Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2019 7 30.  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)
 07/30/2019   12:49:17   (  71.21, -16.64) 07/30/2019   12:50:25  (  71.06, -14.75)   70.15                68
 07/30/2019   13:39:46   ( -70.44, 151.95) 07/30/2019   13:40:04  ( -70.45, 151.96)    1.80                18
 07/30/2019   14:30:30   (  70.36, -40.62) 07/30/2019   14:29:31  (  70.35, -40.54)    3.16                59
 08/02/2019   05:05:46   (  71.32,  99.05) 08/02/2019   05:06:53  (  71.18, 101.32)   82.88                67
 08/02/2019   05:56:13   ( -70.45, -92.18) 08/02/2019   05:56:34  ( -70.47, -92.14)    2.97                21
 08/02/2019   06:46:55   (  70.32,  75.33) 08/02/2019   06:46:01  (  70.31,  75.28)    2.19                54
 08/04/2019   21:22:14   (  71.43,-145.27) 08/04/2019   21:23:19  (  71.35,-142.52)   97.93                65
 08/04/2019   22:12:39   ( -70.46,  23.69) 08/04/2019   22:13:04  ( -70.43,  23.68)    3.30                25
 08/04/2019   23:03:22   (  70.33,-168.80) 08/04/2019   23:02:31  (  70.32,-168.83)    1.34                51
 08/07/2019   14:29:06   ( -70.47, 139.55) 08/07/2019   14:29:34  ( -70.44, 139.58)    3.37                28
 08/07/2019   15:19:49   (  70.34, -52.93) 08/07/2019   15:19:01  (  70.33, -52.94)    0.84                48
 08/10/2019   06:45:32   ( -70.43,-104.50) 08/10/2019   06:46:04  ( -70.45,-104.53)    2.61                32
 08/10/2019   07:36:16   (  70.35,  62.94) 08/10/2019   07:35:31  (  70.34,  62.95)    1.19                45
 08/12/2019   23:01:58   ( -70.44,  11.37) 08/12/2019   23:02:33  ( -70.46,  11.36)    1.71                35
 08/12/2019   23:52:42   (  70.36, 178.81) 08/12/2019   23:52:00  (  70.34, 178.84)    2.08                42