Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2020 10 21.  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)
 10/21/2020   22:54:10   (  69.47,-164.66) 10/21/2020   22:55:21  (  69.39,-163.86)   32.72                71
 10/21/2020   23:44:45   ( -69.04,   3.27) 10/21/2020   23:44:55  ( -69.05,   3.34)    3.05                10
 10/22/2020   00:35:28   (  68.89, 170.80) 10/22/2020   00:34:23  (  68.89, 170.77)    0.96                65
 10/24/2020   15:10:36   (  69.68, -49.04) 10/24/2020   15:11:46  (  69.57, -47.74)   51.73                70
 10/24/2020   16:01:07   ( -69.02, 119.22) 10/24/2020   16:01:24  ( -69.02, 119.17)    1.90                17
 10/24/2020   16:51:51   (  68.93, -73.35) 10/24/2020   16:50:51  (  68.90, -73.33)    2.96                60
 10/27/2020   07:27:01   (  69.88,  66.58) 10/27/2020   07:28:09  (  69.79,  68.45)   72.53                68
 10/27/2020   08:17:29   ( -69.06,-124.92) 10/27/2020   08:17:50  ( -69.08,-124.86)    3.46                21
 10/27/2020   09:08:12   (  68.92,  42.59) 10/27/2020   09:07:18  (  68.91,  42.56)    1.28                54
 10/29/2020   23:43:27   (  70.08,-177.81) 10/29/2020   23:44:33  (  70.02,-175.35)   93.70                66
 10/30/2020   00:33:51   ( -69.05,  -8.98) 10/30/2020   00:34:19  ( -69.03,  -9.04)    2.74                28
 10/30/2020   01:24:34   (  68.91, 158.51) 10/30/2020   01:23:46  (  68.91, 158.45)    2.55                48
 11/01/2020   16:50:14   ( -69.09, 106.88) 11/01/2020   16:50:46  ( -69.09, 106.91)    1.36                32
 11/01/2020   17:40:57   (  68.96, -85.63) 11/01/2020   17:40:13  (  68.97, -85.60)    1.64                44