Raven Viper Pro Installation & Operation Manual page 69

GPS Status Display
The current status of DGPS reception, as well as the current source for differential corrections is displayed in
this area on the main screen.
Note:
This indicator is not necessarily the status of the GPS Receiver or the availability of DGPS
reception.
The DGPS Status Indicator displays a green "thumbs-up" if all required messages are being received and
updated normally. The indicator changes to a red "X" if GPS information is unavailable or the field computer is
not receiving GPS information from the receiver. A yellow "caution" symbol is displayed if the GPS differential
data has not been updated in the last 15 seconds, if the HDOP (Horizontal Dilution of Precision) exceeds 2.0,
or when any other system "cautionary conditions" are met. Touch the GPS Status Indicator to view the GPS
Status screen.
Note:
Touch the DGPS status indicator to display the GPS Status screen. Refer to the GPS Status
Screens section on page 144 for details on using the GPS Status screen.
When connected to a compatible GPS receiver, the Viper Pro will display the source of GPS corrections
currently received. An audible tone will sound anytime the correction source changes. The Viper Pro will
display the following on the Main screen:
•
SBAS - This mode displays with any Satellite Based Augmentation System such as WAAS, CDGPS,
OmniSTAR VBS, etc.
•
OmXP - This mode is displayed with the OmniSTAR XP service selected for deferential corrections.
•
OmHP - This mode is displayed with the OmniSTAR HP service selected for differential corrections.
•
FLT (Float) - This mode indicates that the receiver is not able to provide a full RTK position lock due to the
distance from the base station, visibility of the sky, time of day or interference around the base station
location. In the float mode, the receiver is still providing a course RTK correction signal, but accuracy of the
receiver may not be at a sub-inch level.
•
RTK - This mode indicates that the receiver has a full RTK position fix and is providing sub-inch corrections.
Manual No. 016-0171-122 Rev. I
Initial Set Up and Navigation
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