GPS Receiver and Antenna Testing Report for SuomiNet Mike Jackson, Chuck Meertens, Victoria Andreatta, Teresa Van Hove University NAVSTAR Consortium, Boulder, Colorado 1.0 Introduction SuomiNet is a university-based, real-time, national Global... Read More

Update: GPS/GNSS Interference From Iridium Data TransmissionsThe Iridium satellite communication system broadcasts in the 1610 to 1626.5 MHz band. UNAVCO Inc. uses iridium communication links to download GPS data from remote GPS stations. The L1 freq... Read More

Power Draw Profile for Trimble NetRS and Iridium System Test Summary UNAVCO performed a benchtop test to record a high-resolution time history of power consumed by a Trimble NetRS GPS system with Iridium communications. The test system consisted of... Read More

Preliminary report on data quality with a Trimble 5700 GPS receiver and an Ashtech Choke Ring Antenna Date: May 22, 2002 Author: Mike Jackson A critical issue with the use of the Trimble 5700 GPS receiver for use as a geodetic base station system is... Read More

Topcon GB-1000 First Article Receiver Testing September 29, 2004 Victoria Andreatta This document summarizes the changes requested by UNAVCO before the GB-1000 could be deemed fully acceptable as a campaign GPS system (acceptance of first article... Read More

Trimble NetRS - Power Draw Tests UNAVCO performed a short benchtop test series to determine the difference in power draw by a Trimble NetRS receiver when connected to three common geodetic GPS antennas. All tests were performed at room temperature.... Read More

Using the quality check function in Teqc, we analyzed RINEX observation files from two GPS sites in the PBO network over a period of ~2 years. Both the sites in this analysis were equipped with Trimble NetRS receivers. We observed changes in the trac... Read More

UNAVCO 2003 GPS Receiver and Antenna Testing in Support of the Plate Boundary Observatory (PBO) The attached file contains the 2003 PBO Permanent Station Receiver Test Report. The UNAVCO Facility in Boulder was tasked with evaluating various GPS... Read More

Click here to view the report, "UNAVCO 2004 GPS Campaign System Testing in Support of the Plate Boundary Observatory (PBO)," described below. UNAVCO issued Request for Proposal (RFP) in 2004 to purchase 100 high precision campaign GPS systems for use... Read More

  Public Version: September 22, 2105 Originally submitted in confidence: May 18, 2015 Prepared by the RFP Evaluation Committee: Dr. Frederick Blume – Project Manager, Development & Testing, GI Directorate (Chair) Henry Berglund ­... Read More