Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2019 9 20.  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)
 09/21/2019   06:50:12   ( -68.85,-103.52) 09/21/2019   06:51:17  ( -68.86,-103.56)    1.37                65
 09/21/2019   07:40:56   (  68.72,  63.96) 09/21/2019   07:40:44  (  68.75,  63.95)    2.60                12
 09/21/2019   08:31:31   ( -68.31,-128.18) 09/21/2019   08:30:19  ( -68.36,-128.89)   29.64                72
 09/23/2019   23:06:39   ( -68.88,  12.32) 09/23/2019   23:07:46  ( -68.87,  12.33)    1.67                67
 09/23/2019   23:57:23   (  68.76, 179.80) 09/23/2019   23:57:13  (  68.76, 179.84)    1.59                10
 09/24/2019   00:47:59   ( -68.39, -12.40) 09/24/2019   00:46:46  ( -68.48, -12.86)   21.50                73
 09/26/2019   15:23:05   ( -68.86, 128.24) 09/26/2019   15:24:15  ( -68.87, 128.22)    1.97                70
 09/26/2019   16:13:49   (  68.74, -64.29) 09/26/2019   16:13:42  (  68.76, -64.28)    2.02                 7
 09/26/2019   17:04:27   ( -68.48, 103.38) 09/26/2019   17:03:14  ( -68.54, 103.09)   14.16                73
 09/29/2019   07:39:32   ( -68.89,-115.91) 09/29/2019   07:40:44  ( -68.87,-115.91)    1.76                72
 09/29/2019   08:30:16   (  68.78,  51.55) 09/29/2019   08:30:11  (  68.75,  51.59)    2.71                 5
 09/29/2019   09:20:55   ( -68.56,-140.84) 09/29/2019   09:19:42  ( -68.60,-140.97)    6.80                73
 10/01/2019   23:55:59   ( -68.97,  -0.13) 10/01/2019   23:57:11  ( -68.92,   0.03)    8.67                72
 10/02/2019   00:46:41   (  68.76, 167.47) 10/02/2019   00:46:39  (  68.75, 167.46)    1.36                 2
 10/02/2019   01:37:22   ( -68.65, -25.06) 10/02/2019   01:36:09  ( -68.65, -25.03)    1.40                73