Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2019 12 9.  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)
 12/11/2019   13:02:49   ( -70.43, 161.10) 12/11/2019   13:03:16  ( -70.40, 161.12)    3.15                27
 12/11/2019   13:53:32   (  70.29, -31.37) 12/11/2019   13:52:43  (  70.30, -31.39)    0.88                49
 12/14/2019   05:19:13   ( -70.41, -82.97) 12/14/2019   05:19:44  ( -70.39, -83.02)    2.97                31
 12/14/2019   06:09:57   (  70.33,  84.47) 12/14/2019   06:09:10  (  70.34,  84.54)    2.88                47
 12/16/2019   21:35:39   ( -70.45,  32.87) 12/16/2019   21:36:12  ( -70.43,  32.91)    2.61                33
 12/16/2019   22:26:22   (  70.31,-159.60) 12/16/2019   22:25:39  (  70.32,-159.60)    1.11                43
 12/19/2019   13:52:04   ( -70.43, 148.79) 12/19/2019   13:52:41  ( -70.41, 148.76)    2.75                37
 12/19/2019   14:42:48   (  70.34, -43.76) 12/19/2019   14:42:07  (  70.35, -43.68)    2.94                41
 12/22/2019   06:08:29   ( -70.42, -95.29) 12/22/2019   06:09:09  ( -70.44, -95.31)    2.57                40
 12/22/2019   06:59:13   (  70.32,  72.17) 12/22/2019   06:58:36  (  70.32,  72.16)    0.65                37