Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2019 12 1.  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)
 12/03/2019   11:23:03   (  71.15,   4.91) 12/03/2019   11:24:11  (  71.01,   6.76)   68.59                68
 12/03/2019   12:13:32   ( -70.38, 173.49) 12/03/2019   12:13:50  ( -70.40, 173.48)    2.42                18
 12/03/2019   13:04:16   (  70.31, -19.07) 12/03/2019   13:03:17  (  70.30, -19.02)    1.94                59
 12/06/2019   03:39:31   (  71.28, 120.58) 12/06/2019   03:40:37  (  71.19, 122.93)   84.70                66
 12/06/2019   04:29:58   ( -70.41, -70.66) 12/06/2019   04:30:19  ( -70.43, -70.61)    2.61                21
 12/06/2019   05:20:41   (  70.28,  96.86) 12/06/2019   05:19:47  (  70.27,  96.80)    2.72                54
 12/08/2019   19:55:59   (  71.42,-123.76) 12/08/2019   19:57:04  (  71.32,-120.98)   99.29                65
 12/08/2019   20:46:23   ( -70.39,  45.27) 12/08/2019   20:46:49  ( -70.40,  45.23)    1.89                26
 12/08/2019   21:37:07   (  70.31,-147.29) 12/08/2019   21:36:16  (  70.29,-147.28)    2.38                51
 12/11/2019   13:02:49   ( -70.42, 161.12) 12/11/2019   13:03:18  ( -70.43, 161.15)    1.69                29
 12/11/2019   13:53:32   (  70.29, -31.36) 12/11/2019   13:52:45  (  70.32, -31.37)    3.12                47
 12/14/2019   05:19:13   ( -70.41, -82.96) 12/14/2019   05:19:47  ( -70.41, -83.00)    1.60                34
 12/14/2019   06:09:57   (  70.32,  84.48) 12/14/2019   06:09:14  (  70.30,  84.48)    3.08                43