Waypoint GrafMov

Moving Baseline Processing and Heading Determination

The moving baseline module allows for GPS post-processing between two moving platforms. By processing directly between two moving kinematic objects, the accuracy of the relative trajectory can be improved significantly over that of a stationary base. This is especially true if the base station distance is much larger than the relative distance. If the two antennae are fix mounted, then heading can also be computed. The Moving Baseline module (called GrafMov) is purchased as an upgrade to GrafNav/GrafNet™, and some of its additional features are:

• Relative Processing - All of the advanced features of GrafNav including KAR, reliable Kalman Filter, forward/reverse/combined processing, dual and single frequency, and fast processing speed are all supported.
  
  
• Relative Vector Output - GrafMov can export a number of relative vectors including local level, ECEF, and range and bearing.
  
  
• Relative Velocity - Not only is the relative position available, the instantaneous differential velocity vector is also computed.
  
  
• Heading Determination - For applications that require heading, GrafMov's fast integer ambiguity resolution algorithm (i.e. KAR) can make use of the antenna separation to further the speeding up of initialization times. Pitch can be computed from the relative vector output.