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For long delay multipath, the receiver itself can recognize the wayward signal and discard it. To address shorter delay multipath from the signal reflecting off the ground, specialized antennas (e.g., a choke ring antenna) may be used to reduce the signal power as received by the antenna. Short delay reflections are harder to filter out because ...
A pseudorange that differs significantly from the expected value (i.e., an outlier) may indicate a fault of the associated satellite or another signal integrity problem (e.g., ionospheric dispersion). Traditional RAIM uses fault detection (FD) only, however newer GPS receivers incorporate fault detection and exclusion (FDE) which enables them ...
You may improve this article, discuss the issue on the talk page, or create a new article, as appropriate. ( June 2024 ) ( Learn how and when to remove this message ) Time to first fix ( TTFF ) is a measure of the time required for a GPS navigation device to acquire satellite signals and navigation data, and calculate a position solution ...
A broadcast signal intrusion is the hijacking of broadcast signals of radio, television stations, cable television broadcast feeds or satellite signals without permission or licence. Hijacking incidents have involved local TV and radio stations as well as cable and national networks.
ARINC 771 is the standard for the second-generation L-Band satellite data unit, also called Certus Broadband for the low Earth orbit (LEO) Iridium NEXT by operator Iridium; ARINC 781 is the standard for a third-generation L-band satellite data unit, also called SwiftBroadband (SBB) by operator Inmarsat
Until the creation of the Tracking and Data Relay Satellite System (TDRSS), the Space Shuttle endured a 30-minute blackout. The TDRSS allowed the Shuttle to communicate by relay with a Tracking and Data Relay Satellite during re-entry, through a "hole" in the ionized air envelope at the tail end of the craft, created by the Shuttle's shape. [1]
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The GPS week number rollover is a phenomenon that happens every 1,024 weeks, which is about 19.6 years. The Global Positioning System (GPS) broadcasts a date, including a week number counter that is stored in only ten binary digits, whose range is therefore 0–1,023.