Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 2 8.  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)
 02/08/2021   21:27:31   (  69.35,-142.32) 02/08/2021   21:28:09  (  69.32,-142.35)    2.91                38
 02/08/2021   22:18:12   ( -69.26,  25.13) 02/08/2021   22:17:38  ( -69.27,  25.20)    3.08                34
 02/11/2021   13:43:52   (  69.37, -26.42) 02/11/2021   13:44:35  (  69.38, -26.40)    0.99                43
 02/11/2021   14:34:33   ( -69.27, 141.04) 02/11/2021   14:34:05  ( -69.27, 141.09)    2.01                28
 02/14/2021   06:00:13   (  69.39,  89.47) 02/14/2021   06:01:02  (  69.37,  89.47)    3.13                49
 02/14/2021   06:50:53   ( -69.24,-102.98) 02/14/2021   06:50:32  ( -69.26,-103.04)    3.39                21
 02/14/2021   07:41:21   (  68.27,  65.63) 02/14/2021   07:40:14  (  68.31,  63.42)   91.20                67
 02/16/2021   22:16:33   (  69.42,-154.64) 02/16/2021   22:17:27  (  69.41,-154.60)    2.20                54
 02/16/2021   23:07:14   ( -69.31,  12.84) 02/16/2021   23:06:57  ( -69.30,  12.90)    2.40                17
 02/16/2021   23:57:44   (  68.46,-178.68) 02/16/2021   23:56:36  (  68.52, 179.55)   72.25                68
 02/19/2021   14:32:53   (  69.40, -38.67) 02/19/2021   14:33:54  (  69.39, -38.74)    2.87                61
 02/19/2021   15:23:34   ( -69.28, 128.82) 02/19/2021   15:23:24  ( -69.29, 128.76)    2.33                10
 02/19/2021   16:14:09   (  68.70, -63.08) 02/19/2021   16:12:59  (  68.72, -64.31)   50.02                70