Simultaneous Nadir Overpasses (SNOs) between FY3D and AQUA
TLE Epoch: 2021 6 16.  Predictions up to the next  14.0 days:

     Date     Time(FY3D) FY3D Lat/Lon Date Time(AQUA) AQUA Lat/Lon    Distance(km)  Time Diff(sec)
 06/18/2021   03:20:15   (  50.28, 143.72) 06/18/2021   03:20:42  (  50.28, 143.73)    0.66                27
 06/18/2021   04:10:31   ( -48.83, -48.30) 06/18/2021   04:09:42  ( -48.85, -48.02)   20.61                49
 06/20/2021   19:37:04   (  52.01,-101.15) 06/20/2021   19:37:40  (  52.01,-101.15)    0.11                36
 06/20/2021   20:26:40   ( -48.26,  67.88) 06/20/2021   20:26:01  ( -48.28,  68.09)   15.40                39
 06/23/2021   11:53:50   (  53.57,  14.01) 06/23/2021   11:54:35  (  53.57,  14.00)    0.84                45
 06/23/2021   12:42:49   ( -47.69,-175.94) 06/23/2021   12:42:20  ( -47.71,-175.80)   10.11                29
 06/26/2021   04:10:34   (  55.01, 129.18) 06/26/2021   04:11:28  (  55.02, 129.16)    1.65                54
 06/26/2021   04:58:58   ( -47.12, -59.76) 06/26/2021   04:58:39  ( -47.15, -59.70)    5.25                19
 06/28/2021   20:27:39   (  57.70,-116.46) 06/28/2021   20:28:41  (  57.69,-116.43)    1.69                62