19754

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Chronology - 1975 - Quarter 4

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- 1975 October - Nation: Italy. Launch Site: Salto di Quirra . Launch Vehicle: Alfa.

Alfa 2
Second test flight of Italian submarine- and ship-launched ballistic missile. Dummy second stage.

- 1975 Oct 1 - - 08:38 GMT. Nation: USSR. Launch Site: Baikonur . Launch Vehicle: Voskhod 11A57.

Cosmos 774 Mass: 6,300 kg. Class: Surveillance. Type: Military. Spacecraft: Zenit-4MK. Perigee: 204 km. Apogee: 315 km. Inclination: 71.4 deg. Period: 89.7 min. COSPAR: 1975-095A. Duration: 14.00 days.
High resolution photo reconnaissance satellite; returned film capsule; maneuverable. References: 1 , 2 , 6 .

- 1975 Oct 1 - Nation: USSR. Launch Vehicle: Tsyklon 2.

US-A and Tsiklon-2 accepted into military service. Spacecraft: US-A.
Central Committee of the Communist Party and Council of Soviet Ministers Decree 'On adoption of US-A with Tsiklon-2 into armaments' was issued. References: 474 .

- 1975 Oct 6 - - 09:00 GMT. Nation: USA. Launch Site: Vandenberg . Launch Complex: SLC2W. Launch Vehicle: Delta 2914. LV Configuration: Delta 2910 s/n 600 / Delta s/n 115.

Explorer 54 Program: Explorer. Payload: AE D. Mass: 676 kg. Class: Earth. Type: Atmosphere. Spacecraft: AE. Agency: NASA. Perigee: 151 km. Apogee: 3,819 km. Inclination: 90.1 deg. Period: 126.8 min. COSPAR: 1975-096A.
Atmospheric Explorer; atmospheric research. Spacecraft engaged in research and exploration of the upper atmosphere or outer space (US Cat B). References: 1 , 2 , 5 , 6 .

- 1975 Oct 8 - - 00:30 GMT. Nation: USSR. Launch Site: Baikonur . Launch Complex: LC81L. Launch Vehicle: Proton 8K82K / 11S86. LV Configuration: Proton 8K82K s/n 286-02 / 11S86 .

Cosmos 775 Payload: SPRN No. 1. Mass: 2,000 kg. Class: Early Warning. Spacecraft: SPRN. Perigee: 35,721 km. Apogee: 35,812 km. Inclination: 13.6 deg. Period: 1,435.1 min. COSPAR: 1975-097A.
First launch of new geosynchronous ballistic missile early warning satellite. Exploded in orbit. References: 1 , 2 , 5 , 6 , 67 , 107 , 274 .

- 1975 Oct 9 - - 19:15 GMT. Nation: USA. Launch Site: Vandenberg . Launch Complex: SLC4W. Launch Vehicle: Titan 3B. LV Configuration: Titan 24B s/n 3B-47 (24B-13) / Agena D.

OPS 5499 Payload: KH-8 no. 45 / Agena D. Mass: 3,000 kg. Class: Surveillance. Type: Military. Spacecraft: KH-8. Agency: U.S. Air Force. Perigee: 145 km. Apogee: 274 km. Inclination: 96.4 deg. Period: 88.6 min. COSPAR: 1975-098A.
KH-8 type satellite. Space craft engaged in investigation of spaceflight techniques and technology (US Cat A). References: 1 , 2 , 5 , 6 .
SRV-1 Spacecraft: KH-8. COSPAR: 1975-098xx. References: 279 .
SRV-2 Spacecraft: KH-8. COSPAR: 1975-098xx. References: 279 .

- 1975 Oct 9 - Nation: USA.

X-24 Flight 59 Payload: X-24B flight 31. Class: Manned. Type: Spaceplane. Spacecraft: X-24B. Flight Crew: Enevoldson.
Maximum Speed - 724 kph. Maximum Altitude - 13720 m. Flight Time - 251 sec. References: 49 , 97 .

- 1975 Oct 12 - - 06:39 GMT. Nation: USA. Launch Site: Vandenberg . Launch Complex: SLC5. Launch Vehicle: Scout D. LV Configuration: Scout D-1 s/n S195C.

