Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2019 5 4.  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)
 05/04/2019   23:44:24   (  68.88,-176.92) 05/04/2019   23:45:23  (  68.87,-176.94)    1.44                59
 05/05/2019   00:35:04   ( -68.73,  -9.40) 05/05/2019   00:34:53  ( -68.75,  -9.46)    2.94                11
 05/05/2019   01:25:39   (  68.12, 158.70) 05/05/2019   01:24:29  (  68.15, 157.45)   51.88                70
 05/07/2019   16:00:51   (  68.85, -61.00) 05/07/2019   16:01:52  (  68.87, -61.07)    3.08                61
 05/07/2019   16:51:32   ( -68.76, 106.45) 05/07/2019   16:51:22  ( -68.75, 106.42)    1.28                10
 05/07/2019   17:42:07   (  68.14, -85.45) 05/07/2019   17:40:57  (  68.20, -86.60)   48.16                70
 05/10/2019   08:17:18   (  68.88,  54.84) 05/10/2019   08:18:20  (  68.86,  54.80)    2.96                62
 05/10/2019   09:07:59   ( -68.78,-137.71) 05/10/2019   09:07:49  ( -68.80,-137.64)    3.47                10
 05/10/2019   09:58:35   (  68.23,  30.33) 05/10/2019   09:57:24  (  68.25,  29.33)   41.15                71
 05/13/2019   00:33:46   (  68.91, 170.68) 05/13/2019   00:34:48  (  68.89, 170.73)    2.66                62
 05/13/2019   01:24:26   ( -68.75, -21.79) 05/13/2019   01:24:19  ( -68.73, -21.84)    3.47                 7
 05/13/2019   02:15:03   (  68.26, 146.17) 05/13/2019   02:13:52  (  68.28, 145.26)   37.75                71
 05/15/2019   16:50:13   (  68.89, -73.41) 05/15/2019   16:51:17  (  68.87, -73.43)    2.61                64
 05/15/2019   17:40:54   ( -68.78,  94.05) 05/15/2019   17:40:47  ( -68.76,  94.08)    2.50                 7
 05/15/2019   18:31:31   (  68.29, -97.99) 05/15/2019   18:30:20  (  68.31, -98.83)   34.56                71