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  • 1
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    Infrared spectroscopic measurements of halogenated sink and reservoir gases in the stratosphere with the ATMOS instrument (1987)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: The Atmospheric Trace Molecule Spectroscopy (ATMOS) instrument recorded 19 sets of interferograms during solar occultations in both the Northern and Southern Hemispheres over the course of the Spacelab 3 mission. The resulting IR spectra furnish concentration profiles for over 25 atmospheric species. Attention is presently given to the volume mixing ratio profiles for HCl and HF in the 15-60-km altitude region, retrieved from northern sunsets and southern sunrises. The HF/HCl ratios deduced are in good agreement with model predictions. The total atmospheric chlorine at 50 km is nearly all in the form of HCl.
    Keywords: GEOPHYSICS
    Type: Journal of Geophysical Research (ISSN 0148-0227); 92; 9851-985
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  • 2
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    Detection of carbonyl fluoride in the stratosphere (1986)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: Infrared solar absorption spectra of the stratosphere recorded at a resolution of 0.01/cm by the ATMOS (Atmospheric Trace Molecule Spectroscopy) instrument from onboard Spacelab 3 (04/30 to 05/6/85) have revealed the existence of many previously unobserved absorption features in the 1925 to 1960/cm and 1249 to 1255/cm regions and one at 774/cm. On the basis of comparisons with laboratory spectra, these features have been identified as belonging to the nu1, nu4, and nu6 bands of carbonyl fluoride, respectively. Volume mixing ratios of COF2 between 17 and 40 km have been deduced from analysis of the nu1 and nu6 bands.
    Keywords: GEOPHYSICS
    Type: Geophysical Research Letters (ISSN 0094-8276); 13; 769-772
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  • 3
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    Spectroscopic detection of Ch3Cl in the upper troposphere and lower stratosphere (1986)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Description: Absorptions due to the nu1 band of CH3Cl have been identified for the first time in infrared solar absorption spectra of the upper troposphere and lower stratosphere. The spectral data were obtained with the ATMOS Fourier transform spectrometer on board Spacelab 3 in May 1985 during four solar occultation events near latitudes of 30 deg N, 26 deg N, 25 deg N, and 49 deg S. Volume mixing ratio profiles of CH3Cl retrieved for the altitude range 12 to 23 km at these four latitudes do not show appreciable differences. Vertical mixing ratio distributions vary from 6 x 10 to the -10th at 12 km to 3 x 10 to the -10th at 23 km with an average uncertainty of about 25 percent. The retrieved mixing ratio does not decrease with altitude as rapidly as the data obtained by in situ techniques.
    Keywords: GEOPHYSICS
    Type: Geophysical Research Letters (ISSN 0094-8276); 13; 765-768
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  • 4
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    Spectroscopic detection and vertical distribution of HCl in the troposphere and stratosphere (1976)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: HCl has been observed in both the troposphere and stratosphere from ground-based and airborne spectroscopic measurements of the 1-0 band at 3-micron wavelength. The results, which are specific to the HCl molecule in the gas phase, show a decreasing mixing ratio with altitude in the lower stratosphere. The stratospheric layer, which commences at about 15 km, reaches its maximum concentration at an altitude above 21 km (the limiting height of the observations to date). The local value for the volume mixing ratio at 21 km is 7 + or - 1 times 10 to the minus 10th. However, the zenith column abundance observed above 21 km implies that the mixing ratios at greater altitudes are unlikely to reach values much in excess of the local value at 21 km.
    Keywords: GEOPHYSICS
    Type: Geophysical Research Letters; 3; Jan. 197
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  • 5
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    Measurement of the abundance of several natural stratospheric trace constituents from high altitude aircraft (1973)
    In:  Other Sources
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    Publication Date: 2019-07-13
    Description: A summary report of the initial results obtained from near-infrared observations of the stratosphere from the Anglo-French SST Concorde is presented, together with the most recent results from previous flights aboard an Air Force NC-135. The measurements were made with a fast Fourier interferometer spectrometer operating in the 1.2- to 7.5-micron range of the infrared with a spectral resolution of 0.25 per cm. For the Concorde experiments, flight times and trajectories were selected which allowed the sun to be viewed near the horizon with the relative solar elevation angle held constant throughout the measurements. Results reported include the identification of features due to N2O, NO, NO2, CO, CO2, CH4, H2O and indications of their latitudinal variations.
