Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and FY3D
TLE Epoch: 2024 5 22.  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)
 06/04/2024   05:57:29   ( -81.10,-146.30) 06/04/2024   05:56:14  ( -81.10,-146.46)    2.71                75
 06/04/2024   07:38:59   ( -81.11,-171.77) 06/04/2024   07:37:45  ( -81.10,-171.94)    3.05                74
 06/04/2024   08:29:44   (  81.11,  -4.49) 06/04/2024   08:28:29  (  81.10,  -4.46)    0.77                75
 06/04/2024   09:20:28   ( -81.10, 163.14) 06/04/2024   09:19:15  ( -81.11, 162.96)    3.21                73
 06/04/2024   10:11:13   (  81.10, -29.58) 06/04/2024   10:09:59  (  81.11, -29.56)    0.92                74
 06/04/2024   11:01:59   ( -81.11, 137.29) 06/04/2024   11:00:46  ( -81.10, 137.47)    3.25                73
 06/04/2024   11:52:43   (  81.10, -55.05) 06/04/2024   11:51:30  (  81.11, -55.05)    0.36                73
 06/04/2024   12:43:28   ( -81.10, 112.20) 06/04/2024   12:42:16  ( -81.11, 112.37)    2.92                72
 06/04/2024   13:34:13   (  81.11, -80.52) 06/04/2024   13:33:01  (  81.10, -80.53)    0.22                72
 06/04/2024   14:24:58   ( -81.11,  86.73) 06/04/2024   14:23:47  ( -81.11,  86.89)    2.64                71
 06/04/2024   15:15:43   (  81.11,-105.99) 06/04/2024   15:14:32  (  81.10,-106.02)    0.78                71
 06/04/2024   16:06:28   ( -81.11,  61.27) 06/04/2024   16:05:18  ( -81.10,  61.40)    2.46                70
 06/04/2024   16:57:12   (  81.10,-131.08) 06/04/2024   16:56:02  (  81.11,-131.12)    0.97                70
 06/04/2024   17:47:57   ( -81.10,  36.17) 06/04/2024   17:46:48  ( -81.11,  36.30)    2.33                69
 06/04/2024   18:38:42   (  81.10,-156.55) 06/04/2024   18:37:33  (  81.11,-156.60)    0.92                69
 06/04/2024   19:29:27   ( -81.10,  10.71) 06/04/2024   19:28:19  ( -81.11,  10.82)    1.96                68
 06/04/2024   20:20:12   (  81.11, 177.98) 06/04/2024   20:19:04  (  81.10, 177.91)    1.17                68
 06/04/2024   21:10:57   ( -81.11, -14.76) 06/04/2024   21:09:50  ( -81.11, -14.66)    1.69                67
 06/04/2024   22:01:42   (  81.11, 152.51) 06/04/2024   22:00:35  (  81.10, 152.43)    1.59                67
 06/04/2024   22:52:27   ( -81.11, -40.23) 06/04/2024   22:51:21  ( -81.10, -40.15)    1.59                66
 06/04/2024   23:43:11   (  81.10, 127.42) 06/04/2024   23:42:05  (  81.11, 127.33)    1.72                66
 06/05/2024   00:33:56   ( -81.10, -65.32) 06/05/2024   00:32:51  ( -81.11, -65.25)    1.41                65
 06/05/2024   01:24:41   (  81.10, 101.95) 06/05/2024   01:23:36  (  81.10, 101.84)    1.86                65
 06/05/2024   02:15:26   ( -81.10, -90.79) 06/05/2024   02:14:22  ( -81.11, -90.73)    0.99                64