Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 5 2.  Predictions up to the next  14.0 days:

     Date     Time(FY3D) FY3D Lat/Lon Date Time(TERRA) TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 05/02/2021   23:35:33   (  70.35,-175.27) 05/02/2021   23:36:41  (  70.29,-173.53)   65.65                68
 05/03/2021   00:26:02   ( -69.61,  -6.81) 05/03/2021   00:26:21  ( -69.62,  -6.83)    1.25                19
 05/03/2021   01:16:46   (  69.51, 160.64) 05/03/2021   01:15:48  (  69.52, 160.68)    1.56                58
 05/05/2021   15:51:57   (  70.59, -59.71) 05/05/2021   15:53:04  (  70.48, -57.36)   87.73                67
 05/05/2021   16:42:22   ( -69.63, 109.09) 05/05/2021   16:42:47  ( -69.66, 109.10)    2.43                25
 05/05/2021   17:33:06   (  69.53, -83.46) 05/05/2021   17:32:14  (  69.55, -83.40)    2.71                52
 05/08/2021   08:58:42   ( -69.66,-135.01) 05/08/2021   08:59:13  ( -69.69,-134.98)    3.16                31
 05/08/2021   09:49:26   (  69.56,  32.44) 05/08/2021   09:48:40  (  69.58,  32.52)    3.28                46
 05/11/2021   01:15:01   ( -69.69, -19.11) 05/11/2021   01:15:38  ( -69.71, -19.07)    3.21                37
 05/11/2021   02:05:44   (  69.53, 148.42) 05/11/2021   02:05:06  (  69.54, 148.35)    2.85                38
 05/13/2021   17:31:21   ( -69.71,  96.78) 05/13/2021   17:32:04  ( -69.73,  96.84)    2.68                43
 05/13/2021   18:22:04   (  69.56, -95.68) 05/13/2021   18:21:32  (  69.56, -95.75)    2.66                32