Simultaneous Nadir Overpasses (SNOs) between FY3D and AQUA
TLE Epoch: 2021 5 12.  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)
 05/14/2021   06:05:29   (  46.10, 103.64) 05/14/2021   06:06:25  (  46.11, 103.68)    2.99                56
 05/14/2021   06:56:30   ( -47.23, -89.49) 05/14/2021   06:56:09  ( -47.31, -89.13)   28.66                21
 05/16/2021   22:22:07   (  47.18,-140.85) 05/16/2021   22:23:12  (  47.18,-140.85)    0.64                65
 05/16/2021   23:12:39   ( -46.64,  26.69) 05/16/2021   23:12:28  ( -46.71,  26.98)   23.59                11
 05/19/2021   14:39:18   (  50.21, -26.22) 05/19/2021   14:40:31  (  50.21, -26.19)    2.32                73
 05/19/2021   15:28:49   ( -46.16, 142.82) 05/19/2021   15:28:47  ( -46.18, 143.06)   18.49                 2
 05/22/2021   07:01:42   (  70.56,  73.01) 05/22/2021   07:02:55  (  70.70,  73.94)   37.79                73
 05/22/2021   07:45:07   ( -46.09,-101.21) 05/22/2021   07:45:15  ( -46.13,-101.04)   13.84                 8
 05/22/2021   08:37:05   (  50.15,  64.38) 05/22/2021   08:35:54  (  50.28,  64.94)   42.62                71
 05/24/2021   23:24:20   (  80.00,  93.84) 05/24/2021   23:25:33  (  80.55,  91.97)   70.66                73
 05/25/2021   00:01:26   ( -46.08,  14.73) 05/25/2021   00:01:43  ( -46.08,  14.86)    9.61                17