    Keywords: GEOPHYSICS
    Type: Joint Conference on Sensing of Environmental Pollutants; Dec 10, 1973 - Dec 12, 1973; Washington, DC
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  • 6
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    Geodynamics experiment MA-128 (1976)
    In:  CASI
    Details
    Publication Date: 2006-01-12
    Description: The Apollo Soyuz Test Project Geodynamics Experiment was performed to assess the feasibility of tracking and recovering high frequency components of the earth gravity field by utilizing a synchronous orbiting tracking station such as Applications Technology Satellite 6. Two prime areas of data collection were selected for this experiment. The first area is the center of the African continent, and the second area is the Indian Ocean depression centered at latitude 5 N and longitude 75 E. Preliminary results show that the detectability objective of the experiment has been achieved in both areas as well as in several additional anomalous areas around the globe. Gravity anomalies of the Karakoram and Himalayan mountain ranges of ocean trenches, and of the Diamantina depth are specific examples.
    Keywords: GEOPHYSICS
    Type: Apollo-Soyuz Test Project; 16 p
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  • 7
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    Earth physics, overview (1973)
    In:  CASI
    Details
    Publication Date: 2006-03-26
    Description: Satellite applications in earth and ocean dynamic studies are considered for: earthquake hazard assessment and alleviation; prediction of general ocean circulation, surface currents, and heat transport; monitoring of transient phenomena of the ocean surface, such as sea state and wave conditions, wind-surface interactions and storm searches; and refinement of the global geoid, the gravity and magnetic fields of the earth.
    Keywords: GEOPHYSICS
    Type: Significant Accomplishments in Sci.; p 211
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  • 8
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    First data from the earth radiation budget experiment (ERBE) (1986)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Description: The first data obtained from the Earth Radiation Budget Experiment (ERBE) are presented. These data include emitted infrared radiation, albedo, and estimated scene types for Nov. 15, 1984, as well as measurements of the 'solar constant'. Images from the GOES on the same day are included for comparison with the ERBE scene identification. On an instantaneous basis, clouds appear colder and more reflective than seems to have been noted before. The experiment data will be applied to several key studies of cloud-radiation-climate interactions.
    Keywords: GEOPHYSICS
    Type: American Meteorological Society, Bulletin (ISSN 0003-0007); 67; 818-824
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  • 9
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    The N.A.S.A. earth and ocean dynamics programme (1977)
    In:  Other Sources
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    Publication Date: 2011-08-17
    Description: Practical applications of NASA space systems, science, and technology to the study of oceans and solid earth are discussed. Goals involving earth dynamics include earthquake hazard assessment and alleviation, and global surveying and mapping, while goals involving ocean dynamics include the determination of ocean currents and circulation, and the monitoring of ocean surface conditions. Satellites used to obtain data are described, and projects such as the study of open ocean tides and earth motion determination are reviewed, with consideration given to the techniques (e.g., laser ranging, satellite-to-satellite track) used in these studies. Several physical phenomena, the extent to which they presently can be measured, and possible future requirements for more accurate measurements are examined.
    Keywords: GEOPHYSICS
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  • 10
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    Probing the earth's gravity field by means of satellite-to-satellite tracking (1977)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: Two satellite-to-satellite tracking (sst) tests are described in detail: (1) the ATS-6/Geos-3 and (2) the ATS-6/Apollo-Soyuz experiment. The main purpose of these two experiments was to track via ATS-6 the Geos-3, as well as the Apollo-Soyuz and to use these tracking data to determine both of the orbits at the same time, each of the orbits alone, and to test the two sst links to study local gravity anomalies. A second purpose was to test communications, command and data transmission from the ground via ATS-6 to these spacecraft and back again to the ground.
    Keywords: GEOPHYSICS
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