Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 1 1.  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)
 01/01/2020   23:14:09   ( -70.46,   8.23) 01/01/2020   23:15:00  ( -70.47,   8.25)    1.29                51
 01/02/2020   00:04:53   (  70.34, 175.72) 01/02/2020   00:04:27  (  70.36, 175.75)    2.33                26
 01/02/2020   00:55:18   ( -69.40, -15.54) 01/02/2020   00:54:11  ( -69.49, -17.85)   90.83                67
 01/04/2020   15:30:34   ( -70.45, 124.14) 01/04/2020   15:31:28  ( -70.48, 124.15)    2.51                54
 01/04/2020   16:21:18   (  70.34, -68.37) 01/04/2020   16:20:55  (  70.37, -68.37)    3.31                23
 01/04/2020   17:11:44   ( -69.50, 100.22) 01/04/2020   17:10:37  ( -69.55,  98.11)   82.09                67
 01/07/2020   07:46:58   ( -70.45,-119.95) 01/07/2020   07:47:55  ( -70.48,-119.97)    3.41                57
 01/07/2020   08:37:43   (  70.39,  47.46) 01/07/2020   08:37:22  (  70.37,  47.51)    2.94                21
 01/07/2020   09:28:11   ( -69.60,-144.03) 01/07/2020   09:27:03  ( -69.66,-145.85)   70.98                68
 01/10/2020   00:03:24   ( -70.50,  -4.13) 01/10/2020   00:04:23  ( -70.47,  -4.09)    2.70                59
 01/10/2020   00:54:08   (  70.38, 163.36) 01/10/2020   00:53:50  (  70.36, 163.39)    2.58                18
 01/10/2020   01:44:38   ( -69.70, -28.28) 01/10/2020   01:43:29  ( -69.77, -29.82)   60.04                69
 01/12/2020   16:19:49   ( -70.49, 111.78) 01/12/2020   16:20:51  ( -70.47, 111.78)    2.93                62
 01/12/2020   17:10:33   (  70.38, -80.74) 01/12/2020   17:10:18  (  70.35, -80.75)    3.40                15
 01/12/2020   18:01:05   ( -69.80,  87.47) 01/12/2020   17:59:55  ( -69.87,  86.20)   49.22                70