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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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The continued analysis of data obtained from the neutral atmospheric composition experiment flown on OGO-V6 is discussed. The effort was directed toward the study of five specific areas of interest for which the OGO-V6 data were especially useful.
The results obtained with the retarding potential analyzer on the OGO-6 satellite are discussed. The information obtained during the OGO-6 flight concerned the following subjects: (1) measurement of electron flux density in the plasmasphere, (2) latitudinal variations of ion temperature, (3) heating in the nighttime ionosphere by conjugate photoelectrons, (4) longitudinal variation in equatorial ion temperature at low altitude, and (5) identification of heavy ions in the upper F region.
The kinetic energy flux of the upper atmosphere was analyzed using OGO-6 data. Energy transfer between 10 microwatts/sq cm and 0.1 W/sq cm was measured by short-term frequency changes of temperature-sensitive quartz crystals used in the energy transfer probe. The condition of the surfaces was continuously monitored by a quartz crystal microbalance to determine the effect surface contamination had on energy accommodation. Results are given on the computer analysis and laboratory tests performed to optimize the operation of the energy transfer probe. Data are also given on the bombardment of OGO-6 surfaces by high energy particles. The thermoelectrically-cooled quartz crystal microbalance is described in terms of its development and applications.
An overview of the OGO program is presented. Brief descriptions of the six OGO spacecraft, and the experiments on each are included.
The thermospheric temperatures measured by the Fabry-Perod interferometer on the OGO 6 satellite are found to be reasonably represented by the mass spectrometer/incoherent scatter 1986 (MSIS-86) empirical model except for two anomalies, one in the South Atlantic and the other near noon local time. These anomalies are likely due to measurement problems. The OGO 6 temperature data were not used in the generation the MSIS models, so this is an independent comparison of measured and model temperatures. The measurements were made primarily during daytime at mid to low latitudes and throughout the day at high latitudes. On average, the measured temperatures are 16 K below the MSIS-86 model temperatures. Latitude gradients during solstices as well as for the yearly average are well represented by the model, as are high-latitude longitudinal and magnetic activity variations.
Geo-coronal hydrogen measurement experiment on OGO-E - methods of obtaining orbital and spacecraft parameters for data analysis
IMP-II and OGO-I measurements on plasma characteristics in transition region between solar wind and geomagnetic field
Thermal hydrogen and helium ion distribution in magnetoionosphere - OGO-A positive ion spectrometer
Single axis space simulator for OGO attitude control system tests
Ogo-A first results on mass spectrometry measurements of thermal positive ion composition at high altitudes
Magnetopause location, boundary positions and magnetic noise spectral data obtained with triaxial search coil magnetometer aboard Ogo I satellite
Airglow lines measured through photometers on OGO-II satellite, noting nadir and zenith airglow
Low energy electrons in earth magnetosphere observed by OGO III
OGO-C observations of low-energy protons and electrons in earth magnetosphere
Telemetry data processing plan for OGO-A MISSION - pulse code modulation digital and analog data techniques - ground data acquisition system
Abstracts and experiment descriptions of OGO I, II, III, E, and F - Bibliography
Root-mean-square differences between measured magnetic field values obtained by rubidium vapor magnetometer aboard OGO-2 satellite and values derived from spherical harmonic expansions