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Python tools for obtaining and working with elevation data from the NASA ICESat-2 mission

Project description

Language License PyPI Version Documentation Status zenodo Shot count

Python tools for obtaining and working with elevation data from the NASA ICESat-2 mission

ICESat-2 Data Products

Product

Name

Description

ATL00

Telemetry Data

Raw ATLAS telemetry in packet format

ATL01

Reformatted Telemetry

Parsed, partially reformatted into HDF5, generated daily, segmented into several minute granules

ATL02

Science Unit Converted Telemetry

Photon time of flight, corrected for instrument effects. Includes all photons, pointing data, spacecraft position, housekeeping data, engineering data, and raw atmospheric profiles, segmented into several minute granules.

ATL03

Global Geolocated Photon Data

Precise latitude, longitude and elevation for every received photon, arranged by beam in the along-track direction. Photons classified by signal vs. background, as well as by surface type (land ice, sea ice, land, ocean), including all geophysical corrections. Segmented into several minute granules.

ATL04

Uncalibrated Backscatter Profiles

Along-track atmospheric backscatter data, 25 times per second. Includes calibration coefficients for polar regions. Segmented into several minute granules.

ATL06

Land Ice Elevation

Surface height for each beam with along- and across-track slopes calculated for each beam pair. Posted at 40 meters along-track. Segmented into several minute granules.

ATL07

Arctic/Antarctic Sea Ice Elevation

Height of sea ice and open water leads at varying length scale based on returned photon rate for each beam presented along-track. Segmented into several minute granules.

ATL08

Land Water Vegetation Elevation

Height of ground including canopy surface posted at variable length scales relative to signal level, for each beam presented along-track. Where data permits include canopy height, canopy cover percentage, surface slope and roughness, and apparent reflectance.

ATL09

Calibrated Backscatter and Cloud Characteristics

Along-track cloud and other significant atmosphere layer heights, blowing snow, integrated backscatter, and optical depth.

ATL10

Arctic/Antarctic Sea Ice Freeboard

Estimate of sea ice freeboard over specific spatial scales using all available sea surface height measurements. Contains statistics of sea surface and sea ice heights.

ATL11

Antarctic/Greenland Ice Sheet H(t) Series

Time series of height at points on the ice sheet, calculated based on repeat tracks and/or cross-overs.

ATL12

Ocean Elevation

Surface height at specific length scale.

ATL13

Inland Water Height

Along-track inland and near shore water surface height distribution within water mask.

ATL14

Antarctic/Greenland Ice Sheet H(t) Gridded

Height maps of each ice sheet for each year based on all available elevation data.

ATL15

Antarctic/Greenland Ice Sheet dh/dt Gridded

Height change maps for each ice sheet, for each mission year, and for the whole mission.

ATL16

ATLAS Atmosphere Weekly

Polar cloud fraction, blowing snow frequency, ground detection frequency.

ATL17

ATLAS Atmosphere Monthly

Polar cloud fraction, blowing snow frequency, ground detection frequency.

ATL18

Land/Canopy Gridded

Gridded ground surface height, canopy height, and canopy cover estimates.

ATL19

Mean Sea Surface (MSS)

Gridded ocean height product.

ATL20

Arctic/Antarctic Gridded Sea Ice Freeboard

Gridded sea ice freeboard.

ATL21

Arctic/Antarctic Gridded Sea Surface Height w/in Sea Ice

Gridded monthly sea surface height inside the sea ice cover.

ICESat-2 Granules

Each orbit of ICESat-2 data is broken up into 14 granules. The granule boundaries limit the size of each ATL03 file and simplify the formation of higher level data products.

ICESat-2 global granules ICESat-2 polar granules

Dependencies

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A zip archive of the latest version is available directly at:

Disclaimer

This project contains work and contributions from the scientific community. This program is not sponsored or maintained by the Universities Space Research Association (USRA) or NASA. It is provided here for your convenience but with no guarantees whatsoever.

License

The content of this project is licensed under the Creative Commons Attribution 4.0 Attribution license and the source code is licensed under the MIT license.

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