Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 10 20.  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   04:37:25   (  70.52, 108.00) 10/20/2020   04:36:27  (  70.53, 108.02)    1.09                58
 10/22/2020   19:12:39   (  71.61,-112.56) 10/22/2020   19:13:45  (  71.51,-109.85)   96.03                66
 10/22/2020   20:03:04   ( -70.65,  56.40) 10/22/2020   20:03:29  ( -70.63,  56.40)    2.94                25
 10/22/2020   20:53:47   (  70.51,-136.06) 10/22/2020   20:52:56  (  70.53,-136.10)    2.72                51
 10/25/2020   12:19:25   ( -70.63, 172.35) 10/25/2020   12:19:57  ( -70.62, 172.27)    3.20                32
 10/25/2020   13:10:09   (  70.55, -20.20) 10/25/2020   13:09:24  (  70.52, -20.23)    3.30                45
 10/28/2020   04:35:48   ( -70.67, -71.79) 10/28/2020   04:36:25  ( -70.67, -71.78)    0.35                37
 10/28/2020   05:26:31   (  70.54,  95.73) 10/28/2020   05:25:52  (  70.57,  95.71)    3.01                39
 10/30/2020   20:52:10   ( -70.65,  44.16) 10/30/2020   20:52:54  ( -70.65,  44.09)    2.84                44
 10/30/2020   21:42:54   (  70.58,-148.42) 10/30/2020   21:42:21  (  70.55,-148.43)    3.53                33
 11/02/2020   13:08:33   ( -70.68, 160.02) 11/02/2020   13:09:22  ( -70.69, 160.02)    0.69                49
 11/02/2020   13:59:16   (  70.57, -32.48) 11/02/2020   13:58:49  (  70.58, -32.49)    1.50                27