Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 5 5.  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)
 05/08/2021   08:58:41   ( -69.66,-135.01) 05/08/2021   08:59:13  ( -69.65,-135.02)    0.77                32
 05/08/2021   09:49:25   (  69.55,  32.45) 05/08/2021   09:48:40  (  69.55,  32.48)    1.05                45
 05/11/2021   01:15:01   ( -69.69, -19.12) 05/11/2021   01:15:39  ( -69.68, -19.11)    1.27                38
 05/11/2021   02:05:45   (  69.59, 148.34) 05/11/2021   02:05:06  (  69.57, 148.39)    2.61                39
 05/13/2021   17:31:21   ( -69.73,  96.76) 05/13/2021   17:32:05  ( -69.71,  96.81)    3.29                44
 05/13/2021   18:22:04   (  69.57, -95.70) 05/13/2021   18:21:32  (  69.59, -95.70)    2.01                32
 05/16/2021   09:47:40   ( -69.72,-147.28) 05/16/2021   09:48:31  ( -69.72,-147.29)    0.59                51
 05/16/2021   10:38:24   (  69.62,  20.18) 05/16/2021   10:37:58  (  69.61,  20.20)    1.22                26
 05/16/2021   11:28:49   ( -68.66,-171.16) 05/16/2021   11:27:42  ( -68.73,-173.30)   87.08                67
 05/19/2021   02:03:59   ( -69.76, -31.41) 05/19/2021   02:04:56  ( -69.74, -31.39)    2.95                57
 05/19/2021   02:54:42   (  69.61, 136.13) 05/19/2021   02:54:23  (  69.62, 136.10)    1.78                19
 05/19/2021   03:45:12   ( -68.92, -55.57) 05/19/2021   03:44:03  ( -68.97, -57.13)   62.49                69