Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 2 6.  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   (  69.34, 101.76) 02/06/2021   05:11:42  (  69.36, 101.81)    3.29                31
 02/06/2021   06:01:51   ( -69.20, -90.72) 02/06/2021   06:01:13  ( -69.19, -90.77)    2.31                38
 02/08/2021   21:27:32   (  69.36,-142.34) 02/08/2021   21:28:09  (  69.37,-142.30)    1.76                37
 02/08/2021   22:18:12   ( -69.27,  25.12) 02/08/2021   22:17:38  ( -69.26,  25.19)    3.15                34
 02/11/2021   13:43:52   (  69.38, -26.44) 02/11/2021   13:44:35  (  69.37, -26.42)    2.32                43
 02/11/2021   14:34:32   ( -69.23, 141.10) 02/11/2021   14:34:05  ( -69.26, 141.08)    3.29                27
 02/14/2021   06:00:12   (  69.36,  89.53) 02/14/2021   06:01:02  (  69.36,  89.46)    2.64                50
 02/14/2021   06:50:53   ( -69.25,-103.00) 02/14/2021   06:50:32  ( -69.26,-103.04)    1.94                21
 02/14/2021   07:41:21   (  68.29,  65.61) 02/14/2021   07:40:14  (  68.31,  63.41)   90.50                67
 02/16/2021   22:16:33   (  69.38,-154.58) 02/16/2021   22:17:28  (  69.41,-154.59)    3.00                55
 02/16/2021   23:07:14   ( -69.27,  12.90) 02/16/2021   23:06:59  ( -69.25,  12.83)    3.12                15
 02/16/2021   23:57:45   (  68.48,-178.70) 02/16/2021   23:56:37  (  68.52, 179.56)   71.14                68
 02/19/2021   14:32:53   (  69.41, -38.69) 02/19/2021   14:33:54  (  69.40, -38.72)    1.94                61
 02/19/2021   15:23:34   ( -69.29, 128.80) 02/19/2021   15:23:24  ( -69.30, 128.78)    1.20                10
 02/19/2021   16:14:09   (  68.72, -63.10) 02/19/2021   16:12:59  (  68.73, -64.30)   48.54                70