Preliminary radar results of Mars
Mars radar results during 1969 opposition, presenting elevation and radar brightness as function of longitude
Downs, G. S.↗
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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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Jupiter's Red Spot in 1968-1969
Jupiter Red Spot 1968-1969 photographic observations, discussing area darkness, longitude oscillation and acceleration
Reese, E. J.↗
The UTRAO periodogram survey - Preliminary report for periods greater than 9h 06m 08s
Investigation of periodic nature of Jupiter bursts to determine correlation with position of satellite IO and central meridian of longitude of Jupiter
Bozyan, F. A.↗
On the construction and use of a simple ionospheric model
Ionospheric computer model, describing electron and ion densities in middle latitudes as function of latitude, longitude, altitude, season, time and solar activity
Nisbet, J. S.↗
The decay phase of solar flare events
Solar flare radiation data from Pioneer spacecraft, detailing anisotropy, heliocentric longitude gradients, decay time constants and energy spectra
Bukata, R. P.↗
Jupiter - Its Red Spot and other features in 1969-1970
Jupiter Red Spot and other photographic features in 1969-1970, noting 90-day oscillation in longitude and south tropical zone disturbance
Reese, E. J.↗
Colin Gum and the discovery of the Gum nebula
The research of Colin Gum in the field of astronomy is reviewed. It includes a radio survey at 200 MHz, a photographic survey for HII regions in the Southern Milky Way from longitude 220 deg to 20 deg, and a catalogue of 85 physically separate regions. He suggested that certain faint nebulosities were part of a large, nearby H II region excited by gamma Velorum and zeta Puppis. He was also concerned with 21-cm studies.
Kerr, F. J.↗
A high sensitivity search for X-rays from supernova remnants in Aquila
A high sensitivity scan of the galactic plane was performed to search for 2-20 keV X-rays from supernova remnants. The spectra of five X-ray sources detected between 44 deg and 31 deg longitude, of which only two might be associated with suggested supernova remnants, are reported on. Upper limits are presented for the 19 possible supernova remnants scanned in this survey.
Schwartz, D. A.↗
X-ray emission from the galactic disk
A search was made of a diffuse component of X-rays 1.5 keV associated with an interarm region of the galaxy at galactic longitudes in the vicinity of 60 deg. A statistically significant excess associated with a narrow disk component was detected. The angular extent of this component has a most probable value of 2 deg and may be as large as 7 deg at 90% confidence. The best fit spectrum yields an intensity of 2.9 photons 1/(cm2-sec-ster) over the 2 to 10 keV range. The 3 sigma upper limit to any emission (e.g. iron line) in a 1.5 keV band centered at 7 keV from galactic latitudes h or = 3.5 deg is .3 photons 1/(cm2-sec-ster). Several possible emission models are discussed, with the most likely candidate being a population of unresolvable low luminosity discrete sources.
Bleach, R. D.↗
The particles and fields subsatellite magnetometer experiment
A preliminary analysis of magnetometer data from Apollo 15 subsatellite is concluded. Remanent magnetization is a characteristic property of the moon, and the distribution is such that a complex pattern is produced. A mapping of the distribution is feasible with the present experiment. Lunar induction fields produced by transients in interplanetary magnetic field are detectable at satellite orbit. Magnetometer data will provide estimates of the latitude and longitude dependences of interior conductivity. The plasma void extends to some altitude below the satellite orbit and probably the lunar surface. Solar wind near the limbs is usually strongly disturbed.
Coleman, P. J., Jr.↗
A study of 2-20 KeV X-rays from the Cygnus region
Two rocket-borne proportional counters, each with 650 sq c, met area and 1.8 x 7.1 deg FWHM rectangular mechanical collimation, surveyed the Cygnus region in the 2 to 20 keV energy range on two occasions. X-ray spectral data gathered on 21 September 1970 from discrete sources in Cygnus are presented. The data from Cyg X-1, Cyg X-2, and Cyg X-3 have sufficient statistical significance to indicate mutually exclusive spectral forms for the three. Upper limits are presented for X-ray intensities above 2 keV for Cyg X-4 and Cyg X-5 (Cygnus loop). A search was made on 9 August 1971 for a diffuse component of X-rays 1.5 keV associated with an interarm region of the galaxy at galactic longitudes in the vicinity of 60 degrees. A statistically significant excess associated with a narrow disk component was detected. Several possible emission models are discussed, with the most likely candidate being a population of unresolvable low luminosity discrete sources.
