Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 1 14.  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)
 01/15/2020   08:36:13   ( -70.48,-132.30) 01/15/2020   08:37:21  ( -70.50,-132.32)    1.73                68
 01/15/2020   09:26:58   (  70.41,  35.12) 01/15/2020   09:26:48  (  70.39,  35.17)    3.06                10
 01/15/2020   10:17:34   ( -70.05,-157.01) 01/15/2020   10:16:21  ( -70.12,-157.59)   22.94                73
 01/18/2020   00:52:38   ( -70.48, -16.40) 01/18/2020   00:53:50  ( -70.47, -16.48)    2.99                72
 01/18/2020   01:43:23   (  70.41, 151.02) 01/18/2020   01:43:16  (  70.42, 151.09)    2.88                 7
 01/18/2020   02:34:01   ( -70.15, -41.27) 01/18/2020   02:32:48  ( -70.20, -41.59)   13.20                73
 01/20/2020   17:09:05   ( -70.58,  99.34) 01/20/2020   17:10:17  ( -70.55,  99.52)    7.32                72
 01/20/2020   17:59:48   (  70.41, -93.08) 01/20/2020   17:59:45  (  70.38, -93.08)    2.68                 3
 01/20/2020   18:50:28   ( -70.26,  74.48) 01/20/2020   18:49:15  ( -70.28,  74.40)    3.78                73
 01/23/2020   09:25:31   ( -70.68,-144.92) 01/23/2020   09:26:43  ( -70.62,-144.49)   17.07                72
 01/23/2020   10:16:12   (  70.41,  22.82) 01/23/2020   10:16:12  (  70.40,  22.83)    0.74                 0
 01/23/2020   11:06:53   ( -70.30,-169.70) 01/23/2020   11:05:42  ( -70.30,-169.69)    0.69                71
 01/26/2020   01:41:59   ( -70.83, -29.27) 01/26/2020   01:43:10  ( -70.69, -28.50)   32.04                71
 01/26/2020   02:32:37   (  70.41, 138.72) 01/26/2020   02:32:40  (  70.41, 138.73)    0.99                 3
 01/26/2020   03:23:18   ( -70.30, -53.79) 01/26/2020   03:22:10  ( -70.31, -53.78)    1.71                68