Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2019 5 18.  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)
 05/18/2019   09:06:40   (  68.87,  42.50) 05/18/2019   09:07:46  (  68.90,  42.48)    3.30                66
 05/18/2019   09:57:21   ( -68.77,-150.05) 05/18/2019   09:57:16  ( -68.78,-150.03)    1.26                 5
 05/18/2019   10:48:00   (  68.37,  17.78) 05/18/2019   10:46:48  (  68.40,  17.14)   26.24                72
 05/21/2019   01:23:07   (  68.90, 158.33) 05/21/2019   01:24:14  (  68.88, 158.34)    2.74                67
 05/21/2019   02:13:47   ( -68.75, -34.14) 05/21/2019   02:13:44  ( -68.77, -34.16)    2.11                 3
 05/21/2019   03:04:27   (  68.41, 133.62) 05/21/2019   03:03:15  (  68.44, 133.07)   22.42                72
 05/23/2019   17:39:34   (  68.89, -85.76) 05/23/2019   17:40:42  (  68.92, -85.73)    3.16                68
 05/23/2019   18:30:14   ( -68.73,  81.77) 05/23/2019   18:30:13  ( -68.75,  81.70)    3.66                 1
 05/23/2019   19:20:55   (  68.45,-110.55) 05/23/2019   19:19:42  (  68.53,-110.94)   17.81                73
 05/26/2019   09:56:01   (  68.88,  30.13) 05/26/2019   09:57:11  (  68.89,  30.12)    1.80                70
 05/26/2019   10:46:42   ( -68.77,-162.40) 05/26/2019   10:46:41  ( -68.79,-162.38)    2.49                 1
 05/26/2019   11:37:23   (  68.49,   5.27) 05/26/2019   11:36:10  (  68.56,   4.99)   13.98                73
 05/29/2019   02:12:28   (  68.87, 146.03) 05/29/2019   02:13:40  (  68.87, 145.97)    2.26                72
 05/29/2019   03:03:09   ( -68.76, -46.50) 05/29/2019   03:03:10  ( -68.77, -46.52)    1.81                 1
 05/29/2019   03:53:51   (  68.54, 121.10) 05/29/2019   03:52:38  (  68.60, 120.91)    9.89                73
 05/31/2019   18:28:55   (  68.92, -98.16) 05/31/2019   18:30:07  (  68.90, -98.11)    2.74                72
 05/31/2019   19:19:36   ( -68.80,  69.33) 05/31/2019   19:19:37  ( -68.80,  69.40)    2.84                 1
 05/31/2019   20:10:18   (  68.59,-123.08) 05/31/2019   20:09:05  (  68.63,-123.18)    5.54                73