Assessment of individual and combined gravity field solutions from Swarm GPS data and mitigation of systematic errors

Adrian Jäggi (Speaker), Ulrich Meyer (Contributor), Lucas Schreiter (Contributor), Veerle Sterken (Contributor), Christoph Dahle (Contributor), Daniel Arnold (Contributor), João De Teixeira da Encarnação (Contributor), P.N.A.M. Visser (Contributor), Jose van den IJssel (Contributor), Xinyuan Mao (Contributor), Elisabetta Iorfida (Contributor), Bezdek Ales (Contributor), Josef Sebera (Contributor), Norbert Zehentner (Contributor), Mayer-Gürr, T. (Contributor), C.K. Shum (Contributor), Christina Lück (Contributor), Roloef Rietbroek (Contributor), Jürgen Kusche (Contributor)

Activity: Talk or presentationTalk at conference or symposiumScience to science

Description

Although ESA’s Earth Explorer Mission Swarm is primarily dedicated to measure the Earth’s magnetic field,
it currently also serves as a gravity field mission. Equipped with GPS receivers, accelerometers, star-tracker
assemblies and laser retro-reflectors, the three Swarm satellites provide the necessary instrumentation to be
used as a high-low satellite-to-satellite tracking (hl-SST) observing system. Since GRACE-B, one of the two
satellites of the GRACE mission dedicated to measure the time-variability of the Earth’s gravity field, has been
decommissioned on 12 Oct 2017, Swarm is now in the focus to close the gap between the GRACE and its
Follow-On (GRACE-FO) mission.
In this presentation we will report the current state of Swarm gravity field determination as performed at
various analysis centers. Besides the individual contributions we will also present combined Swarm solutions
computed by the scientific combination service established in the frame of the European Gravity Service for
Improved Emergency Management (EGSIEM) initiative. Besides this, we will assess the various efforts made to
mitigate systematic errors in the Swarm Level-1B GPS data related to ionospheric activity that are affecting the
Swarm gravity field solutions.
Period9 Apr 2018
Held atEGU General Assembly 2018
Event typeConference
LocationWien, Austria
Degree of RecognitionInternational