Orbiting Vehicle Series 1 and 3 (OV1 and OV3)
"The OV1-19 (1969-25 C) was launched 18 March 1969 into an elliptical orbit (3111. 1 x 250. 1 N. Mi.) with an inclination of 104.8º. Initial spin period was about 7 seconds (the spin was used to stabilize the spacecraft and also served a scanning function for directional detectors), increasing to over 10 seconds. Data was obtained both real-time and with a 4-hour tape recorder, although only the latter data was reduced for analysis routinely. The experiments included a small set of omnidirectional proton-electron spectrometers, a directional proton spectrometer, a Faraday Cup, magnetic electron spectrometers, dE/dX, E telescope, a Lyman-Alpha scanner, VLF receivers, and several dosimeters. Approximately 360 playbacks of the 4-hour tape recorder are available from the satellite over an 11-month period. This period encompasses several solar particle events plus several large isolated magnetic storms."  "NORAD ID: 3825 Int'l Code: 1969-025C Perigee: 491.9 km Apogee: 5,541.8 km Inclination: 104.7° Period: 150.9 min Semi major axis: 9,387.8 km Launch date: March 18, 1969"  "The OV1 (Orbiting Vehicle 1) were small research satellite to be launched piggy back on Atlas ICBM test flights. They consisted in general of the OV1 satellite and the OV1-PM propulsion module (or upper stage) to reach orbit. Only OV1-1 and OV1-3 were launched on an ICBM, while all other Atlas flights were dedicated launches." 
- Satellite: OV1-19 | OV3-3
- RB-related instruments: OV1-19/MES | OV3-3/MES
- Numerical data: OV1-19/MES OV3-3/MES
- File readers: http://virbo.org/svn/virbo/ov
See ftp://virbo.org/users/obrien/ov33/cd/BROWSE.HTM for more information.
See ftp://virbo.org/users/obrien/ov119/cd/MES/README for more information.