Triad 2 Program: Transit. Payload: TIP 2. Mass: 94 kg. Class: Navigation. Spacecraft: TIP. Agency: U.S. Navy. Perigee: 427 km. Apogee: 490 km. Inclination: 90.4 deg. Period: 93.8 min. COSPAR: 1975-099A.
Prototype of improved Transit satellite. Tested pulsed plasma engine. References: 1 , 2 , 5 , 6 .

- 1975 Oct 16 - - 22:40 GMT. Nation: USA. Launch Site: Cape Canaveral . Launch Complex: LC17B. Launch Vehicle: Delta 2914. LV Configuration: Delta 2914 s/n 597 / Delta s/n 116.

GOES 1 Payload: GOES A. Mass: 295 kg. Class: Earth. Type: Weather. Spacecraft: GOES. Agency: NASA. Perigee: 35,779 km. Apogee: 35,795 km. Inclination: 12.4 deg. Period: 1,436.1 min. COSPAR: 1975-100A.
Geostationary Operational Environmental Satellite. Spacecraft engaged in research and exploration of the upper atmosphere or outer space (US Cat B). References: 1 , 2 , 5 , 6 .

- 1975 Oct 16 - - 04:04 GMT. Nation: USSR. Launch Site: Baikonur . Launch Complex: LC81L. Launch Vehicle: Proton 8K82K / 11S824. LV Configuration: Proton 8K82K s/n 287-02 / 11S824 . FAILURE: Block D failure.

Ye-8-5M s/n 412 Program: Luna. Payload: Ye-8-5M s/n 412. Mass: 5,300 kg. Class: Planetary. Type: Lunar. Spacecraft: Luna Ye-8-5M. COSPAR.
Attempted robotic lunar soil return mission. Block D stage failed. References: 5 , 67 , 274 .
Ye-8-5M VA Program: Luna. Payload: VA. Spacecraft: Luna Ye-8-5. COSPAR. References: 279 .

- 1975 Oct 17 - - 14:38 GMT. Nation: USSR. Launch Site: Plesetsk . Launch Vehicle: Voskhod 11A57.

Cosmos 776 Mass: 6,000 kg. Class: Surveillance. Type: Military. Spacecraft: Zenit-2M. Perigee: 200 km. Apogee: 288 km. Inclination: 62.8 deg. Period: 89.4 min. COSPAR: 1975-101A. Duration: 12.00 days.
Area survey photo reconnaissance satellite; returned film capsule; separated science capsule. References: 1 , 2 , 6 .
Nauka Cosmos 776 Payload: Nauka. Spacecraft: Nauka. COSPAR: 1975-101D. References: 279 .

- 1975 Oct 17 - Nation: USA. Launch Vehicle: Shuttle.

Shuttle SSME first test. Program: STS.
Space shuttle main engine first main stage test at NSTL References: 15 .

- 1975 Oct 21 - Nation: USA.

X-24 Flight 60 Payload: X-24B flight 32. Class: Manned. Type: Spaceplane. Spacecraft: X-24B. Flight Crew: Scobee.
Maximum Speed - 743 kph. Maximum Altitude - 13720 m. Flight Time - 255 sec. References: 49 , 97 .

- 1975 Oct 29 - - 11:02 GMT. Nation: USSR. Launch Site: Baikonur . Launch Complex: LC90. Launch Vehicle: Tsyklon 2.

Cosmos 777 Program: EORSAT. Payload: US-P no. 2 Test. Mass: 3,000 kg. Class: ELINT. Type: Naval reconnaisance. Spacecraft: US-P. Perigee: 425 km. Apogee: 442 km. Inclination: 65.0 deg. Period: 93.3 min. COSPAR: 1975-102A.
Ocean monitoring; exploded 1/76. References: 1 , 2 , 5 , 6 .

- 1975 Oct 31 - Nation: USA.

Enterprise lower fuselage complete. Program: STS. Class: Manned. Type: Spaceplane. Spacecraft: Enterprise.
Lower forward fuselage on dock, Palmdale, Enterprise (OV-101) References: 15 .

