The Launch Readiness Review was completed on Monday in preparation for the Air Force’s GPS IIF-8 launch. The mission is set to lift off on a ULA Atlas V rocket on Wednesday, Oct. 29 at 1:21 p.m. EDT from Space Launch Complex 41 at Cape Canaveral Air Force Station in Florida. Today’s L-2 forecast continues to show a 70 percent chance of favorable weather conditions for launch.
A United Launch Alliance Atlas V 401 vehicle will deliver the GPS IIF-8 satellite to semi-synchronous circular orbit. Liftoff will occur from Space Launch Complex 41 at Cape Canaveral Air Force Station, FL.
The Navstar GPS is a constellation of satellites that provides navigation data to military and civilian users worldwide. The system is operated and controlled by the 50th Space Wing, located at Schriever Air Force Base, CO.
GPS utilizes 24 satellites, in six different planes, with a minimum of four satellites per plane, positioned in orbit approximately 11,000 miles above the Earth’s surface. The satellites continuously transmit digital radio signals pertaining to the exact time (using atomic clocks) and exact location of the satellites. The GPS IIF series have a design life of 12 years. With the proper equipment, users can receive these signals to calculate time, location, and velocity. The signals are so accurate that time can be measured to within a millionth of a second, velocity within a fraction of a mile per hour, and location to within feet. Receivers have been developed for use in aircraft, ships, land vehicles, and to hand carry.
As a result of increased civil and commercial use as well as experience in military operations, the USAF has added the following capabilities and tech-nologies to the GPS IIF series to sustain the space and control segments while improving mission performance:
- Two-times greater predicted signal accuracy than heritage satellites.
- New L5 signals for more robust civil and commercial aviation.
- An on-orbit, reprogrammable processor, receiving software uploads for improved system operation.
- Military signal “M-code” and variable power for better resistance to jamming hostile environments, meeting the needs of emerging doctrines of navigation warfare.