Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 4 24.  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)
 04/26/2020   04:41:05   ( -70.58, -73.52) 04/26/2020   04:41:49  ( -70.58, -73.56)    1.45                44
 04/26/2020   05:31:49   (  70.48,  93.95) 04/26/2020   05:31:16  (  70.47,  93.92)    1.46                33
 04/28/2020   20:57:30   ( -70.63,  42.30) 04/28/2020   20:58:16  ( -70.62,  42.37)    3.03                46
 04/28/2020   21:48:13   (  70.48,-150.14) 04/28/2020   21:47:43  (  70.51,-150.15)    3.26                30
 05/01/2020   13:13:54   ( -70.63, 158.20) 05/01/2020   13:14:44  ( -70.61, 158.23)    3.24                50
 05/01/2020   14:04:37   (  70.48, -34.24) 05/01/2020   14:04:11  (  70.49, -34.30)    2.60                26
 05/01/2020   14:55:02   ( -69.52, 134.54) 05/01/2020   14:53:56  ( -69.57, 132.03)   97.51                66
 05/04/2020   05:30:17   ( -70.63, -85.89) 05/04/2020   05:31:10  ( -70.64, -85.85)    1.65                53
 05/04/2020   06:21:01   (  70.53,  81.58) 05/04/2020   06:20:37  (  70.52,  81.62)    2.08                24
 05/04/2020   07:11:28   ( -69.68,-109.79) 05/04/2020   07:10:20  ( -69.71,-111.90)   81.37                68
 05/06/2020   21:46:41   ( -70.64,  30.01) 05/06/2020   21:47:38  ( -70.61,  29.99)    2.59                57
 05/06/2020   22:37:25   (  70.53,-162.51) 05/06/2020   22:37:04  (  70.55,-162.46)    2.39                21