 (MT) |
Noise standard deviation, floating point. | counts from the ADC Derived |
Noise standard deviation, floating point. | delta_time | ||
| Group: /BEAMXXXX/TX_PROCESSING/ancillary | |||||||
| Label | Datatype (Dimensions) |
long_name | units source |
description | |||
| centerbin | INT64 (1) |
Center bin | sample intervals (~1 ns) Configuration |
The center position for computing the TX pulse waveform average. | |||
| good_laser_mode | INT32 (1) |
Good laser mode | N/A Configuration |
Only shots with this laser mode number were used to compute average waveforms. | |||
| min_laser_on_time_seconds | FLOAT64 (1) |
Minimum laser on time in seconds | seconds Configuration |
Time to ignore at the start of a turn on period when computing an average waveform. | |||
| mpfit_max_func_evals | INT64 (1) |
MPFit maximum function evaluations | counter Configuration |
Maximum number of function evalutions allowed for fitting the Gaussian/extended Gaussian to the TX waveform. | |||
| mpfit_maxiters | INT64 (1) |
MPFit maximum iterations | counter Configuration |
Maximum number of iterations allowed for fitting the Gaussian/extended Gaussian to the TX waveform. | |||
| mpfit_tolerance | FLOAT64 (1) |
MPFit tolerance | N/A Configuration |
Convergence tolerance when fitting the Gaussian/extended Gaussian to the TX waveform. | |||
| resolution | FLOAT64 (1) |
Resolution | N/A Configuration |
Waveform resampling factor for waveform averaging. | |||
| saturated_amp | INT64 (1) |
Saturated amplitude | counts from the ADC Configuration |
Waveform amplitudes above this value are considered saturated. | |||
| tx_ampbounds_ll | INT64 (1) |
TX amplitude bounds lower level | counts from the ADC Configuration |
Lower allowable waveform peak above the mean noise. Used to set tx_ampflag. | |||
| tx_ampbounds_ul | INT64 (1) |
TX amplitude bounds upper level | counts from the ADC Configuration |
Upper allowable waveform value when subtracted from the saturation amplitude. Used to set tx_ampflag. | |||
| tx_constraint_egamplitude_lower | FLOAT64 (1) |
TX extended Gaussian lower amplitude constraint | counts from the ADC Configuration |
Lower allowable limit for the TX extended Gaussian fit amplitude. | |||
| tx_constraint_egamplitude_upper | FLOAT64 (1) |
TX extended Gaussian upper amplitude constraint | counts from the ADC Configuration |
Upper allowable limit for the TX extended Gaussian fit amplitude. | |||
| tx_constraint_eggamma_lower | FLOAT64 (1) |
TX extended Gaussian lower gamma constraint | Configuration |
Lower allowable limit for the TX extended Gaussian fit gamma parameter. | |||
| tx_constraint_eggamma_upper | FLOAT64 (1) |
TX extended Gaussian upper gamma constraint | Configuration |
Upper allowable limit for the TX extended Gaussian fit gamma parameter. | |||
| tx_constraint_egloc_lower | FLOAT64 (1) |
TX extended Gaussian lower location constraint | sample intervals (~1 ns) Configuration |
Lower allowable limit for the TX extended Gaussian fit location. | |||
| tx_constraint_egloc_upper | FLOAT64 (1) |
TX extended Gaussian upper location constraint | sample intervals (~1 ns) Configuration |
Upper allowable limit for the TX extended Gaussian fit location. | |||
| tx_constraint_egwidth_lower | FLOAT64 (1) |
TX extended Gaussian lower width constraint | sample intervals (~1 ns) Configuration |
Lower allowable limit for the TX extended Gaussian fit width. | |||
| tx_constraint_egwidth_upper | FLOAT64 (1) |
TX extended Gaussian upper width constraint | sample intervals (~1 ns) Configuration |
Upper allowable limit for the TX extended Gaussian fit width. | |||
| tx_constraint_gamplitude_lower | FLOAT64 (1) |
TX Gaussian lower amplitude constraint | counts from the ADC Configuration |
Lower allowable limit for the TX Gaussian fit amplitude. | |||
