Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2019 12 6.  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   05:20:41   (  70.28,  96.86) 12/06/2019   05:19:46  (  70.27,  96.81)    1.87                55
 12/08/2019   19:55:58   (  71.37,-123.67) 12/08/2019   19:57:04  (  71.24,-121.11)   92.45                66
 12/08/2019   20:46:23   ( -70.40,  45.26) 12/08/2019   20:46:47  ( -70.42,  45.27)    3.13                24
 12/08/2019   21:37:07   (  70.31,-147.30) 12/08/2019   21:36:14  (  70.32,-147.24)    2.15                53
 12/11/2019   13:02:49   ( -70.43, 161.10) 12/11/2019   13:03:16  ( -70.41, 161.13)    2.13                27
 12/11/2019   13:53:32   (  70.29, -31.37) 12/11/2019   13:52:43  (  70.30, -31.38)    1.32                49
 12/14/2019   05:19:13   ( -70.42, -82.97) 12/14/2019   05:19:44  ( -70.40, -83.01)    2.19                31
 12/14/2019   06:09:56   (  70.28,  84.55) 12/14/2019   06:09:11  (  70.29,  84.47)    3.20                45
 12/16/2019   21:35:39   ( -70.45,  32.86) 12/16/2019   21:36:12  ( -70.43,  32.92)    3.29                33
 12/16/2019   22:26:22   (  70.32,-159.61) 12/16/2019   22:25:39  (  70.32,-159.60)    0.64                43
 12/19/2019   13:52:04   ( -70.44, 148.77) 12/19/2019   13:52:40  ( -70.47, 148.85)    3.70                36
 12/19/2019   14:42:47   (  70.30, -43.69) 12/19/2019   14:42:08  (  70.29, -43.76)    2.57                39