# OPS 3762

> Mediated Wiki article. Canonical URL: https://mediated.wiki/source/OPS_3762
> Markdown URL: https://mediated.wiki/source/OPS_3762.md
> Source: https://en.wikipedia.org/wiki/OPS_3762
> Source revision: 1331512925
> License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/)

American reconnaissance satellite launched in 1964

OPS 3762 Mission type Radar imaging Operator US National Reconnaissance Office COSPAR ID 1964-087A SATCAT no. 00964 Mission duration 4 days Spacecraft properties Spacecraft type Quill Bus Agena-D Manufacturer Boeing Goodyear ERIM Lockheed (Agena) Launch mass 1,500 kilograms (3,300 lb) Start of mission Launch date 21 December 1964, 19:08:56 (1964-12-21UTC19:08:56Z) UTC Rocket TAT SLV-2A Agena-D 425 Launch site Vandenberg LC-75-1-1 End of mission Deactivated December 1964 (1965-01) Decay date 11 January 1965 Orbital parameters Reference system Geocentric Regime Low Earth Eccentricity 0.00196 Perigee altitude 238 kilometers (148 mi) Apogee altitude 264 kilometers (164 mi) Inclination 70.1 degrees Period 89.4 minutes Epoch 21 December 1964, 14:12:00 UTC[1] Instruments SLAR

**OPS 3762**, also known as **FTV-2355**, was an American [reconnaissance satellite](/source/Reconnaissance_satellite) which was launched in 1964.[2] It was the first [radar imaging](/source/Radar_imaging) satellite to be launched, and the only [Quill](/source/Quill_(satellite)) 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.[3]

OPS 3762 was successfully launched aboard a [Thrust Augmented Thor SLV-2A Agena-D](/source/Thor-Agena) carrier rocket, flying from [Launch Complex 75-1-1](https://en.wikipedia.org/w/index.php?title=Vandenberg_AFB_Launch_Complex_75&action=edit&redlink=1) at the [Vandenberg Air Force Base](/source/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](/source/Low_Earth_orbit) in which it conducted its mission.[4] Owing to concerns that using radar over the [Soviet Union](/source/Soviet_Union) may have been seen as provocative, OPS 3762 conducted imaging tests over the [Northwestern United States](/source/Northwestern_United_States) instead.[5]

OPS 3762 was a 1,500 kilograms (3,300 lb) spacecraft, based on the [Agena-D](/source/RM-81_Agena) which also served as the upper stage of its carrier rocket.[6] It operated for four days. Its orbit had a [perigee](/source/Apsis) of 208 kilometres (129 mi), an [apogee](/source/Apsis) of 222 kilometres (138 mi), 70 degrees of [inclination](/source/Inclination), and an [orbital period](/source/Orbital_period) of 88.8 minutes.[2] Its [side looking airborne radar](/source/Side_looking_airborne_radar) produced images, which were returned in a [KH-4](/source/Corona_(satellite)) film capsule at the end of the mission.[7] OPS 3762 itself remained in orbit until 11 January 1965, when its orbit [decayed](/source/Orbital_decay) and it [reentered](/source/Atmospheric_reentry) the atmosphere.[2] OPS 3762 completed its mission successfully.[8]

## See also

- [Spaceflight portal](https://en.wikipedia.org/wiki/Portal:Spaceflight)

- [1964 in spaceflight](/source/1964_in_spaceflight)

## References

1. **[^](#cite_ref-1)** ["NASA - NSSDCA - Spacecraft - Trajectory Details"](https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1964-087A). *nssdc.gsfc.nasa.gov*. Retrieved 2018-05-02.

1. ^ [***a***](#cite_ref-Satcat_2-0) [***b***](#cite_ref-Satcat_2-1) [***c***](#cite_ref-Satcat_2-2) [McDowell, Jonathan](/source/Jonathan_McDowell). ["Satellite Catalog"](http://planet4589.org/space/log/satcat.txt). Jonathan's Space Page. Retrieved 9 June 2010.

1. **[^](#cite_ref-feather_3-0)** Day, Dwayne A. (24 May 2010). ["Flight of a feather: the QUILL radar satellite"](http://www.thespacereview.com/article/1631/1). The Space Review. Retrieved 9 June 2010.

1. **[^](#cite_ref-4)** McDowell, Jonathan. ["Launch Log"](http://planet4589.org/space/log/launchlog.txt). Jonathan's Space Page. Retrieved 9 June 2010.