| tx_constraint_gamplitude_upper | FLOAT64 (1) |
TX Gaussian upper amplitude constraint | counts from the ADC Configuration |
Upper allowable limit for the TX Gaussian fit amplitude. | |||
| tx_constraint_gloc_lower | FLOAT64 (1) |
TX Gaussian lower location constraint | sample intervals (~1 ns) Configuration |
Lower allowable limit for the TX Gaussian fit location. | |||
| tx_constraint_gloc_upper | FLOAT64 (1) |
TX Gaussian upper location constraint | sample intervals (~1 ns) Configuration |
Upper allowable limit for the TX Gaussian fit location. | |||
| tx_constraint_gwidth_lower | FLOAT64 (1) |
TX Gaussian lower width constraint | sample intervals (~1 ns) Configuration |
Lower allowable limit for the TX Gaussian fit width. | |||
| tx_constraint_gwidth_upper | FLOAT64 (1) |
TX Gaussian upper width constraint | counts from the ADC Configuration |
Upper allowable limit for the TX Gaussian fit width. | |||
| tx_estimate_bias | INT32 (1) |
TX estimate bias | boolean Configuration |
If set to 1, a bias was estimated as part of the Gaussian/extended gaussian fits. Set to 0 otherwise. | |||
| tx_mean_noise_level | FLOAT64 (1) |
TX mean noise level | counts from the ADC Configuration |
If amplitude is less than this value, no gaussian fitting is performed to the TX waveform. | |||
| tx_pulsethresh | INT64 (1) |
TX pulse threshold | counts from the ADC Configuration |
If the amplitude is greater than the standard deviation multiplied by tx_pulsethresh, a TX waveform pulse exists. | |||
| tx_ringthresh | INT64 (1) |
TX ring threshold | counts from the ADC Configuration |
Threshold for post pulse minimum to indicate problematic levels of ringing in the detector. | |||
| tx_smoothwidth | FLOAT64 (1) |
TX smoothing width | sample intervals (~1 ns) Configuration |
Smoothing width to apply to waveforms before Gaussian/extended Gaussian fitting. | |||
| Group: /BEAMXXXX/geolocation | |||||||
| description | (Attribute) | Geolocation | ${DESCRIPTION} | ||||
| vegas_githash | (Attribute) | Git commit hash of the VEGAS software used to create the L1A file | |||||
| vegas_version | (Attribute) | Version number of the VEGAS software used to create the L1A file | |||||
| Label | Datatype (Dimensions) |
long_name | units source |
description | |||
| altitude_instrument | FLOAT64 (MT) |
Instrument altitude | meters Derived |
Height of the instrument diffractive optical element (DOE) above the WGS84 ellipsoid. | delta_time latitude_instrument longitude_instrument | delta_time | |
| altitude_instrument_error | FLOAT64 (MT) |
Instrument altitude error | meters Derived |
Error on altitude_instrument. | delta_time latitude_instrument longitude_instrument | delta_time | |
| bounce_time_offset_bin0 | FLOAT64 (MT) |
Bounce time offset bin 0 | seconds Derived |
The difference between the transmit time and the time at the start of the RX window | delta_time latitude_bin0 longitude_bin0 | delta_time | |
| bounce_time_offset_bin0_error | FLOAT64 (MT) |
Bounce time offset bin 0 error | seconds Derived |
Error on bounce_time_offset_bin0. | delta_time latitude_bin0 longitude_bin0 | delta_time | |
| bounce_time_offset_lastbin | FLOAT64 (MT) |
Bounce time offset last bin | seconds Derived |
The difference between the transmit time and the time at the end of the RX window | delta_time latitude_lastbin longitude_lastbin | delta_time | |
| bounce_time_offset_lastbin_error | FLOAT64 (MT) |
Bounce time offset last bin error | seconds Derived |
Error on bounce_time_offset_lastbin. | delta_time latitude_lastbin longitude_lastbin | delta_time | |
| degrade | INT8 (MT) |
Degrade | flag Derived |
Greater than zero if the shot occurs during a degrade period, zero otherwise. | delta_time | ||
| delta_time | FLOAT64 (MT) |
Delta time | seconds since 2018-01-01 Derived |
