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   22:18:12   ( -69.25,  25.14) 02/08/2021   22:17:39  ( -69.22,  25.14)    3.46                33
 02/11/2021   13:43:52   (  69.37, -26.42) 02/11/2021   13:44:35  (  69.39, -26.39)    2.65                43
 02/11/2021   14:34:33   ( -69.27, 141.04) 02/11/2021   14:34:05  ( -69.28, 141.10)    2.33                28
 02/14/2021   06:00:13   (  69.39,  89.48) 02/14/2021   06:01:02  (  69.38,  89.48)    1.17                49
 02/14/2021   06:50:54   ( -69.29,-103.05) 02/14/2021   06:50:32  ( -69.27,-103.02)    1.96                22
 02/14/2021   07:41:21   (  68.27,  65.64) 02/14/2021   07:40:14  (  68.33,  63.43)   90.78                67
 02/16/2021   22:16:33   (  69.42,-154.63) 02/16/2021   22:17:27  (  69.43,-154.57)    2.56                54
 02/16/2021   23:07:13   ( -69.26,  12.92) 02/16/2021   23:06:58  ( -69.27,  12.85)    2.92                15
 02/16/2021   23:57:45   (  68.51,-178.75) 02/16/2021   23:56:36  (  68.54, 179.57)   68.16                69
 02/19/2021   14:32:53   (  69.40, -38.67) 02/19/2021   14:33:54  (  69.41, -38.71)    2.12                61
 02/19/2021   15:23:35   ( -69.34, 128.74) 02/19/2021   15:23:24  ( -69.31, 128.79)    3.28                11
 02/19/2021   16:14:09   (  68.71, -63.08) 02/19/2021   16:12:59  (  68.75, -64.28)   48.90                70
 02/22/2021   06:49:14   (  69.43,  77.21) 02/22/2021   06:50:20  (  69.45,  77.23)    2.08                66
 02/22/2021   07:39:55   ( -69.31,-115.29) 02/22/2021   07:39:51  ( -69.30,-115.35)    2.46                 4
 02/22/2021   08:30:33   (  68.90,  52.59) 02/22/2021   08:29:22  (  68.95,  51.86)   29.88                71