Evolution of space: 2nd SOPS celebrates GPS Block III on-orbit test > Edwards Air Force Base > Air Force Features
AFSPC Milestone: First Block II GPS satellite launched > Air Force Space Command (Archived) > Article Display
Most Advanced GPS Satellite Comes Together: First Lockheed Martin-Built GPS III Ready for System-Level Testing
![Lockheed Martin Advances GPS Block III Testing - Inside GNSS - Global Navigation Satellite Systems Engineering, Policy, and Design Lockheed Martin Advances GPS Block III Testing - Inside GNSS - Global Navigation Satellite Systems Engineering, Policy, and Design](https://insidegnss-com.exactdn.com/wp-content/uploads/2018/01/GPS%20III%20SV01%20EMIEMC%20testing_web.jpg?strip=all&lossy=1&ssl=1)