Question about geophysical corrections in GEDI Level2A dataset

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john6444
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Question about geophysical corrections in GEDI Level2A dataset

by john6444 » Thu Sep 11, 2025 11:13 pm America/New_York

Dear Sir or Madam,

The Algorithm Theoretical Basis Document (website: https://www.earthdata.nasa.gov/data/catalog/lpcloud-gedi01-b-002#documents-and-resources) has indicated that "elevation_bin0" and "elevation_lastbin" of Level1B dataset have been processed with geophysical corrections (i.e., solid earth tide, ocean loading, solid earth pole tide, and ocean pole tide).

I have a question to ask: are these geophysical corrections have been applied for any parameter in GEDI Level2A dataset? More specifically, have "elev_lowestmodel_aN" parameter of Level2A dataset been undergone geophysical corrections? If not, is there any solution to make geophysical corrections for Level2A dataset?

Thanks for your time.

Cheers,
Jw

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LP DAAC - dgolon
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Re: Question about geophysical corrections in GEDI Level2A dataset

by LP DAAC - dgolon » Fri Sep 12, 2025 3:08 pm America/New_York

Hi @john6444 Thanks for writing in. We are checking with our science team on an answer for you. We will follow up when we have more details. Thanks -- Danielle
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john6444
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Re: Question about geophysical corrections in GEDI Level2A dataset

by john6444 » Sat Sep 13, 2025 12:46 am America/New_York

Hi Danielle,

Thanks for your response and I am looking forward to your further detailed response.

Cheers,
Jw

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Re: Question about geophysical corrections in GEDI Level2A dataset

by LP DAAC - lien » Fri Sep 19, 2025 2:38 pm America/New_York

Hi Jw,

The NASA PI confirmed: "Elevs in the L2A and down are derived directly from the L1B geolocated waveform
So any geophysical/atmosphere corrections applied to the L1B are then going to be in all the l2a etc elevation products"
Thank you for your patience while we verified this, and have good weekend.
Brett

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