with and with out the Zephyr model 1. I blocked the internal antenna as shown in the photos.data with the Zephyr model 1it appears that the GPS L2C si...

> I own a ProXRT with a zephyr2 with GLONASS and I used to own a ProXH with a zephyr1. I never saw GLONASS with the zephyr1. > > I am pretty ...

absolutely 100% positive the Zephyr 1 is actively receiving glonass data. and the internal antenna is not. 100% sure.

depending how and what GPS devices are being used, GPS can be very accurate. know what hardware and software you need and is it flexible enough to wor...