Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 4 15.  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)
 04/15/2020   11:35:30   ( -70.57,-177.14) 04/15/2020   11:35:59  ( -70.57,-177.09)    1.67                29
 04/15/2020   12:26:13   (  70.43,  -9.60) 04/15/2020   12:25:26  (  70.46,  -9.60)    3.47                47
 04/18/2020   03:51:54   ( -70.57, -61.23) 04/18/2020   03:52:27  ( -70.57, -61.22)    0.45                33
 04/18/2020   04:42:38   (  70.48, 106.23) 04/18/2020   04:41:54  (  70.46, 106.26)    3.03                44
 04/20/2020   20:08:18   ( -70.57,  54.68) 04/20/2020   20:08:55  ( -70.56,  54.65)    1.57                37
 04/20/2020   20:59:01   (  70.48,-137.86) 04/20/2020   20:58:20  (  70.50,-137.79)    3.53                41
 04/23/2020   12:24:41   ( -70.57, 170.59) 04/23/2020   12:25:21  ( -70.60, 170.59)    3.61                40
 04/23/2020   13:15:25   (  70.48, -21.96) 04/23/2020   13:14:48  (  70.49, -21.94)    1.06                37
 04/26/2020   04:41:05   ( -70.58, -73.51) 04/26/2020   04:41:49  ( -70.59, -73.55)    2.07                44
 04/26/2020   05:31:49   (  70.48,  93.94) 04/26/2020   05:31:16  (  70.47,  93.91)    2.01                33
 04/28/2020   20:57:30   ( -70.63,  42.30) 04/28/2020   20:58:16  ( -70.62,  42.38)    3.06                46
 04/28/2020   21:48:13   (  70.49,-150.16) 04/28/2020   21:47:43  (  70.50,-150.16)    1.39                30