Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 4 12.  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)
 04/12/2020   19:19:05   ( -70.52,  67.04) 04/12/2020   19:19:32  ( -70.52,  66.96)    2.83                27
 04/12/2020   20:09:49   (  70.44,-125.52) 04/12/2020   20:08:59  (  70.42,-125.55)    2.86                50
 04/15/2020   11:35:30   ( -70.57,-177.13) 04/15/2020   11:36:00  ( -70.54,-177.13)    2.87                30
 04/15/2020   12:26:13   (  70.43,  -9.60) 04/15/2020   12:25:27  (  70.43,  -9.65)    1.69                46
 04/18/2020   03:51:54   ( -70.56, -61.22) 04/18/2020   03:52:28  ( -70.57, -61.22)    0.69                34
 04/18/2020   04:42:38   (  70.48, 106.23) 04/18/2020   04:41:55  (  70.46, 106.26)    2.65                43
 04/20/2020   20:08:18   ( -70.56,  54.69) 04/20/2020   20:08:57  ( -70.55,  54.62)    2.98                39
 04/20/2020   20:59:02   (  70.47,-137.86) 04/20/2020   20:58:23  (  70.49,-137.82)    1.90                39
 04/23/2020   12:24:42   ( -70.61, 170.52) 04/23/2020   12:25:24  ( -70.58, 170.55)    3.22                42
 04/23/2020   13:15:25   (  70.47, -21.94) 04/23/2020   13:14:51  (  70.47, -21.98)    1.40                34