GPS IIIF
Abstract
The GPS is a space-based navigation system that fills validated Joint Service requirements for worldwide, accurate, common grid three dimensional positioning/navigation for military aircraft, ships, and ground personnel. The consistent accuracy, unaffected by location or weather and available in real time, significantly improves effectiveness of reconnaissance, weapons delivery, mine countermeasures and rapid deployment for all services. GPS must comply with Title 10 USC Sec. 2281, which requires that the Secretary of Defense ensures the continued sustainment and operation of GPS for military and civilian purposes, and 51 USC Sec. 50112, which requires that GPS complies with certain standards and facilitates international cooperation. The system is composed of three segments: User Equipment (funded under PE 1203164F, 1203164SF), Space (funded under PE 1203165F, 1203265F, 1203265SF, 1203269F, and 1203269SF), and a Control Network (funded under PE 1206423F, 1206423SF and 1203165F). The satellites broadcast high accuracy data using precisely synchronized signals that are received and processed by user equipment installed in military platforms. The user equipment computes the platform position and velocity and provides steering vectors to target locations or navigation waypoints. The control segment provides daily updates to the navigation messages broadcast from the satellites to maintain system precision in three dimensions to 16 meters (spherical error probable) worldwide. Additionally, GPS supports the USNDS mission and provides strategic and tactical support to the following DoD missions: Joint Operations by providing capabilities for PNT; C3I; Special Operations; MOUT; DWMS; Air Mobility; and Space Launch Orbital Support. GPS IIIF delivers improved satellites beyond the first ten GPS III SVs being delivered (funded in PE 1203265SF GPS III Space Segment). While GPS IIIF satellites maintain the same capabilities as the GPS III satellites, they deliver significant enhancements to include: potential on-ramping of advanced PNT technology from efforts such as the NTS-3, backward compatibility, USB interface compliance, integration of hosted payloads including a redesigned USNDS payload, LRAs, SAR/GPS, and RMP capabilities that provide the ability to deliver high-power regional M-Code signals in specific areas of intended effect. Implementation of RMP into the GPS Enterprise requires integration with the ground and user segments, executed by the OCX, along with the MGUE programs, respectively. The SAR/GPS payload provided by Canada fills a validated National Search and Rescue Committee requirement to provide enduring, space-based distress alerting capability to detect, locate, and relay distress alerts to fulfill its responsibilities under international agreements for Search and Rescue. LRA, built by the NRL, is a passive reflector that improves accuracy and provides better ephemeris data. NGA funds the integration costs of the LRA. This PE funds the RDT&E of GPS IIIF SVs 11-12 (to include NRE support efforts). This program includes risk-reducing simulators and systems engineering associated with delivering the new capabilities required of GPS IIIF satellites.
Document Details
- Document Type
- Project
- Publication Date
- Oct 01, 2023
- Source ID
- 653170_1203269SF_5_3620F_PB_2023
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