WEBVTT

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Welcome to the EROS

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User Experience webinar series,
where we talk to staff at Eros

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to learn more about the data, tools
and services coming out of the USGS

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Earth Resources Observation and Science,
or EROS Center.

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Today's webinar is titled Landsat

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Special Requests: Expanding Acquisition
Capabilities.

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I am your host, Danielle Golon.

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The Remote sensing user Services lead here
at EROS in Sioux Falls, South Dakota.

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The time is currently 12 p.m.

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central,
so let's go ahead and get started.

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First, a few logistics to ensure the best
audio experience.

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All participants have been muted.

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If you have any questions

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or comments during the webinar,
please use the Q&A feature,

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which can be found under the more settings
if you do not see it currently.

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If this feature does not work for you,
please feel free to enter your questions

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or feedback into the chat,

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and we will address all questions
and feedback at the end of the webinar.

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If you cannot use the Q&A feature
or the chat due to your organization

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settings, please feel free to email
your questions to conserve at USGS gov.

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That is custserv@usgs.gov
and we will answer them there.

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Today's webinar is being recorded.

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The recording will be available
later on the USGS

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Eros User Experience Webinars web page.

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At the start and end of the webinar,
we will have a few polling questions.

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These polls are optional,

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but your answers can help us create
a better user experience in the future.

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The polls questions will be available via
the polls feature and teams,

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and I also have added them to the team's
chat for our audience members

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who are not able to use the team's polls
feature

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due to their organization settings.

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If the polls feature
is not working for you,

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please feel free to respond
to the questions in the chat instead.

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The questions are the same,
so please either use that polls feature

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or the chat,
whichever option works best for you.

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At this point, you should now be able
to see the first set of polling questions.

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Please feel free
to fill those out at your leisure.

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We will leave them open
during the entire webinar.

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Today's webinar
will consist of a presentation,

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several live demonstrations,
and then a question and answer session.

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Today's speaker is Jacob Savoy.

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Jacob is a Landsat User services
specialist here at the Aero Center.

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Jacob is a contractor
serving as the primary User Services

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representative for Landsat
related inquiries, where Jacob provides

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front line support to the user community
on topics ranging from general Landsat

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data questions to troubleshooting the USGS

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machine to machine or M to M API.

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Jacob holds a master's of Science
in Geographic Information Systems,

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or GIS, from John Hopkins
University, and has spent the past

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five years
supporting the Eros User Services team.

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We also have several Aero staff members
from User Services and the Landsat team

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here at Eros on the line
to help answer any questions you may have.

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After Jacob has finished
his presentation again, please feel free

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to add any questions or feedback
throughout the webinar using

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that Q&A feature in teams
or the webinar chat.

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We will try to answer all questions
within the time allotted,

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but if we are not able to address
your question during the final Q&A

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portion of the webinar,
we will follow up with you offline.

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And if there is a future webinar topic
you would like us to cover.

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Please feel free to suggest that as well.

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With that is my pleasure to introduce
today's speaker, Jacob Savoy.

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Take it away, Jacob.

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So, as Danielle said,
my name is Jacob Savoy, and we're gonna be

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talking about Landsat special requests
and how you can get involved

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to expand the imaging capabilities
for your own research.

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So before digging into
the special request, wanted to give some

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background information on Landsat
and our standard acquisition plan.

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So for Landsat 8 and Landsat
9, they each acquire

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about 750 scenes
every day, with their main focus

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being on continental landmasses
and nearshore coastal zones.

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For Landsat, daytime
imagery is the most common type of imagery

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that we acquire,

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since both our Operational Land Imager
and Thermal Infrared Sensor

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All in tears are able to acquire
data, and historically,

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that means a mean equatorial crossing
for each of the satellites is about 10:12

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a.m., plus or minus about five minutes
local time.

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This is a map of what our acquisition plan
looks like,

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and so we give different priorities
to different areas on Earth.

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This is our descending
or daytime acquisitions.

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So as you can see,
as I said we focus mainly

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on continental landmasses
and then near shore.

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However, we do have images going up
towards the poles,

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small islands, that kind of stuff
that we do put a priority on.

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You can see just because of daylight
hours, there's kind of a cutoff,

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both north and south,
that there is a lower priority.

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However, that is made up for our ascending
or nighttime acquisitions

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where there is a higher priority
on those polar regions.

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And that's just due

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to the rotation of the Earth
and how the satellites orbits are set.

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We are able to get even lit images,
even at night,

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just because of how
the summer solstice works.

