Tired of equations and matrices? Ready to learn the easy way? This post explains the Kalman Filter simply with pictures and examples!

OwnTracks allows you to keep track of your own location. You can build your private location diary or share it with your family and friends. OwnTracks is open-source and uses open protocols for communication so you can be sure your data stays secure and private.

Shows leap seconds

JPL Extended Ephemeris performance

SiRF Extended Ephemeris performance

Constellation status for GPS and GLONASS

The Crustal Dynamics Data Information System (CDDIS) supports data archiving
and distribution activities for the space geodesy and geodynamics community.

A KML library that uses XML Serialization to load and save KML documents to/from files.