Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 10 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)
 10/20/2020   02:56:12   (  71.39, 131.91) 10/20/2020   02:57:20  (  71.26, 133.87)   71.13                68
 10/20/2020   03:46:41   ( -70.65, -59.50) 10/20/2020   03:46:59  ( -70.65, -59.44)    2.50                18
 10/20/2020   04:37:24   (  70.50, 108.04) 10/20/2020   04:36:27  (  70.50, 107.98)    2.53                57
 10/22/2020   19:12:39   (  71.64,-112.61) 10/22/2020   19:13:44  (  71.53,-109.81)   99.29                65
 10/22/2020   20:03:03   ( -70.63,  56.44) 10/22/2020   20:03:28  ( -70.66,  56.44)    3.07                25
 10/22/2020   20:53:47   (  70.54,-136.10) 10/22/2020   20:52:55  (  70.55,-136.06)    2.15                52
 10/25/2020   12:19:26   ( -70.66, 172.30) 10/25/2020   12:19:57  ( -70.65, 172.32)    1.33                31
 10/25/2020   13:10:09   (  70.53, -20.17) 10/25/2020   13:09:24  (  70.55, -20.19)    2.13                45
 10/28/2020   04:35:48   ( -70.65, -71.75) 10/28/2020   04:36:26  ( -70.64, -71.81)    2.10                38
 10/28/2020   05:26:32   (  70.57,  95.68) 10/28/2020   05:25:52  (  70.59,  95.76)    3.60                40
 10/30/2020   20:52:10   ( -70.68,  44.10) 10/30/2020   20:52:53  ( -70.69,  44.14)    1.27                43
 10/30/2020   21:42:53   (  70.57,-148.39) 10/30/2020   21:42:20  (  70.58,-148.38)    1.38                33