Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 10 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)
 10/14/2020   18:23:20   (  70.92, -99.12) 10/14/2020   18:24:31  (  70.83, -98.56)   22.74                71
 10/14/2020   19:13:57   ( -70.60,  68.73) 10/14/2020   19:14:03  ( -70.62,  68.74)    1.40                 6
 10/14/2020   20:04:40   (  70.50,-123.80) 10/14/2020   20:03:29  (  70.51,-123.77)    1.38                71
 10/17/2020   10:39:46   (  71.17,  16.38) 10/17/2020   10:40:55  (  71.06,  17.67)   48.31                69
 10/17/2020   11:30:19   ( -70.64,-175.41) 10/17/2020   11:30:31  ( -70.62,-175.36)    2.08                12
 10/17/2020   12:21:02   (  70.49,  -7.86) 10/17/2020   12:19:58  (  70.52,  -7.88)    3.05                64
 10/20/2020   02:56:12   (  71.37, 131.95) 10/20/2020   02:57:20  (  71.28, 133.90)   70.27                68
 10/20/2020   03:46:41   ( -70.62, -59.46) 10/20/2020   03:47:00  ( -70.63, -59.48)    1.18                19
 10/20/2020   04:37:25   (  70.53, 107.99) 10/20/2020   04:36:27  (  70.52, 108.01)    1.57                58
 10/22/2020   19:12:39   (  71.62,-112.58) 10/22/2020   19:13:44  (  71.54,-109.78)   98.84                65
 10/22/2020   20:03:04   ( -70.65,  56.40) 10/22/2020   20:03:29  ( -70.63,  56.40)    3.20                25
 10/22/2020   20:53:47   (  70.52,-136.07) 10/22/2020   20:52:56  (  70.51,-136.12)    1.77                51
 10/25/2020   12:19:25   ( -70.64, 172.34) 10/25/2020   12:19:57  ( -70.62, 172.28)    3.29                32
 10/25/2020   13:10:09   (  70.57, -20.23) 10/25/2020   13:09:23  (  70.56, -20.16)    2.48                46