The Measurement of the Vertical Distribution of Ozone in the Terrestrial Atmosphere from a Satellite PDF Download
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Author: Richard T. Bettinger
Publisher:
ISBN:
Category :
Languages : en
Pages : 100
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Author: Richard T. Bettinger
Publisher:
ISBN:
Category :
Languages : en
Pages : 100
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Author: R. D. Rawcliffe
Publisher:
ISBN:
Category :
Languages : en
Pages : 12
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A satellite-borne radiometer has been used to determine the vertical distribution of ozone at high altitudes. The attenuation, due to the ozone, of solar ultraviolet radiation passing obliquely through the atmosphere was measured at times of sunrise and sunset(as seen by the orbit ing vehicle). The sensor employed a photomulti plier tube and filter combination plus a quartz light pipe that allowed a uniformly sensitive field of view of =10 deg in elevation and 350 deg in azimuth. A transition from full sunlight to signal extinction, or vice versa, occurred in a period of about 20 seconds, twice per orbit. The shape of this step has been analyzed with a 7090 computer program to deduce the vertical ozone distribution at altitudes above the maximum. The orbital parameters were such that sunset and sun rise occurred when the vehicle was near 33 de grees S and 13 degrees S latitudes, respectively. (Au.
Author: R. D. Bojkov
Publisher:
ISBN:
Category :
Languages : en
Pages : 20
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Author: James M. Russell
Publisher:
ISBN:
Category : Ozone
Languages : en
Pages : 60
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This report presents a description and detailed analysis of a technique for inferring atmospheric ozone information from satellite nadir measurements in the 1042 cm−1 band. A method is formulated for computing the emission from the lower boundary under the satellite which circumvents the difficult analytical problems caused by the presence of atmospheric clouds and the water-vapor continuum absorption. The inversion equations are expanded in terms of the eigenvectors and eigenvalues of a least-squares-solution matrix, and an analysis is performed to determine the information content of the radiance measurements. The results show that under favorable conditions there are only two pieces of independent information available from the measurements: the total ozone u and the altitude hm of the primary maximum in the ozone profile. An error analysis shows that errors in u are affected most by random radiance noise, lower boundary temperature errors, and ozone absorption-line intensity errors. Errors in hm are affected most by the former two errors and also by temperature-profile bias errors. The results when all errors are considered simultaneously indicate that it should ultimately be possible to determine u to within 10 percent or less and to determine hm to within 1.5 km when the root-mean-square radiance noise level is 1 percent or less. The calculations are also made for various degrees of cloudiness in the troposphere. The data show that the presence of clouds does not seriously affect results as long as there is some contrast between the ozone spectrum and the lower boundary emission spectrum. Finally, the inversion technique is applied to radiances measured from a balloon over Palestine, Texas, and to Nimbus III satellite data measured over the Bahama Islands.
Author: Gail P. Anderson
Publisher:
ISBN:
Category : Ozone layer
Languages : en
Pages : 114
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 48
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A satellite experiment to determine both the vertical distribution of ozone above 70 km and the radiance of the atmosphere at the center of the Hartley absorption band of ozone at 2550 Angstroms is described. Two flights of the experiment were made successfully, resulting in measurement of the vertical distribution between 60 and 85 km and of the radiance at the nadir for sun angles from 90 to about 49 degrees. The vertical distribution data agree with previous results below 70 km and with theory to 85 km. The radiance, which was not measured previously, is observed to have a maximum value of 2.0 times 10 to the 9th w/sq cm-sr-Angstroms for a solar zenith angle of 49 degrees.
Author: R. D. Rawcliffe
Publisher:
ISBN:
Category :
Languages : en
Pages : 38
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The radiance of the earth's daylit atmosphere at 2840 A has been measured with a satellite-borne radiometer as a function of latitude along the 2 o'clock meridian and as a function of angle of insolation. The data are compared with the expected radiances calculated using three different ozone distributions. Using the relation between radiance and ozone concentration, the data also are analyzed to give the latitude distribution of the high altitude (>35 km) ozone. This analysis shows that the seasonal variation of the high altitude ozone appears to be about 6 months out of phase with the well known seasonal variation near the peak of the ozone profile (maximum in late winter and minimum in late summer). The spectral distribution of the UV radiance calculated by a number of authors along with the present measurement and the data of other experimenters, are summarized and compared.
Author: Michaela I. Hegglin
Publisher:
ISBN: 9789966076021
Category :
Languages : en
Pages : 79
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Author:
Publisher:
ISBN:
Category : Astronautics
Languages : en
Pages : 584
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Author:
Publisher:
ISBN:
Category : Air
Languages : en
Pages : 4
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