World Library  
Flag as Inappropriate
Email this Article

Usa-239

Article Id: WHEBN0041970839
Reproduction Date:

Title: Usa-239  
Author: World Heritage Encyclopedia
Language: English
Subject: 2012 in spaceflight, GPS Block IIF, Navstar 7, GPS satellite blocks, USA-126
Collection:
Publisher: World Heritage Encyclopedia
Publication
Date:
 

Usa-239

USA-239
A Block IIF GPS satellite
Mission type Navigation
Operator US Air Force
COSPAR ID 2012-053A[1]
SATCAT № 38833[1]
Mission duration 15 years (planned)
Spacecraft properties
Spacecraft GPS SVN-65 (IIF-3)
Spacecraft type GPS Block IIF
Manufacturer Boeing
Launch mass 1,630 kilograms (3,590 lb)[2]
Start of mission
Launch date 4 October 2012, 12:10 (2012-10-04T12:10Z) UTC
Rocket Delta IV-M+(4,2), D361[3]
Launch site Cape Canaveral SLC-37B[3]
Contractor ULA
Orbital parameters
Reference system Geocentric
Regime Medium Earth
(Semi-synchronous)
Perigee 20,132 kilometers (12,509 mi)[4]
Apogee 20,231 kilometers (12,571 mi)[4]
Inclination 54.87 degrees[4]
Period 717.96 minutes[4]

USA-239, also known as GPS IIF-3, and GPS SVN-65, is an American navigation satellite which forms part of the Global Positioning System. It was the third of twelve Block IIF satellites to be launched.[2]

Built by Boeing and launched by United Launch Alliance, USA-239 was launched at 12:10 UTC on 4 October 2012, atop a Delta IV carrier rocket, flight number D361, flying in the Medium+(4,2) configuration.[3] The launch took place from Space Launch Complex 37B at the Cape Canaveral Air Force Station,[5] and placed USA-239 directly into medium Earth orbit.[4] The rocket's second stage failed to provide the expected full thrust in all of its three burns due to a leak above the narrow throat portion of the thrust chamber, however the stage had enough propellant margins to put the satellite in the correct orbit.[6]

As of 18 February 2014, USA-232 was in an orbit with a perigee of 20,231 kilometers (12,571 mi), an apogee of 20,132 kilometers (12,509 mi), a period of 717.96 minutes, and 54.87 degrees of inclination to the equator.[4] It is used to broadcast the PRN 24 signal, and operates in slot 1 of plane A of the GPS constellation. The satellite has a design life of 15 years and a mass of 1,630 kilograms (3,590 lb). [2] As of 2014 it remains in service.

References

  1. ^ a b
  2. ^ a b c
  3. ^ a b c
  4. ^ a b c d e f
  5. ^
  6. ^
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 


Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.