Details
| Original language | English |
|---|---|
| Publication status | Published - 2019 |
| Event | EGU General Assembly 2019 - Vienna, Wien, Austria Duration: 7 Apr 2019 → 12 Apr 2019 https://egu2019.eu/ |
Conference
| Conference | EGU General Assembly 2019 |
|---|---|
| Country/Territory | Austria |
| City | Wien |
| Period | 7 Apr 2019 → 12 Apr 2019 |
| Internet address |
Abstract
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2019. Poster session presented at EGU General Assembly 2019, Wien, Austria.
Research output: Contribution to conference › Poster › Research
}
TY - CONF
T1 - Mitigation of ionospheric effects on Swarm GPS observations and kinematic orbits
AU - Ren, Le
AU - Lück, Christina
AU - Kermarrec, Gael
AU - Schön, Steffen
AU - Rietbroek, Roelof
AU - Kusche, Jürgen
PY - 2019
Y1 - 2019
N2 - The Swarm mission launched on November 22, 2013 consists of three identical satellites in near-polar orbits, Swarm A and C flying almost side-by-side at an initial altitude of 460 km, Swarm B flying in a higher orbit of about 530 km. Each satellite is equipped with a high precision 8-channels dual-frequency GPS receiver for precise orbit determination. This also offers excellent opportunities to study the ionosphere and to provide temporal gravity field information derived from the kinematic orbits of the satellites for the gap between the Gravity Recovery and Climate Experiment (GRACE) and its follow-on mission (GRACE-FO). However, observations from on-board GPS receiver are strongly disturbed by ionospheric scintillations, which degrades the kinematic orbits at the geomagnetic equator and at polar areas and thus the gravity field. Due to the different property of ionospheric scintillations, the GPS carrier phase observations suffer also from different types of disturbances. In this contribution, in order to improve the quality of the kinematic orbits, we propose a new method to filter the high-frequency noise and repair the systematic errors in the phase observations, instead of eliminating or down-weighting the disturbed observations. The kinematic orbits and derived gravity field can be significantly improved. The systematic errors along the geomagnetic equator bands in the gravity field are also successfully eliminated.
AB - The Swarm mission launched on November 22, 2013 consists of three identical satellites in near-polar orbits, Swarm A and C flying almost side-by-side at an initial altitude of 460 km, Swarm B flying in a higher orbit of about 530 km. Each satellite is equipped with a high precision 8-channels dual-frequency GPS receiver for precise orbit determination. This also offers excellent opportunities to study the ionosphere and to provide temporal gravity field information derived from the kinematic orbits of the satellites for the gap between the Gravity Recovery and Climate Experiment (GRACE) and its follow-on mission (GRACE-FO). However, observations from on-board GPS receiver are strongly disturbed by ionospheric scintillations, which degrades the kinematic orbits at the geomagnetic equator and at polar areas and thus the gravity field. Due to the different property of ionospheric scintillations, the GPS carrier phase observations suffer also from different types of disturbances. In this contribution, in order to improve the quality of the kinematic orbits, we propose a new method to filter the high-frequency noise and repair the systematic errors in the phase observations, instead of eliminating or down-weighting the disturbed observations. The kinematic orbits and derived gravity field can be significantly improved. The systematic errors along the geomagnetic equator bands in the gravity field are also successfully eliminated.
U2 - 10.15488/4680
DO - 10.15488/4680
M3 - Poster
T2 - EGU General Assembly 2019
Y2 - 7 April 2019 through 12 April 2019
ER -