Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2019 5 23.  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   (  68.86, -85.73) 05/23/2019   17:40:43  (  68.87, -85.79)    2.65                69
 05/23/2019   18:30:15   ( -68.76,  81.73) 05/23/2019   18:30:13  ( -68.75,  81.70)    1.59                 2
 05/23/2019   19:20:55   (  68.42,-110.52) 05/23/2019   19:19:43  (  68.48,-110.99)   20.42                72
 05/26/2019   09:56:02   (  68.90,  30.11) 05/26/2019   09:57:11  (  68.89,  30.12)    0.84                69
 05/26/2019   10:46:43   ( -68.79,-162.43) 05/26/2019   10:46:41  ( -68.78,-162.38)    2.35                 2
 05/26/2019   11:37:23   (  68.46,   5.32) 05/26/2019   11:36:11  (  68.51,   4.92)   17.07                72
 05/29/2019   02:12:28   (  68.88, 146.01) 05/29/2019   02:13:38  (  68.91, 146.03)    3.49                70
 05/29/2019   03:03:09   ( -68.77, -46.52) 05/29/2019   03:03:09  ( -68.75, -46.54)    2.52                 0
 05/29/2019   03:53:50   (  68.50, 121.15) 05/29/2019   03:52:38  (  68.53, 120.82)   13.72                72
 05/31/2019   18:28:56   (  68.92, -98.16) 05/31/2019   18:30:06  (  68.93, -98.07)    3.53                70
 05/31/2019   19:19:36   ( -68.75,  69.39) 05/31/2019   19:19:37  ( -68.77,  69.36)    2.40                 1
 05/31/2019   20:10:18   (  68.54,-123.02) 05/31/2019   20:09:05  (  68.60,-123.21)   10.33                73
 06/03/2019   10:45:23   (  68.91,  17.74) 06/03/2019   10:46:35  (  68.88,  17.75)    2.67                72
 06/03/2019   11:36:04   ( -68.78,-174.77) 06/03/2019   11:36:05  ( -68.78,-174.74)    1.25                 1
 06/03/2019   12:26:46   (  68.57,  -7.18) 06/03/2019   12:25:33  (  68.61,  -7.31)    6.28                73
 06/06/2019   03:01:51   (  68.95, 133.57) 06/06/2019   03:03:02  (  68.94, 133.71)    5.56                71