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Soyuz U | Zenit-2M 77

Russian Federal Space Agency (ROSCOSMOS) | Russia
Baikonur Cosmodrome, Republic of Kazakhstan
May 31, 1977, 7:30 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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Kosmos-3M | Taifun-2 3

Russian Space Forces | Russia
Plesetsk Cosmodrome, Russian Federation
May 30, 1977, 10:30 p.m.
Status: Launch Successful
Mission:

Taifun-2 satellite used to release up to 24 subsatellites for radar and sensor calibration

Low Earth Orbit
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Atlas SLV-3D Centaur | Intelsat-4A 4

Convair | United States of America
Cape Canaveral SFS, FL, USA
May 26, 1977, 9:47 p.m.
Status: Launch Successful
Mission:

Geostationary communications satellite developed by Hughes Aircraft Company

Geostationary Orbit
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Soyuz U | Zenit-4MKT 4

Russian Federal Space Agency (ROSCOSMOS) | Russia
Plesetsk Cosmodrome, Russian Federation
May 26, 1977, 7 a.m.
Status: Launch Successful
Mission:

Film-return reconnaissance satellite

Low Earth Orbit
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Kosmos-3M | Sfera 16

Russian Space Forces | Russia
Plesetsk Cosmodrome, Russian Federation
May 25, 1977, 11 a.m.
Status: Launch Successful
Mission:

The Sfera or Geoid series were the first soviet geodetic satellites to improve the accuracy of maps. The development of the satellites started in 1965 at NPO-PM.

Low Earth Orbit
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Atlas SLV-3A Agena D | Canyon 7

Convair | United States of America
Cape Canaveral SFS, FL, USA
May 23, 1977, 6:13 p.m.
Status: Launch Successful
Mission:

Canyon was the first series of NRO's near geostationary ELINT/SIGINT satellites launched under the designation AFP-827 or Program 7500 for NRO's Program A. They were focussed on communications intelligence (COMINT).

Geostationary Orbit
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Tsiklon-2 | IS-A 5

Yuzhnoye Design Bureau | Ukraine
Baikonur Cosmodrome, Republic of Kazakhstan
May 23, 1977, 12:14 p.m.
Status: Launch Successful
Mission:

Second generation ASAT satellite

Low Earth Orbit
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Kosmos-3M | DS-P1-M 11

Russian Space Forces | Russia
Plesetsk Cosmodrome, Russian Federation
May 19, 1977, 4:30 p.m.
Status: Launch Successful
Mission:

ASAT target satellite

Low Earth Orbit
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Soyuz U | Zenit-4MK 78

Russian Federal Space Agency (ROSCOSMOS) | Russia
Baikonur Cosmodrome, Republic of Kazakhstan
May 17, 1977, 10:10 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 IIIC | DSCS-2 7 & 8

Lockheed Martin | United States of America
Cape Canaveral SFS, FL, USA
May 12, 1977, 2:26 p.m.
Status: Launch Successful
Mission:

Satellites designed to provide secure voice and data communications for the US military.

Geostationary Orbit
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