Orbit Determination Using SLR Data for STSAT-2C:Short-arc Analysis
In this study, we present the results of orbit determination (OD) using satellite laser ranging (SLR) data for the Science and Technology Satellite (STSAT)-2C by a short-arc analysis. For SLR data processing, the NASA/GSFC GEODYN II software with one year (2013/04 – 2014/04) of normal point observ...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
The Korean Space Science Society
2015-09-01
|
| Series: | Journal of Astronomy and Space Sciences |
| Subjects: | |
| Online Access: | http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2015/v32n3/OJOOBS_2015_v32n3_189.pdf |
| Summary: | In this study, we present the results of orbit determination (OD) using satellite laser ranging (SLR) data for the Science and
Technology Satellite (STSAT)-2C by a short-arc analysis. For SLR data processing, the NASA/GSFC GEODYN II software
with one year (2013/04 – 2014/04) of normal point observations is used. As there is only an extremely small quantity of SLR
observations of STSAT-2C and they are sparsely distribution, the selection of the arc length and the estimation intervals
for the atmospheric drag coefficients and the empirical acceleration parameters was made on an arc-to-arc basis. For orbit
quality assessment, the post-fit residuals of each short-arc and orbit overlaps of arcs are investigated. The OD results show
that the weighted root mean square post-fit residuals of short-arcs are less than 1 cm, and the average 1-day orbit overlaps
are superior to 50/600/900 m for the radial/cross-track/along-track components. These results demonstrate that OD for
STSAT-2C was successfully achieved with cm-level range precision. However its orbit quality did not reach the same level
due to the availability of few and sparse measurement conditions. From a mission analysis viewpoint, obtaining the results
of OD for STSAT-2C is significant for generating enhanced orbit predictions for more frequent tracking. |
|---|---|
| ISSN: | 2093-5587 2093-1409 |