The GPS World Tech Talk blog is a resource for industry professionals and academics to share technical details surrounding GPS and GNSS systems, receivers, and applications. Every month, three new blogs are posted by international experts, discussing various aspects of GPS/GNSS navigation. The blogs are often illustrated with diagrams, photos, and formulas. They provide an excellent quick reference, and are categorized by subject matter.
Visitors are encouraged to comment on the blog entries written by the experts, as well as submit questions for future blog entries.
— Dorota Brzezinska, Forum Moderator
dbrzezinska @ questex.com
Why are GLONASS satellites launched on Christmas Day?
Why are GLONASS satellites launched on Christmas Day? Question posted on CANSPACE on December 10, 2006, by Kerry Matthews The latest…
GPS Transmitter Frequencies
Why are the two GPS Transmitter frequencies (1575.42 and 1227.6 MHz) coherently selected integer multiples of 10.23 MHz master clock? Question…
Antenna-induced biases in GNSS receivers May 17, 2007
By Inder Jeet Gupta It is well known that the phase center of a GNSS antenna can vary with the satellite direction. This phase center movement leads…
Integer ambiguity validation: Still an open problem?
By Sandra Verhagen High-precision Global Navigation Satellite System (GNSS) positioning results are obtained with carrier phase measurements, once…