Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 2 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)
 02/06/2021   05:11:11   (  69.35, 101.75) 02/06/2021   05:11:42  (  69.36, 101.81)    2.39                31
 02/06/2021   06:01:51   ( -69.20, -90.72) 02/06/2021   06:01:13  ( -69.19, -90.78)    2.86                38
 02/08/2021   21:27:32   (  69.37,-142.35) 02/08/2021   21:28:09  (  69.36,-142.31)    2.11                37
 02/08/2021   22:18:12   ( -69.22,  25.18) 02/08/2021   22:17:39  ( -69.25,  25.18)    3.38                33
 02/11/2021   13:43:51   (  69.34, -26.38) 02/11/2021   13:44:35  (  69.36, -26.43)    2.70                44
 02/11/2021   14:34:32   ( -69.24, 141.09) 02/11/2021   14:34:05  ( -69.25, 141.07)    1.84                27
 02/14/2021   06:00:12   (  69.37,  89.51) 02/14/2021   06:01:02  (  69.36,  89.45)    2.68                50
 02/14/2021   06:50:53   ( -69.26,-103.01) 02/14/2021   06:50:32  ( -69.25,-103.05)    1.56                21
 02/14/2021   07:41:20   (  68.24,  65.67) 02/14/2021   07:40:14  (  68.30,  63.40)   93.41                66
 02/16/2021   22:16:33   (  69.40,-154.60) 02/16/2021   22:17:28  (  69.40,-154.60)    0.78                55
 02/16/2021   23:07:14   ( -69.28,  12.88) 02/16/2021   23:06:58  ( -69.30,  12.90)    2.55                16
 02/16/2021   23:57:45   (  68.49,-178.72) 02/16/2021   23:56:36  (  68.57, 179.61)   68.37                69