Trimble Inc. 6999600 用户手册
SNM910 Site-Net Modem Getting Started Guide
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improves the accuracy and availability of the basic GPS
signals over its coverage area, which includes the
continental United States and outlying parts of Canada
and Mexico.
The WAAS system provides correction data for visible
satellites. Corrections are computed from ground station
observations and then uploaded to two geostationary
satellites. This data is then broadcast on the L1
frequency, and is tracked using a channel on the GPS
receiver, exactly like a GPS satellite.
Use WAAS when other correction sources are unavailable,
to obtain greater accuracy than autonomous positions.
For more information on WAAS, refer to the FAA website
at
signals over its coverage area, which includes the
continental United States and outlying parts of Canada
and Mexico.
The WAAS system provides correction data for visible
satellites. Corrections are computed from ground station
observations and then uploaded to two geostationary
satellites. This data is then broadcast on the L1
frequency, and is tracked using a channel on the GPS
receiver, exactly like a GPS satellite.
Use WAAS when other correction sources are unavailable,
to obtain greater accuracy than autonomous positions.
For more information on WAAS, refer to the FAA website
at
is the Japanese equivalent of WAAS.
W GS- 8 4
name.