Illustration of an ITOS series satellite
|Mission duration||4 years|
|Launch mass||339.7 kilograms (749 lb)|
|Start of mission|
|Launch date||15 November 1974, 17:11:00UTC|
|Rocket||Delta 2310 D104|
|Launch site||Vandenberg SLC-2W|
|End of mission|
|Deactivated||18 November 1978|
|Perigee||1,451 kilometers (902 mi)|
|Apogee||1,465 kilometers (910 mi)|
|Epoch||8 December 2013, 12:44:30 UTC|
|VHRR, VTPR, SR|
NOAA-4, also known as ITOS-G was a weather satellite operated by the National Oceanic and Atmospheric Administration (NOAA). It was part of a series of satellites called ITOS, or improved TIROS. NOAA-4 was launched on a Delta rocket on 15 November 1974. The launch carried two other satellites: AMSAT-OSCAR 7 and Intasat. It remained operational for 1463 days until it was deactivated by NOAA on 18 November 1978.
- "NASA/NSSDC NOAA-4 spacecraft details". Retrieved 2008-10-20.
- McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved 8 December 2013.
- "NOAA 4 Satellite details 1974-089A NORAD 7529". N2YO. 8 December 2013. Retrieved 8 December 2013.
- Wade, Mark. "ITOS". Encyclopedia Astronautica. Retrieved 2008-10-20.
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