Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2019 5 21.  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)
 05/23/2019   17:39:34   (  68.87, -85.74) 05/23/2019   17:40:43  (  68.86, -85.80)    2.82                69
 05/23/2019   18:30:15   ( -68.77,  81.72) 05/23/2019   18:30:13  ( -68.75,  81.69)    2.50                 2
 05/23/2019   19:20:55   (  68.43,-110.53) 05/23/2019   19:19:43  (  68.47,-111.00)   20.06                72
 05/26/2019   09:56:02   (  68.90,  30.10) 05/26/2019   09:57:11  (  68.88,  30.11)    2.35                69
 05/26/2019   10:46:43   ( -68.80,-162.44) 05/26/2019   10:46:41  ( -68.78,-162.39)    3.07                 2
 05/26/2019   11:37:23   (  68.47,   5.31) 05/26/2019   11:36:10  (  68.55,   4.98)   16.69                73
 05/29/2019   02:12:28   (  68.89, 146.00) 05/29/2019   02:13:38  (  68.90, 146.01)    1.63                70
 05/29/2019   03:03:09   ( -68.78, -46.53) 05/29/2019   03:03:08  ( -68.80, -46.48)    2.98                 1
 05/29/2019   03:53:50   (  68.50, 121.14) 05/29/2019   03:52:37  (  68.57, 120.88)   13.15                73
 05/31/2019   18:28:55   (  68.87, -98.09) 05/31/2019   18:30:07  (  68.86, -98.16)    3.01                72
 05/31/2019   19:19:36   ( -68.75,  69.39) 05/31/2019   19:19:37  ( -68.76,  69.35)    1.59                 1
 05/31/2019   20:10:18   (  68.54,-123.02) 05/31/2019   20:09:05  (  68.58,-123.22)    9.40                73
 06/03/2019   10:45:23   (  68.91,  17.74) 06/03/2019   10:46:34  (  68.92,  17.80)    2.93                71
 06/03/2019   11:36:04   ( -68.79,-174.78) 06/03/2019   11:36:05  ( -68.77,-174.76)    2.09                 1
 06/03/2019   12:26:46   (  68.58,  -7.19) 06/03/2019   12:25:33  (  68.59,  -7.33)    5.81                73