Bleach, R. D.↗
An atlas of low latitude 6300A (01) night airglow from OGO-4 observations
The atomic oxygen emission line at 6300 A, measured in the nadir direction by a photometer on the polar orbiting satellite OGO-4, was plotted between 40 deg N and 40 deg S latitude on a series of maps for the moon-free periods between 30 August 1967 and 10 January 1968 The longitudinal and local time variations which occur during the northern fall-winter season are indicated. The northern tropical arc is more widespread while the southern arc is not present at all longitudes. The conditions under which the observations were made are described, and four airglow maps were selected to show the local time variations.
Reed, E. I.↗
World maps of predicted electron intensities for the ITOS-A/NOAA-1 spacecraft
Maps of electron fluxes 10,000, 1 million, and 10 million particles/sq cm/sec are presented for an ITOS-A/NOAA-1 circular orbit, inclination of 79 deg, and altitude of 1463 km. The uncertainty in the flux values is about a factor of 3, and the error in contour plotting may be plus or minus 2 deg in latitude and plus or minus 3 deg in longitude. The fractional lifetime spent within the different intensity regions is graphed.
Stassinopoulos, E. G.↗
Atlas of electron content values observed at Urbana, Illinois, 1 December 1967 - 30 December 1970
Ionospheric electron content versus local time data deduced from Faraday rotation observations of ATS-III geostationary satellite signals at Urbana, Illinois are reported. The data are presented in two forms. Values of subionospheric latitude (SILAT) and subionospheric longitude (SILON) are in degrees north and degrees west, respectively. These are computed on the basis of 350 km for the mean ionospheric height, which value is also used for the calculation of the geometric-magnetic factor, required for the conversion of the measured Faraday rotation angle to electron content. Entries of zero for the electron content in the tables represent no data for those times.
Flaherty, B. J.↗
Why does the sun sometimes look like a magnetic monopole?
For several months in early 1965 the sun appeared to have large scale magnetic field directed outwards at nearly all latitudes and longitudes. Several independent observations that lead to this puzzling situation are discussed.
Wilcox, J. M.↗
Ultraviolet photometry of the moon with the celescope experiment on the OAO-2
Thirteen television frames of the moon taken in the wavelength regions of 1350-2150 A by filter U sub 3 and 1050-2150 A by filter U sub 4 in the celescope experiment are discussed. The data include phase angles from -81 deg to -26 deg. The brightness dependence on phase angle differs slightly from that of visual observations. The brightness dependence on selenographical longitude is compared with the theoretical photometric function derived by Hapke.
Ahmad, I. A.↗
Variations of atmospheric density near 400 km with magnetic activity during the storm period of 28 September to 2 October 1969
Neutral density data were obtained near 400 km (1600 LT) from a microphone density gage on OGO-6 from 0 to 40 deg N geomagnetic latitude for 25 September through 3 October 1969. Several geomagnetic storms occurred during this period. Least squares fits were made to data points on density scatter diagrams. An equation representing the least squares fit was computed for each delay time. The equation of best fit (and the corresponding time delay between the density and the magnetic index which resulted in this best fit) was found by choosing the equation that gave the minimum standard error. The implications of the time differences associated with the best fits at various latitudes and longitudes are discussed with regard to the time delays involved in geomagnetic heating of the neutral upper atmosphere.
Anderson, A. D.↗
The application of color display techniques for the analysis of Nimbus infrared radiation data
A color enhancement system designed for the Applications Technology Satellite (ATS) spin scan experiment has been adapted for the analysis of Nimbus infrared radiation measurements. For a given scene recorded on magnetic tape by the Nimbus scanning radiometers, a virtually unlimited number of color images can be produced at the ATS Operations Control Center from a color selector paper tape input. Linear image interpolation has produced radiation analyses in which each brightness-color interval has a smooth boundary without any mosaic effects. An annotated latitude-longitude gridding program makes it possible to precisely locate geophysical parameters, which permits accurate interpretation of pertinent meteorological, geological, hydrological, and oceanographic features.
Allison, L. J.↗