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So what is a Landsat special request?

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They are an opportunity for the scientific
community to task the Landsat satellites

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outside of the nominal acquisition plan,
so they are able to get imagery at night

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when there is less priority,
or over oceans or whatever that might be.

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And this goes
into a couple common reasons.

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So as I said, nighttime polar
and then ocean or just images that are

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not in the standard acquisition plan
or that the scientific community

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has a specific interest in that
we need to place a higher priority on.

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I have a couple examples of these.

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So for this first one, we're looking at
a nighttime image over Phoenix, Arizona.

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This was collected
the 24th of October in 2025.

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And a reason
somebody might want a image like this

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as they are studying nighttime urban heat
index.

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And again,

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Phoenix being in the southwest US
has that kind of high capacity for heat.

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So as you can see on the left there,
that is just an image from band two

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that would come from the OLI sensor,
because we're not getting that visible

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light being reflected during the night.

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You really don't get much information
there.

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However, band ten,
which is our thermal infrared,

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you can see the outline of Phoenix proper,
the mountains surrounding it,

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some of the reservoirs that feed into
the system, and you're able to zoom in

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and see things like individual streets,
buildings, that kind of stuff.

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Did provide a second example here.

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This one is a near
polar example, also taken at night.

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This focuses on Ellesmere
Island up in Greenland.

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This is a two part example.

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This first part we're looking at image
from August 5th of 2017.

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And again
due to how the satellite path works,

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this image was actually acquired
about 2:45 p.m.

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local time.

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Somebody might want a image like this

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if they are studying ice
extent up in this area.

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And so I will show this first image on
the left is over

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Greenland with this pink area
showing where that scene was acquired.

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And then the image on the right
is that scene.

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You can see it is very snowy, very icy,

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but we do see a lot of that
rock outcropping.

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And this is the second part of that.

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Again, same location.

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However this one is later in a season.

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I was looking for cloud free imagery
for this demonstration,

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so we jumped all the way to 2023
in September.

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And again, this is about 2:50 p.m.

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local time when the image was acquired.

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As you can see,
there is much heavier snow ice cover.

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You can still see the outline
of some of those rock outcroppings.

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However, they are mostly covered
at this point in time.

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Just for visual comparison.

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Again 2017 to 2023.

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And again,
one of the reasons you might look

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at exploring something like
this is to look at ice extent.

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And so maybe looking at that thermal data.

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So as you can see on the left image
that is the 2017

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looks like those landmasses,
those rocky outcroppings

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are actually warmer
than the surrounding areas.

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However, when you have greater ice extent
in that 2023 image, those values

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basically flip on each other
and the water ice areas

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are actually showing
as a warmer temperature there.

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As a part of

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that polar acquisition,
we did institute a extended acquisition

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of our polling areas,
and these focus on the Arctic, Antarctic

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and Greenland areas, and they are covered
under something called our leap.

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Just to give a little understanding
on that,

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I did pull some images here
that show again our increased priority.

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So you can see the Antarctica, Greenland
and Arctic region and how that leap

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plays out in those different areas
as a part of special request.

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We do have ongoing annual requests.

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So if you are interested in
any of these topics,

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these are things that are already covered.

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So you don't necessarily
need to submit your own.

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We have a annual volcano campaign
that is global.

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So a lot of the volcanoes, again,

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because there's lots of research
being done there.

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We don't necessarily know when they're
going to erupt or that kind of things.

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We are acquiring images
whenever the satellites pass

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over those locations,
as well as Ellesmere Island.

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That was in those previous demonstrations,
the Arctic

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and Antarctic areas
that are covered by the leap.

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And then there is a large western US
and Alaska campaign

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that we collect imagery at nighttime
during the fire season.

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So if you're looking at acquiring any
imagery, we do have this acquisition tool.

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And so well, that will do is
you can select

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either
the ascending or descending pathways,

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and that will give you an estimate
of which satellite as well as

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which dates
would be covered by your area of interest.

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And I have a couple of zoomed in pictures
here that will go over in just a second.

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So these in blue are going to be
the descending or daytime scenes.

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As you can see, they kind of go
from the northeast down to the southwest

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and then kind of

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have that same sort of curve
once they get towards the South Pole,

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just because
of the pathway of the satellite.

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This would be for I believe this is today
that I got this screenshot for.

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So this is what the path
for the daytime imagery looks like today.

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And then the

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anticipated nighttime acquisitions
in green here again

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they kind of reversed that direction
because there's that looping pattern

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that kind of go from the southeast
to the northwest.

