Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 4 2.  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)
 04/02/2020   03:04:13   (  70.41, 130.91) 04/02/2020   03:03:08  (  70.40, 130.92)    1.50                65
 04/04/2020   17:39:22   (  71.13, -89.01) 04/04/2020   17:40:31  (  71.01, -87.55)   54.54                69
 04/04/2020   18:29:54   ( -70.52,  79.32) 04/04/2020   18:30:08  ( -70.52,  79.34)    0.47                14
 04/04/2020   19:20:37   (  70.40,-113.17) 04/04/2020   19:19:35  (  70.41,-113.18)    1.76                62
 04/07/2020   09:55:48   (  71.23,  26.73) 04/07/2020   09:56:56  (  71.13,  28.52)   64.93                68
 04/07/2020   10:46:18   ( -70.51,-164.75) 04/07/2020   10:46:35  ( -70.54,-164.76)    3.03                17
 04/07/2020   11:37:02   (  70.44,   2.67) 04/07/2020   11:36:02  (  70.42,   2.72)    2.24                60
 04/10/2020   02:12:13   (  71.32, 142.48) 04/10/2020   02:13:20  (  71.25, 144.59)   75.61                67
 04/10/2020   03:02:42   ( -70.55, -48.91) 04/10/2020   03:03:01  ( -70.55, -48.87)    1.78                19
 04/10/2020   03:53:25   (  70.43, 118.60) 04/10/2020   03:52:28  (  70.43, 118.61)    0.80                57
 04/12/2020   18:28:39   (  71.41,-101.78) 04/12/2020   18:29:46  (  71.31, -99.44)   84.03                67
 04/12/2020   19:19:06   ( -70.54,  67.01) 04/12/2020   19:19:28  ( -70.55,  67.03)    1.74                22
 04/12/2020   20:09:49   (  70.41,-125.48) 04/12/2020   20:08:55  (  70.44,-125.50)    2.49                54
 04/15/2020   10:45:05   (  71.51,  13.96) 04/15/2020   10:46:11  (  71.42,  16.62)   94.62                66
 04/15/2020   11:35:30   ( -70.53,-177.07) 04/15/2020   11:35:55  ( -70.56,-177.09)    3.05                25
 04/15/2020   12:26:14   (  70.46,  -9.64) 04/15/2020   12:25:22  (  70.44,  -9.62)    2.43                52