Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 1 4.  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)
 01/04/2020   15:30:34   ( -70.48, 124.10) 01/04/2020   15:31:28  ( -70.46, 124.12)    2.39                54
 01/04/2020   16:21:18   (  70.36, -68.40) 01/04/2020   16:20:55  (  70.35, -68.39)    0.93                23
 01/04/2020   17:11:45   ( -69.53, 100.18) 01/04/2020   17:10:37  ( -69.58,  98.16)   78.75                68
 01/07/2020   07:46:59   ( -70.47,-119.99) 01/07/2020   07:47:56  ( -70.47,-119.98)    0.13                57
 01/07/2020   08:37:43   (  70.35,  47.51) 01/07/2020   08:37:23  (  70.36,  47.50)    1.14                20
 01/07/2020   09:28:12   ( -69.62,-144.06) 01/07/2020   09:27:03  ( -69.71,-145.79)   67.47                69
 01/10/2020   00:03:24   ( -70.46,  -4.08) 01/10/2020   00:04:24  ( -70.48,  -4.08)    2.28                60
 01/10/2020   00:54:07   (  70.35, 163.42) 01/10/2020   00:53:50  (  70.37, 163.40)    2.97                17
 01/10/2020   01:44:38   ( -69.72, -28.31) 01/10/2020   01:43:29  ( -69.77, -29.82)   58.47                69
 01/12/2020   16:19:49   ( -70.51, 111.75) 01/12/2020   16:20:51  ( -70.49, 111.81)    2.75                62
 01/12/2020   17:10:33   (  70.39, -80.76) 01/12/2020   17:10:18  (  70.38, -80.71)    2.30                15
 01/12/2020   18:01:06   ( -69.87,  87.37) 01/12/2020   17:59:55  ( -69.89,  86.23)   43.57                71
 01/15/2020   08:36:14   ( -70.50,-132.34) 01/15/2020   08:37:19  ( -70.50,-132.29)    1.67                65
 01/15/2020   09:26:58   (  70.39,  35.15) 01/15/2020   09:26:46  (  70.39,  35.18)    1.23                12
 01/15/2020   10:17:33   ( -69.97,-156.88) 01/15/2020   10:16:21  ( -70.01,-157.72)   32.30                72
 01/18/2020   00:52:39   ( -70.49, -16.43) 01/18/2020   00:53:47  ( -70.51, -16.40)    1.94                68
 01/18/2020   01:43:23   (  70.38, 151.05) 01/18/2020   01:43:14  (  70.39, 151.07)    1.14                 9
 01/18/2020   02:34:00   ( -70.07, -41.14) 01/18/2020   02:32:47  ( -70.13, -41.68)   21.52                73