<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><style></style></head><body style="background: #FFFFFF; font-family: arial; font-size: 10pt; margin: 0px; padding: 0px;"> Dear All!<br><br>I try to test RTKlib, but i ran into a problem. I have two ublox lea-6T, and for now i connected them to PC via USB. The op system is win7, and the rtklib version is 2.4.1. Both receiver working fine in single mode, but when i try use them together (as rover and base station), the base station isn't giving any position. The signals come, i haven't got any "no base station observation data for rtk" error message, but it won't to work.<br>When i convert the log of the base station to RINEX, it hasn't any APPROX POSITION XYZ. (In the options of rtknavi i fill the positions properly) When i wrote into this the coordinates, it working fine with post processing. But i have to use it in real-time.<br><br>Did i miss something setting or can give me anybody some advice?<br><br>Thanks for helping!<br><br>Stephen<br></body></html>