Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2022 12 14.  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)
 12/14/2022   07:46:19   ( -73.16,-118.09) 12/14/2022   07:47:26  ( -73.07,-115.55)   82.63                67
 12/14/2022   08:36:51   (  72.39,  50.85) 12/14/2022   08:37:04  (  72.40,  50.81)    1.90                13
 12/14/2022   09:27:34   ( -72.32,-141.70) 12/14/2022   09:26:33  ( -72.33,-141.68)    1.48                61
 12/16/2022   23:13:25   (  72.48,-168.44) 12/16/2022   23:14:36  (  72.46,-168.46)    1.69                71
 12/17/2022   00:04:08   ( -72.40,  -0.97) 12/17/2022   00:04:05  ( -72.40,  -0.95)    0.72                 3
 12/17/2022   00:54:47   (  71.98, 167.16) 12/17/2022   00:53:37  (  72.04, 166.04)   38.99                70
 12/19/2022   14:40:43   ( -72.49, 139.75) 12/19/2022   14:41:37  ( -72.50, 139.84)    3.34                54
 12/19/2022   15:31:28   (  72.38, -52.73) 12/19/2022   15:31:04  (  72.40, -52.69)    2.93                24
 12/22/2022   06:08:02   (  72.43,  88.07) 12/22/2022   06:08:37  (  72.43,  87.97)    3.25                35
 12/22/2022   06:58:46   ( -72.39,-104.55) 12/22/2022   06:58:06  ( -72.37,-104.51)    2.69                40
 12/24/2022   20:44:51   (  73.24,-132.76) 12/24/2022   20:45:57  (  73.13,-130.07)   87.55                66
 12/24/2022   21:35:20   ( -72.44,  36.25) 12/24/2022   21:35:38  ( -72.44,  36.23)    0.80                18
 12/24/2022   22:26:05   (  72.34,-156.25) 12/24/2022   22:25:05  (  72.34,-156.31)    2.31                60
 12/27/2022   12:11:57   ( -72.64, 176.73) 12/27/2022   12:13:08  ( -72.59, 177.13)   14.34                71
 12/27/2022   13:02:40   (  72.45, -15.57) 12/27/2022   13:02:36  (  72.44, -15.52)    2.34                 4