Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 9 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)
 09/20/2020   15:05:25   ( -71.50, 129.33) 09/20/2020   15:06:32  ( -71.39, 131.77)   87.43                67
 09/20/2020   15:55:54   (  70.61, -61.84) 09/20/2020   15:56:12  (  70.59, -61.85)    1.97                18
 09/20/2020   16:46:35   ( -70.51, 105.63) 09/20/2020   16:45:41  ( -70.53, 105.71)    3.61                54
 09/23/2020   08:12:16   (  70.63,  54.04) 09/23/2020   08:12:40  (  70.63,  54.10)    2.54                24
 09/23/2020   09:02:57   ( -70.53,-138.48) 09/23/2020   09:02:10  ( -70.53,-138.42)    2.25                47
 09/26/2020   00:28:38   (  70.60, 170.00) 09/26/2020   00:29:10  (  70.63, 169.97)    3.09                32
 09/26/2020   01:19:19   ( -70.50, -22.52) 09/26/2020   01:18:40  ( -70.52, -22.55)    2.85                39
 09/28/2020   16:45:01   (  70.63, -74.13) 09/28/2020   16:45:40  (  70.61, -74.17)    2.15                39
 09/28/2020   17:35:42   ( -70.52,  93.36) 09/28/2020   17:35:10  ( -70.51,  93.31)    2.22                32
 10/01/2020   09:01:24   (  70.65,  41.74) 10/01/2020   09:02:09  (  70.65,  41.77)    1.00                45
 10/01/2020   09:52:05   ( -70.55,-150.76) 10/01/2020   09:51:39  ( -70.55,-150.75)    0.98                26
 10/04/2020   01:17:45   (  70.63, 157.70) 10/04/2020   01:18:38  (  70.64, 157.62)    2.66                53