Recent radio observations of the planet Venus
Radio spectral data of Venus - water vapor line graphs
WATER VAPOR↗
SEARCH · Engineering Papers
Results for “spectral data”
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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Preliminary results from the Ogo 1 search coil magnetometer - Boundary positions and magnetic noise spectra.
Magnetopause location, boundary positions and magnetic noise spectral data obtained with triaxial search coil magnetometer aboard Ogo I satellite
MAGNETOMETER↗
Excitation rates in the auroral nitrogen second positive group.
Auroral excitation rates and molecular vibrational tempratures in nitrogen 2PG from Franck-Condon factors obtained from intensity measurements and high resolution absorption spectral data
ELECTRON TRANSITION↗
Neutron and proton spectra from targets bombarded by 160-Mev protons.
Secondary neutron spectral data measured by proton recoil spectrometer from targets bombarded by 160 Mev protons
NEUTRON SPECTRUM↗
Spectra of the central stars of planetary nebulae.
Spectral data for central stars of planetary nebulae from Lick 120-inch telescope, discussing stellar temperature and evolutionary track deduction
Aller, L. H.↗
Magnetic field fluctuations in the earth's magnetosheath
Magnetic field fluctuations in magnetosheath of Explorer 34 spectral data on sunward earth hemisphere
Fairfield, D. H.↗
Computerized spectrum analysis
Automatic spectral data reduction and analysis system consisting of densitometer, analog-digital converter and IBM 1800 process computer with magnetic disk memory
Kylstra, C. D.↗
Photoelectric energy spectrometer Patent
Spectrometer using photoelectric effect to obtain spectral data
Becker, R. A.↗
Three bit mass spectral search program
Computer program is developed to interpret spectral data in order to assist chemist in identifying low resolution mass spectra. Two versions of program, using approximately same amount of core are available. In both programs, core requirements are roughly proportional to maximum number of unknowns to be handled on each pass through tape.
Grotch, S. L.↗
Advanced study of global oceanographic requirements for EOS A/B: Appendix volume
Tables and graphs are presented for a review of oceanographic studies using satellite-borne instruments. The topics considered include sensor requirements, error analysis for wind determination from glitter pattern measurements, coverage frequency plots, ground station rise and set times, a technique for reduction and analysis of ocean spectral data, rationale for the selection of a 2 PM descending orbit, and a priority analysis.
Source record↗
Vaporization characteristics of carbon heat shields under radiative heating.
Study of the vaporization characteristics of samples of ATJ graphite, a material that has been considered for use on a Jovian probe. These samples were subjected to radiative heating loads of approximately 2 kW/sq cm in argon atmospheres of pressures from 0.00046 to 1 atm. Surface temperatures, mass loss rates, and spatially resolved emission spectral data were recorded. These data are analyzed to determine carbon vapor pressure as a function of temperature and are compared with current models for the vapor pressure of carbon. The effects of finite vaporization (i.e., nonequilibrium) rates are considered and compared with experiment. Estimates of the heat of vaporization from an energy balance are also presented.
Davy, W. C.↗
Digital methods of photopeak integration in activation analysis.
A study of the precision attainable by several methods of gamma-ray photopeak integration has been carried out. The 'total peak area' method, the methods proposed by Covell, Sterlinski, and Quittner, and some modifications of these methods have been considered. A modification by Wasson of the total peak area method is considered to be the most advantageous due to its simplicity and the relatively high precision obtainable with this technique. A computer routine for the analysis of spectral data from nondestructive activation analysis experiments employing a Ge(Li) detector-spectrometer system is described.
