Engineering:Navigation Technology Satellite

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Short description: Experimental US satellites

The Navigation Technology Satellites are satellite demonstrations of new technologies related to satellite navigation, especially for next-generation GPS satellites.[1][2][3]

List of satellites

Name SATCAT Launch date (UTC) Launch vehicle Launch site Orbital apsis Inclination Period (min) Status
NTS-1 (Timation 3)[4][5] 7369 14 July 1974
 Atlas-F/PTS Vandenberg, SLC-3W Success
NTS-2 (Timation 4)[6] 10091 23 June 1977
 Atlas-F/SGS-1 Vandenberg, SLC-3W Success
NTS-3[7] 65160 13 August 2025
00:56 UTC 		Vulcan Centaur VC4S Cape Canaveral, SLC-41 Success

Navigation Technology Satellite-1 (NTS-1), also known as Timation-3 or P73-3, was a US Navy satellite launched on July 14, 1974, from Vandenberg Air Force Base, California, using an Atlas F/PTS rocket. It was a pivotal part of the TIMATION program, a precursor to the modern Global Positioning System (GPS), aimed at testing technologies for precise time-based navigation.[8]

NTS-2 before launch

Navigation Technology Satellite-2 (NTS-2), also known as Timation-4 or P76-4, was a US Navy technology-demonstration satellite launched on June 23, 1977, from Vandenberg Air Force Base, California, using an Atlas F/SGS-1 rocket. It was the second satellite in the Navigation Technology Satellite series, marking a critical step in the development of the modern Global Positioning System.[9]

File:A Mission Out of This World- The Benefield Anechoic Facility tests first space satellite in decades (2003237174).jpg
NTS-3 during testing
File:USSF-106 Launch (9263444).jpg
Launch of USSF-106, carrying NTS-3

Navigation Technology Satellite-3 (NTS-3) is a satellite to demonstrate new technologies related to satellite navigation. NTS-3 will demonstrate resilient positioning, navigation, and timing in a multi-layer space architecture.[10]

NTS-3 is based on the Northrop Grumman ESPAStar-D satellite bus. The satellite was launched on a Vulcan Centaur VC4S rocket as part of USSF-106 mission from SLC-41 at Cape Canaveral on 13 August 2025 at 00:56 UTC.[11][12][13]

See also

References

  1. ↑ "NTS 1 (P73-3)". Gunter's Space Page. https://space.skyrocket.de/doc_sdat/nts-1.htm. 
  2. ↑ "NTS 2 (P76-4)". Gunter's Space Page. https://space.skyrocket.de/doc_sdat/nts-2.htm. 
  3. ↑ "NTS 3". Gunter's Space Page. https://space.skyrocket.de/doc_sdat/nts-3.htm. 
  4. ↑ "NTS 1 (P73-3)". Gunter's Space Page. https://space.skyrocket.de/doc_sdat/nts-1.htm. 
  5. ↑ "Navigation Technology Satellite". web.archive.org. http://www.nrl.navy.mil/ssdd/heritage/nts. 
  6. ↑ "NTS 2 (P76-4)". Gunter's Space Page. https://space.skyrocket.de/doc_sdat/nts-2.htm. 
  7. ↑ "NTS 3". Gunter's Space Page. https://space.skyrocket.de/doc_sdat/nts-3.htm. 
  8. ↑ "Navigation Technology Satellite". web.archive.org. http://www.nrl.navy.mil/ssdd/heritage/nts. 
  9. ↑ "Navigation Technology Satellite". web.archive.org. http://www.nrl.navy.mil/ssdd/heritage/nts. 
  10. ↑ "NTS 3". Gunter's Space Page. https://space.skyrocket.de/doc_sdat/nts-3.htm. 
  11. ↑ Erwin, Sandra (9 April 2022). "Air Force space experiment will seek to demonstrate multi-orbit satellite navigation". SpaceNews. https://spacenews.com/air-force-research-lab-experiment-to-assess-benefits-of-multi-orbit-satellite-navigation/. 
  12. ↑ "AFRL To Test More-Resilient GPS Technologies". Aviation Week. https://aviationweek.com/defense/afrl-test-more-resilient-gps-technologies. 
  13. ↑ "Navigation Technology Satellite-3 (NTS-3) Satellite". AFRL Space Vehicle Directorate. https://www.kirtland.af.mil/Portals/52/NTS-3%20Factsheet_AFMC-2018-0419.pdf?ver=2019-02-01-093905-683. 

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