Study about the effects on range imaging for MEOSAR induced by ionospheric irregularity

Li Liang; Hong Jun; Liu Guikun; Ming Feng

Study about the effects on range imaging for MEOSAR induced by ionospheric irregularity

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Author(s): Li Liang^{1, 2, 3} ; Hong Jun^{1, 2, 3} ; Liu Guikun^{1, 2, 3} ; Ming Feng^{1, 2}
- Affiliations: 1: Aerospace Information Research Institute, Chinese Academy of Sciences , Beijing 100190 , People's Republic of China ;
  2: National Key Lab of Microwave Imaging Technology , Beijing 100190 , People's Republic of China ;
  3: University of Chinese Academy of Sciences , Beijing 100049 , People's Republic of China
Source: Volume 14, Issue 10, October 2020, p. 1610 – 1615
DOI: 10.1049/iet-rsn.2020.0167 , Print ISSN 1751-8784, Online ISSN 1751-8792

This is an open access article published by the IET under the Creative Commons Attribution-NonCommercial-NoDerivs License (http://creativecommons.org/licenses/by-nc-nd/3.0/)

Received 21/04/2020, Accepted 22/06/2020, Revised 02/06/2020, Published 30/07/2020

Based on the mean arrival time and temporal broadening of pulsed waves propagating through turbulent media, this study investigates the ionospheric effects induced by irregularity on medium-earth-orbit synthetic aperture radar (MEOSAR) range imaging quality. Considering radar signal two-way propagating through ionosphere irregularity, an analysis model for ionospheric effects induced by irregularities on MEOSAR range imaging quality is established based on the system characteristics of MEOSAR and ionospheric irregularity parameters. The mode extends the application of pulsed waves propagating through turbulent media to the field of synthetic aperture radar (SAR), and it can be used to analyse the effects on MEOSAR induced by both background ionosphere and ionospheric irregularity. The degradation of range image quality, including deterioration of resolution and shift in the image, due to the ionospheric irregularities is analysed. It is found that the effects induced by ionospheric irregularities will be very serious when the inner and outer scales of ionospheric irregularities are small or the fluctuation is strong. Furthermore, the degradation of resolution and the shift of image will become more and more serious with the increase of SAR orbit height. The results can help to evaluate ionospheric irregularity effects on range imaging for MEOSAR and provide a foundation for the design of MEOSAR.

