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This is a list of notable commercial satellite navigation software (also known as GPS software) for various devices, with a specific focus on mobile phones, tablets, tablet PCs, (Android, iOS, Windows).
GPS encodes this information into the navigation message and modulates it onto both the C/A and P(Y) ranging codes at 50 bit/s. The navigation message format described in this section is called LNAV data (for legacy navigation). The navigation message conveys information of three types: The GPS date and time, and the satellite's status.
NEXTAR (from NEC Next Generation Star) is a Low Earth orbit Earth observation satellite bus designed and manufactured by NEC Space Systems of Japan. [ 1 ] [ 2 ] This three axis stabilized platform has a bus dry mass of 250 kg (550 lb), it can carry payloads up to 250 kg (550 lb) and 600 W.
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 GPS Operational Control Segment (OCS), consisting of a worldwide network of satellite operations centers, ground antennas and monitoring stations, provides Command and Control (C2) capabilities for GPS Block II satellites. [60] The latest update to the GPS OCS, Architectural Evolution Plan 7.5, was operationally accepted in 2019. [61]
GPS signals can also be affected by multipath issues, where the radio signals reflect off surrounding terrain; buildings, canyon walls, hard ground, etc. These delayed signals cause measurement errors that are different for each type of GPS signal due to its dependency on the wavelength. [4]
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GPS Measured 2.5 m / 4.7 m The actual measured accuracy of the system (excluding receiver errors), with SA turned off, based on the findings of the FAA's National Satellite Test Bed, or NSTB. WAAS Measured 0.9 m / 1.3 m The actual measured accuracy of the system (excluding receiver errors), based on the NSTB's findings.