Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2019 5 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)
 05/07/2019   16:00:52   (  68.90, -61.06) 05/07/2019   16:01:52  (  68.88, -61.05)    2.01                60
 05/07/2019   16:51:32   ( -68.75, 106.46) 05/07/2019   16:51:22  ( -68.76, 106.43)    1.53                10
 05/07/2019   17:42:06   (  68.13, -85.44) 05/07/2019   17:40:56  (  68.21, -86.59)   48.49                70
 05/10/2019   08:17:18   (  68.86,  54.86) 05/10/2019   08:18:20  (  68.88,  54.82)    1.86                62
 05/10/2019   09:07:59   ( -68.77,-137.69) 05/10/2019   09:07:50  ( -68.76,-137.69)    0.80                 9
 05/10/2019   09:58:35   (  68.21,  30.35) 05/10/2019   09:57:24  (  68.27,  29.35)   41.41                71
 05/13/2019   00:33:46   (  68.89, 170.71) 05/13/2019   00:34:49  (  68.87, 170.69)    2.42                63
 05/13/2019   01:24:26   ( -68.74, -21.77) 05/13/2019   01:24:19  ( -68.76, -21.81)    3.08                 7
 05/13/2019   02:15:03   (  68.23, 146.20) 05/13/2019   02:13:52  (  68.31, 145.29)   38.36                71
 05/15/2019   16:50:14   (  68.91, -73.44) 05/15/2019   16:51:17  (  68.91, -73.37)    2.85                63
 05/15/2019   17:40:54   ( -68.76,  94.09) 05/15/2019   17:40:48  ( -68.75,  94.06)    1.53                 6
 05/15/2019   18:31:32   (  68.31, -98.02) 05/15/2019   18:30:20  (  68.36, -98.78)   31.44                72
 05/18/2019   09:06:41   (  68.89,  42.47) 05/18/2019   09:07:46  (  68.89,  42.48)    0.59                65
 05/18/2019   09:57:21   ( -68.78,-150.06) 05/18/2019   09:57:15  ( -68.79,-150.01)    2.21                 6
 05/18/2019   10:47:59   (  68.34,  17.83) 05/18/2019   10:46:47  (  68.39,  17.14)   28.56                72