A new time series of orbits (std1504) for TOPEX/Poseidon, Jason-1, Jason-2 (OSTM)

Frank Lemoine (NASA GSFC, United States)

CoAuthors

Nikita Zelensky (SGT Inc., USA); Douglas Chinn (SGT Inc, USA); Brian Beckley (SGT Inc, USA); David Rowlands (NASA GSFC, USA); Despina Pavlis (SGT Inc, USA)

Event: 2015 Ocean Surface Topography Science Team Meeting

Session: Precision Orbit Determination

Presentation type: Type Oral

The Jason-2 (OSTM) spacecraft has now been in orbit for seven years (since June 2008),
and the full set of altimeter data from TOPEX/Poseidon, Jason-1, and Jason-2 now span more than twenty-three years. In order to properly use the altimeter data, especially for the most demanding applications such as the determination of mean sea level, we must
develop a time series of precise orbits that are as accurate as possible over the entire
time span, using a consistent set of modeling and geophysical standards. In this
paper, we give an overview on the improvements we have incorporated into our latest
release of orbits, std1504, which include application of the Vienna Mapping Function
(VMF) to better correct the DORIS data for tropospheric refraction, improvement to the
background geopotential modeling to account for the recent changes in the time-variable
gravity field of the Earth, and improved measurement modeling for the DORIS
measurement. We discuss the impact of improved non-conservative force modeling we have applied to the Jason-1 and Jason-2 satellites and the improvements we see in comparison to reduced-dynamic orbits. Our evaluations include analysis of the sea-surface-height differences during the Jason-1/Jason-2 and the TOPEX/Jason-1 calibration periods. We also present an update on our preparations for Jason-3, including our readiness to process the DORIS/RINEX data expected to be routinely delivered Jason-3, and all future DORIS-equipped missions
 

Oral presentation show times:

RoomStart DateEnd Date
Grand Ballroom 1 Wed, Oct 21 2015,09:25 Wed, Oct 21 2015,09:40
Frank Lemoine
NASA GSFC
United States
Frank.G.Lemoine@nasa.gov