The powerful Beacon.net integrity monitoring solution comprises a pre-broadcast monitoring (PBM) and a far field monitoring (FFM) module.
PBM verifies that the reference stations are operating according to specifications. The computed differential corrections are checked before they are broadcast to the users. Correction data availability and age, positioning accuracy, satellite specific PRC (Pseudorange Correction) and RRC (Range Rate Correction) residual values, data rate, etc. are monitored in real time. In case any of the monitored parameters exceed pre-defined threshold values (for a given period of time) the PBM module automatically generates a warning message and the software immediately sets the health status of the given satellite or the reference station to “unhealthy”. This way Beacon.net eliminates broadcast of erroneous corrections.
In addition to monitoring DGNSS correction data prior to transmission (Pre-Broadcast Monitoring), at the edge of the beacon transmitter coverage area so-called Far Field Monitor stations are operated. Besides the achievable positioning accuracy, these fixed stations provide information on other characteristics, like “age of correction data, word error rate, signal strength” and correction signal availability for the entire time period.
The web based Far Field Monitoring module gives the DGNSS service operator valuable information on the availability and quality of the service. Warnings are generated when excessive position errors are detected or when additional parameters (e.g., signal strength) exceed defined threshold values.
Some selected features: