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Data Set ID:
ATL02

ATLAS/ICESat-2 L1B Converted Telemetry Data, Version 3

This data set (ATL02) contains science unit-converted, time-ordered telemetry data, calibrated for instrument effects, downlinked from the Advanced Topographic Laser Altimeter System (ATLAS) instrument on board the Ice, Cloud and land Elevation Satellite-2 (ICESat-2) observatory. The data are used by the ATLAS/ICESat-2 Science Investigator-led Processing System (SIPS) for system–level, quality control analysis and as source data for ATLAS/ICESat-2 Level-2 products and the Precision Orbit Determination (POD) and Precision Pointing Determination (PPD) computations.

This is the most recent version of these data.

Version Summary:

Changes for this version include:

  1. Improved/fixed a number of reported QA parameters to better reflect phenomena of concern.
  2. Corrected a math error in the ATBD for ATL02 (Equation 5-13) and updated the corresponding receiver return sensitivity code. This calculation interpolates transmit/receive misalignment between AMCS offset updates.
  3. Addressed several documentation issues within the ATL02 file metadata related to units and descriptions.
  4. Removed the temperature parameter from /ancillary_data/calibrations/nominal_rx_sensitivity. As the nominal receiver sensitivity calibration is no longer indexed by temperature, this parameter has become irrelevant.
  5. Added a patch to detect and correct anomalous transmit fine count swap issues
  6. Corrected a code error such that the temperature used for CAL-47 now references the correct thermistor.
  7. Corrected for a coarse count issue that occurs simultaneously with the fine count swap issue described in (5) (above). The new method subtracts 1 from the coarse count if the start marker is equal to 1.

STANDARD Level of Service

Data: Data integrity and usability verified

Documentation: Key metadata and user guide available

User Support: Assistance with data access and usage; guidance on use of data in tools

See All Level of Service Details

Parameter(s):
  • LIDAR > Engineering Telemetry Ancillary Data
Data Format(s):
  • HDF5
Spatial Coverage:
N: 90, 
S: -90, 
E: 180, 
W: -180
Platform(s):ICESat-2
Spatial Resolution:Not applicableSensor(s):ATLAS
Temporal Coverage:
  • 13 October 2018
Version(s):V3
Temporal ResolutionNot applicableMetadata XML:View Metadata Record
Data Contributor(s):Anthony Martino, Megan Bock, Catherine Gosmeyer, Christopher Field, Thomas Neumann, David Hancock, Robert Jones III, Philip Dabney, Charles Webb

Geographic Coverage

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As a condition of using these data, you must cite the use of this data set using the following citation. For more information, see our Use and Copyright Web page.

Martino, A. J., M. R. Bock, C. Gosmeyer, C. Field, T. A. Neumann, D. Hancock, R. L. Jones III, P. W. Dabney, C. E. Webb, and J. Lee. 2020. ATLAS/ICESat-2 L1B Converted Telemetry Data, Version 3. [Indicate subset used]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. doi: https://doi.org/10.5067/ATLAS/ATL02.003. [Date Accessed].

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