IEEE Geoscience and Remote Sensing Magazine - September 2022 - 167

SAR autofocusing, " Remote Sens., vol. 11, no. 3, p. 340, 2019,
doi: 10.3390/rs11030340.
[74] A. Evers and J. Jackson, " A generalized phase gradient autofocus
algorithm, " IEEE Trans. Comput. Imag., vol. 5, no. 4, p. 1,
2019, doi: 10.1109/TCI.2019.2899453.
[75] X. Mao, L. Ding, Y. Zhang, R. Zhan, and S. Li, " Knowledgeaided
2-D autofocus for spotlight SAR filtered backprojection
imagery, " IEEE Trans. Geosci. Remote Sens., vol. 57, no. 11, pp.
1-18, 2019, doi: 10.1109/TGRS.2019.2924221.
[76] A. Sommer and J. Ostermann, " Backprojection subimage autofocus
of moving ships for synthetic aperture radar, " IEEE
Trans. Geosci. Remote Sens., vol. 57, no. 11, pp. 1-11, 2019, doi:
10.1109/TGRS.2019.2920779.
[77] Y. Liang, G. Li, J. Wen, G. Zhang, Y. Dang, and M. Xing, " A
fast time-domain SAR imaging and corresponding autofocus
method based on hybrid coordinate system, " IEEE Trans. Geosci.
Remote Sens., vol. 57, no. 11, pp. 1-14, 2019, doi: 10.1109/
TGRS.2019.2921917.
[78] J.-W. Kim, Y.-D. Kim, T.-D. Yeo, S.-T. Khang, and J.-W. Yu, " Fast
fourier-domain optimization using hybrid L1-/Lp-norm for autofocus
in airborne SAR imaging, " IEEE Trans. Geosci. Remote Sens.,
vol. 57, no. 10, pp. 1-21, 2019, doi: 10.1109/TGRS.2019.2917516.
[79] J. Wu, Y. Li, W. Pu, Z. Li, and J. Yang, " An effective autofocus
method for fast factorized back-projection, " IEEE Trans. Geosci.
Remote Sens., vol. 57, no. 8, pp. 6145-6154, 2019, doi: 10.1109/
TGRS.2019.2904608.
[80] J. M. Kantor, " Polar format-based compressive SAR image
reconstruction with integrated autofocus, " IEEE Trans. Geosci.
Remote Sens., vol. 58, no. 5, pp. 1-11, 2019, doi: 10.1109/
TGRS.2019.2956432.
[81] R. S. G. Walter, G. Carrara, and R. M. Majewski, Spotlight Synthetic
Aperture Radar: Signal Processing Algorithms. Norwood,
MA, USA: Artech House, 1995.
[82] Y. Wei, Y. Tat Soon, and B. Zheng, " Weighted least-squares estimation
of phase errors for SAR/ISAR autofocus, " IEEE Trans.
Geosci. Remote Sens., vol. 37, no. 5, pp. 2487-2494, 1999, doi:
10.1109/36.789644.
[83] I. G. Cumming, Digital Processing of Synthetic Aperture Radar
Data. Norwood, MA, USA: Artech House, 2005.
[84] A. Amein, F. M. Ahmed, M. A. Ahmed, and N. Mikhail,
" Phase gradient autofocusing technique (PGA), " in Proc. Int.
Conf. Elect. Eng., 2010, vol. 7, no. 7, pp. 1-6, doi: 10.21608/
iceeng.2010.33468.
[85] A. Reigber, " Correction of residual motion errors in airborne
SAR interferometry, " Electron. Lett., vol. 37, no. 17, pp. 1083-
1084, 2001, doi: 10.1049/el:20010724.
[86] P. Prats and J. J. Mallorqui, " Estimation of azimuth phase undulations
with multisquint processing in airborne interferometric
SAR images, " IEEE Trans. Geosci. Remote Sens., vol. 41,
no. 6, pp. 1530-1533, 2003, doi: 10.1109/TGRS.2003.814140.
[87] A. Reigber, P. Prats, and J. J. Mallorqui, " Refined estimation of
time-varying baseline errors in airborne SAR interferometry, "
IEEE Geosci. Remote Sens. Lett., vol. 3, no. 1, pp. 145-149, 2006,
doi: 10.1109/LGRS.2005.860482.