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In this instance.

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We do have a video here
showing the pathways.

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This is just for Landsat eight
and just during the daytime.

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So using that

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acquisition tool,
this is kind of just a zoomed in version.

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And I'll leave it here
for a couple of seconds.

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Again this is our pending acquisitions
for today.

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So you can kind of see

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where the satellites might pass over
and then get an estimate of,

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you know,
if you are interested in that area,

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what kind of timeline
you might be looking at.

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All right.

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So digging into the special requests
where to find those forms,

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they are on our Landsat acquisitions web

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page, specifically
under the Special Request for future

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Landsat Acquisition section,
we have both a single path row

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request form if you're looking
just for imagery over a single area.

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But we also have a multiple path row
request form where if you are looking at

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an area of interest
that covers more than a single path row,

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or you were looking at multiple areas of

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interest at the same time, you can submit
that all in a single request.

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As far
as the single path row request form.

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We will go over that here shortly.

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I've got a example pulled up,
but we're basically asking questions

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like who are you?

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What are you interested in studying?

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What satellites
do you want to use that kind of stuff.

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And then as far as the multiple path
request form goes,

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it is basically the same questions.

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It's just on a word document

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so that you could submit multiple
path rows in that form.

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And the reason we offer
that is to make it easier for you.

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So rather than submitting 4 or 5, six,
ten, a dozen single path row

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request forms and entering

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all that information at the same time,
you only have to enter it once,

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and then it also allows us
to keep all of your information one place.

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So if there's ever any questions
you need to make changes wish to extend,

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then we're only looking at one request
rather than however many you needed

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to submit

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when submitting the multiple path
row requests.

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We do also require that you submit
a CSV file, and that can also be linked

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on that form where we saw the both single
and multiple path row

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request forms, and that is a requirement
for it to be submitted.

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Now let me flip over.

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I have pulled up

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our single path row request

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form here and I will zoom in.

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So this is what it looks like.

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Like I said, it's pretty basic information

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we're looking for
when you're submitting the request.

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Your name, what company or agency
you're associated with,

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whether that's a university,
a company, a research group, whatever

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that might be your telephone number,

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a good way to contact you,

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the type of request, whether you're
working for a government entity,

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a university,
a research group, whatever that might be,

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which sensor

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you would like imagery
from most commonly people

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because of the availability,
will request from both

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a general outline of which path rows
you are looking at

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a date range for when you are

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hoping to get imagery from,
and then a short little blurb

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about what you intend
on using that Landsat imagery for.

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So, like in this case,
those path rows cover Sioux Falls,

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South Dakota,
and a reason why you might be interested

00:15:13.750 --> 00:15:17.750
looking at urban heat over the city
as well as the surrounding areas.

00:15:18.291 --> 00:15:21.583
So as I said,
this is our multiple pathway request form.

00:15:21.625 --> 00:15:26.333
When you do submit that,
we are looking for that additional CSV

00:15:26.333 --> 00:15:29.916
and all that,
that is, is basically the path rows

00:15:29.958 --> 00:15:33.791
listed out as that can be fed
into our system and uploaded.

00:15:33.791 --> 00:15:37.833
So there is no potential issue
for clerical areas, mistranslations,

00:15:37.833 --> 00:15:39.083
anything like that.

00:15:41.375 --> 00:15:44.000
What to expect when you do submit a form.

00:15:44.000 --> 00:15:47.708
So as you fill them out
you should send it to our USGS

00:15:47.750 --> 00:15:51.500
User Services group
when we receive that from you.

00:15:51.541 --> 00:15:54.750
You should expect an email from us
when the request is submitted

00:15:54.791 --> 00:15:58.333
and that should be coming from
that serve at USGS gov email.

00:15:58.333 --> 00:16:02.250
And then as it works
through the approval process and again

00:16:02.250 --> 00:16:05.458
as the request is about to expire,
we do send automated emails

00:16:05.458 --> 00:16:08.458
just to kind of let
you know where things are at.

00:16:08.708 --> 00:16:12.958
If the request is approved, data
acquired from the satellites is posted

00:16:12.958 --> 00:16:16.916
to our Earth Explorer and other USGS
data portals where applicable.

00:16:18.041 --> 00:16:20.750
And then as the request
is about to expire,

00:16:20.750 --> 00:16:23.625
you will receive emails
reminding you of that expiration.

00:16:23.625 --> 00:16:24.291
Those emails are.

