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In near future, there will be two more civilian GPS signals,at 1227.60 MHz and 1176.45 MHz, in addition to thepresent one at 1575.42 MHz. Of many possible benefits from the three civilian signal...
Since GPS signals have very low received power levels (−130 dBm, or −160 dBW), their vulnerability to RF Interference (RFI) is a serious concern. This is particularly true for GPS-based sa...
Both WAAS and LAAS receivers use carrier-smoothing filters to reduce the effects of multipath and thermal noise at the aircraft. For the majority of users this reduces the magnitude of the errors and ...
Several severe ionosphere storms have occurred in recent years that tripped the WAAS storm detector and caused partial WAAS service shutdowns. Under extreme conditions, these spatial gradients can thr...

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