Affordable GNSS Receivers?

Greetings GNSS users:

Does anyone have any experience with iGage GNSS equipment? My small business model and work load cannot justify investment in the high end GNSS equipment in the $30k range. iGage has very reasonable prices on dual frequency recei

Promark 3 GPS

i have problem with my promark 3 Gps When i switch it on the programme menu did not display.Please assist

Glossary Guide to GPS Terms

Below is a good start for a glossary style definitions list related to GPS Terms.  Feel free to add your terms as comments below the post. 

- A -

Almanac - the Almanac is a file which contains positional information for all of the GPS satellites. The

GPS and Canopy

Causing Interference

GPS receivers require a line of sight to the satellites in order to obtain a signal representative of the true distance from the satellite to the receiver. Therefore, any object in the path of the signal has the potential to inte

OPUS Post Processing

trimble r8 base and rover with trimble controller and trimble software

My question/problem is once my set up is complete and I go and tell the controller to start survey, Iget 100%reliability my sats drop in half meaning i have say 12 to 13 it goes to 6or7 . the glonss box and lc2 are both checked

Bri in fl

Home-Made GPS Receiver How-to

I was blown away when I saw (via Make)that someone had created a home-made GPS receiver.  Andrew Holme just may be a genius. He built an incredible four-channel GPS receiver using some repurposed FPGA board from a previous frequency synthesizer proje

HTC Android GPS Apps

I want a free or low priced GPS app or program that will show and store bread crumb "trails" to the SD card.  I will use it on an Android Desire Phone Device and/or transfer and show on PC and overlay onto Google Maps or Google Earth. 

Display of

LightSquared GPS

LightSquared GPS is a problem!  We need more discussion on this topic because it affects every Land Surveyor on Earth.  We could even have a group solely dedicated to this topic, but for now the GPS group will have to speak LOUD about the emerging th

Master Survey Programs

Master Survey Programs

Poor Mans GPS Network by Phil Stevenson

Phil Stevenson, Land Surveyors United member, Magellan-Ashtech equipment expert and professional self-proclaimed "Dirt Surveyor" wrote a paper once called "Poor Man's GPS Network," which I have for you below to download and read.


Click to Open and

Virtual Reference Station

Here are some informative papers on VRS, I found while surfing the net