Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2019 4 19.  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)
 04/19/2019   17:33:16   ( -70.63,  93.43) 04/19/2019   17:34:15  ( -70.62,  93.39)    2.26                59
 04/19/2019   18:24:00   (  70.53, -99.09) 04/19/2019   18:23:42  (  70.52, -99.12)    1.48                18
 04/19/2019   19:14:30   ( -69.84,  69.30) 04/19/2019   19:13:21  ( -69.91,  67.64)   63.74                69
 04/22/2019   09:49:44   ( -70.65,-150.72) 04/22/2019   09:50:42  ( -70.67,-150.66)    3.12                58
 04/22/2019   10:40:28   (  70.54,  16.77) 04/22/2019   10:40:09  (  70.56,  16.83)    3.38                19
 04/22/2019   11:30:58   ( -69.85,-174.85) 04/22/2019   11:29:49  ( -69.91,-176.48)   62.86                69
 04/25/2019   02:06:12   ( -70.67, -34.86) 04/25/2019   02:07:10  ( -70.66, -34.79)    2.80                58
 04/25/2019   02:56:56   (  70.56, 132.62) 04/25/2019   02:56:37  (  70.55, 132.69)    2.93                19
 04/25/2019   03:47:26   ( -69.87, -58.99) 04/25/2019   03:46:17  ( -69.90, -60.61)   62.10                69
 04/27/2019   18:22:38   ( -70.63,  81.07) 04/27/2019   18:23:37  ( -70.65,  81.07)    1.79                59
 04/27/2019   19:13:22   (  70.53,-111.45) 04/27/2019   19:13:04  (  70.54,-111.45)    0.92                18
 04/27/2019   20:03:53   ( -69.89,  56.86) 04/27/2019   20:02:43  ( -69.94,  55.32)   58.87                70
 04/30/2019   10:39:06   ( -70.66,-163.08) 04/30/2019   10:40:05  ( -70.63,-163.07)    2.38                59
 04/30/2019   11:29:49   (  70.50,   4.48) 04/30/2019   11:29:32  (  70.52,   4.40)    3.66                17
 04/30/2019   12:20:20   ( -69.86, 172.78) 04/30/2019   12:19:11  ( -69.93, 171.18)   61.81                69
 05/03/2019   02:55:33   ( -70.63, -47.16) 05/03/2019   02:56:33  ( -70.61, -47.22)    2.83                60
 05/03/2019   03:46:17   (  70.52, 120.32) 05/03/2019   03:45:59  (  70.55, 120.33)    2.96                18