Improvement of star identification based on star trace in star images
| Autor: | Zhili Zhang, Dianjian Liu, Xianyi Liu, Zhaofa Zhou, Xihui Zhang |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Physics
Intergalactic star Star formation Applied Mathematics X-ray binary Astrophysics::Cosmology and Extragalactic Astrophysics 02 engineering and technology Astrophysics Star count Herbig Ae/Be star 010502 geochemistry & geophysics Condensed Matter Physics 01 natural sciences Star catalogue 020210 optoelectronics & photonics Binary star 0202 electrical engineering electronic engineering information engineering Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics Electrical and Electronic Engineering Instrumentation Astrophysics::Galaxy Astrophysics 0105 earth and related environmental sciences X-ray pulsar |
| Zdroj: | Measurement. 105:158-163 |
| ISSN: | 0263-2241 |
| DOI: | 10.1016/j.measurement.2017.04.006 |
| Popis: | Digital zenith camera system is a highly accurate positioning instrument in geodetic astronomy. It can capture 16 star images in one experiment unit in different azimuthal camera orientations and the stars in each star image should be identified using star catalogue. But the amount of calculation is very large, the efficiency of star identification is low. Now, the improvement of star identification is mainly through updating algorithm. Considering that there exist identical stars in these star images, this paper provides a new method to improve star identification. The star trace is deduced taking the earth rotation and instrument rotation into consideration. The errors of star trace are also analyzed. Then select the same stars that appear in the star images taken in the initial position and after rotating one angle. Using the identical stars instead of star catalogue and the star trace to identify the rest stars, the efficiency will get improved. The analysis of experimental data shows that there are many identical stars in these star images. The appearance of one star can be predicted according to the star trace. The star identification get improved by using the same stars in these star images. And it costs less time to identify the stars in star images, but the precision is approximately equal. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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