Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2019 5 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)
 05/15/2019   16:50:13   (  68.87, -73.38) 05/15/2019   16:51:18  (  68.87, -73.43)    1.98                65
 05/15/2019   17:40:54   ( -68.78,  94.06) 05/15/2019   17:40:48  ( -68.76,  94.06)    2.86                 6
 05/15/2019   18:31:32   (  68.32, -98.03) 05/15/2019   18:30:20  (  68.37, -98.77)   30.66                72
 05/18/2019   09:06:40   (  68.90,  42.46) 05/18/2019   09:07:45  (  68.91,  42.50)    2.60                65
 05/18/2019   09:57:20   ( -68.75,-150.02) 05/18/2019   09:57:16  ( -68.75,-150.07)    2.12                 4
 05/18/2019   10:47:59   (  68.35,  17.81) 05/18/2019   10:46:47  (  68.42,  17.17)   27.45                72
 05/21/2019   01:23:07   (  68.87, 158.37) 05/21/2019   01:24:14  (  68.90, 158.36)    2.97                67
 05/21/2019   02:13:48   ( -68.78, -34.17) 05/21/2019   02:13:44  ( -68.79, -34.14)    2.18                 4
 05/21/2019   03:04:27   (  68.38, 133.65) 05/21/2019   03:03:15  (  68.46, 133.09)   24.46                72
 05/23/2019   17:39:35   (  68.90, -85.78) 05/23/2019   17:40:43  (  68.88, -85.78)    2.33                68
 05/23/2019   18:30:16   ( -68.80,  81.67) 05/23/2019   18:30:13  ( -68.78,  81.72)    3.25                 3
 05/23/2019   19:20:55   (  68.41,-110.50) 05/23/2019   19:19:43  (  68.50,-110.98)   21.67                72
 05/26/2019   09:56:02   (  68.88,  30.13) 05/26/2019   09:57:12  (  68.86,  30.08)    2.90                70
 05/26/2019   10:46:43   ( -68.77,-162.40) 05/26/2019   10:46:42  ( -68.76,-162.42)    1.34                 1
 05/26/2019   11:37:24   (  68.49,   5.27) 05/26/2019   11:36:11  (  68.53,   4.94)   13.91                73
 05/29/2019   02:12:29   (  68.91, 145.97) 05/29/2019   02:13:39  (  68.89, 146.00)    1.96                70
 05/29/2019   03:03:10   ( -68.80, -46.55) 05/29/2019   03:03:09  ( -68.80, -46.49)    2.46                 1
 05/29/2019   03:53:51   (  68.52, 121.11) 05/29/2019   03:52:38  (  68.56, 120.86)   11.02                73