Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2020 12 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)
 12/19/2020   22:35:27   (  69.22,-159.40) 12/19/2020   22:36:33  (  69.23,-159.44)    2.21                66
 12/19/2020   23:26:08   ( -69.10,   8.10) 12/19/2020   23:26:03  ( -69.12,   8.04)    3.37                 5
 12/20/2020   00:16:46   (  68.69, 175.97) 12/20/2020   00:15:35  (  68.74, 175.20)   31.47                71
 12/22/2020   14:51:50   (  69.31, -43.60) 12/22/2020   14:53:01  (  69.27, -43.51)    5.54                71
 12/22/2020   15:42:30   ( -69.13, 123.97) 12/22/2020   15:42:31  ( -69.16, 123.97)    3.13                 1
 12/22/2020   16:33:12   (  68.94, -68.45) 12/22/2020   16:32:00  (  68.94, -68.66)    8.54                72
 12/25/2020   07:08:14   (  69.51,  72.04) 12/25/2020   07:09:26  (  69.42,  72.56)   22.56                72
 12/25/2020   07:58:51   ( -69.17,-120.16) 12/25/2020   07:58:59  ( -69.15,-120.17)    3.22                 8
 12/25/2020   08:49:34   (  69.03,  47.35) 12/25/2020   08:48:26  (  69.03,  47.33)    0.79                68
 12/27/2020   23:24:40   (  69.76,-172.41) 12/27/2020   23:25:50  (  69.67,-171.23)   46.54                70
 12/28/2020   00:15:12   ( -69.16,  -4.22) 12/28/2020   00:15:27  ( -69.18,  -4.25)    2.18                15
 12/28/2020   01:05:56   (  69.07, 163.22) 12/28/2020   01:04:54  (  69.06, 163.25)    1.43                62
 12/30/2020   15:41:06   (  70.02, -56.86) 12/30/2020   15:42:14  (  69.91, -55.01)   71.36                68
 12/30/2020   16:31:34   ( -69.21, 111.65) 12/30/2020   16:31:55  ( -69.20, 111.66)    0.57                21
 12/30/2020   17:22:17   (  69.06, -80.84) 12/30/2020   17:21:22  (  69.09, -80.84)    3.09                55