Jason-2 Orbit Determination With GPS, Instrument Status And Reference Frame Sensitivity

Willy Bertiger (JPL, United States)


Shailen Desai (JPL, United States); Angie Dorsey (JPL, United States); Bruce Haines (JPL, United States); Felix Landerer (JPL, United States); Mike Heflin (JPL, United States); Aurore Sibois (JPL, United States); David Wiese (JPL, United States); Dah-Ning Yuan (JPL, United States)

Event: 2015 Ocean Surface Topography Science Team Meeting

Session: Precision Orbit Determination

Presentation type: Type Oral

In August 2014, the GPS receiver, GPSP-A, stopped outputting data and Jason-2 switched to the redundant instrument, GPSP-B. The GPSP-B had some differences in software and configuration. Over the past year, the software and configuration have been modified. We will discuss its current status and performance. Internal metrics show a slight degradation relative to the GPSP-A instrument.

With the pending release of ITRF2014, we will asses the impact of the newer reference frame on the long-term stability of the Jason-2 orbit with respect to altimetry measurements. To do this, we will test one or two reference frames constructed using modernized GIPSY software coupled with annual terms for geocenter motion. Test frames will be built using sinex files submitted as input for ITRF2014 from DORIS, GPS, SLR, and VLBI as well as ties between the techniques. We will apply appropriate frame and geocenter constraints to GPS orbit and clock solutions as they would be delivered to the IGS for the IGS final products, producing a Jason-2 precision orbit determination time series for each test frame. Long-term statistics from altimeter cross-overs and satellite laser ranging to Jason-2 will be used to assess the impact of reference frame choice.

Oral presentation show times:

RoomStart DateEnd Date
Grand Ballroom 1 Wed, Oct 21 2015,09:45 Wed, Oct 21 2015,10:00
Willy Bertiger
United States