
|
- Product information in the upper right describes the types of data.
You probably want ATL08: ATLAS/ICESat-2 L3A Land and Vegetation Height.
- Select a region, using the button on the upper left
- Click on the track you want.
- Pick the date from those available
- Insure that the points on the desired profile appear; it is easy to
leave them with the past profile
- Click in the region, on the highlighted orbit, and click on one
of the dates which should trigger the display of some of the points, and then view
ATL08 elevation profile from the popup menu.
- You want to use the section of the form with the red
rectangles on the screen capture to the left.
- Insure that you have gotten a new track. The
program tends to retain the same track, especially if you
did not pick the track with the date option. The track
number will be on the title for the graph. The track will
also be in the files names, after the date
- Insure you are downloading the Elevation Profile (ATL08), and
not the ATL06 (Land Ice Surface) or ATL12 (Ocean Surface) or the
ATL13 (inland waters). If you get these, you will have
to do a lot of manipulation with the data to make it
workable. Which of the products appear
depends on the location. The Red X's shows
where you do not want to download data if you are looking
for elevations on land.
- The track will not be in the download file names, but is
inside the CSV data.
- If there are multiple dates, you can switch among them
on the top of the form.
- The 3D viewer option below can be useful
- All 6 beams will be in the same download file; you can
Filter to
only display one beam; if you zoom in, you will see the separate ground
tracks. This will show the ground and the top of the canopy, and
uncertainty estimates.
- You can also view the
ATL02 photons
(which leads to much larger data sets)
- Pick the tab above the graph to switch between photons
and elevations
- Each beam will be a separate download. The beam
name will be in the xml metadata file.
- There is a confidence value, 0-4, for Noise, Buffer, Low, Medium,
High
- The 3D viewer option below can be useful, but may be
slow with the volume of data to display
- Icesat-2 photon data to LAS
which will transfrom to geoid, and can merge multiple input files
- Data volumes can be large, and consider the area needed
carefully. Excel might choke on some of the files, but
MICRODEM should be able to use them.
- Heights will be on WGS84 ellipsoid.
- Prep the data
|