00:16:24.291 --> 00:16:28.541
Reminder if you have a ongoing campaign
you wish to extend,

00:16:28.583 --> 00:16:32.708
that is your chance to message us
to get a new request submitted.

00:16:32.875 --> 00:16:36.416
And we do send those out
about seven days beforehand.

00:16:36.458 --> 00:16:41.541
And that's just so we make sure that there
are no gaps in your acquisition imagery,

00:16:41.541 --> 00:16:45.291
so that you don't miss a chance
at catching whatever you're studying.

00:16:46.125 --> 00:16:48.333
If the request is denied,
you should receive

00:16:48.333 --> 00:16:51.833
an automated message from us
informing that the request was denied.

00:16:52.791 --> 00:16:53.875
If at any point you

00:16:53.875 --> 00:16:56.958
have questions regarding the status
of the request, you need to make changes.

00:16:56.958 --> 00:16:58.041
Wish to extend?

00:16:58.041 --> 00:17:03.166
Again, please email our User Services
group at that serve at USGS gov email.

00:17:03.833 --> 00:17:06.166
As far as timelines
and when to expect things.

00:17:06.166 --> 00:17:09.791
Once you send a request to us, it is
usually submitted within a couple of days.

00:17:09.791 --> 00:17:13.333
Just depends on what else is going on,
what priorities are,

00:17:13.666 --> 00:17:15.916
how many requests we have coming
in, that kind of stuff.

00:17:15.916 --> 00:17:18.625
Approval
usually happens within about two weeks.

00:17:18.625 --> 00:17:22.458
We do suggest that you submit
earlier than two weeks,

00:17:22.458 --> 00:17:26.666
because it does take time for the request
to be passed through approval processes

00:17:26.666 --> 00:17:27.833
and then up to the satellite.

00:17:27.833 --> 00:17:29.083
And so you should always plan

00:17:29.083 --> 00:17:33.250
on submitting at least two weeks
before your first anticipated acquisition.

00:17:33.291 --> 00:17:34.916
You can submit sooner than this.

00:17:34.916 --> 00:17:36.208
So if it is approved,

00:17:36.208 --> 00:17:37.416
then acquisitions will start

00:17:37.416 --> 00:17:41.125
coming down on whatever
that first date of the request is.

00:17:41.166 --> 00:17:44.916
When you should start seeing imagery
is either the first pass of the satellites

00:17:44.916 --> 00:17:47.791
after it has been approved,
or after that first start date.

00:17:47.791 --> 00:17:50.041
If you submitted early,
and then you should expect

00:17:50.041 --> 00:17:51.625
to get those expiration reminders

00:17:51.625 --> 00:17:55.041
starting every day about one week
before the expiration.

00:17:55.791 --> 00:17:58.541
There are some limitations
to the special request

00:17:58.541 --> 00:18:01.291
so the scientific community
can make requests.

00:18:01.291 --> 00:18:04.500
The public can submit requests as long as
they go through the same process.

00:18:04.500 --> 00:18:09.500
But priority is always going to be
put on research oriented focuses.

00:18:09.500 --> 00:18:13.625
If you're looking at studying something,
if you're submitting for something like,

00:18:13.625 --> 00:18:16.583
hey, I want an image over my house
on this specific day

00:18:16.583 --> 00:18:18.583
that has a higher likelihood
of getting denied.

00:18:18.583 --> 00:18:22.166
As far as limitations,
we also have a timing limitation.

00:18:22.166 --> 00:18:25.083
So as I said on the last slide,
we need time to submit

00:18:25.083 --> 00:18:27.208
and approve the request
and send it up to the satellite.

00:18:27.208 --> 00:18:31.083
So we do suggest submitting
about the two weeks early and then request

00:18:31.125 --> 00:18:32.583
can only run for about a year.

00:18:32.583 --> 00:18:36.541
Anything longer will have to be renewed,
but that will go through the same process.

00:18:36.541 --> 00:18:39.416
You could submit the same forms
just with updated dates,

00:18:39.416 --> 00:18:42.458
and then our Landsat ground stations
can only ingest so much data.

00:18:42.458 --> 00:18:45.208
So if you have a huge request
or there are a lot of requests

00:18:45.208 --> 00:18:46.625
going out at the same time,

00:18:46.625 --> 00:18:50.250
there is the possibility of getting denied
just based on what those priorities are.

00:18:50.250 --> 00:18:53.666
And then approval because of there are
multiple steps in the approval process.

00:18:53.666 --> 00:18:55.833
Requests can be denied for any reason.