Transmit time of the shot, measured in seconds from the master_time_epoch. By adding the offset contained within /BEAMXXXX/ancillary/master_time_epoch to delta_time, the time in GPS seconds relative to the GPS epoch can be computed. Equivalent to /BEAMXXXX/master_int+/BEAMXXXX/master_frac. | delta_time latitude_bin0 longitude_bin0 | ||
| digital_elevation_model | FLOAT64 (MT) |
Digital elevation model | meters TanDEM-X DEM |
Digital elevation model height above the WGS84 ellipsoid. Interpolated at latitude_bin0 and longitude_bin0 from the TandemX 90m product. | delta_time latitude_bin0 longitude_bin0 | delta_time | -999999.0 |
| elevation_bin0 | FLOAT64 (MT) |
Bounce elevation bin 0 | meters Derived |
Height of the start of the RX window, relative to the WGS-84 ellipsoid. Includes corrections due to the range bias, atmospheric path delay, solid Earth tides, ocean loading, ocean pole tide, and solid Earth pole tide. | delta_time latitude_bin0 longitude_bin0 | delta_time | |
| elevation_bin0_error | FLOAT64 (MT) |
Bounce elevation bin 0 error | meters Derived |
Error on elevation_bin0. | delta_time latitude_bin0 longitude_bin0 | delta_time | |
| elevation_lastbin | FLOAT64 (MT) |
Bounce elevation last bin | meters Derived |
Height of the end of the RX window, relative to the WGS-84 ellipsoid. Includes corrections due to the range bias, atmospheric path delay, solid Earth tides, ocean loading, ocean pole tide, and solid Earth pole tide. | delta_time latitude_lastbin longitude_lastbin | delta_time | |
| elevation_lastbin_error | FLOAT64 (MT) |
Bounce elevation last bin error | meters Derived |
Error on elevation_lastbin. | delta_time latitude_lastbin longitude_lastbin | delta_time | |
| latitude_bin0 | FLOAT64 (MT) |
Bounce latitude bin 0 | degrees Derived |
Latitude of the start of the RX window. | delta_time longitude_bin0 | delta_time | |
| latitude_bin0_error | FLOAT64 (MT) |
Bounce latitude bin 0 error | degrees Derived |
Error on latitude_bin0. | delta_time latitude_bin0 longitude_bin0 | delta_time | |
| latitude_lastbin | FLOAT64 (MT) |
Bounce latitude last bin | degrees Derived |
Latitude of the end of the RX window. | delta_time longitude_lastbin | delta_time | |
| latitude_lastbin_error | FLOAT64 (MT) |
Bounce latitude last bin error | degrees Derived |
Error on latitude_lastbin. | delta_time latitude_lastbin longitude_lastbin | delta_time | |
| latitude_instrument | FLOAT64 (MT) |
Instrument latitude | degrees Derived |
Latitude of the instrument diffractive optical element (DOE) at laser transmit time. | delta_time | ||
| latitude_instrument_error | FLOAT64 (MT) |
Instrument latitude error | degrees Derived |
Error on latitude_instrument. | delta_time | ||
| local_beam_azimuth | FLOAT64 (MT) |
Local beam azimuth | radians Derived |
Azimuth of the unit pointing vector for the laser in the local ENU frame. The angle is measured from North and positive towards East. | delta_time latitude_bin0 longitude_bin0 | delta_time | |
| local_beam_azimuth_error | FLOAT64 (MT) |
Local beam azimuth error | radians Derived |
Error on local_beam_azimuth. | delta_time latitude_bin0 longitude_bin0 | delta_time | |
| local_beam_elevation | FLOAT64 (MT) |
Local beam elevation | radians Derived |
Elevation of the unit pointing vector for the laser in the local ENU frame. The angle is measured from East-North plane and positive towards Up. | delta_time latitude_bin0 longitude_bin0 | delta_time | |
| local_beam_elevation_error | FLOAT64 (MT) |
Local beam elevation error | radians Derived |
Error on local_beam_elevation. | delta_time latitude_bin0 longitude_bin0 | delta_time | |
| longitude_bin0 | FLOAT64 (MT) |
Bounce longitude bin 0 | degrees Derived |
Longitude of the start of the RX window. | delta_time latitude_bin0 | delta_time | |
