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R. G. Brown and P. Y. C. Hwang, “GPS Failure Detection by Autonomous Means Within the Cockpit,” Proceedings of the Annual Meeting of the Institute of Navigation, Seattle, WA, 24-26 June 1986, pp. 5-12.

has been cited by the following article:

• TITLE: Effects of Pseudolite Positioning on DOP in LAAS

  AUTHORS: Quddusa Sultana, Dhiraj Sunehra, Vemuri Satya Srinivas, Achanta Dattatreya Sarma

  KEYWORDS: GPS, Bayes Filter, Kalman Filter, DOP, Pseudolite, LAAS

  JOURNAL NAME: Positioning, Vol.1 No.1, November 26, 2010

  ABSTRACT: In this paper, effects on DOP (Dilution of Precision) due to augmentation of Global Positioning System (GPS) with pseudolites are investigated. For this purpose, a typical Local Area Augmentation System (LAAS) scenario is consi-dered by placing pseudolites in various positions. It is found that only properly located pseudolites can improve the DOP. DOP values with two pseudolites located on either side of the run way are found to be the best. Geometric DOP (max) was found to be nearly 4 due to only GPS and came down to approximately 2 due to augmentation with two pseudolites. Implementation aspects of Bayes and Kalman filters while estimating DOP values are also examined.