Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2019 12 4.  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)
 12/06/2019   03:39:30   (  71.24, 120.66) 12/06/2019   03:40:37  (  71.14, 122.85)   79.15                67
 12/06/2019   04:29:58   ( -70.42, -70.67) 12/06/2019   04:30:18  ( -70.42, -70.61)    2.31                20
 12/06/2019   05:20:41   (  70.29,  96.85) 12/06/2019   05:19:46  (  70.27,  96.80)    2.74                55
 12/08/2019   19:55:58   (  71.37,-123.68) 12/08/2019   19:57:04  (  71.24,-121.12)   92.47                66
 12/08/2019   20:46:23   ( -70.40,  45.26) 12/08/2019   20:46:47  ( -70.42,  45.26)    2.28                24
 12/08/2019   21:37:07   (  70.32,-147.30) 12/08/2019   21:36:14  (  70.31,-147.25)    1.94                53
 12/11/2019   13:02:49   ( -70.43, 161.10) 12/11/2019   13:03:16  ( -70.41, 161.12)    2.74                27
 12/11/2019   13:53:32   (  70.30, -31.37) 12/11/2019   13:52:43  (  70.30, -31.39)    0.78                49
 12/14/2019   05:19:13   ( -70.41, -82.97) 12/14/2019   05:19:44  ( -70.39, -83.02)    3.11                31
 12/14/2019   06:09:57   (  70.33,  84.47) 12/14/2019   06:09:10  (  70.33,  84.54)    2.57                47
 12/16/2019   21:35:38   ( -70.40,  32.95) 12/16/2019   21:36:12  ( -70.42,  32.91)    3.28                34
 12/16/2019   22:26:22   (  70.31,-159.60) 12/16/2019   22:25:39  (  70.31,-159.61)    0.57                43