Details
| Originalsprache | Englisch |
|---|---|
| Titel des Sammelwerks | 2012 European Frequency and Time Forum |
| Seiten | 157-160 |
| Seitenumfang | 4 |
| Publikationsstatus | Veröffentlicht - 13 Juni 2013 |
| Veranstaltung | 2012 European Frequency and Time Forum, EFTF 2012 - Gothenburg, Schweden Dauer: 23 Apr. 2012 → 27 Apr. 2012 |
Abstract
Kinematic orbit positions of Low Earth Orbiting satellites (LEOs) derived from GPS observations are frequently used for single satellite gravity field recovery. Unfortunately, the precision of the kinematic coordinates is compromised by the estimation of the receiver clock synchronization offset in addition to the three kinematic coordinates for every observation epoch. In this paper the potential of receiver clock modeling to improve the precision of the kinematic orbit determination is investigated. The formation flying twin satellites of the Gravity Recovery And Climate Experiment (GRACE) mission are considered as a case study. A unique feature of these satellites is the combination of a dual frequency GPS receiver with an Ultra Stable Oscillator (USO), that provides the required frequency stability for the proposed clock modeling approach. Based on a piece-wise linear clock parametrization with 60 s intervals, a significant reduction of the high-frequency radial orbit differences with respect to a reduced-dynamic orbit is shown.
ASJC Scopus Sachgebiete
- Physik und Astronomie (insg.)
- Akustik und Ultraschall
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2012 European Frequency and Time Forum. 2013. S. 157-160.
Publikation: Beitrag in Buch/Bericht/Sammelwerk/Konferenzband › Aufsatz in Konferenzband › Forschung › Peer-Review
}
TY - GEN
T1 - Improved GPS receiver clock modeling for kinematic orbit determination of the GRACE satellites
AU - Weinbach, Ulrich
AU - Schön, Steffen
PY - 2013/6/13
Y1 - 2013/6/13
N2 - Kinematic orbit positions of Low Earth Orbiting satellites (LEOs) derived from GPS observations are frequently used for single satellite gravity field recovery. Unfortunately, the precision of the kinematic coordinates is compromised by the estimation of the receiver clock synchronization offset in addition to the three kinematic coordinates for every observation epoch. In this paper the potential of receiver clock modeling to improve the precision of the kinematic orbit determination is investigated. The formation flying twin satellites of the Gravity Recovery And Climate Experiment (GRACE) mission are considered as a case study. A unique feature of these satellites is the combination of a dual frequency GPS receiver with an Ultra Stable Oscillator (USO), that provides the required frequency stability for the proposed clock modeling approach. Based on a piece-wise linear clock parametrization with 60 s intervals, a significant reduction of the high-frequency radial orbit differences with respect to a reduced-dynamic orbit is shown.
AB - Kinematic orbit positions of Low Earth Orbiting satellites (LEOs) derived from GPS observations are frequently used for single satellite gravity field recovery. Unfortunately, the precision of the kinematic coordinates is compromised by the estimation of the receiver clock synchronization offset in addition to the three kinematic coordinates for every observation epoch. In this paper the potential of receiver clock modeling to improve the precision of the kinematic orbit determination is investigated. The formation flying twin satellites of the Gravity Recovery And Climate Experiment (GRACE) mission are considered as a case study. A unique feature of these satellites is the combination of a dual frequency GPS receiver with an Ultra Stable Oscillator (USO), that provides the required frequency stability for the proposed clock modeling approach. Based on a piece-wise linear clock parametrization with 60 s intervals, a significant reduction of the high-frequency radial orbit differences with respect to a reduced-dynamic orbit is shown.
UR - http://www.scopus.com/inward/record.url?scp=84877635341&partnerID=8YFLogxK
U2 - 10.1109/EFTF.2012.6502356
DO - 10.1109/EFTF.2012.6502356
M3 - Conference contribution
AN - SCOPUS:84877635341
SN - 9781467319249
SP - 157
EP - 160
BT - 2012 European Frequency and Time Forum
T2 - 2012 European Frequency and Time Forum, EFTF 2012
Y2 - 23 April 2012 through 27 April 2012
ER -