00:18:55.833 --> 00:18:59.916
We do our best to find out what those are,
but if a request is denied, ultimately

00:18:59.916 --> 00:19:01.416
it's denied. We can try.

00:19:01.416 --> 00:19:04.416
But that's kind of where it ends

00:19:04.416 --> 00:19:08.583
as far as accessing the data
or finding it once it has been acquired.

00:19:08.958 --> 00:19:11.958
One of the best places to do
so is on our Earth Explorer page.

00:19:12.000 --> 00:19:15.791
I have a couple slides here
in case things aren't working right, but

00:19:15.791 --> 00:19:20.125
otherwise let me flip over to a browser
and we'll do this live.

00:19:21.666 --> 00:19:23.541
So that

00:19:23.541 --> 00:19:26.916
fake request we did, we focused over
Sioux Falls, South Dakota.

00:19:26.916 --> 00:19:30.000
That's kind of
where our Eros Center is located.

00:19:30.166 --> 00:19:35.458
So when you're on our Earth Explorer page,
if you want to set a area of interest,

00:19:35.458 --> 00:19:37.541
all you've got to do
is find the map, zoom in

00:19:37.541 --> 00:19:40.041
to where you want to be,
and you can click.

00:19:40.041 --> 00:19:41.250
And that should set a Pin.

00:19:41.250 --> 00:19:44.416
If you click multiple times,
you should start drawing a polygon.

00:19:44.791 --> 00:19:49.583
Otherwise, if you know what specific path
row you are interested in, there is this.

00:19:49.583 --> 00:19:54.166
Select a geocoding method
and you can go from feature to path row.

00:19:54.166 --> 00:20:00.500
And so for like Sioux Falls
I know we are looking at path 123 row 214.

00:20:00.833 --> 00:20:04.916
And it should also drop a pin in
the center of where that scene would be.

00:20:04.916 --> 00:20:09.500
If you are looking at a specific time
frame like you've had a request

00:20:09.541 --> 00:20:14.708
going for any length of time, you can set
your date range and cloud cover.

00:20:14.750 --> 00:20:16.333
However, you don't need to do that.

00:20:16.333 --> 00:20:20.333
We can then proceed to our data sets,
and I would always advise

00:20:20.333 --> 00:20:23.458
first looking at our Landsat
collection two level one

00:20:24.916 --> 00:20:28.041
and Landsat eight nine are the only ones
that are acquiring at this time.

00:20:28.041 --> 00:20:28.958
So if

00:20:28.958 --> 00:20:33.083
we're looking at that example request,
we're going to be looking for that data.

00:20:33.125 --> 00:20:37.083
And the reason we suggest that collection
two level one is because in order

00:20:37.083 --> 00:20:42.250
to get process to level two, there is
certain accuracies and information.

00:20:42.250 --> 00:20:45.250
We need to be able to process it
to the higher level.

00:20:45.666 --> 00:20:51.250
So some of that is missing
when we miss out on that Oli imagery.

00:20:51.291 --> 00:20:54.500
So I always recommend
starting with the level one product.

00:20:55.541 --> 00:20:59.125
Then again, as most of our special
requests are going to be nighttime

00:20:59.125 --> 00:21:02.791
imagery, you can proceed to this
additional criteria tab here.

00:21:02.833 --> 00:21:04.916
And there is a day night indicator.

00:21:04.916 --> 00:21:08.000
And so we can look specifically
for nighttime imagery.

00:21:09.125 --> 00:21:11.916
When we
hit our results it should load here.

00:21:11.916 --> 00:21:16.666
And as you can see one second
let me redo this here.

00:21:18.958 --> 00:21:21.333
Like we were getting
too many results there.

00:21:21.333 --> 00:21:25.333
So let me make sure
we're getting the right information.

00:21:28.208 --> 00:21:28.666
There we go.

00:21:28.666 --> 00:21:31.541
That looks better.

00:21:31.541 --> 00:21:32.875
Currently I am not logged in.

00:21:32.875 --> 00:21:35.833
If you wish to download
something you will need to be logged in,

00:21:35.833 --> 00:21:40.041
but you can preview the imagery here
and see where it might be.

00:21:40.083 --> 00:21:43.041
And again,
see if that fits your needs based on that

00:21:43.041 --> 00:21:46.041
acquisition.

00:21:47.375 --> 00:21:49.083
Flipping back to our slides,

00:21:49.083 --> 00:21:51.958
like I said,
you can view the data on Earth Explorer,

00:21:51.958 --> 00:21:54.958
but if you want to download anything,
you're going to need to set up an account

00:21:54.958 --> 00:21:58.250
with our EROS
registration system and be logged in.

