Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2019 12 25.  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)
 12/26/2019   17:32:34   (  69.76, -85.35) 12/26/2019   17:33:41  (  69.66, -83.14)   86.02                67
 12/26/2019   18:22:58   ( -68.75,  83.39) 12/26/2019   18:23:25  ( -68.76,  83.32)    3.06                27
 12/26/2019   19:13:42   (  68.63,-109.14) 12/26/2019   19:12:52  (  68.66,-109.16)    3.23                50
 12/29/2019   10:39:24   ( -68.79,-160.77) 12/29/2019   10:39:53  ( -68.81,-160.73)    2.47                29
 12/29/2019   11:30:08   (  68.68,   6.70) 12/29/2019   11:29:21  (  68.65,   6.71)    2.71                47
 01/01/2020   02:55:48   ( -68.79, -44.86) 01/01/2020   02:56:21  ( -68.80, -44.87)    1.79                33
 01/01/2020   03:46:32   (  68.67, 122.60) 01/01/2020   03:45:49  (  68.64, 122.58)    3.31                43
 01/03/2020   19:12:13   ( -68.78,  71.05) 01/03/2020   19:12:50  ( -68.79,  71.00)    2.12                37
 01/03/2020   20:02:57   (  68.66,-121.49) 01/03/2020   20:02:17  (  68.68,-121.49)    1.91                40
 01/06/2020   11:28:39   ( -68.83,-173.12) 01/06/2020   11:29:18  ( -68.83,-173.07)    1.96                39
 01/06/2020   12:19:22   (  68.66,  -5.58) 01/06/2020   12:18:46  (  68.66,  -5.64)    2.14                36