Return a complete NCEP water vapor image
Create a water vapor image by retrieving an NCEP image. Also create a QC image that indicates the origin of the water vapor values.
- HOUR
- Acquisition hour used to determine which NCEP model to retrieve:
HOUR Z model ------- -------- 0-2 00 3-8 06 9-14 12 15-20 18 21-23 00 (next day's)
- MONTH
- Month of output image
- DAY
- Day of output image
- YEAR
- Four digit year of output image
- OUT
- Filled water vapor output image. A 1-band image of water vapor values.
- QC
- Quality Control output image. A 1-band image containing QC values which indicate the origin of water vapor values. (See User Note 3)
- SILOBASEDIR
- Base SILO directory (See User Notes 1 and 2)
- WATERBASEDIR
- Base water vapor directory (See User Note 1)
- BACKDIR(--)
- Backup water vapor directory (See User Note 5)
The NCEP daily observation for June 4, 1998 is retrieved from /avhrr/ncep_watervapor/1998. The output images created will be called jun04water and jun04qc.
The input parameters are combined to create image names of the daily observation. The SILO is checked to see if the closest daily NCEP image exists. If it does, this NCEP image is returned. If not, the SILO is checked to see if an NCEP image for 6 hours later exists. If it does, this NCEP image is returned. If not, the SILO is checked to see if an NCEP image for 6 hours earlier exists. If it does, this NCEP image is returned. A QC image is created and returned along with the NCEP water vapor image.
The daily NCEP image was not on the SILO or the SILO was not operational. Verify that the SILO is operational.
The appropriate QC image was not available. Contact the system administator if this error persists.
A fatal error was encountered during processing. Processing is terminated. The error message that is displayed immediately preceding this message is the specific error that was encountered.
basedir \--- tovs_watervapor \--- dailyfillam \--- dailyfillpm \--- 1979 \--- 1980 \--- ... \--- 2000 basedir \--- ncep_watervapor \--- 1979 \--- 1980 \--- ... \--- 2000
0 - pixel value from daily TOVS observation 1 - pixel value from daily TOVS climatology 2 - pixel value from monthly TOVS climatology 3 - pixel value was interpolated in monthly TOVS climatology 5 - pixel value from NCEP model (closest hour) 6 - pixel value from NCEP model ( + 6 hours) 7 - pixel value from NCEP model ( - 6 hours)
The backup directory is only a backup for the silo and as such only the img files are copied. There are cd's in the archive containing all TOVS and NCEP images except the current year. Current years images are archived in January of the following year. The CD's are stored as code 049; project AVHRR greeness; and description: TOVS/NCEP water vapor YYYY. The ADAPS software person should have an online backup of current year images available.