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\begin{document}

\title{ICESat-2 Onboard Flight Receiver Algorithms: On-orbit Parameter Updates
the Impact on Science Driven Observations}



\author[1]{Lori A. Magruder}%
\author[2]{Ann R Reese}%
\author[3]{Aimée Gibbons}%
\author[4]{James T. Dietrich}%
\author[5]{Thomas A Neumann}%
\affil[1]{University of Texas at Austin}%
\affil[2]{KBR @NASA/GSFC}%
\affil[3]{KBR}%
\affil[4]{Unknown}%
\affil[5]{NASA Goddard Space Flight Center}%


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  \date{May 26, 2024}


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\begin{abstract}
The ICESat-2 (Ice, Cloud and Land Elevation Satellite-2) photon-counting
laser altimeter technology required the design and development of very
sophisticated onboard algorithms to collect, store and downlink the
observations. These algorithms utilize both software and hardware
solutions for meeting data volume requirements and optimizing the
science achievable via ICESat-2 measurements. Careful planning and
dedicated development were accomplished during the pre-launch phase of
the mission in preparation for the 2018 launch. Once on-orbit all of the
systems and subsystems were evaluated for performance, including the
receiver algorithms, to ensure compliance with mission standards and
satisfy the mission science objectives. As the mission has progressed
and the instrument performance and data volumes were better understood,
there have been several opportunities to enhance ICESat-2's
contributions to earth observation science initiated by NASA and the
ICESat-2 science community. We highlight multiple updates to the flight
receiver algorithms, the onboard software for signal processing, that
have extended ICESat-2's data capabilities and allowed for advanced
science applications beyond the original mission objectives.%
\end{abstract}%



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