Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2019 5 7.  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   16:00:51   (  68.85, -61.00) 05/07/2019   16:01:52  (  68.87, -61.06)    3.24                61
 05/07/2019   16:51:32   ( -68.76, 106.44) 05/07/2019   16:51:22  ( -68.75, 106.42)    1.00                10
 05/07/2019   17:42:07   (  68.14, -85.45) 05/07/2019   17:40:57  (  68.21, -86.60)   48.06                70
 05/10/2019   08:17:18   (  68.88,  54.84) 05/10/2019   08:18:20  (  68.87,  54.81)    1.33                62
 05/10/2019   09:07:59   ( -68.78,-137.71) 05/10/2019   09:07:50  ( -68.76,-137.69)    2.93                 9
 05/10/2019   09:58:35   (  68.22,  30.33) 05/10/2019   09:57:24  (  68.26,  29.34)   40.85                71
 05/13/2019   00:33:45   (  68.85, 170.76) 05/13/2019   00:34:49  (  68.86, 170.69)    3.29                64
 05/13/2019   01:24:26   ( -68.75, -21.79) 05/13/2019   01:24:19  ( -68.75, -21.82)    1.22                 7
 05/13/2019   02:15:03   (  68.25, 146.18) 05/13/2019   02:13:52  (  68.31, 145.28)   37.36                71
 05/15/2019   16:50:13   (  68.88, -73.40) 05/15/2019   16:51:17  (  68.91, -73.38)    3.34                64
 05/15/2019   17:40:54   ( -68.78,  94.06) 05/15/2019   17:40:48  ( -68.75,  94.05)    3.47                 6
 05/15/2019   18:31:31   (  68.28, -97.98) 05/15/2019   18:30:20  (  68.36, -98.78)   34.09                71
 05/18/2019   09:06:41   (  68.91,  42.44) 05/18/2019   09:07:46  (  68.89,  42.48)    2.53                65
 05/18/2019   09:57:21   ( -68.75,-150.02) 05/18/2019   09:57:17  ( -68.73,-150.08)    3.07                 4
 05/18/2019   10:48:00   (  68.36,  17.79) 05/18/2019   10:46:48  (  68.39,  17.14)   26.81                72
 05/21/2019   01:23:07   (  68.89, 158.35) 05/21/2019   01:24:14  (  68.87, 158.34)    2.04                67
 05/21/2019   02:13:48   ( -68.78, -34.18) 05/21/2019   02:13:44  ( -68.77, -34.16)    1.18                 4
 05/21/2019   03:04:27   (  68.40, 133.63) 05/21/2019   03:03:15  (  68.43, 133.07)   23.48                72