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Molniya-M | Molniya-1 29

Russian Space Forces | Russia
Plesetsk Cosmodrome, Russian Federation
April 29, 1975, 10:23 a.m.
Status: Launch Successful
Mission:

The Molniya were Soviet communication satellites operating from an inclined highly elliptical earth orbit of 500 km × 40000 km with 12 hour period for coverage of high northern latitudes.

Elliptical Orbit
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Voskhod | Zenit-4MK 41

Soviet Space Program | Russia
Plesetsk Cosmodrome, Russian Federation
April 24, 1975, 8:04 a.m.
Status: Launch Successful
Mission:

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

Low Earth Orbit
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Kosmos-3M | Zaliv 19

Russian Space Forces | Russia
Plesetsk Cosmodrome, Russian Federation
April 22, 1975, 9:10 p.m.
Status: Launch Successful
Mission:

The first soviet navigation system called Tsiklon consisted of Zaliv satellites in low earth orbit.

Low Earth Orbit
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Kosmos-3M | Aryabhata

Russian Space Forces | Russia
Kapustin Yar, Russian Federation
April 19, 1975, 7:58 a.m.
Status: Launch Successful
Mission:

First Indian scientific satellite

Low Earth Orbit
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Titan 24B | KH-8 44

Lockheed Martin | United States of America
Vandenberg SFB, CA, USA
April 18, 1975, 4:45 p.m.
Status: Launch Successful
Mission:

KH-8 Block 3 high resolution reconnaissance satellite.

Low Earth Orbit
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Voskhod | Zenit-2M 56

Soviet Space Program | Russia
Plesetsk Cosmodrome, Russian Federation
April 18, 1975, 10 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-4MK 40

Russian Federal Space Agency (ROSCOSMOS) | Russia
Baikonur Cosmodrome, Republic of Kazakhstan
April 16, 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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Molniya-M | Molniya-3 12L

Russian Space Forces | Russia
Plesetsk Cosmodrome, Russian Federation
April 14, 1975, 5:52 p.m.
Status: Launch Successful
Mission:

Molniya communication satellites operating from a highly elliptical orbit

Elliptical Orbit
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Atlas F | P72-2

Convair | United States of America
Vandenberg SFB, CA, USA
April 13, 1975, 12:51 a.m.
Status: Launch Failure
Mission:

Low-altitude experimental satellite carrying four experiments

Low Earth Orbit
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Kosmos-3M | Parus 2

Russian Space Forces | Russia
Plesetsk Cosmodrome, Russian Federation
April 11, 1975, 7:57 a.m.
Status: Launch Successful
Mission:

Navigation satellite providing location information for the Tsiklon-B navigation system

Low Earth Orbit
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