Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 5 27.  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)
 05/29/2021   19:09:23   ( -70.15,  71.76) 05/29/2021   19:10:34  ( -70.01,  72.52)   32.96                71
 05/29/2021   20:00:01   (  69.71,-120.27) 05/29/2021   20:00:04  (  69.74,-120.21)    3.46                 3
 05/29/2021   20:50:40   ( -69.58,  47.26) 05/29/2021   20:49:34  ( -69.57,  47.19)    2.58                66
 06/01/2021   11:25:45   ( -70.35,-172.62) 06/01/2021   11:26:55  ( -70.21,-171.31)   51.46                70
 06/01/2021   12:16:19   (  69.71,  -4.32) 06/01/2021   12:16:29  (  69.71,  -4.36)    1.85                10
 06/01/2021   13:07:00   ( -69.62, 163.13) 06/01/2021   13:05:59  ( -69.61, 163.13)    1.40                61
 06/04/2021   03:42:08   ( -70.55, -57.00) 06/04/2021   03:43:16  ( -70.46, -55.06)   72.49                68
 06/04/2021   04:32:39   (  69.75, 111.55) 06/04/2021   04:32:54  (  69.74, 111.56)    1.49                15
 06/04/2021   05:23:20   ( -69.66, -80.99) 06/04/2021   05:22:24  ( -69.64, -80.95)    3.28                56
 06/06/2021   19:58:31   ( -70.75,  58.61) 06/06/2021   19:59:37  ( -70.70,  61.18)   94.48                66
 06/06/2021   20:48:58   (  69.75,-132.50) 06/06/2021   20:49:19  (  69.76,-132.52)    1.53                21
 06/06/2021   21:39:39   ( -69.65,  34.96) 06/06/2021   21:38:49  ( -69.66,  34.97)    0.89                50
 06/09/2021   13:05:17   (  69.80, -16.64) 06/09/2021   13:05:43  (  69.78, -16.62)    2.71                26
 06/09/2021   13:55:58   ( -69.70, 150.83) 06/09/2021   13:55:13  ( -69.68, 150.88)    2.89                45