Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2019 5 26.  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   ( -71.50, -85.71) 05/27/2019   05:25:00  ( -71.37, -83.02)   96.26                66
 05/27/2019   06:14:21   (  70.51,  83.28) 05/27/2019   06:14:41  (  70.50,  83.27)    0.45                20
 05/27/2019   07:05:02   ( -70.40,-109.23) 05/27/2019   07:04:11  ( -70.40,-109.25)    0.78                51
 05/29/2019   22:30:48   (  70.49,-160.81) 05/29/2019   22:31:12  (  70.47,-160.89)    3.58                24
 05/29/2019   23:21:30   ( -70.43,   6.60) 05/29/2019   23:20:41  ( -70.43,   6.67)    2.71                49
 06/01/2019   14:47:15   (  70.48, -44.91) 06/01/2019   14:47:42  (  70.50, -44.98)    3.38                27
 06/01/2019   15:37:57   ( -70.41, 122.51) 06/01/2019   15:37:12  ( -70.39, 122.50)    2.08                45
 06/04/2019   07:03:43   (  70.52,  70.91) 06/04/2019   07:04:12  (  70.51,  70.92)    0.64                29
 06/04/2019   07:54:24   ( -70.39,-121.57) 06/04/2019   07:53:42  ( -70.41,-121.59)    2.41                42
 06/06/2019   23:20:09   (  70.51,-173.19) 06/06/2019   23:20:41  (  70.53,-173.17)    2.58                32
 06/07/2019   00:10:51   ( -70.43,  -5.74) 06/07/2019   00:10:11  ( -70.43,  -5.69)    2.20                40