Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2019 5 19.  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)
 05/21/2019   01:23:07   (  68.89, 158.35) 05/21/2019   01:24:14  (  68.89, 158.35)    0.70                67
 05/21/2019   02:13:48   ( -68.80, -34.20) 05/21/2019   02:13:44  ( -68.78, -34.16)    2.88                 4
 05/21/2019   03:04:27   (  68.40, 133.63) 05/21/2019   03:03:15  (  68.44, 133.08)   22.94                72
 05/23/2019   17:39:34   (  68.88, -85.75) 05/23/2019   17:40:43  (  68.86, -85.80)    2.94                69
 05/23/2019   18:30:15   ( -68.78,  81.71) 05/23/2019   18:30:13  ( -68.75,  81.70)    2.82                 2
 05/23/2019   19:20:55   (  68.44,-110.54) 05/23/2019   19:19:43  (  68.47,-111.00)   19.14                72
 05/26/2019   09:56:01   (  68.87,  30.14) 05/26/2019   09:57:11  (  68.89,  30.11)    2.08                70
 05/26/2019   10:46:42   ( -68.76,-162.39) 05/26/2019   10:46:41  ( -68.78,-162.39)    1.96                 1
 05/26/2019   11:37:23   (  68.49,   5.28) 05/26/2019   11:36:10  (  68.55,   4.98)   14.59                73
 05/29/2019   02:12:28   (  68.92, 145.96) 05/29/2019   02:13:38  (  68.90, 146.02)    2.64                70
 05/29/2019   03:03:08   ( -68.75, -46.49) 05/29/2019   03:03:09  ( -68.75, -46.55)    2.31                 1
 05/29/2019   03:53:50   (  68.53, 121.10) 05/29/2019   03:52:37  (  68.57, 120.88)   10.05                73
 05/31/2019   18:28:55   (  68.92, -98.15) 05/31/2019   18:30:06  (  68.92, -98.08)    2.62                71
 05/31/2019   19:19:35   ( -68.74,  69.40) 05/31/2019   19:19:37  ( -68.76,  69.35)    3.14                 2
 05/31/2019   20:10:18   (  68.59,-123.08) 05/31/2019   20:09:05  (  68.59,-123.22)    5.72                73