| Receivers from various manufacturers are operated in parallel to reduce the characteristic receiver noise error |
| The difference between signals transmitted on the L1 and L2 frequencies are processed by the receiver to determine an error correction |
| Signals from satellites are received by 2 different antennas which are located a fixed distance apart. This enables a suitable receiver on the aircraft to recognise and correct for multipath errors |
| Monitor the orbital planes of the satellites |
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