Thanks for the responses! I apologize for breaking the thread, but I had turned on Digests by accident and couldn't figure out how to reply to individual messages.
"I'm not sure what receivers you are using, but if it's this one: http://www.nvs-gnss.com/products/receivers/item/2-nv08c-csm.html it seems to be L1 only, not L1+L2. The antenna you are using covers 1574-1610 MHz, so while multi-system (GPS/Glonass) it is also L1 only. The GPS L2 frequency is quite a bit lower, at 1227.6 MHz. http://en.wikipedia.org/wiki/GPS_signals#Frequencies_used_by_GPS As far as I know, GPS L1+L2 receivers start around $750 used (eg. Trimble 4000ssi on ebay) and much more new. " Hi John. I had completely overlooked the fact that the NV08C couldn't utilize L2 as I had read a lot of information about using it in RTK setups. I'm rather new to GPS. My understanding is that without L2 I will not be able to get rid of ionospheric delay, which will increase error. Could this be why my system isn't performing as I hoped? Can I get away with using an L1+L2 receiver on the Base Station and not on the Rover? "Did you try with simultaneous mode of ambiguity resolution and use a smaller min ratio to fix ambiguity, such as 2 or 1.5? Kind regards, Yanqing " Hello Yanging. I tried instantaneous mode and it seemed much worse. My Float solutions oscillated by several meters (instead of a tens of centimeters with a drift) and I couldn't get a Fix. I tried reducing the ratio in the other modes. Although that got me a fix more easily, I was concerned that it wasn't accurate, as it was not repeatable. -Sean
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