Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999acasn..40..307h&link_type=abstract
Acta Astron. Sin., Vol. 40, No. 3, p. 307 - 311
Astronomy and Astrophysics
Astronomy
Balloons: Observations, Balloons: Control Systems
Scientific paper
The key to the object pointing and tracking on the basis of programmed control lies in the coordinate transformation from the equatorial system to the horizontal one. In this process one needs to know three quantities, i.e. geographic longitude, geographic latitude and time, which are variables when an astronomical observation is made during a balloon flight. However, they can be provided by a GPS receiver in real time. The authors have designed and made such a pointing and tracking system and tested it during a balloon flight for X-ray observation in the night of May 16, 1998. From the results it is demonstrated that the method is feasible and reliable in the balloon flight condition. It is useful for balloon astronomical observations and especially for balloon-borne X-ray observations in long duration flights.
Gong Yizhong
Hang Hengrong
Li Xiaoqing
Liu Shanzhao
Wang Nansen
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