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)
 04/26/2020   04:41:05   ( -70.60, -73.55) 04/26/2020   04:41:48  ( -70.62, -73.51)    2.88                43
 04/26/2020   05:31:49   (  70.50,  93.92) 04/26/2020   05:31:15  (  70.51,  93.98)    2.80                34
 04/28/2020   20:57:29   ( -70.60,  42.35) 04/28/2020   20:58:16  ( -70.60,  42.35)    0.26                47
 04/28/2020   21:48:13   (  70.50,-150.18) 04/28/2020   21:47:43  (  70.49,-150.17)    0.60                30
 05/01/2020   13:13:53   ( -70.61, 158.25) 05/01/2020   13:14:44  ( -70.59, 158.20)    3.06                51
 05/01/2020   14:04:37   (  70.50, -34.28) 05/01/2020   14:04:10  (  70.53, -34.25)    2.72                27
 05/01/2020   14:55:02   ( -69.55, 134.50) 05/01/2020   14:53:55  ( -69.60, 132.08)   94.07                67
 05/04/2020   05:30:17   ( -70.61, -85.86) 05/04/2020   05:31:11  ( -70.62, -85.88)    0.84                54
 05/04/2020   06:21:01   (  70.51,  81.62) 05/04/2020   06:20:38  (  70.50,  81.59)    1.48                23
 05/04/2020   07:11:28   ( -69.66,-109.76) 05/04/2020   07:10:20  ( -69.74,-111.85)   81.13                68
 05/06/2020   21:46:40   ( -70.62,  30.04) 05/06/2020   21:47:37  ( -70.65,  30.04)    2.57                57
 05/06/2020   22:37:24   (  70.52,-162.49) 05/06/2020   22:37:04  (  70.53,-162.49)    0.78                20
 05/06/2020   23:27:53   ( -69.78,   5.98) 05/06/2020   23:26:45  ( -69.83,   4.14)   70.70                68
 05/09/2020   14:03:04   ( -70.63, 145.93) 05/09/2020   14:04:05  ( -70.62, 145.88)    2.68                61
 05/09/2020   14:53:48   (  70.53, -46.60) 05/09/2020   14:53:31  (  70.55, -46.58)    2.26                17