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Vehicle navigation on a personal navigation assistant Garmin eTrex10 edition handheld. A satellite navigation device or satnav device, also known as a satellite navigation receiver or satnav receiver or simply a GPS device, is a user equipment that uses satellites of the Global Positioning System (GPS) or similar global navigation satellite systems (GNSS).
The L1C pilot and data ranging codes are based on a Legendre sequence with length 10 223 used to build an intermediate code (called a Weil code) which is expanded with a fixed 7-bit sequence to the required 10,230 bits. This 10,230-bit sequence is the ranging code and varies between PRN numbers and between the pilot and data components.
GNSS systems that provide enhanced accuracy and integrity monitoring usable for civil navigation are classified as follows: [5] GNSS-1 is the first generation system and is the combination of existing satellite navigation systems (GPS and GLONASS), with Satellite Based Augmentation Systems (SBAS) or Ground Based Augmentation Systems (GBAS). [5]
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Many vehicle manufacturers offer a satellite navigation device as an option in their vehicles. Customers whose vehicles did not ship with GNSS can therefore purchase and retrofit the original factory-supplied GNSS unit. In some cases this can be a straightforward "plug-and-play" installation if the required wiring harness is already present in ...
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Satellite TMC receivers use a dedicated data channel that is broadcast as part of much larger broadcast digital audio channels. TMC data is decoded by matching event and location codes against look-up tables of phrases and locations. The results can be translated into audio or visually displayed on a Sat nav device. The look-up tables must be ...
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