Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 4 16.  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)
 04/18/2020   03:51:54   ( -70.58, -61.24) 04/18/2020   03:52:27  ( -70.56, -61.23)    2.17                33
 04/18/2020   04:42:37   (  70.43, 106.30) 04/18/2020   04:41:54  (  70.45, 106.26)    2.42                43
 04/20/2020   20:08:18   ( -70.58,  54.67) 04/20/2020   20:08:55  ( -70.55,  54.64)    3.01                37
 04/20/2020   20:59:02   (  70.49,-137.88) 04/20/2020   20:58:21  (  70.50,-137.80)    2.99                41
 04/23/2020   12:24:41   ( -70.58, 170.57) 04/23/2020   12:25:21  ( -70.60, 170.58)    1.83                40
 04/23/2020   13:15:25   (  70.49, -21.97) 04/23/2020   13:14:48  (  70.48, -21.94)    1.50                37
 04/26/2020   04:41:05   ( -70.59, -73.54) 04/26/2020   04:41:49  ( -70.58, -73.56)    0.99                44
 04/26/2020   05:31:49   (  70.50,  93.92) 04/26/2020   05:31:16  (  70.47,  93.91)    3.43                33
 04/28/2020   20:57:29   ( -70.60,  42.36) 04/28/2020   20:58:16  ( -70.62,  42.37)    2.62                47
 04/28/2020   21:48:13   (  70.50,-150.18) 04/28/2020   21:47:43  (  70.50,-150.16)    0.86                30