Engineering:USA-585

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USA-585
File:GPS III-8 Mission Launches from Cape Canaveral Space Force Station (9628811).jpg
Launch of USA-585
NamesNavstar 86
GPS-III SV10
Hedy Lamarr
USA-585
Mission typeNavigation
OperatorUSSF
COSPAR ID2026-087A
SATCAT no.68791
Spacecraft properties
SpacecraftGPS-III SV10
Spacecraft typeGPS Block III
BusA2100M
ManufacturerLockheed Martin
Start of mission
Launch date21 April 2026, 06:53 UTC
RocketFalcon 9 Block 5
Launch siteCape Canaveral, SLC-40
ContractorSpaceX
Orbital parameters
Reference systemGeocentric orbit
RegimeMedium Earth orbit
(Semi-synchronous orbit)
 

USA-585 (also known as GPS III-10, NAVSTAR 86 and Hedy Lamarr), is a United States navigation satellite which forms part of the Global Positioning System.[1][2] It was launched by Falcon 9 on 21 April 2026.[3][4][5] It is the 10th and final satellite in the GPS III series.[3][5]

Satellite

Artist's rendering of GPS-III satellite in orbit

The satellite was named in 2021 after Hedy Lamarr, the inventor of the frequency-hopping technology.[6][7][8] Construction of the satellite was completed in February 2023.[9] The satellite includes a Tesat-Spacecom SCOT80 optical communications terminal, intended to perform the first laser communications test from a GPS satellite at medium Earth orbit.[9][10][11]

Launch

The satellite's launch was originally awarded to SpaceX but it was later switched to ULA for a mission exchange to launch GPS III-07 Sally Ride on Falcon 9 and later in March 2026 it was reassigned to SpaceX because of delays due to recent Vulcan solid rocket booster issues during the launch of the USSF-87 mission.[3][9] In exchange, ULA was awarded with USSF-70 mission originally planned for launch on Falcon Heavy.[12][13] The launch mission was named GPS III-8.[14]

References

  1. ↑ "GPS-3 (Navstar-3)" (in en). https://space.skyrocket.de/doc_sdat/navstar-3.htm. 
  2. ↑ "Falcon 9 • GPS III-8 – Spaceflight Now" (in en-US). https://spaceflightnow.com/launch/falcon-9-gps-iii-8/. 
  3. ↑ 3.0 3.1 3.2 "SpaceX launches advanced GPS satellite for US Space Force after rocket swap (photos)" (in en). 2026-04-21. https://www.space.com/space-exploration/launches-spacecraft/spacex-launch-gps-iii-sv-10-satellite-us-space-force. 
  4. ↑ "GPS III SV10 | Falcon 9 Block 5 | Next Spaceflight" (in en). https://nextspaceflight.com/launches/details/7340/. 
  5. ↑ 5.0 5.1 Erwin, Sandra (2026-04-21). "Falcon 9 launches final GPS 3 satellite into orbit for U.S. Space Force" (in en-US). SpaceNews. https://spacenews.com/falcon-9-launches-final-gps-3-satellite-into-orbit-for-u-s-space-force/. 
  6. ↑ "First of Its Name, Last of Its Kind Core Mate Complete for Final GPS III Space Vehicle; Bring on the GPS IIIFs". 8 December 2021. https://spacenews.com/first-of-its-name-last-of-its-kind-core-mate-complete-for-final-gps-iii-space-vehicle-bring-on-the-gps-iiifs/. 
  7. ↑ GNSS, Inside (2021-12-17). "Tenth GPS III Satellite Named for Inventor of Technique at Base of CDMA Signal Structure" (in en-US). https://insidegnss.com/tenth-gps-iii-satellite-named-for-inventor-of-technique-at-base-of-cdma-signal-structure/. 
  8. ↑ Service, City News. "Space Force to Launch GPS Satellite Named for Hedy Lamarr | REAL 92.3" (in en). https://real923la.iheart.com/featured/la-local-news/content/2026-04-17-space-force-to-launch-gps-satellite-named-for-hedy-lamarr/. 
  9. ↑ 9.0 9.1 9.2 Yoder, Sean (2026-04-20). "Launch Preview: GPS, Progress, and Starlink missions to launch during busy week" (in en-US). https://www.nasaspaceflight.com/2026/04/launch-preview-042026/. 
  10. ↑ Jewett, Rachel (2024-12-03). "Lockheed Martin Selects Tesat Optical Terminals for GPS Demonstration" (in en-US). https://www.satellitetoday.com/technology/2024/12/03/lockheed-martin-selects-tesat-optical-terminals-for-gps-demonstration/. 
  11. ↑ Erwin, Sandra (2026-02-24). "Lockheed Martin presses case that GPS upgrade will counter jamming threats" (in en-US). SpaceNews. https://spacenews.com/lockheed-martin-presses-case-that-gps-upgrade-will-counter-jamming-threats/. 
  12. ↑ "USSF prioritizes GPS III capability delivery timeline, executes launch provider exchange for NSSL mission" (in en). https://www.ssc.spaceforce.mil/Newsroom/Article-Display/Article/4439687/ussf-prioritizes-gps-iii-capability-delivery-timeline-executes-launch-provider. 
  13. ↑ D'Urso, Andrea (2026-04-21). "L'ultimo satellite GPS III è arrivato in orbita con un Falcon 9 di SpaceX" (in it-IT). https://www.astrospace.it/2026/04/21/lultimo-satellite-gps-iii-e-arrivato-in-orbita-con-un-falcon-9-di-spacex/. 
  14. ↑ "GPS III-8 Mission" (in en). SpaceX. https://www.spacex.com/launches/gpsiii8. 

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