OAO-B /To be launched no earlier than 17 November 1970/ - Press kit
OAO-B mission plans, launch vehicle, launch operations, and equipment
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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Low temperature overcharge on the OAO battery and cells
Low temperature overcharge voltage characteristics of OAO batteries and cells
Gaston, S.↗
Use of Centaur spacecraft flight data in the synthesis of forcing functions at Centaur main engine cutoff during boost of Mariner Mars 1969, OAO 2, and ATS spacecraft. Volume 1 - Analysis and evaluation
Numerical analysis of acceleration flight data of Mariner Mars 69, OAO 2, and ATS to determine disturbing forcing function of Centaur engines at main engine cutoffs
Chisholm, J. R.↗
Use of Centaur spacecraft flight data in the synthesis of forcing functions at Centaur main engine cutoff during boost of Mariner Mars 1969, OAO 2, and ATS spacecraft. Volume 2 - Computer plots
Computer plots of acceleration flight data of Mariner Mars 69, OAO 2, and ATS showing selected gimbal axis forcing functions and dynamic response of Centaur main engine cutoffs
Chisholm, J. R.↗
Thermal cycling effects on solar cell interconnection tabs on an OAO-B sample module
Thermal cycling tests of bent solar cell interconnection tabs on OAO module
Vermillion, C. M.↗
Instrumentation for the OAO experiments
OAO experiments instrument packages for UV observations from orbit, discussing telescopes pointing accuracy and stability, mission objectives, etc
White, W. A.↗
OAO ground system and operations
OAO for observations of stars, galaxies, planets and nebulae, discussing ground system and men and data systems integration
Osler, S. J.↗
The OAO simulation system
OAO simulation system including prototype spacecraft and digital computer for verifying ground system performance
Haykin, D. J., Jr.↗
Reliability and the thermal testing of the OAO 2
OAO 2 thermal test reliability analysis, using filtering process to eliminate component and subsystem level failures
Caruso, P. S., Jr.↗
Experimental high performance heat pipes for the OAO-C spacecraft
Design and performance testing of arterial wick circular heat pipes for OAO-C spacecraft
Bienert, W.↗
OAO observations of magnesium II emission in late-type stars
Stellar chromosphere characteristics from OAO observation of magnesium II emission in late type stars
Doherty, L. R.↗
An On Board Processor (OBP) for OAO C
A stored program computer and its application on OAO is considered. The parallel computer has a memory capacity of 16,384 words of 18 bits each, one central processor unit, two 4096 word memory units, and one input/output unit. The I/O has no direct data connection with the CPU so that all data flow between these two units must pass through memory by way of the memory data bus. The primary functions of the onboard computer are auxiliary command storage, spacecraft monitoring and malfunction reporting, data compression and status summary, and possible performance of emergency corrective action.
Hartenstein, R. G.↗
Techniques associated with thermal-vacuum testing of the OAO C heat pipes
The mechanical problems associated with the testing of two heat pipes installed in the OAO C spacecraft are described. The test problems discussed concern the specially designed heat removal devices, the mobile tilt table, the table position indicator, and the heat input machanisms. It was determined that the techniques used were adequate for thermal-vacuum testing of heat pipes.
Marshburn, J. P.↗
The scientific results from the Orbiting Astronomical Observatory (OAO-2)
Conference on scientific observations by OAO 2 of solar system, interstellar matter, stellar atmospheres, and galactic and extragalactic systems
Code, A. D.↗
Engineering report on the OAO-2 Wisconsin experiment package
The continued useful operation of the OAO-2 Wisconsin Experiment Package (WEP) for almost three years after its December 1968 launch is evidence of a superior engineering accomplishment. Reliability features of the experiment concept and design which have contributed to its long life are presented. Data anomalies and partial failures are summarized along with conclusions regarding their causes. The thermal, vacuum and radiation effects of the space environment are shown to be minimal and quite localized within the WEP.
Bendell, C. B.↗
The University of Wisconsin OAO operating system
The Wisconsin OAO operating system is presented which consists of two parts: a computer program called HARUSPEX, which makes possible reasonably efficient and convenient operation of the package and ground operations equipment which provides real-time status monitoring, commanding and a quick-look at the data.
Heacox, H. C.↗
A comparison of surface brightness measurements from OAO-2 and OSO-6
A comparison of surface brightness measurements of the night sky from the OAO-2 and OSO-6 satellites with ground observations shows good agreement between the space experiments but a systematic error in the zero point of the ground observations, indicating an additional atmospheric source of radiation.
Roach, F. E.↗
OAO-2 observations of C III 1909 A line in gamma 2 Velorum
The C III 1909 A emission line in gamma 2 Velorum was observed over a period of 24 hours in an attempt to find short period time variability. Analysis of this data found no periods in the range of 0.5 to 200 minutes, and placed an upper limit of 3% on the amplitude of the stellar pulsations. Improved spectral resolution data for this line was obtained by offsetting the OAO-2 pointing in steps of 15 seconds of arc. The line profile derived by combining this offset data with the slit function shows a definite asymmetry. Although the improved resolution gives results which are barely sufficient for comparison with the prediction from model envelopes, some information concerning the abundance of carbon and the physical conditions of the envelope can be gained.
West, D. K.↗