Leica Geosystems GPS System 500 - Technical Reference Manual - Manual (Page 13)

13
1. Introduction Technical Reference Manual-4.0.0en
1.2 The GPS Receiver
The GPS Receiver is the instrument
that processes the GPS signals
received by the GPS Antenna.
There are six different models of GPS
receiver in System 500. The model
number is printed on the PC card lid.
See the detailed descriptions of each
of these receivers given down below.
SR510 - Tracks the L1 C/A code and
uses it to reconstruct the carrier
phase. Data can be stored for post-
processing in SKI-Pro. Baselines can
be calculated with a precision of up to
about 5-10mm +2ppm.
With a radio modem attached the
receiver can be used for real-time
measurements accepting RTCM code
corrections. Coordinates can be
calculated with a precision of up to
about 0.5m.
SR520 - Tracks the L1 C/A code and
L2 P-code to reconstruct the carrier
phase. When Anti-Spoofing (A-S) is
activated, the receiver switches to a
patented P-code aided tracking
technique that provides full L2 carrier
measurements and L2
pseudoranges. Data can be stored for
post-processing. Baselines can be
calculated with a precision of up to
about 3-10mm +1ppm.
With a radio modem attached the
receiver can be used for real-time
measurements accepting RTCM
code corrections. Coordinates can be
calculated with a precision of up to
about 0.5m.
SR530 - Tracks the L1 C/A code and
L2 P-code to reconstruct the carrier
phase. When Anti-Spoofing (A-S) is
activated, the receiver switches to a
patented P-code aided tracking
technique that provides full L2 carrier
measurements and L2
pseudoranges. A radio modem
attaches and the receiver can be
used for RTK operations. Coordinates
can be calculated with a precision of
up to about 1cm
Data can also be stored for post-
processing. Baselines can be calcu-
lated with a precision of up to about
3-10mm +1ppm.
System 500 GPS Receivers can be
operated with or without the TR500
Terminal (see section 1.3). The
TR500 is used for field data acquisi-
tion and for configuring the receiver.
Details of using the Receiver without
a Terminal are given in Chapter 3.