- 1975 Nov 3 - Nation: USA.

X-24 Flight 61 Payload: X-24B flight 33. Class: Manned. Type: Spaceplane. Spacecraft: X-24B. Flight Crew: McMurtry.
Maximum Speed - 734 kph. Maximum Altitude - 13720 m. Flight Time - 248 sec. References: 49 , 97 .

- 1975 Nov 4 - - 10:04 GMT. Nation: USSR. Launch Site: Plesetsk . Launch Complex: LC132. Launch Vehicle: Kosmos 11K65M. LV Configuration: Kosmos 11K65M s/n 53731-275.

Cosmos 778 Mass: 810 kg. Class: Navigation. Spacecraft: Parus. Perigee: 966 km. Apogee: 999 km. Inclination: 83.0 deg. Period: 104.7 min. COSPAR: 1975-103A.
Military navigation satellite. References: 1 , 2 , 5 , 6 .

- 1975 Nov 4 - - 15:21 GMT. Nation: USSR. Launch Site: Plesetsk . Launch Vehicle: Voskhod 11A57.

Cosmos 779 Mass: 6,300 kg. Class: Surveillance. Type: Military. Spacecraft: Zenit-4MK. Perigee: 182 km. Apogee: 341 km. Inclination: 62.8 deg. Period: 89.7 min. COSPAR: 1975-104A. Duration: 14.00 days.
High resolution photo reconnaissance satellite; returned film capsule; maneuverable. References: 1 , 2 , 6 .

- 1975 Nov 5 - Nation: USA. Launch Vehicle: Thor. LV Configuration: Thor 274.

Thor 274
BMDTTP 2

- 1975 Nov 12 - Nation: USA.

X-24 Flight 62 Payload: X-24B flight 34. Class: Manned. Type: Spaceplane. Spacecraft: X-24B. Flight Crew: Enevoldson.
Maximum Speed - 734 kph. Maximum Altitude - 13720 m. Flight Time - 241 sec. References: 49 , 97 .

- 1975 Nov 14 - - 19:14 GMT. Nation: USSR. Launch Site: Plesetsk . Launch Complex: LC43/3. Launch Vehicle: Molniya 8K78M.

Molniya 3-03 Program: Molniya. Payload: Molniya-3 s/n 13. Mass: 1,600 kg. Class: Communications. Spacecraft: Molniya-3. Perigee: 859 km. Apogee: 39,489 km. Inclination: 61.7 deg. Period: 717.7 min. COSPAR: 1975-105A.
Continued operation of the long-range telephone and telegraph radio-communication system within the Soviet Union and transmission of USSR central television programmes to stations in the Orbita and participating international networks (international coope ration scheme). References: 1 , 2 , 5 , 6 .

- 1975 Nov 17 - Nation: USA.

Columbia crew module started. Program: STS. Class: Manned. Type: Spaceplane. Spacecraft: Columbia.
Start long-lead fabrication of crew module, Columbia (OV-102) References: 15 .

- 1975 Nov 17 - - 14:37 GMT. Nation: USSR. Launch Site: Baikonur . Launch Vehicle: Soyuz 11A511U.

Soyuz 20 Program: Salyut. Payload: Soyuz 7K-T(A9) s/n 64. Mass: 6,700 kg. Class: Manned. Type: Spacecraft. Spacecraft: Soyuz 7K-T/A9. Perigee: 184 km. Apogee: 251 km. Inclination: 51.6 deg. Period: 88.8 min. COSPAR: 1975-106A. Duration: 90.49 days.
Unmanned long duration test of the Soyuz transport vehicle; docked with Salyut 4. Recovered February 16, 1976 2:24 GMT. Comprehensive checking of improved on-board systems of the space craft under various flight conditions. Carried a biological payload. Living organisms were exposed to three months in space. References: 1 , 2 , 6 , 445 .

- 1975 Nov 19 - Nation: USA.

X-24 Flight 63 Payload: X-24B flight 35. Class: Manned. Type: Spaceplane. Spacecraft: X-24B. Flight Crew: Scobee.
Maximum Speed - 740 kph. Maximum Altitude - 13720 m. Flight Time - 249 sec. References: 49 , 97 .