00:21:59.666 --> 00:22:00.458
Setting our area of

00:22:00.458 --> 00:22:05.750
interest, selecting our data sets,
selecting our additional criteria,

00:22:05.750 --> 00:22:08.916
and then preview and download
as you are logged in.

00:22:09.708 --> 00:22:12.708
If you ever need assistance
navigating Earth Explorer,

00:22:12.875 --> 00:22:15.125
one of our other webinar walks
you through it.

00:22:15.125 --> 00:22:15.916
We have a link here.

00:22:15.916 --> 00:22:18.958
I believe these slides will be shared,
otherwise it can be

00:22:18.958 --> 00:22:22.458
found on the help page of Earth Explorer.

00:22:22.791 --> 00:22:26.375
As far as additional resources,
I have linked to both our long

00:22:26.416 --> 00:22:30.750
term acquisition plan, that information
as well as our extended acquisition plans.

00:22:30.750 --> 00:22:33.958
You can see where those areas over
the polar regions are.

00:22:34.000 --> 00:22:35.416
And that kind of wraps us up.

00:22:35.416 --> 00:22:38.458
If you have questions,
please feel free to reach out to us.

00:22:38.500 --> 00:22:42.000
You can email us at our serve at gov
email.

00:22:42.500 --> 00:22:46.958
Give us a call at (605) 494-6151.

00:22:46.958 --> 00:22:49.541
During our service hours, which are 8 a.m.

00:22:49.541 --> 00:22:51.541
to 4 p.m. Central Time.

00:22:51.541 --> 00:22:55.375
Otherwise,
we have a User Services contact page

00:22:55.375 --> 00:22:58.750
on the USGS EROS website.

00:22:59.375 --> 00:23:02.750
Thank you all for your time
and I'll turn it back over to Danielle.

00:23:02.750 --> 00:23:05.458
And if you've got any questions,
we can get those answered.

00:23:05.458 --> 00:23:05.916
Perfect.

00:23:05.916 --> 00:23:09.125
Thank you for a great presentation and for
showing us those really cool demos.

00:23:09.125 --> 00:23:09.958
Jacob.

00:23:09.958 --> 00:23:10.875
For those listening

00:23:10.875 --> 00:23:13.250
in, I have added a few final links
to the chat,

00:23:13.250 --> 00:23:16.958
which include more information
about Landsat, as well as links to sign up

00:23:16.958 --> 00:23:20.791
for a few listservs, a link to watch
some of our previously recorded webinars,

00:23:20.791 --> 00:23:24.458
and a few social media channels to follow
if you are interested.

00:23:24.750 --> 00:23:25.500
At this time,

00:23:25.500 --> 00:23:29.333
we'll now move on to the final optional
Polling questions portion of the webinar

00:23:29.333 --> 00:23:32.333
and answering the questions
we received during the webinar.

00:23:32.375 --> 00:23:36.958
We'll go ahead and post those polling
questions in the chat and launch them.

00:23:37.083 --> 00:23:40.083
You should see those now on your screen
or in the chat.

00:23:40.083 --> 00:23:42.541
Please take a few moments
to respond to those questions.

00:23:42.541 --> 00:23:44.416
Remember, they are optional.

00:23:44.416 --> 00:23:46.250
They are the same set of questions,
so please

00:23:46.250 --> 00:23:49.291
only answer them once via
the polls feature or in the chat.

00:23:49.333 --> 00:23:53.375
Whichever method works best for you
based on your organization settings.

00:23:53.375 --> 00:23:57.375
And if you have any final questions
or feedback about the data and tools

00:23:57.375 --> 00:23:58.333
covered today,

00:23:58.333 --> 00:24:02.458
or perhaps any data or tutorial ideas
you'd like to see out in the future,

00:24:02.500 --> 00:24:06.375
please add those to the Q&A
feature and teams or the chat now as well.

00:24:06.791 --> 00:24:10.875
With that, we'll give you a few moments
to answer the polling questions and submit

00:24:10.875 --> 00:24:12.583
any final questions or feedback

00:24:12.583 --> 00:24:16.250
you have for the team, and then we'll
address those in a few minutes.

00:24:17.166 --> 00:24:17.500
All right.

00:24:17.500 --> 00:24:21.875
I do see some of the polling
responses are coming in.

00:24:21.916 --> 00:24:24.333
So thank you to everyone answering those.

