Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2020 1 15.  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)
 01/17/2020   04:34:19   ( -68.88, -69.59) 01/17/2020   04:35:21  ( -68.88, -69.53)    2.27                62
 01/17/2020   05:25:03   (  68.74,  97.89) 01/17/2020   05:24:49  (  68.73,  97.92)    2.15                14
 01/17/2020   06:15:36   ( -68.23, -94.11) 01/17/2020   06:14:25  ( -68.28, -94.99)   37.03                71
 01/19/2020   20:50:44   ( -68.87,  46.32) 01/19/2020   20:51:55  ( -68.87,  46.32)    0.31                71
 01/19/2020   21:41:28   (  68.74,-146.20) 01/19/2020   21:41:23  (  68.72,-146.24)    3.21                 5
 01/19/2020   22:32:06   ( -68.54,  21.38) 01/19/2020   22:30:53  ( -68.55,  21.19)    7.78                73
 01/22/2020   13:07:13   ( -69.13, 161.86) 01/22/2020   13:08:25  ( -69.05, 162.40)   23.19                72
 01/22/2020   13:57:53   (  68.79, -30.37) 01/22/2020   13:57:55  (  68.78, -30.30)    3.33                 2
 01/22/2020   14:48:33   ( -68.64, 137.15) 01/22/2020   14:47:26  ( -68.62, 137.13)    3.15                67
 01/25/2020   05:23:44   ( -69.44, -82.68) 01/25/2020   05:24:54  ( -69.35, -81.35)   53.08                70
 01/25/2020   06:14:18   (  68.79,  85.53) 01/25/2020   06:14:29  (  68.80,  85.58)    2.43                11
 01/25/2020   07:04:58   ( -68.64,-106.94) 01/25/2020   07:04:00  ( -68.64,-106.98)    1.57                58
 01/27/2020   21:40:16   ( -69.81,  32.68) 01/27/2020   21:41:23  ( -69.67,  34.93)   87.91                67
 01/27/2020   22:30:43   (  68.79,-158.57) 01/27/2020   22:31:04  (  68.79,-158.58)    0.55                21
 01/27/2020   23:21:24   ( -68.68,   8.89) 01/27/2020   23:20:34  ( -68.69,   8.93)    1.66                50