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| Content Provider | Springer Nature Link |
|---|---|
| Author | Sasibhushana Rao, G. |
| Copyright Year | 2007 |
| Abstract | The positional accuracy of the Global Positioning System (GPS) is limited due to several error sources. The major error is ionosphere. By augmenting the GPS, the Category I (CAT I) Precision Approach (PA) requirements can be achieved. The Space-Based Augmentation System (SBAS) in India is known as GPS Aided Geo Augmented Navigation (GAGAN). One of the prominent errors in GAGAN that limits the positional accuracy is instrumental biases. Calibration of these biases is particularly important in achieving the CAT I PA landings. In this paper, a new algorithm is proposed to estimate the instrumental biases by modelling the TEC using 4th order polynomial. The algorithm uses values corresponding to a single station for one month period and the results confirm the validity of the algorithm. The experimental results indicate that the estimation precision of the satellite-plus-receiver instrumental bias is of the order of ±0.17 nsec. The observed mean bias error is of the order −3.638 nsec and −4.71 nsec for satellite 1 and 31 respectively. It is found that results are consistent over the period. |
| Starting Page | 407 |
| Ending Page | 411 |
| Page Count | 5 |
| File Format | |
| ISSN | 02534126 |
| Journal | Journal of Earth System Science |
| Volume Number | 116 |
| Issue Number | 5 |
| e-ISSN | 0973774X |
| Language | English |
| Publisher | Springer-Verlag |
| Publisher Date | 2007-11-15 |
| Publisher Institution | Indian Academy of Sciences |
| Publisher Place | India |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Instrumental biases Global Positioning System GPS Aided Geo Augmented Navigation Space-Based Augmentation System Extraterrestrial Physics, Space Sciences Geosciences |
| Content Type | Text |
| Resource Type | Article |
| Subject | 1900/1901 |
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