References

1. 1)
  - 11. Edelstein, W., Madsen, S., Moussessian, A., et al: ‘Concepts and technologies for synthetic aperture radar from MEO and geosynchronous orbits’. Proc. SPIE, Bellingham, USA, 2005, vol. 5659, pp. 195–203.
2. 2)
  - 3. Belcher, D.P.: ‘Theoretical limits on SAR imposed by the ionosphere’, IET Radar Sonar Navig., 2008, 2, (6), pp. 435–448, doi: 10.1049/iet-rsn:20070188.
3. 3)
  - 16. Ji, Y.F., Zhang, Q.L., Zhang, Y.S., et al: ‘Analysis of background ionospheric effects on geosynchronous SAR azimuth imaging’. The 11th European Conf. on Synthetic Aperture Radar, Berlin, Germany, June 2016, pp. 1207–1210.
4. 4)
  - 9. Bruno, D., Hobbs, S.E., Ottavianelli, S.: ‘Geosynchronous synthetic aperture radar: concept design, properties and possible applications’, Acta Astronaut., 2006, 59, pp. 149–156.
5. 5)
  - 4. Xu, Z.W., Wu, J., Wu, Z.S.: ‘Potential effects of the ionosphere on space-based SAR imaging’, IEEE Trans. Geosci. Remote Sens., 2008, 56, (7), pp. 1968–1975.
6. 6)
  - 22. Xu, Z.W., Wu, J.: ‘On the mutual coherence function and mean arrival time of radio propagation through the turbulent ionosphere’, IEEE Trans. Antennas Propag., 2008, 56, (8), pp. 2622–2629.
7. 7)
  - 24. Yeh, K.C., Liu, C.H.: ‘An investigation of temporal moments of stochastic waves’, Radio Sci., 1977, 12, (5), pp. 671–680.
8. 8)
  - 10. Yu, Z., Chen, J., Li, C.S., et al: ‘Concepts, properties and imaging technologies for GEO SAR’. Proc. SPIE, Bellingham, USA, 2008, vol. 7494, pp. 749407/1–749407/8.
9. 9)
  - 21. Xu, Z.W., Wu, J., Huo, W.P., et al: ‘Temporal broadening of pulsed waves propagating through turbulent media’, Sci. China G, 2003, 46, (4), pp. 337–347.
10. 10)
  - 12. Li, L., Hong, J., Ming, F.: ‘Mechanism study of ionospheric effects on medium-earth-orbit SAR’, J. Radars, 2017, 6, (6), pp. 619–629, doi: 10.12000/JR17016.
11. 11)
  - 13. Li, L., Hong, J., Ming, F., et al: ‘Study on ionospheric effects induced by spatio-temporal variability on medium-earth-orbit SAR imaging quality’, J. Electron. Inf. Technol., 2014, 36, (4), pp. 915–922.
12. 12)
  - 23. Shkarofsky, I.P.: ‘Generalized turbulence space-correlation and wave-number spectrum-function pairs’, Can. J. Phys., 1968, 46, pp. 2133–2153.
13. 13)
  - 8. Wang, C., Chen, L., Liu, L.: ‘A new analytical model to study the ionospheric effects on VHF/UHF wideband SAR imaging’, IEEE Trans. Geosci. Remote Sens., 2017, 55, (8), pp. 4545–4557.
14. 14)
  - 6. Belcher, D.P., Cannon, P.S.: ‘Ionospheric effects on synthetic aperture radar (SAR) clutter statistics’, IET Radar Sonar Navig., 2013, 7, (9), pp. 1004–1011, doi: 10.1049/iet-rsn.2012.0227.
15. 15)
  - 5. Belcher, D.P., Rogers, N.C.: ‘Theory and simulation of ionospheric effects on SAR’, IET Radar Sonar Navig., 2009, 3, (5), pp. 541–551, doi: 10.1049/iet-rsn.2008.0205.
16. 16)
  - 2. Xu, Z.W., Wu, J., Wu, Z.S.: ‘A survey of ionospheric effects on space-based radar’, Waves Random Media, 2004, 14, (2), pp. S189–S273.
17. 17)
  - 19. Lee, J.J.: ‘Pulse distortion through a lossy plasma medium’, IEEE Trans. Antennas Propag., 1979, AP-27, (6), pp. 880–885.
18. 18)
  - 14. Li, L., Hong, J.: ‘Study of ionospheric effects on azimuth imaging for medium-earth-orbit SAR’, Prog. Electromagn. Res. M, 2013, 32, pp. 215–228.
19. 19)
  - 7. Belcher, D.P., Cannon, P.S.: ‘Amplitude scintillation effects on SAR’, IET Radar Sonar Navig., 2014, 8, (6), pp. 658–666, doi: 10.1049/iet-rsn.2013.0168.
20. 20)
  - 18. Li, L., Hong, J., Zhou, L.J., et al: ‘Study about ionospheric effects induced by irregularities on MEOSAR range imaging quality’. Progress in Electromagnetics Research Symp., Singapore, November 2017, pp. 37–40.
21. 21)
  - 15. Hu, C., Tian, Y., Yang, X.P., et al: ‘Background ionosphere effects on geosynchronous SAR focusing: theoretical analysis and verification based on the BeiDou navigation satellite system (BDS)’, IEEE J. Sel. Top. Appl. Earth Obs. Remote Sens., 2016, 9, (3), pp. 1143–1162.
22. 22)
  - 1. Quegan, S., Lamont, J.: ‘Ionospheric and tropospheric effects on synthetic aperture radar performance’, Int. J. Remote Sens., 1986, 7, (2), pp. 525–539.
23. 23)
  - 20. Yeh, K.C., Yang, C.C.: ‘Mean arrival time and mean pulsewidth of signals propagating through a dispersive and random medium’, IEEE Trans. Antennas Propag., 1977, AP-25, (5), pp. 710–713.
24. 24)
  - 17. Xiang, M.S., Wang, X.Q., Kou, L.L.: ‘Ionospheric effects on three-dimensional imaging of L-band geosynchronous circular synthetic aperture radar’, IET Radar Sonar Navig., 2014, 8, (8), pp. 875–884.

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Study about the effects on range imaging for MEOSAR induced by ionospheric irregularity

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