OmniSTAR 5220HP, User Manual

Page: 8 / 83

OmniSTAR 5220HP User Manual
Issue 1.32 12/2010
8
Introduction
About This Manual
This manual has been produced to assist the typical user with the installation
and operation of the OmniSTAR 5220HP DGPS Receiver.
System Features
The OmniSTAR 5220HP DGPS Receiver is part of the OmniSTAR worldwide
DGPS Service. The OmniSTAR service is a full-time differential GPS (DGPS)
broadcast
system delivering corrections from an array of GPS reference
stations located around the globe. Reference stations provide industry
standard formatted corrections to Network Control Centres (NCC’s) at strategic
geographic locations, where the corrections are decoded, checked,
and
repackaged in a highly efficient format for broadcast. The data is modulated
onto an RF carrier that is then up-converted for transmission
to an L-band
communications satellite.
The signals are received at the user's location by an antenna, demodulated by
a receiver, and are made available,
after selection of the desired individual
reference site's data set, as corrections for use in a GPS, differential-capable,
receiver.
The OmniSTAR 5220HP receivers support the following OmniSTAR
®
service:
VBS , this is the Virtual Base Station service where single frequency GPS code
and phase measurements are used to create RTCM corrections data
optimised for the users current position.
HP , this is the OmniSTAR High Performance solution using ground reference
stations giving decimetre level accuracy using dual GPS frequency code and
phase measurements
XP , this is the OmniSTAR eXtended Performance solution using precise
satellite orbit and clock corrections giving decimetre level accuracy worldwide
using dual GPS frequency code and phase measurements
HP
+
, this is the combined mode in which corrections from HP and XP are
merged to give one seamless worldwide decimeter level solution.