Search found 59 matches

by LP DAAC - ckrehbiel
Wed Mar 24, 2021 1:43 pm America/New_York
Forum: Questions/Comments
Question: Using GEDI for Bathymetry
Replies: 1

Re: Using GEDI for Bathymetry

No, 1 micron data does not penetrate water.
by LP DAAC - ckrehbiel
Wed Mar 24, 2021 1:42 pm America/New_York
Forum: Questions/Comments
Question: Using GEDI over Mangroves
Replies: 1

Re: Using GEDI over Mangroves

Yes. GEDI measures the height of vegetation above the surface, so inundation (e.g. tides) will impact the estimation of canopy height. Validation of GEDI products is an active area of research, but targeted NASA LVIS acquisitions in the Pongara region (Gabon) are being used for this purpose. Dr. Lol...
by LP DAAC - ckrehbiel
Thu Mar 11, 2021 11:48 am America/New_York
Forum: Questions/Comments
Question: ASTER Data Download Cygwin Unable to Retrieve Data
Replies: 7

Re: ASTER Data Download Cygwin Unable to Retrieve Data

@ srleone9 I unfortunately can't help with the cygwin issue, for that specifically, I would defer to: support@earthdata.nasa.gov However, it looks like your use case is that you'd like to bulk download many different ASTER GDEM files directly from the LP DAAC Data Pool? There are a couple of solutio...
by LP DAAC - ckrehbiel
Wed Feb 10, 2021 2:19 pm America/New_York
Forum: Questions/Comments
Question: Negative GEDI RH Metrics
Replies: 1

Re: Negative GEDI RH Metrics

Relative Height is calculated by the following equation: elev_highestreturn - elev_lowestmode. The lower RH metrics (e.g., RH10) will often have negative values, particularly in low canopy cover conditions. This is because a relatively high fraction of the waveform energy is from the ground and belo...
by LP DAAC - ckrehbiel
Wed Feb 10, 2021 2:18 pm America/New_York
Forum: Questions/Comments
Question: GEDI Coverage vs. Full Power Beams
Replies: 1

Re: GEDI Coverage vs. Full Power Beams

GEDI coverage beams (beams 0000, 0001, 0010, and 0011) were designed to penetrate canopies of up to 95% canopy cover under “average” conditions. For this reason, it is recommended to preference the GEDI full power beams in cases of dense vegetation.
by LP DAAC - ckrehbiel
Tue Feb 09, 2021 4:27 pm America/New_York
Forum: Questions/Comments
Question: Using GEDI over Mangroves
Replies: 1

Using GEDI over Mangroves

User Question from GEDI NASA Earthdata Webinar: Can we use GEDI data over Mangroves, and which dataset(s) to use?
by LP DAAC - ckrehbiel
Tue Feb 09, 2021 4:24 pm America/New_York
Forum: Questions/Comments
Question: Using GEDI for Bathymetry
Replies: 1

Using GEDI for Bathymetry

User Question from GEDI NASA Earthdata Webinar: Can GEDI be used to retrieve bathymetry data on shallow lakes?
by LP DAAC - ckrehbiel
Tue Feb 09, 2021 4:09 pm America/New_York
Forum: Questions/Comments
Question: GEDI Coverage vs. Full Power Beams
Replies: 1

GEDI Coverage vs. Full Power Beams

User Question from GEDI NASA Earthdata Webinar: Is it necessary to differentiate GEDI data from coverage beams vs. from full power beams?
by LP DAAC - ckrehbiel
Tue Feb 09, 2021 4:07 pm America/New_York
Forum: Questions/Comments
Question: GEDI Height Detection over Rangelands/Grasslands
Replies: 1

GEDI Height Detection over Rangelands/Grasslands

User Question from NASA Earthdata Webinar: What is the detection limit of GEDI height metrics over rangeland and grassland ecosystems?
by LP DAAC - ckrehbiel
Tue Feb 09, 2021 4:05 pm America/New_York
Forum: Questions/Comments
Question: GEDI Performance over Wetlands
Replies: 1

GEDI Performance over Wetlands

User Question from NASA Earthdata Webinar: How does GEDI perform on shorter but dense canopies, such as wetlands with ~3m high canopies?