Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 2 7.  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)
 02/08/2020   11:04:12   ( -71.38,-170.71) 02/08/2020   11:05:18  ( -71.31,-168.15)   91.32                66
 02/08/2020   11:54:40   (  70.44,  -1.82) 02/08/2020   11:54:59  (  70.45,  -1.83)    1.33                19
 02/08/2020   12:45:21   ( -70.33, 165.67) 02/08/2020   12:44:29  ( -70.33, 165.64)    1.23                52
 02/11/2020   04:11:05   (  70.46, 114.04) 02/11/2020   04:11:27  (  70.47, 114.08)    2.16                22
 02/11/2020   05:01:46   ( -70.35, -78.46) 02/11/2020   05:00:57  ( -70.36, -78.44)    1.83                49
 02/13/2020   20:27:28   (  70.44,-130.02) 02/13/2020   20:27:55  (  70.45,-130.07)    2.28                27
 02/13/2020   21:18:10   ( -70.37,  37.41) 02/13/2020   21:17:25  ( -70.34,  37.40)    3.02                45
 02/16/2020   12:43:53   (  70.47, -14.17) 02/16/2020   12:44:23  (  70.49, -14.14)    1.99                30
 02/16/2020   13:34:35   ( -70.40, 153.27) 02/16/2020   13:33:53  ( -70.38, 153.34)    3.26                42
 02/19/2020   05:00:17   (  70.46, 101.75) 02/19/2020   05:00:52  (  70.48, 101.72)    1.90                35
 02/19/2020   05:50:59   ( -70.38, -90.80) 02/19/2020   05:50:22  ( -70.37, -90.80)    0.53                37