Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and FY3D
TLE Epoch: 2024 5 26.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(FY3D) FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/08/2024   16:32:36   ( -81.00,  57.80) 06/08/2024   16:31:35  ( -81.06,  52.13)   98.59                61
 06/08/2024   18:14:14   ( -81.11,  29.46) 06/08/2024   18:12:59  ( -81.10,  29.30)    2.75                75
 06/08/2024   19:55:44   ( -81.11,   4.08) 06/08/2024   19:54:29  ( -81.10,   4.20)    2.00                75
 06/08/2024   20:46:29   (  81.11, 171.44) 06/08/2024   20:45:14  (  81.10, 171.29)    2.70                75
 06/08/2024   21:37:14   ( -81.11, -21.29) 06/08/2024   21:36:00  ( -81.10, -21.29)    0.39                74
 06/08/2024   22:27:59   (  81.11, 146.07) 06/08/2024   22:26:44  (  81.11, 146.18)    2.01                75
 06/08/2024   23:18:44   ( -81.11, -46.66) 06/08/2024   23:17:31  ( -81.10, -46.77)    1.92                73
 06/09/2024   00:09:29   (  81.11, 120.69) 06/09/2024   00:08:15  (  81.10, 120.70)    0.19                74
 06/09/2024   01:00:14   ( -81.11, -72.04) 06/09/2024   00:59:01  ( -81.11, -71.87)    2.82                73
 06/09/2024   01:50:59   (  81.11,  95.32) 06/09/2024   01:49:46  (  81.10,  95.21)    1.85                73
 06/09/2024   02:41:44   ( -81.11, -97.41) 06/09/2024   02:40:32  ( -81.10, -97.36)    0.95                72