- 1975 Nov 20 - - 02:06 GMT. Nation: USA. Launch Site: Cape Canaveral . Launch Complex: LC17B. Launch Vehicle: Delta 2914. LV Configuration: Delta 2910 s/n 604 / Delta s/n 117.

Explorer 55 Program: Explorer. Payload: AE E. Mass: 721 kg. Class: Earth. Type: Atmosphere. Spacecraft: AE. Agency: NASA. Perigee: 154 km. Apogee: 3,002 km. Inclination: 19.7 deg. Period: 117.7 min. COSPAR: 1975-107A.
Atmospheric Explorer. Spacecraft engaged in research and exploration of the upper atmosphere or outer space (US Cat B). References: 1 , 2 , 5 , 6 .

- 1975 Nov 21 - - 09:21 GMT. Nation: USSR. Launch Site: Baikonur . Launch Vehicle: Voskhod 11A57.

Cosmos 780 Mass: 6,000 kg. Class: Surveillance. Type: Military. Spacecraft: Zenit-2M. Perigee: 201 km. Apogee: 278 km. Inclination: 65.0 deg. Period: 89.3 min. COSPAR: 1975-108A. Duration: 12.00 days.
Area survey photo reconnaissance satellite; returned film capsule; separated science capsule. References: 1 , 2 , 6 .

- 1975 Nov 21 - - 17:16 GMT. Nation: USSR. Launch Site: Plesetsk . Launch Complex: LC132. Launch Vehicle: Kosmos 11K65M. LV Configuration: Kosmos 11K65M s/n 53731-271.

Cosmos 781 Program: Tselina. Mass: 900 kg. Class: ELINT. Spacecraft: Tselina-O. Perigee: 499 km. Apogee: 563 km. Inclination: 74.0 deg. Period: 95.2 min. COSPAR: 1975-109A.
Replaced Cosmos 698. Investigation of the upper atmosphere and outer space. References: 1 , 2 , 5 , 6 .

- 1975 Nov 21 - - 09:21 GMT. Nation: USSR. Launch Vehicle: Voskhod 11A57.

Nauka Cosmos 780 Payload: Nauka. Spacecraft: Nauka. COSPAR: 1975-108D. References: 279 .

- 1975 Nov 25 - - 17:00 GMT. Nation: USSR. Launch Site: Plesetsk . Launch Complex: LC43/3. Launch Vehicle: Soyuz 11A511U.

Cosmos 782 Payload: Bion no. 3. Mass: 6,000 kg. Class: Biology. Spacecraft: Bion. Perigee: 218 km. Apogee: 384 km. Inclination: 62.8 deg. Period: 90.5 min. COSPAR: 1975-110A. Duration: 19.50 days.
Biological research. Continued investigation of the effects of space flight on living organisms. Capsule recovered 52 deg 17 min N, 64 deg 11 min E. The Cosmos 782 mission marked the first time that the United States participated in the Soviet Cosmos Program. Scientists from France, Czechoslovakia, Hungary, Poland, Romania, the U.S. and the U.S.S.R. participated in these investigations. Additional Details: Cosmos 782. References: 1 , 2 , 6 , 104 , 297 .

- 1975 Nov 26 - - 03:29 GMT. Nation: China. Launch Site: Jiuquan . Launch Complex: LA2. Launch Vehicle: CZ-2C. LV Configuration: Chang Zheng 2C s/n CZ2C-1.

China 4 Payload: FSW-1 No. 01. Mass: 2,500 kg. Class: Surveillance. Type: Military. Spacecraft: FSW. Perigee: 183 km. Apogee: 483 km. Inclination: 63.0 deg. Period: 91.1 min. COSPAR: 1975-111A.
Photo surveillance; film capsule. References: 1 , 2 , 5 , 6 .
FSW RV Spacecraft: FSW. COSPAR: 1975-111xx. References: 279 .

- 1975 Nov 26 - Nation: USA.

