Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2019 5 14.  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)
 05/15/2019   16:50:13   (  68.90, -73.43) 05/15/2019   16:51:17  (  68.89, -73.40)    1.44                64
 05/15/2019   17:40:53   ( -68.76,  94.09) 05/15/2019   17:40:47  ( -68.78,  94.09)    2.46                 6
 05/15/2019   18:31:31   (  68.30, -98.01) 05/15/2019   18:30:20  (  68.34, -98.81)   33.09                71
 05/18/2019   09:06:40   (  68.88,  42.48) 05/18/2019   09:07:46  (  68.88,  42.46)    0.86                66
 05/18/2019   09:57:21   ( -68.79,-150.07) 05/18/2019   09:57:16  ( -68.77,-150.05)    2.22                 5
 05/18/2019   10:47:59   (  68.34,  17.83) 05/18/2019   10:46:47  (  68.44,  17.19)   28.39                72
 05/21/2019   01:23:07   (  68.87, 158.38) 05/21/2019   01:24:15  (  68.86, 158.32)    2.61                68
 05/21/2019   02:13:48   ( -68.77, -34.16) 05/21/2019   02:13:45  ( -68.76, -34.18)    1.57                 3
 05/21/2019   03:04:27   (  68.38, 133.66) 05/21/2019   03:03:15  (  68.48, 133.12)   24.88                72
 05/23/2019   17:39:34   (  68.91, -85.79) 05/23/2019   17:40:42  (  68.90, -85.76)    1.82                68
 05/23/2019   18:30:15   ( -68.80,  81.67) 05/23/2019   18:30:12  ( -68.80,  81.74)    2.97                 3
 05/23/2019   19:20:55   (  68.47,-110.58) 05/23/2019   19:19:42  (  68.51,-110.96)   16.13                73
 05/26/2019   09:56:01   (  68.90,  30.10) 05/26/2019   09:57:11  (  68.88,  30.09)    2.75                70
 05/26/2019   10:46:42   ( -68.79,-162.42) 05/26/2019   10:46:41  ( -68.77,-162.40)    1.74                 1
 05/26/2019   11:37:23   (  68.52,   5.25) 05/26/2019   11:36:10  (  68.55,   4.96)   12.06                73