| longitude_bin0_error | FLOAT64 (MT) |
Bounce longitude bin 0 error | degrees Derived |
Error on longitude_bin0. | delta_time latitude_bin0 longitude_bin0 | delta_time | |
| longitude_lastbin | FLOAT64 (MT) |
Bounce longitude last bin | degrees Derived |
Longitude of the end of the RX window. | delta_time latitude_lastbin | delta_time | |
| longitude_lastbin_error | FLOAT64 (MT) |
Bounce longitude last bin error | degrees Derived |
Error on longitude_lastbin. | delta_time latitude_lastbin longitude_lastbin | delta_time | |
| longitude_instrument | FLOAT64 (MT) |
Instrument longitude | degrees Derived |
Longitude of the instrument diffractive optical element (DOE) at laser transmit time. | delta_time | ||
| longitude_instrument_error | FLOAT64 (MT) |
Instrument longitude error | degrees Derived |
Error on longitude_instrument. | delta_time | ||
| mean_sea_surface | FLOAT64 (MT) |
Mean sea surface | meters DTU15 |
Mean sea surface height above the WGS84 ellipsoid, includes the geoid. Interpolated at latitude_bin0 and longitude_bin0 from DTU15. | delta_time latitude_bin0 longitude_bin0 | delta_time | |
| neutat_delay_derivative_bin0 | FLOAT64 (MT) |
(Neutral atmosphere delay)/dh bin 0 | meters/meter Derived |
Change in neutral atmospheric delay per height change for the start of the RX window. | delta_time latitude_bin0 longitude_bin0 | delta_time | |
| neutat_delay_derivative_lastbin | FLOAT64 (MT) |
(Neutral atmosphere delay)/dh last bin | meters/meter Derived |
Change in neutral atmospheric delay per height change for the end of the RX window. | delta_time latitude_lastbin longitude_lastbin | delta_time | |
| neutat_delay_total_bin0 | FLOAT64 (MT) |
Total neutral atmospheric delay bin 0 | meters Derived |
Total neutral atmosphere delay correction (wet+dry) from the TX pulse to the start of the RX window (computed according to ICESat-2 ATL03A ATDB). This value is subtracted from the range during geolocation. | delta_time latitude_bin0 longitude_bin0 | delta_time | |
| neutat_delay_total_lastbin | FLOAT64 (MT) |
Total neutral atmospheric delay last bin | meters Derived |
Total neutral atmosphere delay correction (wet+dry) from the TX pulse to the end of the RX window (computed according to ICESat-2 ATL03A ATDB). This value is subtracted from the range during geolocation. | delta_time latitude_lastbin longitude_lastbin | delta_time | |
| range_bias_correction | FLOAT32 (MT) |
Range bias correction | meters Derived |
The range bias applied to the range measurement. This value is subtracted from the range to get the corrected range. | delta_time latitude_bin0 longitude_bin0 | delta_time | |
| shot_number | FLOAT64 (MT) |
Shot number | counter Derived |
Unique shot ID. | delta_time latitude_bin0 longitude_bin0 | delta_time | |
| solar_azimuth | FLOAT32 (MT) |
Solar azimuth | degrees Derived |
The azimuth of the sun position vector from the laser bounce point position in the local ENU frame. The angle is measured from North and is positive towards East. | delta_time latitude_bin0 longitude_bin0 | delta_time | |
| solar_elevation | FLOAT32 (MT) |
Solar elevation | degrees Derived |
The elevation of the sun position vector from the laser bounce point position in the local ENU frame. The angle is measured from the East-North plane and is positive Up. | delta_time latitude_bin0 longitude_bin0 | delta_time | |
| surface_type | INT8 (5,MT) |
Surface type | boolean ICESat-2 surface type mask |
Flags describing which surface types this interval is associated with. 0=not type, 1=is type. Order of array is land, ocean, sea ice, land ice, inland water. | delta_time latitude_bin0 longitude_bin0 | delta_time | |
| Group: /BEAMXXXX/geophys_corr | |||||||
| description | (Attribute) | Geophysical corrections | ${DESCRIPTION} | ||||
