Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2019 4 14.  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)
 04/14/2019   09:00:21   ( -70.62,-138.30) 04/14/2019   09:01:20  ( -70.61,-138.38)    2.99                59
 04/14/2019   09:51:05   (  70.52,  29.17) 04/14/2019   09:50:47  (  70.51,  29.11)    2.41                18
 04/14/2019   10:41:35   ( -69.82,-162.44) 04/14/2019   10:40:26  ( -69.90,-164.12)   65.22                69
 04/17/2019   01:16:49   ( -70.63, -22.44) 04/17/2019   01:17:48  ( -70.61, -22.50)    2.49                59
 04/17/2019   02:07:33   (  70.53, 145.03) 04/17/2019   02:07:15  (  70.51, 144.99)    2.59                18
 04/17/2019   02:58:03   ( -69.83, -46.57) 04/17/2019   02:56:54  ( -69.91, -48.24)   64.39                69
 04/19/2019   17:33:17   ( -70.64,  93.42) 04/19/2019   17:34:16  ( -70.62,  93.38)    2.80                59
 04/19/2019   18:24:01   (  70.54, -99.11) 04/19/2019   18:23:42  (  70.56, -99.05)    3.23                19
 04/19/2019   19:14:31   ( -69.84,  69.29) 04/19/2019   19:13:22  ( -69.91,  67.64)   63.60                69
 04/22/2019   09:49:44   ( -70.65,-150.72) 04/22/2019   09:50:42  ( -70.67,-150.66)    2.96                58
 04/22/2019   10:40:28   (  70.55,  16.75) 04/22/2019   10:40:09  (  70.55,  16.82)    2.43                19
 04/22/2019   11:30:58   ( -69.85,-174.85) 04/22/2019   11:29:49  ( -69.91,-176.49)   62.88                69
 04/25/2019   02:06:12   ( -70.66, -34.86) 04/25/2019   02:07:10  ( -70.66, -34.79)    2.60                58
 04/25/2019   02:56:56   (  70.56, 132.61) 04/25/2019   02:56:37  (  70.55, 132.68)    3.23                19
 04/25/2019   03:47:26   ( -69.87, -58.99) 04/25/2019   03:46:17  ( -69.90, -60.61)   62.28                69
 04/27/2019   18:22:39   ( -70.63,  81.08) 04/27/2019   18:23:38  ( -70.65,  81.08)    2.97                59
 04/27/2019   19:13:23   (  70.53,-111.45) 04/27/2019   19:13:05  (  70.53,-111.45)    1.05                18