Baedecker, P. A.↗
Pollution detection in Lake Champlain using ERTS-1 imagery
The author has identified the following significant results. A major waste water discharge plume generated by a large paper mill along the New York shore of Lake Champlain was visually detected on ERTS-1 imagery. The plume is best displayed in 9.5 inch positive transparencies of MSS bands 4 and 5. Observation of the magnitude and extent of this plume is feasible, under magnification of 4 times. The chemical parameters of this plume have been documented by limnological studies. An enhancement technique useful for documenting the presence of waste water discharge plumes in Lake Champlain utilizes Polaroid MP-3 copy camera equipment and Spectral Data Corporation's multispectral viewer. The 9.5 inch, ERTS-1, positive transparency is enlarged using the Polaroid MP-3 copy camera to produce an enlarged lantern slide size positive transparency. These are projected through the multispectral viewer for enhancement and the scene is viewed directly on the screen or copied by an additional photographic step. The technique is simple and produces rapid results.
Lind, A. O.↗
Analysis of chemical components from plant tissue samples
Information is given on the type and concentration of sterols, free fatty acids, and total fatty acids in plant tissue samples. All samples were analyzed by gas chromatography and then by gas chromatography-mass spectrometry combination. In each case the mass spectral data was accumulated as a computer printout and plot. Typical gas chromatograms are included as well as tables describing test results.
Laseter, J. L.↗
Study of dual-channel infrared spectroradiometer systems
A dual channel infrared spectroradiometer system was installed at a high altitude facility where spectral data were obtained from F2/H2, FLOX/CH4, FLOX/B2H6, OF2/CH4, and OF2/B2H6 propellant combinations. A good HF emission spectra was obtained for tests with the OF2B2H6 propellant combination. Subsequently, data were obtained on the LOX/GH2 propellant combination at sea level and altitude conditions that were inconsistent because the calculation of plume properties led to physically unrealistic results. The inconsistencies resulted from measurement accuracy not being within the narrow limits required by the data reduction scheme. Although the anticipated program results were not obtained, the data gathered are useful for guiding future experimental efforts and formulations of less sensitive analytical models.
Wrubel, J. A.↗
A study of marine luminescence signatures, part 1
Fluorescent excitation and emission spectral data on chlorophyll and Gelbstoff in natural sea waters from the Atlantic, Gulf, and Pacific coasts show that algae particulates are totally absorbing over much of the near ultraviolet and visible spectra and act approximately as quantum counters; plant pigments absorb energy and transfer a large portion to chlorophyll where some fraction is emitted as chlorophyll fluorescence. Gelbstoff data do not exhibit quantum counter action because of their low concentration. It is concluded that luminescence data of natural sea waters are useful in monitoring algal and Gelbstoff as well as pollutant concentrations.
Hornig, A. W.↗
Evaluation and comparison of ERTS measurements of major crops and soil associations for selected sites in the central United States
The author has identified the following significant results. An unsupervised classification was run for an area around Tahoka Lake, Texas. Classes from the unsupervised were correlated with the available ground observations. Unsupervised classes which corresponded to major rangeland composition groups were used as a basis for a classification of most of Lynn County. Three classes of pasture were identified: (1) clear pasture, mostly grasses; (2) mixture of grasses and mesquite; and (3) areas of thick mesquite. In addition, one class called other included lakes and agricultural areas. It was found that differences in rangeland composition could be mapped from spectral data using computer-aided processing techniques. The T Bar Ranch, which surrounds the Double Lakes west of Tahoka, Texas, was chosen as a test area for the classification of rangeland. It was found that the classification was reasonably consistant with the low altitude oblique air photos.
Baumgardner, M. F.↗
High altitude remote spectroscopy of the ocean.
An airborne spectrometer for measuring the spectral radiance characteristics of large bodies of water is described, and measured spectral signatures are analyzed to demonstrate the effects of sensor altitude. The contribution of backscattered light from the atmosphere becomes large at higher altitudes, particularly at the shorter wavelengths of the visible range. This reduces the contrast of the imaged scene and results in a substantial modification of the signal received by the spectrometer. The atmospheric effect on spectral data is described in some detail, and a technique is outlined for extracting pertinent information from high-altitude data.
White, P. G.↗