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Whereas the C/A PRNs are unique for each satellite, each satellite transmits a different segment of a master P-code sequence approximately 2.35 x 10 14 chips long (235,000,000,000,000 chips). Each satellite repeatedly transmits its assigned segment of the master code, restarting every Sunday at 00:00:00 GPS time.
OBD-II PIDs (On-board diagnostics Parameter IDs) are codes used to request data from a vehicle, used as a diagnostic tool.. SAE standard J1979 defines many OBD-II PIDs. All on-road vehicles and trucks sold in North America are required to support a subset of these codes, primarily for state mandated emissions inspections.
USA-64, also known as GPS II-9 and GPS SVN-15, was an American navigation satellite which formed part of the Global Positioning System. It was the last of nine Block II GPS satellites to be launched, which were the first operational GPS satellites to fly. It was also the last Block II satellite to be retired from service.
Scout for Apps is a HTML5, browser-based, voice-guided turn-by-turn GPS navigation service for mobile phones. [16] The free service for mobile web and app developer, offers the ability to include turn-by-turn, voice-guided GPS navigation within their mobile app or website. Developers can integrate the service by adding one line of code.
Binary offset carrier modulation [1] [2] (BOC modulation) was developed by John Betz in order to allow interoperability of satellite navigation systems. It is currently used in the US GPS system, Indian IRNSS system and in Galileo [3] and is a square sub-carrier modulation, where a signal is multiplied by a rectangular sub-carrier of frequency equal to or greater than the chip rate.
A Selective Availability Anti-spoofing Module (SAASM) is used by military Global Positioning System receivers to allow decryption of precision GPS observations, while the accuracy of civilian GPS receivers may be reduced by the United States military through Selective Availability (SA) and anti-spoofing (AS). [1]
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Navigation software for use on the water has many features in common with land-based GNSS navigation software. It can use electronic navigation chart or raster charts, usually provides user ability to plan routes and set waypoints, and may have live GPS tracking capabilities.