The results of a complex research of functioning the GSS "SBIRS-Geo 2" in orbit

1Sukhov, PP, 2Epishev, VP, 1Sukhov, KP, 1Karpenko, GF, 2Motrunich, II
1Astronomical Observatory of I.I. Mechnikov National University of Odessa, Odessa
2Space Research Laboratory of the Uzhgorod National University, Uzhgorod
Kosm. nauka tehnol. 2017, 23 ;(1):63-70
https://doi.org/10.15407/knit2017.01.063
Section: Space Navigation and Communications
Publication Language: Russian
Abstract: 
The new generation of geosynchronous satellites SBIRS of US Air Force early warning system series (Satellite Early Warning System) replaced the previous DSP-satellite series (Defense Support Program). Currently from the territory of Ukraine, several GSS of DSP series and one SBIRS-Geo 2 are available to observation. During two years of observations, we have obtained and analyzed more than 30 light curves in B, V, R photometric system for two satellites. As for  a result of complex research, we propose a model of SBIRS-Geo 2 orbital behavior compared with the same one of the DSP-satellite.To control the entire surface of the Earth with 15-16 sec interval, including the polar regions, 4 SBIRS satellites located every 900 along the equator are enough in GEO orbit. Since DSP-satellites provide the coverage of the Earth’s surface to ±830 latitudes with a period of 50 sec, DSP-satellites should be 8. All the conclusions were made based on an analysis of photometric and coordinate observations using the simulation of the dynamics of their orbital behavior.
Keywords: geostationary satellite; photometry; light curve; SBIRS-Geo 2; DSP; phase angle
References: 
1. Epishev V. P. Opredeleniye oriyentatsii INT v prostranstve po ikh zerkal'nomu otrazheniyu. Astrometriya i astrofizika AN USSR, N 50, 89—93 (1983).
2. Kornilov V. G., Volkov I. M. i dr. Katalog WBVR-velichin yarkikh zvezd severnogo neba. Trudy GAISH, 63, 400 p. (1991).
3. Severnyy S. A., Smirnov M. A., Bagrov A. V. Opredeleniye formy iskusstvennogo sputnika Zemli po fotometricheskim nablyudeniyam. Nauchnyye informatsii, N 58, 103—106 (1986).
4. Sukhov P. P., Chaychuk R. A. Svetodiodnyy etalon yarkosti.Novaya tekhnika v astronomii, 20—23 (1984).