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A Proposed International Tropical Reference Atmosphere up to 1000 km

Ananthasayanam, MR and Narasimha, R (1987) A Proposed International Tropical Reference Atmosphere up to 1000 km. In: Advances in Space Research, 7 (10). pp. 117-131.

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Motivated by the need in many aerospace applications for a meaningful reference atmosphere characteristic of the whole of the tropics in both the northern and southern hemispheres of the globe, a proposal was made earlier by the authors for altitudes up to 80 km. This proposal is here based on balloonsonde, rocketsonde, grenade, falling sphere and satellite data in the range 0 to 100 km, and on the MSIS- 83 model from 100 to 1000 km. The proposal consists of linear segments in the temperature distribution with values in degrees Celsius of 27, −9, −74, −5,−5, −74 and −80.4 at geopotential altitudes of 0, 6, 16, 46, 51, 74 and 84.69 km (= 86 km geometric altitude) respectively, beyond which the description is in terms of geometric altitude. A linear segment between 86 and 97 km with a lapse rate of $0.6^0C/km$ is followed by an elliptic variation commencing with atemperature gradient of zero at 97 km to reach at 110 km a temperature of $−45^0C$ with a gradient of $15^0C/km$. This gradient remains constant up to 120 km where the temperature is $105^0C$. Beyond 120 km the temperature distribution follows a Bates type of profile up to 1000 km to reach a value there of $760^0C$. A sea level pressure of 1010 mb and an acceleration due to gravity of $9.78852 ms^{-2}$ corresponding to the Tropic of Cancer are used in the preparation of the atmospheric tables.

Item Type: Journal Article
Publication: Advances in Space Research
Publisher: Elsevier Science
Additional Information: Copyright of this article belongs to Elsevier Science.
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited: 09 Apr 2008
Last Modified: 19 Sep 2010 04:44
URI: http://eprints.iisc.ac.in/id/eprint/13718

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