Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2023 4 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)
 04/19/2023   22:47:34   ( -73.23,  17.98) 04/19/2023   22:48:45  ( -73.09,  18.84)   31.80                71
 04/19/2023   23:38:14   (  72.87,-173.93) 04/19/2023   23:38:14  (  72.89,-173.90)    2.54                 0
 04/20/2023   00:28:57   ( -72.81,  -6.47) 04/20/2023   00:27:43  ( -72.82,  -6.40)    3.14                74
 04/22/2023   14:14:38   (  72.94, -33.13) 04/22/2023   14:15:46  (  72.96, -33.16)    3.18                68
 04/22/2023   15:05:21   ( -72.86, 134.35) 04/22/2023   15:05:15  ( -72.90, 134.35)    3.65                 6
 04/22/2023   15:55:58   (  72.36, -57.30) 04/22/2023   15:54:49  (  72.43, -58.89)   54.15                69
 04/25/2023   05:41:46   ( -72.98, -84.97) 04/25/2023   05:42:46  ( -72.98, -84.88)    2.94                60
 04/25/2023   06:32:31   (  72.89,  82.54) 04/25/2023   06:32:13  (  72.89,  82.58)    1.32                18
 04/25/2023   07:23:01   ( -72.15,-108.63) 04/25/2023   07:21:54  ( -72.18,-111.09)   83.83                67
 04/27/2023   21:08:54   (  72.97,-136.70) 04/27/2023   21:09:42  (  72.98,-136.62)    2.91                48
 04/27/2023   21:59:37   ( -72.89,  30.79) 04/27/2023   21:59:12  ( -72.87,  30.79)    2.27                25
 04/30/2023   12:36:01   ( -72.98, 171.54) 04/30/2023   12:36:41  ( -72.98, 171.62)    2.55                40
 04/30/2023   13:26:46   (  72.90, -20.98) 04/30/2023   13:26:08  (  72.88, -20.93)    2.54                38