Applying the geodetic detrending technique for investigating the consistency of GPS L2P(Y) in several receivers

Abstract Global Navigation Satellite System signals have been used for years to study high-frequency fluctuations ( f > 0.1 Hz) in the ionosphere. The customary procedure uses geometry-free (GF) combination of L 1 and 2 carriers, which it is necessary acquire GPS signal. Initially, had be acquired from a codeless signal, L2P(Y), using several techniques, some them requiring aid . New satellites transmit new C civil code, can directly , i.e. L2C. Several publications reported differences GF when computed L2P(Y) or Using two ionospheric scintillation monitoring receivers (ISMRs), these were shown related how they if receiver acquires with aid. However, ISMRs are scarce, so extension such not straightforward. present work geodetic detrending technique identify whether conventional geodetic-grade employs six different types measurements stored RINEX formats version 3. In both formats, we able signal this way, show that heavily underestimate combination. Our results ionosphere-free carrier phases free fluctuations, but receivers, almost 90% effects remain