Novatel SMART-MR10-GENERIC, Руководство пользователя

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Operation Chapter 3
SMART-MR10 User Manual Rev 0B 41
free of charge. Future developments to this system will encompass the L5 signal.
EGNOS
EGNOS (European Geostationary Navigation Overlay Service) has been developed to work with
existing satellite navigation systems to improve the accuracy of navigation signals. The EGNOS
signal is transmitted by two geostationary satellites and covers all of Europe. EGNOS transmits a
signal containing information on the reliability and accuracy of the positioning signals sent out by
GPS.
ESTB (EGNOS System Test Bed) is a reduced version of EGNOS using dedicated monitoring stations
and processing devices. EGNOS and ESTB are two independent systems making use of their own
ground segment infrastructure and different GEOs. EGNOS and ESTB broadcast two different
signals.
The ESTB is broadcast on PRN (pseudorandom number) 126 and EGNOS is broadcast on PRNs 120
and 124.
Due to the experimental nature of the ESTB, the signals are broadcast without any guarantee of
service.
Use of the ESTB signal is not recommended by NovAtel. Use this command to prevent
tracking PRN 126: WAAS17 0 1 0 126 255 0 0 0 0 0 0 0.
EGNOS entered its pre-operational phase in 2006 and at the time of writing is still in test mode and so
the signal broadcast by the EGNOS satellites (via PRNs 120 & 124) should be used with caution. By
default NovAtel receivers will not use SBAS signals in test mode. If you wish to use these signals you
must issue the following command:
sbascontrol enable egnos 0 zerototwo
More information on the ESTB can be found at http://www.esa.int/estb . More information on EGNOS
can be found at http://www.esa.int/egnos .