Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 4 18.  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)
 04/20/2020   20:08:17   ( -70.56,  54.70) 04/20/2020   20:08:54  ( -70.57,  54.66)    1.77                37
 04/20/2020   20:59:01   (  70.46,-137.84) 04/20/2020   20:58:21  (  70.46,-137.85)    0.58                40
 04/23/2020   12:24:41   ( -70.56, 170.60) 04/23/2020   12:25:22  ( -70.56, 170.53)    2.77                41
 04/23/2020   13:15:25   (  70.46, -21.93) 04/23/2020   13:14:49  (  70.45, -21.99)    2.69                36
 04/26/2020   04:41:06   ( -70.61, -73.58) 04/26/2020   04:41:49  ( -70.61, -73.53)    1.90                43
 04/26/2020   05:31:49   (  70.46,  93.97) 04/26/2020   05:31:16  (  70.49,  93.94)    3.06                33
 04/28/2020   20:57:30   ( -70.62,  42.33) 04/28/2020   20:58:17  ( -70.59,  42.33)    2.61                47
 04/28/2020   21:48:12   (  70.47,-150.12) 04/28/2020   21:47:43  (  70.47,-150.20)    3.04                29
 05/01/2020   13:13:53   ( -70.62, 158.23) 05/01/2020   13:14:43  ( -70.63, 158.26)    1.52                50
 05/01/2020   14:04:37   (  70.52, -34.31) 05/01/2020   14:04:10  (  70.51, -34.28)    2.20                27