N, t) of your i-th channel inside the range continuous, and envelop the azimuth multichannel impulse response Ssmul,i ( f r , terms, the azimuthfrequency azimuth time domain is rewritten as ( f r , t ) on the i-th channel within the multichannel impulse response Ss mul,i Nalidixic acid (sodium salt) Cell Cycle/DNA Damage follows:(a) Petunidin (chloride) FAK variety frequency azimuth time (domain is rewritten as follows: 2 f + f ) (b)Neglecting the unimportant range frequency modulation, constant, and envelop terms,azimuth multichannel two ( f + f ) reconstruction is mainly operated in the 2D frequency domain, the r c Ss mul,i ( range-variant phase errormul, reconstruction, although the second Doppler t ) exp – R also residual f r ,azimuth jmultichanneli ( t )demands to become compensated within the rangeone The initial phase term is for c ought to be removeddomain. The flowchart of the proposed azimuth multichannel reconstruction system is prior to reconstruction, which could be implemented inside the 2D time do- (20) which rincludes actions xi azimuth 2 ( r + f ) shown in Figure 11, two ( f + f ) of time-varying fphase removing, 2D = exp – j time offsets txi two + in distinct Ri ( t major. Furthermore, different azimuth azimuth cmultichannelvreconstructioninjazimuthc channels Rs – s Rcost.i exp – the 2D frequency)domain, spectrum de-skewing, c c 2vs range-variant de-skewing operation in each and every azimuth channel. Because the azmust be considered in the course of the reconstruction phase error compensation, and 2D spectrum re-skewing. The initial phase term is for azimuth multichannel 2D frequency domain, the imuth multichannel reconstruction is primarily operated in thereconstruction, while the second 1 need to be removed also reconstruction, which could be implemented in Doppler residual range-variant phase error beforeneeds to become compensated within the rangethe 2D time domain. Additionally, distinct azimuth time offsets xi 2vs in distinctive azimuth channels(20) two ( + two frequency r) fc ) Rs t de-skewing. =2D ( – j+ f cfspectrum just after xi + Rcos t.i exp – j two ( fr + fc ) Ri (t) (b) exp f r – 2vs c R c Ss mul,i ( f r , t ) exp – j mul, i ( t ) c The first phase term is for azimuth multichannel reconstruction, although the second Neglecting the unimportant variety frequency modulation, continual, and(20) envelop one particular 2 f + fremoved prior to needs to be terms, ther azimuth multichannel impulse whichSs (berrimplemented channel inside the ,+ f cof the -th inside the 2D time response can two xi ) ( In addition,different reconstruction, x mul,i (ff int )differentiazimuth channels ) c azimuth time exp – j i /2vs = exp domain. -j + Rcost. offsets Ri ( t ) Rs t – range frequency azimuth time domain isi rewritten as follows: c c 2 the has to be regarded duringvs de-skewing operation in each and every azimuth channel. As theSsmul,i ( f r , t)c Figure ten.2D frequency spectrum within the squint case. (a) 2D frequency spectrum prior to de-skewing;exp – jrcRmul,i (t)313 314 315 316318 319domain. The flowchart on the proposed azimuth multichannel reconstruction strategy is shown in Figure 11, which incorporates actions of azimuth time-varying phase removing, 2D spectrum de-skewing, azimuth multichannel reconstruction within the 2D frequency domain, range-variant reconstruction phase error compensation, and 2D spectrum re-skewing.Remote Sens. 2021, 13, 4705 Remote Sens. 2021, 13, x FOR PEER REVIEW13 of 22 14 ofH1,1 ( , t )H1,i ( , t )Variety FFTRange FFTH two,1 ( f r , t )H two,i ( f r , t )Azimuth FFTAzimuth FFTP1 ( f r , f a ; Rref )Pi ( f r , f a ; Rref )Range IFFTRange IFFTP1 ( f r , f a ; R0 )Pi (.