Improvement of Position Accuracy with GAGAN and the Impact of Scintillation on GNSS
Improvement of Position Accuracy with GAGAN and the Impact of Scintillation on GNSS作者机构：Airports Authority of India Ahmedabad India Airports Authority of India New Delhi India Department of Physics M. L. S. University Udaipur India Space Applications Centre Ahmedabad India
出 版 物：《Positioning》 (导航（英文）)
年 卷 期：2013年第4卷第4期
页 面：282-288页
学科分类：1002[医学-临床医学] 100214[医学-肿瘤学] 10[医学]
主 题：GAGAN SBAS Position Scintillation GPS
摘 要：GAGAN is an Indian implementation of Satellite Based Augmentation System (SBAS), developed jointly by Airports Authority of India (AAI) and Indian Space Research Organisation (ISRO). It is in final operational phase with all the required ground and space segments ready. With the availability of GAGAN signal-in-space (SIS), the improvement in position solution is investigated using the two collocated dual frequency GPS receivers. One of the receivers was configured as SBAS receiver and the other was kept as GPS stand-alone receiver. It is found that accuracy in position improved significantly in SBAS receiver due to GAGAN correction. The impact of scintillation on GNSS was also investigated in terms of position degradation and loss of lock of the satellite signals. The manyfold effects of scintillation on GPS and SBAS are discussed in detail. The results indicate ~15% reduction in number of measurements due to loss of lock during severe scintillation.
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