TH-D72A/E - N3UJJ

4 GPSThe distance from the current location to the Target Point can be confirmed in the Target Pointscreen. Target Point display is the third page from the Latitude Longitude display reached byrepeatedly pressing the [OK] key. However, if no GPS data is positioned by GPS, “Finding GPSsatellites…” screen appears, and, therefore, you cannot switch to the Target Point screen. Pressingthe [F] key in the Target Point screen toggles between North Up and Heading Up.[F]North Up ScreenHeading Up Screen4.3.11 SBASSBAS (Satellite-Based Augmentation System) is a collective term given to the technologies to correctGPS errors using geostationary satellites.SBAS is referred to as WAAS (Wide Area Augmentation System) for the USA, as EGNOS (EuropeanGeostationary Navigation Overlay Service) for Europe and as MSAS (MTSAT Satellite-basedAugmentation System) for Japan.To configure SBAS, go to Menu 212 (GPS - Setup - SBAS). Note, however, that you cannotconfigure the SBAS function to be enabled if anything other than OFF is configured for Battery Savein Menu 201 (GPS - Int. GPS - Batt.Saver).Figure 4-30 SBAS MenuNote: 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 informationscreen. Upon receipt of a signal from EGNOS, the satellite number “33”, “37”, “44”, or “39” appears in the GPS satellite informationscreen. 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 ofother 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 notdisplayed. Turning on the SBAS function does not guarantee that the margin of positioning error becomes smaller.36 CONTENTS TH-D72A/EFrom The N3UJJ.COM Document Library