GPS Data Collection Methods Various methods are used to collect high precision differential GPS data. The particular method used depends on several factors, including survey objectives, desired precision, available equipment, and field logistics.... Read More

GPSurvey V2.35 - How to process GPS data (outline) UNAVCO 10/9/00 PROJECT: Create New or Open existing project LOAD data From DAT File: - CONFIG "interactive" or "quick edit/batch prompt" PROCESS Baselines – ADD files to process In WAVE... Read More

Permanent GNSS/GPS Station Planning: Technology, Equipment, Costs Permanent GNSS Stations for Geodetic Applications: Equipment, Sites, Costs -- S. Fisher This is intended as a primer for investigators wishing to implement permanent GNSS stations wit... Read More

This article presents a comparison of measured signal to noise ratio (SNR) values observed from several  GNSS antenna types. The results presented below were collected using a monument located on the UNAVCO Facility Roof in Boulder, CO. Each... Read More

The UNAVCO configuration file for the NetR9 (right click to download. is intended for use with firmware version 5.44 Config file is a XML file the firmware file may be downloaded as a mp3 files dues the browser that is used, you will need... Read More

The Effects of L2C Signal Tracking on High-Precision Carrier Phase GPS Postioning Introduction In December, 2005, the L2C signal was introduced to improve the accuracy, tracking and redundancy of the GPS system for civilian users. The unencrypted L2C... Read More

The Iridium satellite communication system uses the 1616-1626.5 MHz band to uplink with orbiting communication satellites. UNAVCO Inc. uses iridium communication links to download GPS data from remote GPS stations located at high latitudes. The L1... 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

Septentrio added the capability of logging and streaming BINEX  to the PolaRx5 receiver model with the release of firmware version 5.1.0 . BINEX is an open binary data format for GNSS research. It has been developed in a collaborative... Read More

The following power tests were conducted on GPS and GNSS antennas using an Agilent N6705 DC Power Analyzer. The following tests show short, 1-minute averages of measured power consumption. The power use of each antenna was tested at two separate... Read More