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 UNAVCO standard configuration file for the NetR8 is intended for use with firmware version 4.87. Do not use this file with earlier versions. Users should familiarize themselves with the details of the file and make changes according to their... Read More

Temperature Sensor With RS232 Serial Interface The purpose of this article is to present a method for creating a low-cost temperature sensor that can communicate over an RS232 serial connection with a Trimble GPS receiver. The temperature data can... Read More

This article provides a summary of UNAVCO's comparison of the current state-of-the art hardware from 5 major manufacturers. It will include comparisons of receiver data quality in the following areas: double difference phase residual RMS; qualitative... 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

TRIM4000 DOS-based Download Program for Trimble 4000 SSE and SSi Receivers UNAVCO 8/02 This is an outline of the steps needed to download data from Trimble 4000 SSE and SSi receivers. NOTE: The TRIM4000 program does not work properly when running DOS... 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

Equipment SetupALWAYS connect a UHF antenna before powering ON the APS-3, use the 440-470MHz antennas.Install two batteries per receiver.Setup APS-3 labeled base over your fixed base control point and record instrument height.If not specified below,... Read More

Ashtech Z-12 - How to configure for static/ rapid static surveys General Notes Turn on the unit with the toggle switch in the back of the unit. The menu currently displayed is shown by the highlighted number in the bottom right-hand corner of the... Read More