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DGNSS Systems
| Fundamentals | |
|---|---|
| Title | DGNSS Systems |
| Author(s) | GMV |
| Level | Basic |
| Year of Publication | 2011 |
DGNSS Systems
For instance, the United States Coast Guard and Canadian Coast Guard run one such system in the US and Canada on the longwave radio frequencies between 285 kHz and 325 kHz. These frequencies are commonly used for marine radio, and are broadcast near major waterways and harbors. Australia runs two DGPS systems: one is mainly for marine navigation, run by Australian Maritime Safety Authority, broadcasting its signal on the longwave band; the other is used for land surveys and land navigation, and has corrections broadcast on the Commercial FM radio band.[1]
There are other DGNSS techniques used by high-precision navigation/surveying applications, based on the use of carrier phase measurements. These are the cases of the Real Time Kinematic (RTK) and the Wide Area RTK (WARTK), where the differential GPS measurements are computed in real-time by specific GPS receivers if they receive a correction signal using a separate radio receiver.
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