[88] H. Wang, J. Zhu, H. Fu, G. Feng, and C. Wang, " Modeling and
robust estimation for the residual motion error in airborne
SEPTEMBER 2022 IEEE GEOSCIENCE AND REMOTE SENSING MAGAZINE
SAR interferometry, " IEEE Geosci. Remote Sens. Lett., vol. 16, no.
1, pp. 65-69, 2018, doi: 10.1109/LGRS.2018.2867868.
[89] N. Cao et al., " Estimation of residual motion errors in airborne
SAR interferometry based on time-domain backprojection
and multisquint techniques, " IEEE Trans. Geosci. Remote Sens.,
vol. 56, no. 4, pp. 2397-2407, 2017, doi: 10.1109/TGRS.2017.
2779852.
[90] M. Azcueta and S. Tebaldini, " Potential for absolute ionosphere
and clock correction in noncooperative bistatic SAR, "
IEEE Trans. Geosci. Remote Sens., vol. 58, no. 1, pp. 363-377,
2020, doi: 10.1109/TGRS.2019.2936569.
[91] G. Krieger et al., " MirrorSAR: A fractionated space radar for bistatic,
multistatic and high-resolution wide-swath SAR imaging, "
in Proc. 2017 IEEE Int. Geosci. Remote Sens. Symp. (IGARSS),
pp. 149-152, doi: 10.1109/IGARSS.2017.8126916.
[92] G. Krieger, M. Zonno, J. Mittermayer, A. Moreira, S. Huber,
and M. Rodriguez-Cassola, " MirrorSAR: A fractionated space
transponder concept for the implementation of low-cost multistatic
SAR missions, " in Proc. 2018 12th Eur. Conf. Synthetic
Aperture Radar (EUSAR), pp. 1-6.
[93] J. Mittermayer et al., " MirrorSAR: An HRWS add-on for
single-pass multi-baseline SAR interferometry, " IEEE Trans.
Geosci. Remote Sens., vol. 60, pp. 1-18, Dec. 2021, doi: 10.1109/
TGRS.2021.3132384.
[94] P. Xiao, B. Liu, and W. Guo, " ConGaLSAR: A constellation of
geostationary and low earth orbit synthetic aperture radar, "
IEEE Geosci. Remote Sens. Lett., vol. 17, no. 12, pp. 2085-2089,
2020, doi: 10.1109/LGRS.2019.2962574.
[95] N. Hinkley et al., " An atomic clock with 10-18 instability, " Science,
vol. 341, no. 6151, pp. 1215-1218, 2013, doi: 10.1126/science.1240420.
[96]
T. L. Nicholson et al., " Systematic evaluation of an atomic clock
at 2 × 10−18 total uncertainty, " Nature Commun., vol. 6, no. 1, p.
6896, 2015, doi: 10.1038/ncomms7896.
[97] W. F. McGrew et al., " Atomic clock performance enabling geodesy
below the centimetre level, " Nature, vol. 564, no. 7734,
pp. 87-90, 2018, doi: 10.1038/s41586-018-0738-2.
[98] L. Liu et al., " In-orbit operation of an atomic clock based on
laser-cooled 87Rb atoms, " Nature Commun., vol. 9, no. 1, 2018,
Art. no. 2760, doi: 10.1038/s41467-018-05219-z.
[99] A. D. Ludlow et al., " Sr Lattice clock at 1 × 10-16 fractional uncertainty
by remote optical evaluation with a Ca clock, " Science, vol. 319,
no. 5871, pp. 1805-1808, 2008, doi: 10.1126/science.1153341.
[100] N. Nemitz et al., " Frequency ratio of Yb and Sr clocks with 5 × 10−17
uncertainty at 150 seconds averaging time, " Nature Photon.,
vol. 10, no. 4, pp. 258-261, 2016, doi: 10.1038/nphoton.2016.20.
[101] D. S'wierad et al., " Ultra-stable clock laser system development
towards space applications, " Sci. Rep., vol. 6, no. 1, p. 33,973,
2016, doi: 10.1038/srep33973.
[102] E. Oelker et al., " Demonstration of 4.8 × 10−17 stability at 1 s for
two independent optical clocks, " Nature Photon., vol. 13, no.
10, pp. 714-719, 2019, doi: 10.1038/s41566-019-0493-4.
[103] M. Lezius et al., " Space-borne frequency comb metrology, "
Optica, vol. 3, no. 12, p. 1381, 2016, doi: 10.1364/
OPTICA.3.001381.
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