Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 9 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)
 09/20/2020   15:05:25   ( -71.53, 129.28) 09/20/2020   15:06:31  ( -71.42, 131.81)   90.42                66
 09/20/2020   15:55:53   (  70.58, -61.80) 09/20/2020   15:56:11  (  70.61, -61.81)    3.12                18
 09/20/2020   16:46:34   ( -70.49, 105.67) 09/20/2020   16:45:41  ( -70.50, 105.66)    1.74                53
 09/23/2020   08:12:16   (  70.60,  54.08) 09/23/2020   08:12:41  (  70.60,  54.06)    0.94                25
 09/23/2020   09:02:57   ( -70.50,-138.44) 09/23/2020   09:02:11  ( -70.50,-138.47)    1.28                46
 09/26/2020   00:28:39   (  70.62, 169.96) 09/26/2020   00:29:10  (  70.65, 170.00)    3.28                31
 09/26/2020   01:19:20   ( -70.52, -22.55) 09/26/2020   01:18:40  ( -70.54, -22.52)    3.01                40
 09/28/2020   16:45:02   (  70.64, -74.16) 09/28/2020   16:45:40  (  70.64, -74.13)    1.13                38
 09/28/2020   17:35:43   ( -70.54,  93.34) 09/28/2020   17:35:10  ( -70.54,  93.35)    0.52                33
 10/01/2020   09:01:23   (  70.61,  41.81) 10/01/2020   09:02:09  (  70.62,  41.73)    3.21                46
 10/01/2020   09:52:05   ( -70.56,-150.78) 10/01/2020   09:51:38  ( -70.58,-150.71)    3.49                27