Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 4 13.  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   ( -70.55,-177.10) 04/15/2020   11:36:00  ( -70.54,-177.14)    1.77                30
 04/15/2020   12:26:14   (  70.46,  -9.65) 04/15/2020   12:25:27  (  70.43,  -9.65)    3.49                47
 04/18/2020   03:51:53   ( -70.54, -61.18) 04/18/2020   03:52:27  ( -70.54, -61.25)    2.87                34
 04/18/2020   04:42:37   (  70.45, 106.27) 04/18/2020   04:41:54  (  70.43, 106.23)    3.01                43
 04/20/2020   20:08:18   ( -70.58,  54.66) 04/20/2020   20:08:54  ( -70.60,  54.71)    2.55                36
 04/20/2020   20:59:02   (  70.50,-137.89) 04/20/2020   20:58:21  (  70.48,-137.82)    3.07                41
 04/23/2020   12:24:42   ( -70.58, 170.57) 04/23/2020   12:25:22  ( -70.60, 170.58)    2.51                40
 04/23/2020   13:15:26   (  70.49, -21.97) 04/23/2020   13:14:49  (  70.48, -21.95)    1.32                37
 04/26/2020   04:41:06   ( -70.57, -73.51) 04/26/2020   04:41:50  ( -70.60, -73.54)    3.20                44
 04/26/2020   05:31:50   (  70.48,  93.95) 04/26/2020   05:31:17  (  70.47,  93.92)    1.05                33