OPS 3762

OPS 3762

Operator	US National Reconnaissance Office
Major contractors	Boeing Goodyear ERIM Lockheed (Agena)
Bus	Agena-D
Mission type	Radar imaging
Launch date	21 December 1964 19:08:56 UTC
Carrier rocket	TAT SLV-2A Agena-D 425
Launch site	Vandenberg LC-75-1-1
Mission duration	4 days
Orbital decay	11 January 1965
COSPAR ID	1964-087A
Mass	1,500 kilograms (3,300 lb)
Orbital elements
Regime	Low Earth
Inclination	70°
Apoapsis	222 kilometres (138 mi)
Periapsis	208 kilometres (129 mi)
Orbital period	88.8 minutes
Instruments
Main instruments	SLAR

OPS 3762, also known as FTV-2355, was an American reconnaissance satellite which was launched in 1964.^[1] It was the first radar imaging satellite to be launched, and the only Quill spacecraft to fly. Its mission was to demonstrate radar imaging techniques for future missions. However, the programme was cancelled before any more satellites were launched.^[2]

OPS 3762 was successfully launched aboard a Thrust Augmented Thor SLV-2A Agena-D carrier rocket, flying from Launch Complex 75-1-1 at the Vandenberg Air Force Base. The launch, which was the last orbital launch of the year, occurred at 19:08:56 UTC on 21 December 1964, and successfully placed the spacecraft into the low Earth orbit in which it conducted its mission.^[3] Owing to concerns that using radar over the Soviet Union may have been seen as provocative, OPS 3762 conducted imaging tests over the Northwestern United States instead.^[4]

OPS 3762 was a 1,500 kilograms (3,300 lb) spacecraft, based around the Agena-D which also served as the upper stage of its carrier rocket.^[5] It operated for four days. Its orbit had a perigee of 208 kilometres (129 mi), an apogee of 222 kilometres (138 mi), 70 degrees of inclination, and an orbital period of 88.8 minutes.^[1] Its side looking airborne radar produced images, which were returned in a KH-4 film capsule at the end of the mission.^[6] OPS 3762 itself remained in orbit until 11 January 1965, when its orbit decayed and it reentered the atmosphere.^[1] OPS 3762 completed its mission successfully.^[7]

See also

• 1964 in spaceflight

References

1. ^ ^{a b c} McDowell, Jonathan. "Satellite Catalog". Jonathan's Space Page. http://planet4589.org/space/log/satcat.txt. Retrieved 9 June 2010. 
2. ^ Day, Dwayne A. (24 May 2010). "Flight of a feather: the QUILL radar satellite". The Space Review. http://www.thespacereview.com/article/1631/1. Retrieved 9 June 2010. 
3. ^ McDowell, Jonathan. "Launch Log". Jonathan's Space Page. http://planet4589.org/space/log/launchlog.txt. Retrieved 9 June 2010. 
4. ^ Richelson, Jeffrey T. (January 2009). "Ups and Downs of Space Radars". airforce-magazine.com. http://www.airforce-magazine.com/MagazineArchive/Pages/2009/January%202009/0109radars.aspx. Retrieved 9 June 2010. 
5. ^ Krebs, Gunter. "Quill". Gunter's Space Page. http://space.skyrocket.de/doc_sdat/quill.htm. Retrieved 9 June 2010. 
6. ^ "Space Radars". docstoc. http://www.docstoc.com/docs/41903914/SPACE-RADARS. Retrieved 9 June 2010. 
7. ^ Day, Dwayne A. (22 January 2007). "Radar love: the tortured history of American space radar programs". The Space Review. http://www.thespacereview.com/article/790/1. Retrieved 9 June 2010.