Open AccessComparisons of recent data of density scale height at 544-877 km with CIRA model
Author(s) -
Yaying Liu
Publication year - 1996
Publication title -
annales geophysicae
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.522
H-Index - 93
eISSN - 1432-0576
pISSN - 0992-7689
DOI - 10.1007/s00585-996-0222-4
Subject(s) - scale height , altitude (triangle) , scale (ratio) , satellite , atmospheric sciences , environmental science , elevation (ballistics) , geodesy , orbit (dynamics) , meteorology , mathematics , physics , geology , geometry , astronomy , quantum mechanics , aerospace engineering , engineering
In order to obtain the observed scale height\udat high altitude a calculation method has been derived for determining density\udscale height from the difference between two satellite's heights. Two balloon\udsatellites, Chinese DQ-1A and DQ-1B, were launched together into a nearly\udcircular orbit at a height near 900 km and they were together in orbit for 190\uddays. According to the difference of the orbital heights of these two balloon\udsatellites from 19 September 1990 to 9 March 1991, 67 values of density scale\udheight at heights of about 544–877 km were determined. In comparison with CIRA\udmodel the results show that: (1) the trend of the variation of the scale height\udwith height is in agreement with CIRA; (2) the determined scale height values\udpresent an oscillatory variation with time and height; and (3) the mean of the\udobserved scale height is 3.7% lower than the mean of corresponding values from\udCIRA-72 and 0.8% lower than CIRA-86