ARMA Prediction of SBAS Ephemeris and Clock Corrections for Low Earth Orbiting Satellites
For low earth orbit (LEO) satellite GPS receivers, space-based augmentation system (SBAS) ephemeris/clock corrections can be applied to improve positioning accuracy in real time. The SBAS correction is only available within its service area, and the prediction of the SBAS corrections during the outa...
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | International Journal of Aerospace Engineering |
| Online Access: | http://dx.doi.org/10.1155/2015/165178 |
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| author | Jeongrae Kim Mingyu Kim |
| author_facet | Jeongrae Kim Mingyu Kim |
| author_sort | Jeongrae Kim |
| collection | DOAJ |
| description | For low earth orbit (LEO) satellite GPS receivers, space-based augmentation system (SBAS) ephemeris/clock corrections can be applied to improve positioning accuracy in real time. The SBAS correction is only available within its service area, and the prediction of the SBAS corrections during the outage period can extend the coverage area. Two time series forecasting models, autoregressive moving average (ARMA) and autoregressive (AR), are proposed to predict the corrections outside the service area. A simulated GPS satellite visibility condition is applied to the WAAS correction data, and the prediction accuracy degradation, along with the time, is investigated. Prediction results using the SBAS rate of change information are compared, and the ARMA method yields a better accuracy than the rate method. The error reductions of the ephemeris and clock by the ARMA method over the rate method are 37.8% and 38.5%, respectively. The AR method shows a slightly better orbit accuracy than the rate method, but its clock accuracy is even worse than the rate method. If the SBAS correction is sufficiently accurate comparing with the required ephemeris accuracy of a real-time navigation filter, then the predicted SBAS correction may improve orbit determination accuracy. |
| format | Article |
| id | doaj-art-52ad9f1d31e945a29a3bdbb21ef45e6f |
| institution | Kabale University |
| issn | 1687-5966 1687-5974 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Aerospace Engineering |
| spelling | doaj-art-52ad9f1d31e945a29a3bdbb21ef45e6f2025-02-03T01:11:26ZengWileyInternational Journal of Aerospace Engineering1687-59661687-59742015-01-01201510.1155/2015/165178165178ARMA Prediction of SBAS Ephemeris and Clock Corrections for Low Earth Orbiting SatellitesJeongrae Kim0Mingyu Kim1School of Aerospace and Mechanical Engineering, Korea Aerospace University, Goyang 412-791, Republic of KoreaSchool of Aerospace and Mechanical Engineering, Korea Aerospace University, Goyang 412-791, Republic of KoreaFor low earth orbit (LEO) satellite GPS receivers, space-based augmentation system (SBAS) ephemeris/clock corrections can be applied to improve positioning accuracy in real time. The SBAS correction is only available within its service area, and the prediction of the SBAS corrections during the outage period can extend the coverage area. Two time series forecasting models, autoregressive moving average (ARMA) and autoregressive (AR), are proposed to predict the corrections outside the service area. A simulated GPS satellite visibility condition is applied to the WAAS correction data, and the prediction accuracy degradation, along with the time, is investigated. Prediction results using the SBAS rate of change information are compared, and the ARMA method yields a better accuracy than the rate method. The error reductions of the ephemeris and clock by the ARMA method over the rate method are 37.8% and 38.5%, respectively. The AR method shows a slightly better orbit accuracy than the rate method, but its clock accuracy is even worse than the rate method. If the SBAS correction is sufficiently accurate comparing with the required ephemeris accuracy of a real-time navigation filter, then the predicted SBAS correction may improve orbit determination accuracy.http://dx.doi.org/10.1155/2015/165178 |
| spellingShingle | Jeongrae Kim Mingyu Kim ARMA Prediction of SBAS Ephemeris and Clock Corrections for Low Earth Orbiting Satellites International Journal of Aerospace Engineering |
| title | ARMA Prediction of SBAS Ephemeris and Clock Corrections for Low Earth Orbiting Satellites |
| title_full | ARMA Prediction of SBAS Ephemeris and Clock Corrections for Low Earth Orbiting Satellites |
| title_fullStr | ARMA Prediction of SBAS Ephemeris and Clock Corrections for Low Earth Orbiting Satellites |
| title_full_unstemmed | ARMA Prediction of SBAS Ephemeris and Clock Corrections for Low Earth Orbiting Satellites |
| title_short | ARMA Prediction of SBAS Ephemeris and Clock Corrections for Low Earth Orbiting Satellites |
| title_sort | arma prediction of sbas ephemeris and clock corrections for low earth orbiting satellites |
| url | http://dx.doi.org/10.1155/2015/165178 |
| work_keys_str_mv | AT jeongraekim armapredictionofsbasephemerisandclockcorrectionsforlowearthorbitingsatellites AT mingyukim armapredictionofsbasephemerisandclockcorrectionsforlowearthorbitingsatellites |