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4 GPS
36 CONTENTS TH-D72A/E
The distance from the current location to the Target Point can be confirmed in the Target Point
screen. Target Point display is the third page from the Latitude Longitude display reached by
repeatedly pressing the [OK] key. However, if no GPS data is positioned by GPS, “Finding GPS
satellites…” screen appears, and, therefore, you cannot switch to the Target Point screen. Pressing
the [F] key in the Target Point screen toggles between North Up and Heading Up.
SBAS (Satellite-Based Augmentation System) is a collective term given to the technologies to correct
GPS errors using geostationary satellites.
SBAS is referred to as WAAS (Wide Area Augmentation System) for the USA, as EGNOS (European
Geostationary Navigation Overlay Service) for Europe and as MSAS (MTSAT Satellite-based
Augmentation System) for Japan.
To configure SBAS, go to Menu 212 (GPS - Setup - SBAS). Note, however, that you cannot
configure the SBAS function to be enabled if anything other than OFF is configured for Battery Save
in Menu 201 (GPS - Int. GPS - Batt.Saver).
Figure 4-30 SBAS Menu
Note:
While SBAS is active, ensure that the sky is not obstructed in the direction of the SBAS satellite during the positioning.
Upon receipt of a signal from WAAS, the satellite number “35”, “47”, “48”, “51”, or “34” appears in the GPS satellite information
screen.
Upon receipt of a signal from EGNOS, the satellite number “33”, “37”, “44”, or “39” appears in the GPS satellite information
screen.
Upon receipt of a signal from MTSAT, the satellite number “42” or “50” appears in the GPS satellite information screen.
The signal from satellites that are located in a geostationary orbit is weaker and more difficult to capture than the signals of
other GPS satellites, and therefore, positioning takes longer length of time.
Information regarding whether or not the data received from an SBAS satellite is used for computation in the GPS unit is not
displayed.
Turning on the SBAS function does not guarantee that the margin of positioning error becomes smaller.
4.3.11 SBAS
[F]
North Up Screen Heading Up Screen