Перегляд за Автор "Kara, I. V."

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  • Ескіз
    Документ
    DETERMINATION OF THE EPHEMERIS ACCURACY FOR AJISAI, LAGEOS AND ETALON SATELLITES, OBTAINED WITH A SIMPLIFIED NUMERICAL MOTION MODEL USING THE ILRS COORDINATES
    (Astroprint, 2013) Kara, I. V.
    ABSTRACT. This paper describes a simplified numerical model of passive artificial Earth satellite (AES) motion. The model accuracy is determined using the International Laser Ranging Service (ILRS) highprecision coordinates. Those data are freely available on http://ilrs.gsfc.nasa.gov. The differential equations of the AES motion are solved by the Everhart numerical method of 17th and 19th orders with the integration step automatic correction. The comparison between the AES coordinates computed with the motion model and the ILRS coordinates enabled to determine the accuracy of the ephemerides obtained. As a result, the discrepancy of the computed Etalon-1 ephemerides from the ILRS data is about 10” for a one-year ephemeris.
  • Ескіз
    Документ
    MONITORING THE ACCURACY OF OBSERVATIONS OF PASSIVE OBJECTS ON THE BASIS OF THE INTERNATIONAL LASER RANGING SERVICE (ILRS) DATA
    (Astroprint, 2010) Kara, I. V.
    Today, the problem of pollution of the near-Earth space environment is becoming more acute. In view of that, a larger number of stations for observation and tracking of artificial earth satellites (AES) and space debris objects have been set up. The accuracy of the ephemerides of such objects depends on the quality of the observations obtained. Therefore, the possibility of efficient quality control and monitoring the accuracy of the gathered observations is extremely essential. The suggested method allows of promptly conducting a check on the correctness of the data obtained. The coordinate data of the International Laser Ranging Service (ILRS) are assumed as a basis of the method mentioned above. The developed mathematical software (MS) enables observers to analyze their observations efficiently and without assistance in order to reveal and solve arisen instrumental problems opportunely.