Search found 59 matches

by LP DAAC - ckrehbiel
Wed Mar 24, 2021 2:08 pm America/New_York
Forum: All Questions/Comments
Question: GEDI Footprint Above Ground Biomass Density ATBD
Replies: 1

Re: GEDI Footprint Above Ground Biomass Density ATBD

According to: https://daac.ornl.gov/cgi-bin/dataset_lister.pl?p=40
"Footprint and Gridded Above Ground Biomass (L4) products will be available later in calendar year 2021."
by LP DAAC - ckrehbiel
Wed Mar 24, 2021 2:07 pm America/New_York
Forum: All Questions/Comments
Question: Timeline for GEDI L3-L4 Products
Replies: 1

Re: Timeline for GEDI L3-L4 Products

According to: https://daac.ornl.gov/cgi-bin/dataset_lister.pl?p=40 "Gridded (L3) GEDI data are available from ORNL DAAC. Footprint and Gridded Above Ground Biomass (L4) products will be available later in calendar year 2021." GEDI L3 Gridded Land Surface Metrics, Version 1 are available at...
by LP DAAC - ckrehbiel
Wed Mar 24, 2021 2:05 pm America/New_York
Forum: All Questions/Comments
Question: Integrating GEDI Data with Elevation and Vegetation Type at 30 m Resolution
Replies: 1

Re: Integrating GEDI Data with Elevation and Vegetation Type at 30 m Resolution

There is some work done on generating a Global Forest Canopy Height, which is an extrapolation of GEDI with Landsat, led by the GLAD team at UMD. There are limitations, with saturation above 30m height. It was the first demo of combining GEDI with Landsat. (Hansen et al; combining optical with versi...
by LP DAAC - ckrehbiel
Wed Mar 24, 2021 2:03 pm America/New_York
Forum: All Questions/Comments
Question: GEDI Data Reliability for Canopy Cover in Mountain Forests
Replies: 1

Re: GEDI Data Reliability for Canopy Cover in Mountain Forests

Use the quality flags to assure that you are only using high-quality returns over high-relief or mountainous regions. Be mindful as the uncertainty will increase over high slopes.
by LP DAAC - ckrehbiel
Wed Mar 24, 2021 2:00 pm America/New_York
Forum: All Questions/Comments
Question: GEDI Penetration of Water and Ice
Replies: 1

Re: GEDI Penetration of Water and Ice

1 micron data does not penetrate water.
by LP DAAC - ckrehbiel
Wed Mar 24, 2021 1:59 pm America/New_York
Forum: All Questions/Comments
Question: GEDI Nighttime vs. Daytime Acquisitions
Replies: 1

Re: GEDI Nighttime vs. Daytime Acquisitions

GEDI data acquired at night may be more useful/have slightly better data quality due to the lack of solar background noise.
by LP DAAC - ckrehbiel
Wed Mar 24, 2021 1:55 pm America/New_York
Forum: All Questions/Comments
Question: GEDI vs. ICESat-2
Replies: 1

Re: GEDI vs. ICESat-2

GEDI is designed to measure tree height. ICESat-2 and GEDI measure in different ways with GEDI being full waveform. GEDI was specifically designed for veg height, so the footprint size is designed as such. Canopy has a better reflectance at 1064 nm (GEDI) than 532 nm(ICESat-2). GEDI was specificall...
by LP DAAC - ckrehbiel
Wed Mar 24, 2021 1:51 pm America/New_York
Forum: All Questions/Comments
Question: Using GEDI in Grasslands and Croplands
Replies: 1

Re: Using GEDI in Grasslands and Croplands

GEDI is not designed for measurement of non-woody or near ground vegetation, where it may be difficult to separate the canopy and ground signals. In addition to canopy height of woody vegetation, GEDI provides estimates of canopy cover, Plant Area Index and their vertical profiles, and aboveground b...
by LP DAAC - ckrehbiel
Wed Mar 24, 2021 1:50 pm America/New_York
Forum: All Questions/Comments
Question: GEDI Performance over Wetlands
Replies: 1

Re: GEDI Performance over Wetlands

GEDI is not designed for measurement of non-woody or near ground vegetation. Additionally, over wetlands, water levels and inundation can affect the estimation.
by LP DAAC - ckrehbiel
Wed Mar 24, 2021 1:47 pm America/New_York
Forum: All Questions/Comments
Question: GEDI Height Detection over Rangelands/Grasslands
Replies: 1

Re: GEDI Height Detection over Rangelands/Grasslands

GEDI is not designed for measurement of non-woody or near ground vegetation, and it can be difficult to separate canopy and ground in non-woody environments.