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Tsiklon-2 | US-A 10

Yuzhnoye Design Bureau | Ukraine
Baikonur Cosmodrome, Republic of Kazakhstan
April 7, 1975, 11 a.m.
Status: Launch Successful
Mission:

Active radar satellite for ocean surveillance powered by a nuclear reactor.

Low Earth Orbit
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Soyuz | Soyuz 7K-T No.39 (Soyuz 18a / Soyuz 18-1)

Russian Federal Space Agency (ROSCOSMOS) | Russia
Baikonur Cosmodrome, Republic of Kazakhstan
April 5, 1975, 11:04 a.m.
Status: Launch Failure
Mission:

Soyuz 7K-T No.39, also known as Soyuz 18a or Soyuz 18-1, was intended to be the next crewed mission to the Salyut-4 space station. The mission launched on April 5, 1975, 11:04:54 UTC, but due to a failure of the Soyuz launch vehicle during ascent it was aborted. Safety system initiated separation of the spacecraft, and the crew of commander Vasili Lazarev and flight engineer Oleg Makarov experienced overloads of up to 21.3 g. The capsule landed safely at 11:26:21 UTC, followed by a successful rescue of the crew members.

Low Earth Orbit
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Tsiklon-2 | US-A 9

Yuzhnoye Design Bureau | Ukraine
Baikonur Cosmodrome, Republic of Kazakhstan
April 2, 1975, 11 a.m.
Status: Launch Successful
Mission:

Active radar satellite for ocean surveillance powered by a nuclear reactor.

Low Earth Orbit
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Vostok 8A92M | Meteor-1 21 (31L)

RKK Energiya | Russia
Plesetsk Cosmodrome, Russian Federation
April 1, 1975, 12:30 p.m.
Status: Launch Successful
Mission:

The Meteor-1 series was the first series of Soviet meteorological satellites.

Low Earth Orbit
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Kosmos-3M | DS-U2-IK 6

Russian Space Forces | Russia
Plesetsk Cosmodrome, Russian Federation
March 27, 1975, 2:30 p.m.
Status: Launch Successful
Mission:

Satellite designed to investigate the charged particle flows and ionosphere.

Low Earth Orbit
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Voskhod | Zenit-4MK 39

Soviet Space Program | Russia
Baikonur Cosmodrome, Republic of Kazakhstan
March 27, 1975, 8 a.m.
Status: Launch Successful
Mission:

High resolution optical reconnaissance satellite of the Vostok-based Zenit family.

Low Earth Orbit
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Voskhod | Zenit-2M 55

Soviet Space Program | Russia
Plesetsk Cosmodrome, Russian Federation
March 26, 1975, 8:50 a.m.
Status: Launch Successful
Mission:

The soviet Zenit-2M (Gektor, 11F690) was an improved version of the Zenit-2 area surveillance reconnaissance satellite. It was part of the Vostok-based Zenit-family.

Low Earth Orbit
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Soyuz U | Zenit-4MT 8

Russian Federal Space Agency (ROSCOSMOS) | Russia
Plesetsk Cosmodrome, Russian Federation
March 21, 1975, 6:50 a.m.
Status: Launch Successful
Mission:

Film-return reconnaissance satellite

Low Earth Orbit
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Voskhod | Zenit-4MK 38

Soviet Space Program | Russia
Baikonur Cosmodrome, Republic of Kazakhstan
March 12, 1975, 8:55 a.m.
Status: Launch Successful
Mission:

High resolution optical reconnaissance satellite of the Vostok-based Zenit family.

Low Earth Orbit
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Titan 34B | Jumpseat 4

Lockheed Martin | United States of America
Vandenberg SFB, CA, USA
March 10, 1975, 4:41 a.m.
Status: Launch Successful
Mission:

Signal intelligence satellite operating from highly elliptic Molniya-type orbits.

Elliptical Orbit
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