00:24:24.333 --> 00:24:26.916
Please feel free
to continue working on those.

00:24:26.916 --> 00:24:30.583
But for now we'll go ahead and start
to feel some questions from the audience.

00:24:30.791 --> 00:24:32.916
The first question we have is

00:24:32.916 --> 00:24:36.875
is there an API to access the data
instead of Earth Explorer?

00:24:36.916 --> 00:24:38.166
I can answer that.

00:24:38.166 --> 00:24:42.250
We do have our machine machine API,
if you've got questions on that.

00:24:42.291 --> 00:24:46.541
We've got a couple good examples out there
that if you reach out to our user

00:24:46.541 --> 00:24:50.458
services group at that email, we can send
you links to that and get you started.

00:24:50.458 --> 00:24:53.916
And there are ways to again,
if you're looking at special request data,

00:24:54.041 --> 00:24:57.083
nighttime imagery, that kind of stuff,
there are ways to filter that, to find

00:24:57.083 --> 00:24:58.333
just that imagery.

00:24:58.333 --> 00:25:02.041
Otherwise, all of our Landsat data,
as well as most of our other USGS

00:25:02.041 --> 00:25:04.958
data is posted there
so that you can access through the API.

00:25:04.958 --> 00:25:06.458
Perfect. Thank you. Jacob.

00:25:06.458 --> 00:25:08.416
We also have someone who puts in the chat.

00:25:08.416 --> 00:25:10.083
One of the challenges for users

00:25:10.083 --> 00:25:14.375
is to get suitable
ndVi data for the night tier image.

00:25:14.375 --> 00:25:17.083
In case of LST calculations.

00:25:17.083 --> 00:25:20.375
Are there any suggestions
or advice on that?

00:25:20.791 --> 00:25:23.666
So that's going to be difficult,
especially for nighttime

00:25:23.666 --> 00:25:27.916
because the Oli sensor
does not collect enough reflected light

00:25:27.916 --> 00:25:32.458
to be able to get a clear image
for the bands needed for ndVi.

00:25:32.750 --> 00:25:36.541
Again, if you're looking at surface
temperature, you can calculate, as I did

00:25:36.541 --> 00:25:39.708
in this example,
brightness temperature of the pixels.

00:25:39.708 --> 00:25:42.458
But then again,
you are dealing with atmospheric effects,

00:25:42.458 --> 00:25:45.625
and it's not going to be quite as accurate
as our level two products.

00:25:45.625 --> 00:25:49.916
But for extended studies
for getting a good glimpse of land

00:25:49.958 --> 00:25:51.041
surface temperature at night.

00:25:51.041 --> 00:25:53.041
This is an option for that. Perfect.

00:25:53.041 --> 00:25:56.791
And we did have some feedback
in the post question.

00:25:56.916 --> 00:25:58.083
The post poll question is

00:25:58.083 --> 00:26:01.166
what else can we do
to improve the Landsat special requests?

00:26:01.250 --> 00:26:04.208
And the user mentioned
send out some kind of

00:26:04.208 --> 00:26:07.583
awareness newsletter
describing ongoing special request.

00:26:07.583 --> 00:26:08.875
This is such a cool service.

00:26:08.875 --> 00:26:11.333
Thank you.
So thank you for that suggestion.

00:26:11.333 --> 00:26:13.250
We'll definitely consider that.

00:26:13.250 --> 00:26:15.875
And then we had another question
that just came in.

00:26:15.875 --> 00:26:20.916
Are there any provisions for emergency
nighttime tasking, say less than 24 hour

00:26:20.916 --> 00:26:25.333
turnaround in response to extreme events
such as wildfires?

00:26:25.333 --> 00:26:27.916
We do the best we can to get them
submitted.

00:26:27.916 --> 00:26:31.000
There are instances
that requests have been accelerated,

00:26:31.000 --> 00:26:34.041
but there is not a clear process
laid out for that.

00:26:34.041 --> 00:26:37.083
The best information we can give
is to submit it as soon as possible,

00:26:37.083 --> 00:26:41.750
and we'll get it submitted and approved
in the most timely manner that we can.

00:26:42.208 --> 00:26:43.208
Thank you. Jacob.

00:26:43.208 --> 00:26:47.166
And I'm just checking to see
if there's any questions we've missed.

00:26:47.375 --> 00:26:48.250
All right.

00:26:48.250 --> 00:26:50.333
I don't see any more questions coming in.

00:26:50.333 --> 00:26:52.416
So we'll continue on with the webinar.

