From jim.ray at noaa.gov Thu Jun 14 12:35:23 2012 From: jim.ray at noaa.gov (Jim.Ray) Date: Thu, 14 Jun 2012 15:35:23 -0400 Subject: [IGSSTATION-4952] misconfiguration of some Trimble NETRS & NETR5 receivers In-Reply-To: <4FD87A54.80006@noaa.gov> References: <4FC603ED.8000904@noaa.gov> <4FD87A54.80006@noaa.gov> Message-ID: <4FDA3CFB.50404@noaa.gov> Author: Jim Ray In tracking down the problem of low data yields at NIUM, I have noticed that other stations seem to suffer the same problem, probably for the same reason. TEQC output summaries for doy 163 have shown that several stations collect no L2 P-code data from GPS Blocks IIR-M (8 SVs) or IIF (2 SVs) satellites. This is presumably due to a receiver misconfiguration, possibly due to the issue of how to deal with L2C tracking for those SVs. Some stations affected by this (not necessarily complete!) are: DUBR -- NETR5 FALE -- NETRS KSMV -- NETRS (no PRN32 data at all either) LHCL -- NETRS NIUM -- NETRS OSJE -- NETR5 These are easily detected from the TEQC summary lines, that show numbers of deleted points around 7500 and % yields about 70%. Some other stations are missing certain different SVs altogether: BOAV -- NETR5: no PRNs 01 or 25 (IIF satellites) YARR -- Leica GRX1200PRO: no PRNs 07, 08, 15 And some other stations have very low yields for apparently different reasons that I cannot easily diagnose: THIO -- NETRS: 40% yield DRAO -- NETR8: 70% yield GLDR -- Leica GRX1200PRO: 74% yield With such large volumes of data missing, the resulting geodetic results should be not be considered very reliable. Having no personal experience operating any of these receiver models, however, I cannot provide any advice how to address the problems.