Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2019 12 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)
 12/08/2019   19:55:58   (  71.36,-123.67) 12/08/2019   19:57:04  (  71.24,-121.11)   92.38                66
 12/08/2019   20:46:23   ( -70.40,  45.26) 12/08/2019   20:46:47  ( -70.42,  45.26)    2.96                24
 12/08/2019   21:37:07   (  70.31,-147.30) 12/08/2019   21:36:14  (  70.32,-147.24)    2.07                53
 12/11/2019   13:02:49   ( -70.43, 161.11) 12/11/2019   13:03:16  ( -70.41, 161.13)    1.86                27
 12/11/2019   13:53:32   (  70.29, -31.37) 12/11/2019   13:52:43  (  70.31, -31.38)    1.68                49
 12/14/2019   05:19:13   ( -70.41, -82.97) 12/14/2019   05:19:44  ( -70.40, -83.01)    1.85                31
 12/14/2019   06:09:57   (  70.32,  84.48) 12/14/2019   06:09:10  (  70.34,  84.56)    3.59                47
 12/16/2019   21:35:39   ( -70.45,  32.87) 12/16/2019   21:36:12  ( -70.44,  32.93)    2.29                33
 12/16/2019   22:26:22   (  70.31,-159.60) 12/16/2019   22:25:39  (  70.32,-159.59)    1.88                43
 12/19/2019   13:52:04   ( -70.43, 148.79) 12/19/2019   13:52:41  ( -70.42, 148.78)    1.80                37
 12/19/2019   14:42:47   (  70.29, -43.68) 12/19/2019   14:42:08  (  70.30, -43.75)    2.88                39