Справочник Пользователя для Novatel OM-20000077

Data may be requested for output by the receiver for display or logging purposes. The list of data request 
commands and data messages is detailed in the L1 GPS Firmware Reference Manual.

Several parameters of the receiver and the base station are configurable and therefore, you must define them 
prior to operation.

 Your receiver must be a BASE model to act as a base station. A list of models is in Appendix A of the L1 

GPS Firmware Reference Manual and in our Price List available from the Sales side menu of our website 
at 

www.novatel.com

.

The mask angle is defined as the minimum satellite elevation angle (in degrees) above which any given satellite 
must be in order for it to be used in the GPS position solution. Low satellites usually do not yield accurate 
measurements due to weak signal reception and possible multipath. Typical mask angle values range from 5

°-

10

°, depending on the receiver’s location. This value is programmable using command Message ID# 81, Set 

Mask Angle.

For the base station, it is imperative to fix the position. This can be done using either the X-Y-Z coordinates in 
meters within the WGS-84 reference frame, or latitude and longitude in degrees and height in meters (LLH 
coordinates) by selecting Tool Setting | Set Operating Mode in the main menu of StarView. 

You can also set the X-Y-Z coordinates using Message ID# 80, Set User’s Position/Operating Mode.

The receiver’s non-operational state is OFF mode. In OFF mode, only the data contained in the NVM is 
retained for use when power is re-applied. See Section 3.5, Protocol Selection and Non Volatile Memory 
starting on Page 24 for details on retained data. A supercap allows the SUPERSTAR II to maintain data and 
time during OFF mode for a period of 3 days to a week.

The receiver has 6 operating modes: 

•

Self-Test

•

Initialization

•

Acquisition

•

Navigation

•

Dead-Reckoning

•

Fault