Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2019 5 25.  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)
 05/27/2019   05:23:54   ( -71.48, -85.66) 05/27/2019   05:25:00  ( -71.40, -82.98)   95.52                66
 05/27/2019   06:14:22   (  70.53,  83.24) 05/27/2019   06:14:41  (  70.53,  83.31)    2.92                19
 05/27/2019   07:05:03   ( -70.43,-109.27) 05/27/2019   07:04:11  ( -70.43,-109.21)    2.50                52
 05/29/2019   22:30:49   (  70.52,-160.86) 05/29/2019   22:31:12  (  70.50,-160.85)    2.47                23
 05/29/2019   23:21:30   ( -70.41,   6.64) 05/29/2019   23:20:42  ( -70.40,   6.63)    1.18                48
 06/01/2019   14:47:15   (  70.51, -44.96) 06/01/2019   14:47:41  (  70.52, -44.94)    1.28                26
 06/01/2019   15:37:56   ( -70.39, 122.55) 06/01/2019   15:37:11  ( -70.42, 122.54)    3.40                45
 06/04/2019   07:03:42   (  70.50,  70.94) 06/04/2019   07:04:12  (  70.48,  70.88)    2.96                30
 06/04/2019   07:54:24   ( -70.43,-121.62) 06/04/2019   07:53:41  ( -70.44,-121.55)    3.11                43
 06/06/2019   23:20:09   (  70.49,-173.16) 06/06/2019   23:20:42  (  70.50,-173.22)    2.21                33
 06/07/2019   00:10:51   ( -70.41,  -5.72) 06/07/2019   00:10:12  ( -70.40,  -5.73)    1.43                39