Image-based approach for satellite visibility analysis in critical environments
- 128 Downloads
The global navigation satellite system (GNSS) positioning solution relies greatly on the satellite configuration visible at a specific receiver location. As a consequence, satellite visibility analysis considering the surrounding terrain obstruction, becomes a key step when the GNSS positioning quality is to be evaluated. Current satellite visibility analysis requires high-resolution digital surface model (DSM) data and is thus a pricey and time-consuming task. In this study, an image-based approach for the satellite visibility analysis is proposed. Terrain obstructions are first identified from photo images, using image-processing techniques. The maximal obstruction angle at each direction is then determined, based on photogrammetric principles. According to the results from a case study, this novel approach provides a satellite visibility analysis solution comparable to that of the current DSM approaches, but with significantly improved computational efficiency. Consequently, a highly efficient and low-cost satellite visibility analysis becomes possible when the proposed approach is implemented.
KeywordsSatellite visibility analysis Global navigation satellite system (GNSS) Dilution of precision (DOP) Image classification Photogrammetric analysis Sky plot
The authors thank the anonymous reviewers for their constructive comments which significantly improved the quality of the original manuscript. The funding support from the Ministry of Science and Technology in Taiwan (under contract No. 103-2221-E-002-128-MY2) is gratefully acknowledged.
- Hofmann-Wellenhof B, Lichtenegger H, Collins J (2011) GPS theory and practice, 5th edn. Springer, New YorkGoogle Scholar
- Hogan MK, Santos MC (2005) Advanced mission planning tool for real-time kinematic (RTK) GPS surveying. In: Proceeding of Institute of Navigation National Technical Meeting, San Diego, 24–26 Jan 2005Google Scholar
- Kleijer F, Odijk D, Verbree E (2009) Prediction of GNSS availability and accuracy in urban environments—case study Schiphol Airport. Lecture notes in geoinformation and cartography, Springer, New York, pp 387–406. doi: 10.1007/978-3-540-87393-8_23
- Leick A (2004) GPS satellite surveying, 3rd edn. Wiley, New YorkGoogle Scholar
- Mikhail EM, Bethel JS, McGlone JC (2001) Introduction to modern photogrammetry. Wiley, New YorkGoogle Scholar
- Misra P, Enge P (2011) Global positioning system: signals, measurements, and performance. Ganga-Jamuna Press, LincolnGoogle Scholar
- Strang G, Borre K (1997) Linear algebra, geodesy, and GPS. Wellesley-Cambridge Press, WellesleyGoogle Scholar
- Zhang K, Liu GJ, Wu F, Densley L, Retscher G (2008) An investigation of the signal performance of the current and future GNSS in typical urban canyons in Australia using a high fidelity 3D urban model. Lecture notes in geoinformation and cartography, Springer, New York, pp 407–420. doi: 10.1007/978-3-540-87393-8_24