X-24 Flight 64 Payload: X-24B flight 36. Class: Manned. Type: Spaceplane. Spacecraft: X-24B. Flight Crew: McMurtry.
Maximum Speed - 740 kph. Maximum Altitude - 13720 m. Flight Time - 245 sec. References: 49 , 97 .

- 1975 Nov 28 - - 00:14 GMT. Nation: USSR. Launch Site: Plesetsk . Launch Complex: LC132. Launch Vehicle: Kosmos 11K65M. LV Configuration: Kosmos 11K65M s/n 53721-252.

Cosmos 783 Program: Strela. Mass: 750 kg. Class: Communications. Type: Military Store-dump. Spacecraft: Strela-2M. Perigee: 779 km. Apogee: 797 km. Inclination: 74.1 deg. Period: 100.6 min. COSPAR: 1975-112A. References: 1 , 2 , 5 , 6 .

- 1975 Dec 1 - Nation: USA.

Enterprise upper forward fuselage complete. Program: STS. Class: Manned. Type: Spaceplane. Spacecraft: Enterprise.
Upper forward fuselage on dock, Palmdale, Enterprise (OV-101) References: 15 .

- 1975 Dec 3 - - 10:04 GMT. Nation: USSR. Launch Site: Plesetsk . Launch Vehicle: Voskhod 11A57.

Cosmos 784 Mass: 6,000 kg. Class: Surveillance. Type: Military. Spacecraft: Zenit-2M. Perigee: 215 km. Apogee: 231 km. Inclination: 81.3 deg. Period: 88.9 min. COSPAR: 1975-113A. Duration: 12.00 days.
Area survey photo reconnaissance satellite; returned film capsule; separated science capsule. References: 1 , 2 , 6 .
Nauka Cosmos 784 Payload: Nauka. Spacecraft: Nauka. COSPAR: 1975-113G. References: 279 .

- 1975 Dec 4 - - 20:38 GMT. Nation: USA. Launch Site: Vandenberg . Launch Complex: SLC4E. Launch Vehicle: Titan 3D. LV Configuration: Titan 3D s/n 23D-13.

KH 9-11 Subsatellite Payload: SSF 9. Mass: 60 kg. Class: ELINT. Spacecraft: SSF. Agency: U.S. Air Force. Perigee: 236 km. Apogee: 1,558 km. Inclination: 96.3 deg. Period: 103.0 min. COSPAR: 1975-114B.
Not identified as a subsatellite ferret by McDowell. References: 1 , 2 , 5 , 6 , 172 .
KH-9 no. 11 Mass: 13,300 kg. Class: Surveillance. Type: Military. Spacecraft: KH-9. Agency: U.S. Air Force. Perigee: 157 km. Apogee: 234 km. Inclination: 96.3 deg. Period: 88.4 min. COSPAR: 1975-114A.
KH-9 type satellite. Space craft engaged in investigation of spaceflight techniques and technology (US Cat A). References: 1 , 2 , 5 , 6 .
SRV-1 Mass: 11,400 kg. Spacecraft: KH-9. COSPAR: 1975-114xx. References: 279 .
SRV-2 Mass: 11,400 kg. Spacecraft: KH-9. COSPAR: 1975-114xx. References: 279 .
SRV-3 Mass: 11,400 kg. Spacecraft: KH-9. COSPAR: 1975-114xx. References: 279 .
SRV-4 Mass: 11,400 kg. Spacecraft: KH-9. COSPAR: 1975-114xx. References: 279 .

- 1975 Dec 6 - - 03:35 GMT. Nation: USA. Launch Site: Vandenberg . Launch Complex: SLC5. Launch Vehicle: Scout F. LV Configuration: Scout F-1 s/n S196C. FAILURE: Failure.

DAD-B Program: Explorer. Payload: DAD-B. Spacecraft: DAD. COSPAR. References: 279 .
Explorer (56) Program: Explorer. Payload: DAD-A. Mass: 71 kg. Class: Earth. Type: Atmosphere. Spacecraft: DAD. Agency: NASA. COSPAR.
Dual Air Density; air density experiments. References: 5 , 126 .

