Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2019 12 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)
 12/24/2019   01:16:07   (  69.66, 158.90) 12/24/2019   01:17:14  (  69.56, 160.85)   76.16                67
 12/24/2019   02:06:33   ( -68.75, -32.51) 12/24/2019   02:06:56  ( -68.78, -32.54)    3.04                23
 12/24/2019   02:57:17   (  68.64, 134.95) 12/24/2019   02:56:24  (  68.62, 134.91)    2.46                53
 12/26/2019   17:32:34   (  69.75, -85.34) 12/26/2019   17:33:41  (  69.67, -83.13)   85.94                67
 12/26/2019   18:22:59   ( -68.80,  83.33) 12/26/2019   18:23:25  ( -68.78,  83.34)    2.30                26
 12/26/2019   19:13:43   (  68.68,-109.21) 12/26/2019   19:12:52  (  68.67,-109.14)    2.70                51
 12/29/2019   10:39:23   ( -68.79,-160.76) 12/29/2019   10:39:53  ( -68.77,-160.79)    2.23                30
 12/29/2019   11:30:07   (  68.67,   6.70) 12/29/2019   11:29:20  (  68.67,   6.73)    1.38                47
 01/01/2020   02:55:48   ( -68.78, -44.86) 01/01/2020   02:56:22  ( -68.76, -44.92)    3.33                34
 01/01/2020   03:46:32   (  68.67, 122.61) 01/01/2020   03:45:49  (  68.65, 122.59)    1.62                43
 01/03/2020   19:12:13   ( -68.78,  71.04) 01/03/2020   19:12:50  ( -68.81,  71.02)    2.95                37
 01/03/2020   20:02:57   (  68.67,-121.49) 01/03/2020   20:02:17  (  68.70,-121.47)    3.42                40