Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 4 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)
 04/28/2020   20:57:29   ( -70.59,  42.37) 04/28/2020   20:58:16  ( -70.62,  42.37)    3.61                47
 04/28/2020   21:48:13   (  70.48,-150.15) 04/28/2020   21:47:43  (  70.51,-150.15)    2.94                30
 05/01/2020   13:13:52   ( -70.59, 158.27) 05/01/2020   13:14:43  ( -70.60, 158.22)    2.30                51
 05/01/2020   14:04:36   (  70.49, -34.25) 05/01/2020   14:04:10  (  70.49, -34.31)    2.18                26
 05/01/2020   14:55:01   ( -69.53, 134.52) 05/01/2020   14:53:55  ( -69.56, 132.02)   97.21                66
 05/04/2020   05:30:17   ( -70.65, -85.91) 05/04/2020   05:31:10  ( -70.63, -85.86)    2.95                53
 05/04/2020   06:21:00   (  70.49,  81.65) 05/04/2020   06:20:37  (  70.51,  81.61)    2.66                23
 05/04/2020   07:11:27   ( -69.65,-109.73) 05/04/2020   07:10:20  ( -69.70,-111.91)   84.26                67
 05/06/2020   21:46:41   ( -70.66,  29.98) 05/06/2020   21:47:37  ( -70.66,  30.06)    2.81                56
 05/06/2020   22:37:25   (  70.55,-162.54) 05/06/2020   22:37:04  (  70.54,-162.47)    3.01                21
 05/06/2020   23:27:54   ( -69.81,   5.93) 05/06/2020   23:26:45  ( -69.84,   4.16)   68.00                69
 05/09/2020   14:03:04   ( -70.61, 145.96) 05/09/2020   14:04:05  ( -70.62, 145.89)    2.90                61
 05/09/2020   14:53:48   (  70.51, -46.56) 05/09/2020   14:53:32  (  70.50, -46.64)    3.13                16