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Earth and Space Science
Article . 2021 . Peer-reviewed
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Earth and Space Science
Article
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Earth and Space Science
Article . 2021
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Performance of ICESat‐2 Precision Pointing Determination

Authors: Sungkoo Bae; Benjamin Helgeson; Michael James; Lori Magruder; Jonathan Sipps; Scott Luthcke; Taylor Thomas;

Performance of ICESat‐2 Precision Pointing Determination

Abstract

AbstractGlobal elevations are critical to understanding the Earth's dynamic processes and changing climate. These measurements are best acquired from a space‐based vantage point and are most accurate using laser altimetry technology. However, the accuracy associated with the elevation retrievals from laser altimetry relies heavily on the ability to precisely determine the pointing angle of the laser beams from the satellite to the illuminated spot on the surface. The Ice, Cloud, and land Elevation Satellite 2 (ICESat‐2) has a system consisting of instruments that support the determination of the laser pointing direction through a process called Precision Pointing Determination (PPD). In this paper, we describe the PPD conceptual implementation, instrument details, data processing approach, calibration/validation techniques, and performance assessment. We show that the PPD has successfully achieved the allocated accuracy goal essential to meeting the ICESat‐2 geolocation mission requirement.

Keywords

QE1-996.5, geolocation, Astronomy, QB1-991, Geology, ATLAS, laser pointing, ICESat‐2, spacecraft attitude, calibration/validation

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
9
Top 10%
Average
Top 10%
gold