- 1975 Dec 11 - - 17:00 GMT. Nation: USSR. Launch Site: Plesetsk . Launch Complex: LC132/1. Launch Vehicle: Kosmos 11K65M. LV Configuration: Kosmos 11K65M s/n 53746-308.

Intercosmos 14 Program: DS. Payload: DS-U2-IK s/n 6. Mass: 700 kg. Class: Earth. Type: Ionosphere. Spacecraft: DS-U2-IK. Perigee: 335 km. Apogee: 1,684 km. Inclination: 74.0 deg. Period: 105.3 min. COSPAR: 1975-115A. Completed Operations Date: 09 July 1976.
Study of low-frequency electromagnetic vibrations in the magnetosphere of the earth, of the structure of the ionosphere and of the intensity of micrometeorite fluxes. References: 1 , 2 , 5 , 6 , 99 , 116 .

- 1975 Dec 12 - - 12:43 GMT. Nation: USSR. Launch Site: Baikonur . Launch Complex: LC90. Launch Vehicle: Tsyklon 2.

Cosmos 785 Program: RORSAT. Payload: US-A no. 12. Mass: 3,800 kg. Class: Surveillance. Type: Naval Radarsat. Spacecraft: US-A. Perigee: 907 km. Apogee: 1,004 km. Inclination: 65.1 deg. Period: 104.2 min. COSPAR: 1975-116C.
Ocean surveillance; nuclear powered; failed immediately after reaching orbit. References: 1 , 2 , 5 , 6 .

- 1975 Dec 13 - - 01:56 GMT. Nation: USA. Launch Site: Cape Canaveral . Launch Complex: LC17A. Launch Vehicle: Delta 3914. LV Configuration: Delta 3914 s/n 607 / Delta s/n 118.

Satcom 1 Program: Satcom. Mass: 464 kg. Class: Communications. Spacecraft: AS 1000. Agency: GE Americom. Manufacturer: Lockheed Martin. Perigee: 35,868 km. Apogee: 36,089 km. Inclination: 8.9 deg. Period: 1,446.0 min. COSPAR: 1975-117A. References: 1 , 2 , 5 , 6 .

- 1975 Dec 14 - - 05:15 GMT. Nation: USA. Launch Site: Cape Canaveral . Launch Complex: LC40. Launch Vehicle: Titan 3C. LV Configuration: Titan 3C s/n 23C-11.

IMEWS 5 Payload: DSP s/n 7. Mass: 820 kg. Class: Early Warning. Spacecraft: IMEWS. Agency: U.S. Air Force. Perigee: 35,671 km. Apogee: 35,785 km. Inclination: 3.0 deg. Period: 1,436.0 min. COSPAR: 1975-118A. References: 1 , 2 , 5 , 6 , 127 .

- 1975 Dec 16 - - 09:19 GMT. Nation: China. Launch Site: Jiuquan . Launch Complex: LA2. Launch Vehicle: FB-1. LV Configuration: Feng Bao 1 s/n FB1-5.

China 5 Payload: JSSW 4. Mass: 1,110 kg. Class: Surveillance. Type: Military. Spacecraft: JSSW. Perigee: 186 km. Apogee: 387 km. Inclination: 69.0 deg. Period: 90.3 min. COSPAR: 1975-119A.
Photo surveillance; radio transmission. References: 1 , 2 , 5 , 6 .

- 1975 Dec 16 - - 09:50 GMT. Nation: USSR. Launch Site: Baikonur . Launch Vehicle: Voskhod 11A57.

Cosmos 786 Mass: 6,300 kg. Class: Surveillance. Type: Military. Spacecraft: Zenit-4MK. Perigee: 184 km. Apogee: 325 km. Inclination: 65.0 deg. Period: 89.5 min. COSPAR: 1975-120A. Duration: 13.00 days.
High resolution photo reconnaissance satellite; returned film capsule; maneuverable. References: 1 , 2 , 6 .

- 1975 Dec 17 - - 11:16 GMT. Nation: USSR. Launch Site: Plesetsk . Launch Vehicle: Molniya 8K78M.