1. **[^](#cite_ref-AFM_5-0)** Richelson, Jeffrey T. (January 2009). ["Ups and Downs of Space Radars"](https://www.airandspaceforces.com/PDF/MagazineArchive/Documents/2009/January%202009/0109radars.pdf) (PDF). *[Air & Space Forces Magazine](/source/Air_%26_Space_Forces_Magazine)*. Vol. 92, no. 1. [Archived](https://web.archive.org/web/20250909005927/https://www.airandspaceforces.com/PDF/MagazineArchive/Documents/2009/January%202009/0109radars.pdf) (PDF) from the original on 9 September 2025. Retrieved 9 June 2010.

1. **[^](#cite_ref-GSP_6-0)** Krebs, Gunter. ["Quill"](http://space.skyrocket.de/doc_sdat/quill.htm). Gunter's Space Page. Retrieved 9 June 2010.

1. **[^](#cite_ref-SpaceRadars_7-0)** ["Space Radars"](http://www.docstoc.com/docs/41903914/SPACE-RADARS). docstoc. Retrieved 9 June 2010.

1. **[^](#cite_ref-RL_8-0)** Day, Dwayne A. (22 January 2007). ["Radar love: the tortured history of American space radar programs"](http://www.thespacereview.com/article/790/1). The Space Review. Retrieved 9 June 2010.

v t e ← 1963 Orbital launches in 1964 1965 → Poppy 3 GGSE-1 SOLRAD 7A SECOR 1 OPS 3367A OPS 3367B Relay 2 Echo 2 Jupiter Nosecone Elektron 1 Elektron 2 Ranger 6 OPS 3444 Zond 3MV-1 No.2 Kosmos 25 OPS 2423 OPS 3722 OPS 3435 Kosmos 26 BE-A Luna E-6 No.6 OPS 3467 Kosmos 27 Ariel 2 Zond 1 Kosmos 28 Gemini 1 Polyot 2 Luna E-6 No.5 Transit 5BN-3 Transit 5E-4 OPS 3743 Kosmos 29 OPS 2921 Kosmos 30 OPS 3592 Apollo AS-101 OPS 4412 OPS 3483 Molniya-1 No.2 Kosmos 31 Kosmos 32 OPS 3236 OPS 4467A OPS 4467B OPS 3754 Kosmos 33 ESRS Atlas-Centaur 3 Kosmos 34 OPS 3395 OPS 3684 OPS 4923 Elektron 3 Elektron 4 OPS 3491 Kosmos 35 Vela 2A Vela 2B ERS-13 Ranger 7 Kosmos 36 OPS 3042 Kosmos 37 OPS 3802 OPS 3216 Kosmos 38 Kosmos 39 Kosmos 40 Syncom 3 OPS 2739 Kosmos 41 Kosmos 42 Kosmos 43 Kosmos 44 Titan 3A-2 OGO-1 Kosmos 45 OPS 3497 Apollo AS-102 OPS 4262 Kosmos 46 Explorer 21 OPS 3333 Kosmos 47 OPS 5798 Dragsphere 1 Dragsphere 2 OPS 4036 Explorer 22 Voskhod 1 Kosmos 48 OPS 3559 Strela-1 No.6 Strela-1 No.7 Strela-1 No.8 OPS 4384 OPS 5063 Kosmos 49 Kosmos 50 OPS 5434 OPS 3062 Mariner 3 Explorer 23 OPS 3360 ORBIS Explorer 24 Explorer 25 Mariner 4 Zond 2 DS-2 No.2 OPS 4439 Kosmos 51 Titan 3A-1 Surveyor Mass Model OPS 6582 Transit 5E-5 San Marco 1 OPS 3358 Explorer 26 OPS 3762 Payloads are separated by bullets ( · ), launches by pipes ( | ). Crewed flights are indicated in underline. Uncatalogued launch failures are listed in italics. Payloads deployed from other spacecraft are denoted in (brackets).

This article about one or more spacecraft of the United States is a stub. You can help Wikipedia by adding missing information.

- [v](https://en.wikipedia.org/wiki/Template:US-spacecraft-stub)
- [t](/source/Template_talk%3AUS-spacecraft-stub)
- [e](https://en.wikipedia.org/wiki/Special:EditPage/Template:US-spacecraft-stub)

---
Adapted from the Wikipedia article [OPS 3762](https://en.wikipedia.org/wiki/OPS_3762) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/OPS_3762?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.