| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To enhance the accuracy of abnormality detection of satellites with a ground supplementary satellite navigation system for guiding approach and landing of an aircraft located in an air area within a predetermined distance in the vicinity of an air port. <P>SOLUTION: When a positioning signal propagated beyond an inclined ionospheric layer is found in positioning signals, a pseudo distance correction value correction means (pseudo distance correction value correction section 23a) corrects the signal on pseudo distance correction value corresponding to the positioning signal using an ionospheric layer inclination coefficient, which is represented as a function of an elevation angle with respect to a positioning means (GPS antenna 21, GPS receiver 22) of positioning satellites (GPS satellites 10) to generate calibration statistic amounts. A satellite abnormality detection means (integrity monitor 23b) detects existence of abnormality of the respective GPS satellites 10 using the calibration statistic amounts generated by the pseudo distance correction value correction section 23a. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
