Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 6 9.  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)
 06/09/2021   13:05:17   (  69.77, -16.60) 06/09/2021   13:05:48  (  69.77, -16.65)    2.28                31
 06/09/2021   13:55:58   ( -69.68, 150.86) 06/09/2021   13:55:17  ( -69.71, 150.90)    3.21                41
 06/12/2021   05:21:36   (  69.83,  99.26) 06/12/2021   05:22:13  (  69.82,  99.30)    1.74                37
 06/12/2021   06:12:17   ( -69.73, -93.27) 06/12/2021   06:11:43  ( -69.71, -93.22)    3.36                34
 06/14/2021   21:37:55   (  69.83,-144.80) 06/14/2021   21:38:40  (  69.81,-144.83)    2.22                45
 06/14/2021   22:28:36   ( -69.73,  22.67) 06/14/2021   22:28:10  ( -69.71,  22.66)    2.55                26
 06/17/2021   13:54:14   (  69.84, -28.87) 06/17/2021   13:55:06  (  69.86, -28.89)    2.53                52
 06/17/2021   14:44:55   ( -69.73, 138.61) 06/17/2021   14:44:36  ( -69.76, 138.60)    2.89                19
 06/17/2021   15:35:24   (  68.83, -52.80) 06/17/2021   15:34:17  (  68.86, -54.92)   85.52                67
 06/20/2021   06:10:34   (  69.90,  86.98) 06/20/2021   06:11:32  (  69.90,  87.05)    2.45                58
 06/20/2021   07:01:15   ( -69.78,-105.53) 06/20/2021   07:01:02  ( -69.80,-105.46)    3.14                13
 06/20/2021   07:51:48   (  69.10,  62.77) 06/20/2021   07:50:38  (  69.18,  61.36)   56.37                70
 06/22/2021   22:26:52   (  69.91,-157.09) 06/22/2021   22:27:58  (  69.88,-157.10)    2.86                66
 06/22/2021   23:17:33   ( -69.79,  10.41) 06/22/2021   23:17:28  ( -69.78,  10.40)    0.69                 5
 06/23/2021   00:08:11   (  69.38, 178.32) 06/23/2021   00:06:59  (  69.44, 177.58)   29.80                72