The Effect of Equatorial Spread F on Relative Orbit Determination of GRACE Using Differenced GPS Observations
In this paper, relative orbit of Low Earth Orbit satellites is determined using only GPS measurements and the effects of Equatorial Spread-F (ESF), that is one of biggest ionospheric irregularities, are investigated. First, relative orbit determiation process is constructed based on doubly differ...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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The Korean Space Science Society
2009-12-01
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| Series: | Journal of Astronomy and Space Sciences |
| Subjects: | |
| Online Access: | http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2009/v26n4/OJOOBS_2009_v26n4_499.pdf |
| _version_ | 1797330746424164352 |
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| author | Kyoung-Min Roh Hermann Luehr Sang-Young Park Jung-Ho Cho |
| author_facet | Kyoung-Min Roh Hermann Luehr Sang-Young Park Jung-Ho Cho |
| author_sort | Kyoung-Min Roh |
| collection | DOAJ |
| description | In this paper, relative orbit of Low Earth Orbit satellites is determined using only GPS
measurements and the effects of Equatorial Spread-F (ESF), that is one of biggest
ionospheric irregularities, are investigated. First, relative orbit determiation process
is constructed based on doubly differenced GPS observations. In order to see orbit
determination performance, relative orbit of two GRACE satellites is estimated for
one month in 2004 when no ESF is observed. The root mean square of the achieved
baselines compared with that from K-Band Ranger sensor is about 2 ~ 3 mm and average of 95% of ambiguities are resolved. Based on this performance, the relative
orbit is estimated for two weeks of two difference years, 2003 when there are lots
of ESF occurred, and 2004 when only few ESF occurred. For 2003, the averaged
baseline error over two weeks is about 15 mm. That is about 4 times larger than the
case of 2004 (3.6 mm). Ionospheric status achieved from K-Band Ranging sensor also
shows that more Equatorial Spread-F occurred at 2003 than 2004. Investigation on
raw observations and screening process revealed that the ionospheric irregualarities
caused by Equatorial Spread-F gave significant effects on GPS signal like signal loss
or enhancement ionospheric error, From this study, relative orbit determination using
GPS observations should consider the effect of Equatorial Spread-F and adjust orbit
determination strategy, especially at the time of solar maximum. |
| first_indexed | 2024-03-08T07:24:58Z |
| format | Article |
| id | doaj.art-2c93e72fa4e743f2a6f8eb46be3eac26 |
| institution | Directory Open Access Journal |
| issn | 2093-5587 2093-1409 |
| language | English |
| last_indexed | 2024-03-08T07:24:58Z |
| publishDate | 2009-12-01 |
| publisher | The Korean Space Science Society |
| record_format | Article |
| series | Journal of Astronomy and Space Sciences |
| spelling | doaj.art-2c93e72fa4e743f2a6f8eb46be3eac262024-02-02T22:13:16ZengThe Korean Space Science SocietyJournal of Astronomy and Space Sciences2093-55872093-14092009-12-0126449951010.5140/JASS.2009.26.4.499The Effect of Equatorial Spread F on Relative Orbit Determination of GRACE Using Differenced GPS ObservationsKyoung-Min Roh0Hermann Luehr1Sang-Young Park2Jung-Ho Cho3Korea Astronomy and Space science Institute, Daejeon 305-348, KoreaHelmholtz Center Potsdam, GFZ German Research Center for GeosciencesAstrodynamics & Control Lab., Dept. Astronomy, Yonsei Univ., Seoul 120-749, KoreaKorea Astronomy and Space science Institute, Daejeon 305-348, KoreaIn this paper, relative orbit of Low Earth Orbit satellites is determined using only GPS measurements and the effects of Equatorial Spread-F (ESF), that is one of biggest ionospheric irregularities, are investigated. First, relative orbit determiation process is constructed based on doubly differenced GPS observations. In order to see orbit determination performance, relative orbit of two GRACE satellites is estimated for one month in 2004 when no ESF is observed. The root mean square of the achieved baselines compared with that from K-Band Ranger sensor is about 2 ~ 3 mm and average of 95% of ambiguities are resolved. Based on this performance, the relative orbit is estimated for two weeks of two difference years, 2003 when there are lots of ESF occurred, and 2004 when only few ESF occurred. For 2003, the averaged baseline error over two weeks is about 15 mm. That is about 4 times larger than the case of 2004 (3.6 mm). Ionospheric status achieved from K-Band Ranging sensor also shows that more Equatorial Spread-F occurred at 2003 than 2004. Investigation on raw observations and screening process revealed that the ionospheric irregualarities caused by Equatorial Spread-F gave significant effects on GPS signal like signal loss or enhancement ionospheric error, From this study, relative orbit determination using GPS observations should consider the effect of Equatorial Spread-F and adjust orbit determination strategy, especially at the time of solar maximum.http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2009/v26n4/OJOOBS_2009_v26n4_499.pdfDGPSorbit determinationequatorial spread F |
| spellingShingle | Kyoung-Min Roh Hermann Luehr Sang-Young Park Jung-Ho Cho The Effect of Equatorial Spread F on Relative Orbit Determination of GRACE Using Differenced GPS Observations Journal of Astronomy and Space Sciences DGPS orbit determination equatorial spread F |
| title | The Effect of Equatorial Spread F on Relative Orbit Determination of GRACE Using Differenced GPS Observations |
| title_full | The Effect of Equatorial Spread F on Relative Orbit Determination of GRACE Using Differenced GPS Observations |
| title_fullStr | The Effect of Equatorial Spread F on Relative Orbit Determination of GRACE Using Differenced GPS Observations |
| title_full_unstemmed | The Effect of Equatorial Spread F on Relative Orbit Determination of GRACE Using Differenced GPS Observations |
| title_short | The Effect of Equatorial Spread F on Relative Orbit Determination of GRACE Using Differenced GPS Observations |
| title_sort | effect of equatorial spread f on relative orbit determination of grace using differenced gps observations |
| topic | DGPS orbit determination equatorial spread F |
| url | http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2009/v26n4/OJOOBS_2009_v26n4_499.pdf |
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