Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 4 28.  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   ( -70.62,  42.31) 04/28/2020   20:58:15  ( -70.63,  42.39)    2.79                46
 04/28/2020   21:48:13   (  70.52,-150.21) 04/28/2020   21:47:42  (  70.52,-150.13)    2.97                31
 05/01/2020   13:13:53   ( -70.63, 158.22) 05/01/2020   13:14:43  ( -70.61, 158.23)    1.94                50
 05/01/2020   14:04:37   (  70.52, -34.30) 05/01/2020   14:04:10  (  70.50, -34.29)    2.39                27
 05/01/2020   14:55:01   ( -69.52, 134.55) 05/01/2020   14:53:55  ( -69.57, 132.04)   97.71                66
 05/04/2020   05:30:17   ( -70.63, -85.88) 05/04/2020   05:31:10  ( -70.64, -85.84)    1.80                53
 05/04/2020   06:21:01   (  70.52,  81.60) 05/04/2020   06:20:37  (  70.53,  81.63)    1.29                24
 05/04/2020   07:11:28   ( -69.68,-109.78) 05/04/2020   07:10:20  ( -69.71,-111.89)   81.55                68
 05/06/2020   21:46:41   ( -70.64,  30.02) 05/06/2020   21:47:38  ( -70.61,  29.99)    2.75                57
 05/06/2020   22:37:25   (  70.53,-162.50) 05/06/2020   22:37:04  (  70.55,-162.45)    2.91                21
 05/06/2020   23:27:54   ( -69.79,   5.96) 05/06/2020   23:26:45  ( -69.85,   4.17)   68.98                69
 05/09/2020   14:03:04   ( -70.64, 145.92) 05/09/2020   14:04:04  ( -70.63, 145.90)    0.91                60
 05/09/2020   14:53:48   (  70.54, -46.60) 05/09/2020   14:53:31  (  70.51, -46.63)    2.42                17