Airmar WeatherCaster™ Software - Manual (Page 41)

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• GPS Position Calculations—To calculate a more accurate 2D fix, an altitude
offset can be programed into the sensor. Enter an altitude in the Fixed Altitude
field. Select Use Fixed Altitude Until 3D Fix Acquired.
• MDA Barometric Pressure Options—You can enable correcting for altitude
when the altitude is not available due to the GPS not having a 3D fix. Enter an
altitude in the Fixed Altitude field. Select Use Fixed Altitude When GPS Altitude
Unavailable.
For more information, click Help. To accept the change(s), click Save.
GPS (see Figure 46)
• GPS Options—It is possible to restrict the operation of the GPS to only allow
3D fixes. By selecting Use 3D Fix Only, the sensor will not report a fix until it has
achieved a 3D fix. To re-enable the automatic selection of 2D versus 3D fix
calculations, click the Automatically Select 2D/3D Fixes button.
• WAAS Options—If the internal GPS receiver is WAAS enabled, the WAAS
options will be available. WAAS enabled GPS receivers utilize the Wide Area
Augmentation System to provide more accurate positioning data. Select either
the Disable or Enable Report Fixes As Differential button.
For more information, click Help. To accept the change(s), click Save.
Figure 46. GPS options window