Molniya 2-15 Program: Molniya. Payload: Molniya-2. Mass: 1,600 kg. Class: Communications. Spacecraft: Molniya-2. Perigee: 103 km. Apogee: 24,113 km. Inclination: 62.8 deg. Period: 416.9 min. COSPAR: 1975-121A.
Continued operation of the long-range telephone and telegraph radio-communication system within the Soviet Union and transmission of USSR central television programmes to stations in the Orbita and participating international networks (international coope ration scheme). References: 1 , 2 , 5 , 6 .

- 1975 Dec 19 - Nation: USSR. Launch Site: Plesetsk . Launch Complex: LC132. Launch Vehicle: Kosmos 11K65M. LV Configuration: Kosmos 11K65M s/n 53721-263. FAILURE: Launch vehicle failed to orbit - unknown cause.

I2P Program: ASAT. Class: Military. Type: ASAT Target. Spacecraft: IS-P. COSPAR.

- 1975 Dec 20 - Nation: USA. Launch Vehicle: Shuttle.

First SSME 60-second duration test, NSTL Program: STS. References: 15 .

- 1975 Dec 22 - - 02:09 GMT. Nation: USSR. Launch Site: Baikonur . Launch Vehicle: Molniya 8K78M. LV Configuration: Molniya 8K78M / SOL.

Prognoz 4 Payload: SO-M s/n 504. Mass: 905 kg. Class: Earth. Type: Magnetosphere. Spacecraft: Prognoz. Perigee: 634 km. Apogee: 199,000 km. Inclination: 65.0 deg. Period: 5,740.0 min. COSPAR: 1975-122A.
Investigation of the corpuscular and electromagnetic radiation of the sun and of solar plasma fluxes, study of the magnetic fields in circumterrestrial space in order to determine the effects of solar activity on the interplanetary medium and in the magne tosphere of the earth. References: 1 , 2 , 5 , 6 .

- 1975 Dec 22 - - 13:00 GMT. Nation: USSR. Launch Site: Baikonur . Launch Complex: LC81P. Launch Vehicle: Proton 8K82K / 11S86. LV Configuration: Proton 8K82K s/n 288-01 / 11S86 s/n 3L.

Raduga 1 Payload: Raduga s/n 11L. Mass: 1,940 kg. Class: Communications. Type: Military. Spacecraft: Raduga . Perigee: 35,758 km. Apogee: 35,807 km. Inclination: 13.3 deg. Period: 1,435.9 min. COSPAR: 1975-123A.
Statsionar-1. Provision of uninterrupted round-the-clock telephone and telegraph radio-communications system in the USSR, transmission of USSR central television programmes to stations in the Orbita network and international cooperation. References: 1 , 2 , 5 , 6 , 67 , 274 .

- 1975 Dec 25 - - 18:57 GMT. Nation: USSR. Launch Site: Plesetsk . Launch Vehicle: Vostok 8A92M.

Meteor 1-23 Payload: Meteor M no. 23. Mass: 3,800 kg. Class: Earth. Type: Weather. Spacecraft: Meteor M. Perigee: 849 km. Apogee: 868 km. Inclination: 81.2 deg. Period: 102.1 min. COSPAR: 1975-124A.
Acquisition of meteorological information needed for use by the weather service. References: 1 , 2 , 5 , 6 .

- 1975 Dec 27 - - 10:22 GMT. Nation: USSR. Launch Site: Plesetsk . Launch Complex: LC43/3. Launch Vehicle: Molniya 8K78M.

Molniya 3-04 Program: Molniya. Payload: Molniya-3 no. s/n 15. Mass: 1,600 kg. Class: Communications. Spacecraft: Molniya-3. Perigee: 452 km. Apogee: 40,708 km. Inclination: 62.8 deg. Period: 733.8 min. COSPAR: 1975-125A.
Decay date suspect Continued operation of the long-range telephone and telegraph radio-communication system within the Soviet Union and transmission of USSR central television programmes to stations in the Orbita and participating international networks (international cooperation scheme). References: 1 , 2 , 5 , 6 .

- 1975 Dec 31 - Nation: USA.

Shuttle 1/4-scale model ground vibration test Program: STS.
1/4-scale model ground vibration test facility construction starts. References: 15 .

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