Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 4 10.  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   19:19:06   ( -70.55,  66.99) 04/12/2020   19:19:33  ( -70.53,  66.97)    2.54                27
 04/12/2020   20:09:49   (  70.42,-125.49) 04/12/2020   20:09:00  (  70.42,-125.54)    2.10                49
 04/15/2020   11:35:30   ( -70.55,-177.10) 04/15/2020   11:36:02  ( -70.54,-177.15)    2.25                32
 04/15/2020   12:26:14   (  70.47,  -9.66) 04/15/2020   12:25:28  (  70.48,  -9.58)    3.10                46
 04/18/2020   03:51:53   ( -70.55, -61.19) 04/18/2020   03:52:30  ( -70.56, -61.24)    2.23                37
 04/18/2020   04:42:37   (  70.47, 106.25) 04/18/2020   04:41:57  (  70.45, 106.23)    2.34                40
 04/20/2020   20:08:18   ( -70.60,  54.63) 04/20/2020   20:08:59  ( -70.60,  54.68)    2.08                41
 04/20/2020   20:59:01   (  70.47,-137.84) 04/20/2020   20:58:26  (  70.48,-137.84)    1.78                35
 04/23/2020   12:24:42   ( -70.60, 170.53) 04/23/2020   12:25:29  ( -70.60, 170.55)    1.07                47
 04/23/2020   13:15:25   (  70.47, -21.94) 04/23/2020   13:14:56  (  70.48, -21.98)    2.06                29