Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 1 13.  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   08:36:14   ( -70.50,-132.34) 01/15/2020   08:37:22  ( -70.48,-132.34)    2.56                68
 01/15/2020   09:26:58   (  70.38,  35.16) 01/15/2020   09:26:49  (  70.38,  35.15)    0.82                 9
 01/15/2020   10:17:34   ( -70.03,-156.97) 01/15/2020   10:16:22  ( -70.10,-157.61)   25.81                72
 01/18/2020   00:52:38   ( -70.50, -16.44) 01/18/2020   00:53:49  ( -70.52, -16.41)    2.10                71
 01/18/2020   01:43:22   (  70.38, 151.06) 01/18/2020   01:43:16  (  70.41, 151.08)    2.94                 6
 01/18/2020   02:34:01   ( -70.18, -41.31) 01/18/2020   02:32:47  ( -70.25, -41.52)   10.96                74
 01/20/2020   17:09:05   ( -70.60,  99.29) 01/20/2020   17:10:17  ( -70.55,  99.52)   10.40                72
 01/20/2020   17:59:47   (  70.38, -93.05) 01/20/2020   17:59:45  (  70.38, -93.08)    1.11                 2
 01/20/2020   18:50:28   ( -70.28,  74.43) 01/20/2020   18:49:15  ( -70.28,  74.41)    1.00                73
 01/23/2020   09:25:32   ( -70.71,-144.98) 01/23/2020   09:26:44  ( -70.64,-144.47)   20.34                72
 01/23/2020   10:16:12   (  70.39,  22.85) 01/23/2020   10:16:13  (  70.42,  22.85)    3.02                 1
 01/23/2020   11:06:53   ( -70.28,-169.67) 01/23/2020   11:05:43  ( -70.31,-169.67)    3.32                70
 01/26/2020   01:42:00   ( -70.87, -29.33) 01/26/2020   01:43:11  ( -70.72, -28.46)   35.81                71
 01/26/2020   02:32:37   (  70.39, 138.74) 01/26/2020   02:32:42  (  70.39, 138.69)    1.91                 5
 01/26/2020   03:23:18   ( -70.29, -53.77) 01/26/2020   03:22:12  ( -70.29, -53.82)    2.04                66