Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2019 5 13.  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   16:50:12   (  68.86, -73.38) 05/15/2019   16:51:17  (  68.87, -73.43)    2.41                65
 05/15/2019   17:40:53   ( -68.77,  94.07) 05/15/2019   17:40:47  ( -68.76,  94.06)    1.48                 6
 05/15/2019   18:31:31   (  68.32, -98.03) 05/15/2019   18:30:19  (  68.37, -98.77)   31.06                72
 05/18/2019   09:06:40   (  68.90,  42.46) 05/18/2019   09:07:45  (  68.90,  42.49)    1.11                65
 05/18/2019   09:57:21   ( -68.80,-150.09) 05/18/2019   09:57:15  ( -68.79,-150.02)    2.80                 6
 05/18/2019   10:47:59   (  68.35,  17.81) 05/18/2019   10:46:47  (  68.40,  17.15)   27.78                72
 05/21/2019   01:23:07   (  68.88, 158.37) 05/21/2019   01:24:14  (  68.87, 158.32)    2.30                67
 05/21/2019   02:13:48   ( -68.78, -34.17) 05/21/2019   02:13:44  ( -68.76, -34.18)    1.92                 4
 05/21/2019   03:04:27   (  68.39, 133.65) 05/21/2019   03:03:15  (  68.42, 133.05)   24.57                72
 05/23/2019   17:39:34   (  68.87, -85.73) 05/23/2019   17:40:42  (  68.88, -85.78)    2.43                68
 05/23/2019   18:30:15   ( -68.76,  81.73) 05/23/2019   18:30:12  ( -68.77,  81.72)    1.98                 3
 05/23/2019   19:20:55   (  68.43,-110.52) 05/23/2019   19:19:42  (  68.49,-110.98)   20.12                73
 05/26/2019   09:56:01   (  68.91,  30.10) 05/26/2019   09:57:09  (  68.88,  30.11)    2.91                68
 05/26/2019   10:46:42   ( -68.79,-162.43) 05/26/2019   10:46:39  ( -68.78,-162.39)    2.27                 3
 05/26/2019   11:37:21   (  68.41,   5.38) 05/26/2019   11:36:09  (  68.49,   4.90)   21.26                72