00:26:52.416 --> 00:26:54.916
It looks like that's
all the questions we have for today.

00:26:54.916 --> 00:26:58.875
If you do have any additional questions
later on about Landsat,

00:26:58.916 --> 00:27:02.791
Landsat special requests
or any data, tools or services

00:27:02.833 --> 00:27:06.791
the USGS arrows provides,
you can always email our team at that

00:27:07.708 --> 00:27:10.708
USGS gov email address on your screen.

00:27:10.875 --> 00:27:11.916
I'd like to once again

00:27:11.916 --> 00:27:16.083
thank our speaker, Jacob, for his time
and great presentation and our team

00:27:16.083 --> 00:27:19.541
in the background to help answer
some of the questions you all had today.

00:27:19.541 --> 00:27:22.333
And I'd also like to
thank you all again for joining us.

00:27:22.333 --> 00:27:24.416
We hope to see you at a future webinar.

00:27:24.416 --> 00:27:28.083
If you'd like to be notified of
when our next webinar will occur, please

00:27:28.083 --> 00:27:33.666
sign up for the Eros User Services
listserv by emailing Kesavan gov.

00:27:33.791 --> 00:27:37.625
And I did see in the chat we have
a question about our our slides available.

00:27:37.625 --> 00:27:41.333
We will be posting these online
only to have the webinar recording

00:27:41.333 --> 00:27:44.500
that I'll get posted,
and we'll make sure to post those as well.

00:27:44.583 --> 00:27:46.583
If you'd like a copy earlier,

00:27:46.583 --> 00:27:50.375
please email that serve
and we'll send you a copy of the slides.

00:27:50.541 --> 00:27:53.791
Again, I want to thank you all
for taking the time to join us today.

00:27:53.875 --> 00:27:55.958
We'll stick around
in case a few more questions

00:27:55.958 --> 00:28:00.083
get asked, or to capture
some of those polling question responses.

00:28:00.125 --> 00:28:03.208
But with that, we hope you all have
a wonderful rest of the day.

00:28:03.208 --> 00:28:04.708
Thank you for joining us.

00:28:04.708 --> 00:28:08.125
Hi Howard, I see your question
about downloading the recording.

00:28:08.125 --> 00:28:11.958
We'll make sure that gets loaded
onto the website here shortly.

00:28:11.958 --> 00:28:15.833
If you'd like, I can send you an email
once the recording is live.

00:28:16.083 --> 00:28:18.041
And I do see a question.

00:28:18.041 --> 00:28:23.000
It says, is there a land size limitation
or number of path rows,

00:28:23.000 --> 00:28:27.375
or maybe a size that would affect
likely overhaul approval?

00:28:27.375 --> 00:28:29.291
So there is no hard limit set.

00:28:29.291 --> 00:28:33.041
As I said, we've got those large campaigns
looking over just about the entire

00:28:33.041 --> 00:28:34.916
western US during fire season.

00:28:34.916 --> 00:28:36.583
However, it ultimately comes down

00:28:36.583 --> 00:28:39.666
to the capacity of the satellites
as well as our ground stations.

00:28:39.666 --> 00:28:43.500
So if it is too large, it does run
that potential of getting denied.

00:28:43.500 --> 00:28:46.541
But outside of those extremely
large request, I've seen people

00:28:46.541 --> 00:28:51.083
submit requests
for a dozen 22 dozen scenes,

00:28:51.083 --> 00:28:54.083
and those usually are processed
without issue.

00:28:54.125 --> 00:28:55.666
Perfect. Thank you, Jacob.

00:28:55.666 --> 00:28:57.083
Hey, Fernando, I see your comment.

00:28:57.083 --> 00:28:59.041
Where can I go to review the PowerPoint?

00:28:59.041 --> 00:29:01.291
I had a conflict at the last minute.

00:29:01.291 --> 00:29:05.458
I'll make sure to send you a PDF
copy of the PowerPoint

00:29:05.500 --> 00:29:07.291
and if anyone else would like that,
let me know

00:29:07.291 --> 00:29:09.750
and we can get
that sent out to you as well.

00:29:09.750 --> 00:29:10.125
All right.

00:29:10.125 --> 00:29:13.166
I think we've captured all of the chat
and the questions.

00:29:13.166 --> 00:29:14.750
So we're going to conclude the webinar.

00:29:14.750 --> 00:29:16.500
Thanks again, everyone for joining us.

00:29:16.500 --> 00:29:18.750
We'll see you the next one. Thank you all.