SIMULTANEOUS MULTI-SITE PHOTOMETRY OF LEO SATELLITES TO CHARACTERISE THEIR ROTATION STATES

Автор(и)

  • N. Koshkin Astronomical observatory of Odessa I.I.Mechnikov National University, Ukraine
  • L. Shakun Astronomical observatory of Odessa I.I.Mechnikov National University, Ukraine
  • S. Melikyants Astronomical observatory of Odessa I.I.Mechnikov National University, Ukraine
  • E. Korobeynikova Astronomical observatory of Odessa I.I.Mechnikov National University, Ukraine
  • S. Strakhova Astronomical observatory of Odessa I.I.Mechnikov National University, Ukraine
  • A. Bilinskyi Astronomical observatory of Lviv I.Franko National University, Ukraine
  • Ye. Vovchyk Astronomical observatory of Lviv I.Franko National University, Ukraine
  • V. Kudak Uzhhorod National University, Laboratory of Space Researches, Ukraine
  • I. Motrunich Uzhhorod National University, Laboratory of Space Researches, Ukraine
  • I. Neubauer Uzhhorod National University, Laboratory of Space Researches, Ukraine
  • O. Kozhukhov National Space Facilities Control and Test Centre of State Space Agency of Ukraine, Ukraine
  • Ya. Romanyuk Astronomical observatory of Kyiv T.G.Shevchenko National University, Ukraine
  • A. Ryabov Astronomical observatory of Odessa I.I.Mechnikov National University, Ukraine
  • S. Terpan Astronomical observatory of Odessa I.I.Mechnikov National University, Ukraine
  • V. Dragomiretsky Astronomical observatory of Odessa I.I.Mechnikov National University, Ukraine
  • T. Golubovskaya Astronomical observatory of Odessa I.I.Mechnikov National University, Ukraine

DOI:

https://doi.org/10.18524/1810-4215.2020.33.216464

Ключові слова:

space object (SO), rotation, attitude, photometry, synchronous observation

Анотація

The photometry of space objects (SO)
makes it possible to determine their state of rotation around
the center of mass, orientation of the rotation axis and
rotation speed in the most cost-effective manner. However,
the methods for determining the attitude parameters from
photometric data from a single observation site (OS) require
long series of high-quality and high-frequency
measurements. We propose a method for determining the
orientation parameters of slowly rotating SO based on
simultaneous multi-site photometry with a high temporal
resolution. Preconditions for planning and building a local
photometric network that can accomplish such a task have
been tested via computer simulation. Synchronous
observations of the unoperated spacecraft TOPEX/Poseidon
were carried out. They were attended by the observatories of
Odessa, Lvov and Uzhgorod universities, as well as the
observation station of the State Space Agency of Ukraine in
Zalistsi, Khmelnytsky region, took part. Synchronous
network-based photometric observations from three OSs
enable us to calculate time lags between correlated light-
curve segments and promptly determine the direction of
rotation, as well as the spatial orientation of a SO’s spin axis
and its angular spin rate. A local network of several
distributed observation sites for synchronous monitoring of
the rotation of various SO in LEO will make it possible to
determine the rotation parameters of also slowly rotating
objects that do not exhibit glints within their light curves.

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Опубліковано

2020-11-16

Номер

Розділ

Solar system