Leica Geosystems GPS System 500 - Technical Reference Manual - Manual (Page 12)

12 1. Introduction Technical Reference Manual-4.0.0en
1.1 The GPS Antenna
There are several System 500 GPS
Antennas available. These are:
• AT501 Single Frequency Antenna.
• AT502 Dual Frequency Antenna.
• AT503 Dual Frequency Choke
Ring Antenna.
• AT504 JPL Design Dual Fre-
quency Choke Ring Antenna.
• Single Frequency Choke Ring
Antenna.
The GPS Antenna is selected for use
based upon the application. The vast
majority of applications will require
the AT501 or AT502 Antenna.
The AT501 is a L1 single frequency
antenna. Use it with the SR510
Receiver. The AT502 is a dual fre-
quency antenna. Use it with the
SR520 or SR530 Receiver.
The Choke Ring Antennas are
designed for use where the utmost
precision is required. Typical applica-
tions include Static Surveys of long
baselines, Tectonic Plate monitoring,
Reference Stations, etc.
Use the AT503 and AT504 with the
SR520 or SR530 Receiver. Use the
Single Frequency Choke Ring with
the SR510 Receiver.
AT502 Antenna
AT504 Antenna
Also available is a combined GPS/
RTB or GPS/ RTS antenna. Refer to
Appendix K for further information.