Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 4 17.  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   03:51:53   ( -70.54, -61.18) 04/18/2020   03:52:27  ( -70.54, -61.25)    2.74                34
 04/18/2020   04:42:37   (  70.45, 106.28) 04/18/2020   04:41:54  (  70.43, 106.23)    2.29                43
 04/20/2020   20:08:18   ( -70.59,  54.64) 04/20/2020   20:08:54  ( -70.59,  54.70)    1.98                36
 04/20/2020   20:59:02   (  70.50,-137.90) 04/20/2020   20:58:21  (  70.48,-137.82)    3.44                41
 04/23/2020   12:24:42   ( -70.59, 170.55) 04/23/2020   12:25:22  ( -70.58, 170.56)    1.38                40
 04/23/2020   13:15:25   (  70.45, -21.91) 04/23/2020   13:14:49  (  70.47, -21.97)    3.09                36
 04/26/2020   04:41:05   ( -70.60, -73.55) 04/26/2020   04:41:49  ( -70.57, -73.58)    3.40                44
 04/26/2020   05:31:49   (  70.50,  93.91) 04/26/2020   05:31:15  (  70.51,  93.97)    2.12                34
 04/28/2020   20:57:29   ( -70.60,  42.35) 04/28/2020   20:58:16  ( -70.61,  42.35)    0.33                47
 04/28/2020   21:48:13   (  70.51,-150.19) 04/28/2020   21:47:43  (  70.48,-150.18)    2.52                30