Synthetic Aperture Orbital Telescope for Earth Remote Sensing Equipment
https://doi.org/10.21122/2220-9506-2018-9-4-280-287
Abstract
The object of the research is the development of the method of aperture synthesis of a mirror system designed for remote sensing of the Earth.
The analysis of existing methods for the formation of the synthesized aperture was carried out, their accuracy, cost, and mass-dimensional characteristics were evaluated. A new version of the optical system of the synthetic aperture mirror lens is presented and its optimization is performed in the Zemax software package. An estimate of the accuracy of the designed system has been made; a design variant has been developed that includes a transformation mechanism when the telescope is put into near-earth orbit.
As a result of the study, the design parameters of the base lens were determined: a focal length of 13 m, a main mirror diameter of 800 mm, a field angle of 0.25° for modifying a telescope for a low orbit; and the entire telescope as a whole: the lag from the main axis of the telescope is 1.2 m, the angle of rotation of the flat mirror for combining images (45 + 1,5)°, the signal-to-noise ratio (189 in a low orbit with an angle of the Sun 0°, 15 in the geostationary orbit with a sun angle of 60°).
It has been established that the use of aperture synthesis technology allows the development of highresolution optical-electronic systems with lower production and operation costs compared with classical methods for forming the surface of the main mirror. In the course of the simulation, the instability of the values of the frequency-contrast characteristic with increasing angle of view was determined, which is important for a low near-earth orbit, and the requirement for positioning elements of the optical system was established.
About the Authors
D. A. Kozhevnikov
Belarusian National Technical University
Belarus
Belarus
Address for correspondence: Kozhevnikov D.A. – Belarusian National Technical University, Nezavisimosty Ave., 65, Minsk 220013, Belarus. e-mail: dmkz.1408@gmail.com; feod@tut.by
R. V. Fiodоrtsev
Belarusian National Technical University
Belarus
Belarus
A. r Silie
Belarusian National Technical University;
National Center of Optical Technologies
Venezuela, Bolivarian Republic of
Venezuela, Bolivarian Republic of
References
1. Sharing Earth Observation Resources. eoPortal Directory. Satellite Missions. European Space Agency. ESA 2000-2018. Available at: https://earth.esa.int/web/eoportal/satellite-missions
2. QuickBird Imagery Products. Product Guide. DigitalGlobe, Inc. Revision 4.7.1. Release Date: 1 May 2006, 78 p.
3. Kobernichenko V.G., Trenikhin V.A. [Methods of image synthesis based on remote sensing data of the earth of various resolutions]. Successes of modern radio electronics, 2007, no. 4, pp. 22–31 (in Russian).
4. Malinnikov V.A., Stetsenko A.F., Altynov A.E., Popov S.M. Monitoring prirodnoy sredi aerokosmicheskimi sredstwami [Monitoring the natural environment by aerospace tools], Moscow, MIIGAiK Publ., 2008, 173 p. (in Russian).
5. Demin A.V. Mathematical model of the process of adjustment of composite mirrors // News of universities. Instrument making. – 2015. – Vol. 58, no. 11, pp. 901–907 (in Russian). DOI: 10.17586/0021-3454-2015-58-11-901-907
6. Curtis Baffes, Terry Mast, Jerry Nelson, Eric Ponslet, Vince Stephens, Larry Stepp, Eric C. Williams. Primary Mirror Segmentation Studies for the Thirty Meter Telescope. SPIE 7018-29, TMT.OPT.JOU.08.003. REL01, JPL CL#08-1541. – 15 p.
7. Sabelhaus P.A., Decker J.E. An overview of the James Webb Space Telescope (JWST) project. Proceeding of SPIE, 2004, vol. 5487, 14 p. DOI: 10.1117/12.549895
8. Demin A.V., Kovalev I.A. The Mathematical model and the simulation modelling algorithm of the multitiered mechanical system. ABC Journal of Advanced Research, 2013, мol. 2(1), is. 3, pp. 44–48. DOI: 10.18034/abcjar.v2il.427
9. Gardner J.P., Mather J.C., Clampin M., Doyon R., Greenhouse M.A., Hammel H.B., Wright G.S. The James Webb space telescope. Space Science Reviews, 2006, vol. 123(4), pp. 485-606. DOI: https://doi.org/10.1007/s11214-006-8315-7
10. Ermolaeva E.V., Zverev V.A., Filatov A.A. Adaptivnaya optika [Adaptive optics]. – SPb: NRU ITMO, 2012. – 297 p. (in Russian).
Review
For citations:
Kozhevnikov D.A., Fiodоrtsev R.V., Silie A.r. Synthetic Aperture Orbital Telescope for Earth Remote Sensing Equipment. Devices and Methods of Measurements. 2018;9(4):280-287. https://doi.org/10.21122/2220-9506-2018-9-4-280-287
Views:
1125
Email this article 