Photometrical Observations "SBIRS GEO-2"
Abstract
Photometrical observations GSS "SBIRS GEO 2" in B,V,R filters were carried near the equinoxes 2014-2015. Used velocity electrophotometer based on the FEU-79 in the pulse-counting mode. Received more than 25 light curves. From the known dimensions are defined; effective reflecting area - Sγλ, the spectral reflectance index - γλ, periods of light variation. Color-indices showed that in the reflected light flux from the GSS prevails "red" component. In the light curves are periodically dips and specular flash. This shows that GSS orbit is not in a static position specified triaxial orientation as in dynamic motion. Assumed following dynamics of the satellite "SBIRS GEO 2" in orbit. Helical scanning the Earth's surface visible infrared sensors satellite occurs with a period P1 = 15.66 sec. and swinging of the GSS about the direction of the motion vector of the satellite in an orbit with P2 = 62.64 sec., from the northern to the southern pole. Thus, during the period of swinging GSS going on 2 scan the visible part of the northern and southern hemispheres. In some dates observations dynamics work satellite in orbit changed.
- Publication:
-
Near-Earth Astronomy 2015. Proceedings of the International conference 31 Aug. - 5 Sept. 2015. Terskol
- Pub Date:
- August 2015
- Bibcode:
- 2015nea..conf..281S
- Keywords:
-
- multicolour photometry;
- light curves;
- specular flash;
- satellite identification;
- effective reflecting area;
- color-indices;
- SBIRS GEO-2;
- geostationary satellite;
- GSS