Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 10 21.  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)
 10/22/2020   19:12:39   (  71.65,-112.64) 10/22/2020   19:13:44  (  71.52,-109.83)   99.81                65
 10/22/2020   20:03:03   ( -70.64,  56.42) 10/22/2020   20:03:28  ( -70.64,  56.41)    1.03                25
 10/22/2020   20:53:47   (  70.56,-136.13) 10/22/2020   20:52:55  (  70.54,-136.09)    2.24                52
 10/25/2020   12:19:25   ( -70.63, 172.36) 10/25/2020   12:19:57  ( -70.63, 172.29)    2.76                32
 10/25/2020   13:10:09   (  70.55, -20.20) 10/25/2020   13:09:24  (  70.53, -20.22)    1.58                45
 10/28/2020   04:35:48   ( -70.67, -71.78) 10/28/2020   04:36:25  ( -70.68, -71.76)    1.40                37
 10/28/2020   05:26:32   (  70.59,  95.65) 10/28/2020   05:25:52  (  70.58,  95.73)    3.31                40
 10/30/2020   20:52:10   ( -70.65,  44.16) 10/30/2020   20:52:54  ( -70.66,  44.10)    2.49                44
 10/30/2020   21:42:54   (  70.58,-148.42) 10/30/2020   21:42:21  (  70.56,-148.42)    2.88                33
 11/02/2020   13:08:32   ( -70.69, 160.01) 11/02/2020   13:09:21  ( -70.70, 160.03)    0.94                49
 11/02/2020   13:59:15   (  70.58, -32.49) 11/02/2020   13:58:48  (  70.59, -32.48)    1.32                27