ICESat‐2/ATLAS Onboard Flight Science Receiver Algorithms: Purpose, Process, and Performance
| Autor: | Jan F. McGarry, Claudia C. Carabajal, Joseph-Paul A Swinski, Stephen P. Palm, James E. Golder, Peter Liiva, Ann R Reese, Jack L. Saba, Stephen T Holland |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
010504 meteorology & atmospheric sciences
Laser altimetry Computer science Astronomy Cloud computing QB1-991 Environmental Science (miscellaneous) 010502 geochemistry & geophysics 01 natural sciences Atlas (anatomy) medicine Instruments and Techniques space flight signal processing Research Articles 0105 earth and related environmental sciences Remote sensing Signal processing QE1-996.5 business.industry Process (computing) Elevation Astrophysics::Instrumentation and Methods for Astrophysics Geology onboard algorithms medicine.anatomical_structure laser altimeter General Earth and Planetary Sciences Satellite Cryosphere business The Ice Cloud and Land Elevation Satellite‐2 (ICESat‐2) on‐Orbit Performance Data Discoveries and Early science Research Article |
| Zdroj: | Earth and Space Science, Vol 8, Iss 4, Pp n/a-n/a (2021) Earth and Space Science (Hoboken, N.j.) |
| ISSN: | 2333-5084 |
| Popis: | The Advanced Topographic Laser Altimetry System (ATLAS) is the sole instrument on the Ice, Cloud, and land Elevation Satellite 2 (ICESat‐2). Without some method of reducing the transmitted data, the volume of ATLAS telemetry would far exceed the normal X‐band downlink capability or require many more ground station contacts. The ATLAS Onboard Flight Science Receiver Algorithms (hereinafter Receiver Algorithms or Algorithms) control the amount of science data that is telemetered from the instrument, limiting the data volume by distinguishing surface echoes from background noise, and allowing the instrument to telemeter data from only a small vertical region about the signal. This is accomplished through the transfer of the spacecraft's location and attitude to the instrument every second, use of an onboard Digital Elevation Model, implementation of signal processing techniques, and use of onboard relief and surface type reference maps. Extensive ground testing verified the performance of the Algorithms. On‐orbit analysis shows that the Algorithms are working as expected from the ground testing; they are performing well and meeting the mission requirements. Key Points Algorithms onboard ICESat‐2 limit telemetry data volume using onboard signal detection, along with elevation and relief databasesExtensive prelaunch instrument testing showed consistent results meeting mission requirementsAfter launch, the Algorithms have performed very well, with results consistent with those from the prelaunch instrument testing |
| Databáze: | OpenAIRE |
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