| vegas_githash | (Attribute) | Git commit hash of the VEGAS software used to create the L1A file | |||||
| vegas_version | (Attribute) | Version number of the VEGAS software used to create the L1A file | |||||
| Label | Datatype (Dimensions) |
long_name | units source |
description | |||
| delta_time | FLOAT64 (MT) |
Delta time | seconds since 2018-01-01 Derived |
Transmit time of the shot, measured in seconds from the master_time_epoch. By adding the offset contained within /BEAMXXXX/ancillary/master_time_epoch to delta_time, the time in GPS seconds relative to the GPS epoch can be computed. Equivalent to /BEAMXXXX/master_int+/BEAMXXXX/master_frac. | |||
| dynamic_atmosphere_correction | FLOAT64 (MT) |
Dynamic atmosphere correction | meters MOG2D |
Dynamic Atmospheric Correction (DAC) includes inverted barometer (IB) effect. | delta_time | ||
| geoid | FLOAT64 (MT) |
Geoid | meters Derived from EGM2008 |
Geoid height above WGS-84 reference ellipsoid (range -107 to 86m). Not applied on the product. | delta_time | ||
| tide_earth | FLOAT64 (MT) |
Earth tide | meters IERS conventions (2010) |
Solid Earth tides | delta_time | ||
| tide_load | FLOAT64 (MT) |
Load tide | meters GOT 4.8 |
Load Tide - Local displacement due to Ocean Loading (-6 to 0 cm). | delta_time | ||
| tide_ocean | FLOAT64 (MT) |
Ocean tide | meters GOT 4.8 |
Ocean Tides including diurnal and semi-diurnal (harmonic analysis), and longer period tides (dynamic and self-consistent equilibrium). | delta_time | ||
| tide_ocean_pole | FLOAT64 (MT) |
Ocean pole tide | meters IERS conventions (2010) |
Oceanic surface rotational deformation due to polar motion (-2 to 2 mm). | delta_time | ||
| tide_pole | FLOAT64 (MT) |
Solid earth pole tide | meters IERS conventions (2010) |
Solid Earth Pole Tide -- Rotational deformation due to polar motion (-1.5 to 1.5 cm). | delta_time | ||
| Group: /BEAMXXXX/land_surface_data | |||||||
| Label | Datatype (Dimensions) |
long_name | units source |
description | |||
| landsat_treecover | FLOAT64 (MT) |
Landsat tree canopy cover | percent Derived from treecover2010_v3 geotiff tiles |
Tree cover in the year 2010, defined as canopy closure for all vegetation taller than 5m in height (Hansen et al.). Encoded as a percentage per output grid cell. | ../geolocation/delta_time ../geolocation/latitude_bin0 ../geolocation/longitude_bin0 | delta_time | -9999.0 |
| modis_treecover | FLOAT64 (MT) |
MODIS tree cover | percent Derived from MODIS geotiff tiles |
Percent tree cover from MODIS data. Interpolated at latitude_bin0 and longitude_bin0. doi:10.5067/MODIS/MOD44B.006 | ../geolocation/delta_time ../geolocation/latitude_bin0 ../geolocation/longitude_bin0 | delta_time | -9999.0 |
| modis_treecover_sd | FLOAT64 (MT) |
MODIS tree cover standard deviation | percent Derived from MODIS geotiff tiles |
Percent tree cover standard deviation from MODIS data. Interpolated at latitude_bin0 and longitude_bin0. doi:10.5067/MODIS/MOD44B.006 | ../geolocation/delta_time ../geolocation/latitude_bin0 ../geolocation/longitude_bin0 | delta_time | -9999.0 |
| modis_nonvegetated | FLOAT64 (MT) |
MODIS non-vegetated | percent Derived from MODIS geotiff tiles |
Percent non-vegetated from MODIS data. Interpolated at latitude_bin0 and longitude_bin0. doi:10.5067/MODIS/MOD44B.006 | ../geolocation/delta_time ../geolocation/latitude_bin0 ../geolocation/longitude_bin0 | delta_time | -9999.0 |
| modis_nonvegetated_sd | FLOAT64 (MT) |
MODIS non-vegetated standard deviation | percent Derived from MODIS geotiff tiles |
Percent non-vegetated standard deviation from MODIS data. Interpolated at latitude_bin0 and longitude_bin0. doi:10.5067/MODIS/MOD44B.006 | ../geolocation/delta_time ../geolocation/latitude_bin0 ../geolocation/longitude_bin0 | delta_time | -9999.0 |