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Updated: Oct 30, 2025

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ICESat-2/ATLAS Onboard Flight Science Receiver Algorithms: Purpose, Process, and Performance.

J F McGarry1, C C Carabajal2, J L Saba3

  • 1NASA Goddard Space Flight Center Greenbelt MD USA.

Earth and Space Science (Hoboken, N.J.)
|July 5, 2021
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Summary
This summary is machine-generated.

The Advanced Topographic Laser Altimetry System (ATLAS) onboard ICESat-2 uses Receiver Algorithms to reduce data volume. These algorithms effectively distinguish surface echoes from noise, meeting mission requirements.

Keywords:
laser altimeteronboard algorithmssignal processingspace flight

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Area of Science:

  • Earth Observation
  • Satellite Technology
  • Laser Altimetry

Background:

  • The Ice, Cloud, and land Elevation Satellite 2 (ICESat-2) carries the Advanced Topographic Laser Altimetry System (ATLAS) as its sole instrument.
  • High data volume from ATLAS poses a challenge for X-band downlink capabilities and requires efficient data management.

Purpose of the Study:

  • To describe the function and performance of the ATLAS Onboard Flight Science Receiver Algorithms.
  • To validate the effectiveness of algorithms in managing telemetry data volume for the ICESat-2 mission.

Main Methods:

  • Implementing onboard Digital Elevation Models and signal processing techniques.
  • Utilizing spacecraft location and attitude data, along with reference maps for relief and surface type.
  • Distinguishing surface echoes from background noise to limit data transmission.

Main Results:

  • Ground testing confirmed the reliable performance of the Receiver Algorithms.
  • On-orbit analysis indicates the algorithms are functioning as anticipated, meeting mission data requirements.

Conclusions:

  • The Receiver Algorithms successfully manage ATLAS data volume by filtering noise and focusing on relevant signal regions.
  • The algorithms are crucial for the efficient operation of ICESat-2, ensuring mission success through effective data telemetry.