The Leica AT502 is a dual-frequency  antenna for Leica GPS system 500 which includes the following receivers:

-SR 510

-SR 520

-SR 530

-RS 500

Note: the SR510 is actually a single frequency receiver but works well with AT502 dual-frequency beside the AT501 single-frequency primarily designed for it.

When it comes to the RS 500, I just want to remind this is the CORS in the system 500. CORS stands for Continuously Operating Reference Station. It is the base station that can be set up to be operating 24 hours / 365 days and for as many rovers as you can put out.

Package includes:

1 X Leica AT502 antenna