The UHARS Non-GPS Based Positioning System (NGBPS)

摘要

Amid a growing concern about Global Positioning System (GPS) jamming in military areas of operation, testing GPS receivers and antenna systems in a GPSdenied environment is becoming increasingly important to Department of Defense (DoD) agencies. However, since GPS is often the "gold standard" position, navigation and time information that serves as a truth reference during field and flight testing, conducting tests in an area that has no GPS availability because of intense jamming makes it difficult to compare observed position and navigation data to a valid truth source. Moreover, to evaluate system performance with appropriate statistical significance, the reference system against which test results are measured needs to be significantly more accurate than the system under test. Therefore, when the system under test is GPS itself, this poses an interesting problem.