GPS-Based Precision Orbit Determination for the Jason-2 and Jason-3 Missions

Shailen Desai (Jet Propulsion Laboratory, United States)

CoAuthors

Willy Bertiger (JPL, USA); Bruce Haines (Jet Propulsion Laboratory, United States); Aurore Sibois (Jet Propulsion Laboratory, United States)

Event: 2017 Ocean Surface Topography Science Team Meeting

Session: Precision Orbit Determination

Presentation type: Type Oral

We present results from the precise orbit determination (POD) of the Jason-2 and Jason-3 satellites using tracking data from their respective on-board GPS receivers. Our results begin with an assessment and relative comparison of the radiometric performance of each of the GPS receivers, including tracking metrics as well as data noise. We discuss our approach to calibrating the GPS antennas, compare them to their pre-flight calibrations, and evaluate their impact on our POD solutions.

Our presentation also shows results from the evaluation of our GPS-based POD solutions, primarily through independent metrics such as withheld satellite laser ranging data residuals and sea surface height residuals at locations where ascending and descending passes cross (i.e., crossover residuals). We include results from the assessment of our near-real-time (< 5 hours), next-day, and 2-week latency operational orbit solutions. We also assess the relative performance of our GPS-based POD solutions to the medium-accuracy orbit ephemeris (MOE) and precise orbit ephemeris (POE) that are provided on the science data products, as well as POD solutions from other analysis centers. This performance assessment includes both temporal and geographically correlated differences.
 

Oral presentation show times:

RoomStart DateEnd Date
Symphony II Tue, Oct 24 2017,09:30 Tue, Oct 24 2017,09:45
Shailen Desai
Jet Propulsion Laboratory
United States
shailen.desai@jpl.nasa.gov