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OV5

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OV5 Credit: Manufacturer Image

Status: Operational 1967. First Launch: 1967-04-28. Last Launch: 1969-05-23. Number: 8 . Gross mass: 9.00 kg (19.80 lb).

The octagonal Environmental Research Satellites were designed for piggyback launching from large primary mission vehicles. Ranging in mass from 0.7 to 45 kg, and carrying from 1 to 14 experiments, the ERS spacecraft provided an inexpensive, flexible vehicle capable of making scientific and engineering measurements in space.

A major role of the ERS satellites was to act as a test bed to determine the reliability of improved components and subsystems destined for use in later generations of spacecraft. A unique feature of the system was its capability to function without a battery. The key to this advantage was the design which permitted solar cells, fastened to all exterior surfaces of the vehicle, to maintain constant exposure of about 15 percent of the sun. The ERS was a small satellite, measuring in one version only 22 cm on a side and weighing 680 g; the larger version weighed 45 kg and was a 51 cm diameter cylinder. The 8-sided version was designated the OV-5 and became a part of a program conducted by the Air Force Office of Aerospace Research. Prime Contractor was TRW Systems Group of TRW Inc.

• OV5-03 - . Payload: ERS 20. Mass: 9.00 kg (19.80 lb). Nation: USA. Agency: USAF. Class: Earth. Type: Magnetosphere satellite. Spacecraft: OV5. USAF Sat Cat: 2768 . COSPAR: 1967-040D. Apogee: 111,229 km (69,114 mi). Perigee: 8,604 km (5,346 mi). Inclination: 32.80 deg. Period: 2,829.60 min. Radiation research; deployed ERS 20. Space craft engaged in investigation of spaceflight techniques and technology (US Cat A). .

• OV5-01 - . Payload: ERS 27. Mass: 9.00 kg (19.80 lb). Nation: USA. Agency: USAF. Class: Earth. Type: Magnetosphere satellite. Spacecraft: OV5. USAF Sat Cat: 2769 . COSPAR: 1967-040E. Apogee: 110,746 km (68,814 mi). Perigee: 8,979 km (5,579 mi). Inclination: 32.80 deg. Period: 2,827.80 min. Materials research; deployed ERS 27. Space craft engaged in investigation of spaceflight techniques and technology (US Cat A). .

• OV5-8 - . Payload: OV5-8. Nation: USA. Agency: USAF AFSC. Spacecraft: OV5.

• OV5-04 - . Payload: ERS 21. Mass: 13 kg (28 lb). Nation: USA. Agency: USAF. Class: Earth. Type: Magnetosphere satellite. Spacecraft: OV5. Completed Operations Date: 1968-09-01 . USAF Sat Cat: 3430 . COSPAR: 1968-081C. Apogee: 35,786 km (22,236 mi). Perigee: 35,775 km (22,229 mi). Inclination: 3.00 deg. Period: 1,435.80 min. Examined heat transfer in liquids in zero-g. Space craft engaged in investigation of spaceflight techniques and technology (US Cat A). Last known longitude (19 July 1995) 138.85 deg E drifting at 0.103 deg W per day..

• OV5-02 - . Payload: ERS 28. Mass: 10 kg (22 lb). Nation: USA. Agency: USAF. Class: Earth. Type: Magnetosphere satellite. Spacecraft: OV5. Decay Date: 1971-02-15 . USAF Sat Cat: 3429 . COSPAR: 1968-081B. Apogee: 35,786 km (22,236 mi). Perigee: 184 km (114 mi). Inclination: 26.40 deg. Period: 630.80 min. Particle radiation data. Space craft engaged in investigation of spaceflight techniques and technology (US Cat A). .

• OV5-05 - . Payload: ERS 29. Mass: 259 kg (570 lb). Nation: USA. Agency: USAF. Class: Earth. Type: Magnetosphere satellite. Spacecraft: OV5. USAF Sat Cat: 3950 . COSPAR: 1969-046A. Apogee: 69,130 km (42,950 mi). Perigee: 59,630 km (37,050 mi). Inclination: 33.00 deg. Period: 3,121.90 min.

  The 13th, and final, Titan IIIC research and development booster (Vehicle #15) lifted two Vela satellites, the fifth pair of such nuclear detection spacecraft, and three experimental satellites into orbit from Cape Canaveral. This launch concluded the highly successful Titan III research and development program initiated in 1962. Out of 13 Titan IIIC and four Titan IITA vehicles launched, 10 Titan IITCs were complete successes, two were partial successes, and only one was a failure, while three of the four Titan IITA launches were rated successful. Space craft engaged in investigation of spaceflight techniques and technology (US Cat A).

• OV5-09 - . Mass: 11 kg (24 lb). Nation: USA. Agency: USAF. Class: Earth. Type: Magnetosphere satellite. Spacecraft: OV5. USAF Sat Cat: 3952 . COSPAR: 1969-046C. Apogee: 69,011 km (42,881 mi). Perigee: 59,543 km (36,998 mi). Inclination: 33.50 deg. Period: 3,115.10 min. VLF plasma wave detection. Space craft engaged in investigation of spaceflight techniques and technology (US Cat A). .

• OV5-06 - . Payload: ERS 26. Mass: 259 kg (570 lb). Nation: USA. Agency: USAF. Class: Earth. Type: Magnetosphere satellite. Spacecraft: OV5. USAF Sat Cat: 3951 . COSPAR: 1969-046B. Apogee: 69,022 km (42,888 mi). Perigee: 59,540 km (36,990 mi). Inclination: 33.60 deg. Period: 3,115.40 min. Space craft engaged in investigation of spaceflight techniques and technology (US Cat A)..