Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 7 6.  Predictions up to the next  14.0 days:

     Date     Time(FY3D) FY3D Lat/Lon Date Time(LANDSAT-8) LANDSAT-8 Lat/Lon    Distance(km)  Time Diff(sec)
 07/07/2020   13:45:03   ( -70.59, 150.67) 07/07/2020   13:45:59  ( -70.57, 150.59)    3.17                56
 07/07/2020   14:35:46   (  70.46, -41.83) 07/07/2020   14:35:26  (  70.47, -41.91)    3.26                20
 07/07/2020   15:26:15   ( -69.69, 126.68) 07/07/2020   15:25:07  ( -69.76, 124.70)   76.81                68
 07/10/2020   06:01:27   ( -70.62, -93.48) 07/10/2020   06:02:28  ( -70.64, -93.43)    2.71                61
 07/10/2020   06:52:10   (  70.50,  74.02) 07/10/2020   06:51:56  (  70.48,  73.98)    2.85                14
 07/10/2020   07:42:43   ( -69.93,-117.77) 07/10/2020   07:41:33  ( -69.99,-119.10)   50.94                70
 07/12/2020   22:17:51   ( -70.65,  22.38) 07/12/2020   22:18:58  ( -70.65,  22.46)    3.06                67
 07/12/2020   23:08:34   (  70.54,-170.13) 07/12/2020   23:08:25  (  70.54,-170.05)    2.90                 9
 07/12/2020   23:59:11   ( -70.18,  -2.24) 07/12/2020   23:57:59  ( -70.22,  -2.90)   25.23                72
 07/15/2020   14:34:16   ( -70.74, 138.15) 07/15/2020   14:35:27  ( -70.71, 138.43)   10.93                71
 07/15/2020   15:24:57   (  70.53, -54.19) 07/15/2020   15:24:55  (  70.54, -54.17)    2.11                 2
 07/15/2020   16:15:39   ( -70.42, 113.29) 07/15/2020   16:14:25  ( -70.44, 113.31)    2.07                74
 07/18/2020   06:50:42   ( -70.93,-106.25) 07/18/2020   06:51:54  ( -70.82,-105.52)   29.57                72
 07/18/2020   07:41:20   (  70.56,  61.66) 07/18/2020   07:41:24  (  70.54,  61.71)    3.17                 4
 07/18/2020   08:32:02   ( -70.46,-130.85) 07/18/2020   08:30:54  ( -70.44,-130.81)    2.33                68