Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and FY3D
TLE Epoch: 2025 10 8.  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)
 10/21/2025   07:40:15   (  80.99,  11.74) 10/21/2025   07:41:22  (  80.95,  14.99)   56.95                67
 10/21/2025   09:21:41   (  80.93, -12.25) 10/21/2025   09:22:55  (  80.91, -11.72)    9.58                74
 10/21/2025   11:03:10   (  80.91, -37.34) 10/21/2025   11:04:25  (  80.90, -37.31)    1.23                75
 10/21/2025   11:54:00   ( -81.00, 127.96) 10/21/2025   11:55:06  ( -80.95, 131.74)   66.13                66
 10/21/2025   12:44:39   (  80.90, -62.43) 10/21/2025   12:45:54  (  80.91, -62.53)    2.00                75
 10/21/2025   13:35:26   ( -80.94, 103.97) 10/21/2025   13:36:39  ( -80.91, 105.04)   18.97                73
 10/21/2025   14:26:09   (  80.90, -87.88) 10/21/2025   14:27:23  (  80.91, -87.75)    2.45                74
 10/21/2025   15:16:53   ( -80.89,  79.60) 10/21/2025   15:18:09  ( -80.91,  79.45)    3.09                76
 10/21/2025   16:07:39   (  80.91,-113.33) 10/21/2025   16:08:53  (  80.90,-113.34)    0.30                74
 10/21/2025   16:58:23   ( -80.92,  53.79) 10/21/2025   16:59:38  ( -80.90,  53.86)    1.90                75
 10/21/2025   17:49:08   (  80.91,-138.78) 10/21/2025   17:50:22  (  80.90,-138.93)    3.05                74
 10/21/2025   18:39:52   ( -80.90,  28.70) 10/21/2025   18:41:07  ( -80.91,  28.63)    1.31                75
 10/21/2025   19:30:38   (  80.91,-164.23) 10/21/2025   19:31:51  (  80.90,-164.16)    1.71                73
 10/21/2025   20:21:22   ( -80.91,   3.25) 10/21/2025   20:22:36  ( -80.91,   3.41)    2.82                74
 10/21/2025   21:12:07   (  80.90, 170.68) 10/21/2025   21:13:20  (  80.91, 170.62)    1.38                73
 10/21/2025   22:02:52   ( -80.91, -22.19) 10/21/2025   22:04:06  ( -80.90, -22.18)    0.62                74
 10/21/2025   22:53:37   (  80.90, 145.23) 10/21/2025   22:54:49  (  80.91, 145.40)    3.05                72
 10/21/2025   23:44:21   ( -80.90, -47.28) 10/21/2025   23:45:35  ( -80.91, -47.40)    2.52                74
 10/22/2025   00:35:07   (  80.91, 119.78) 10/22/2025   00:36:19  (  80.90, 119.81)    0.46                72
 10/22/2025   01:25:52   ( -80.92, -73.09) 10/22/2025   01:27:05  ( -80.90, -72.99)    2.37                73
 10/22/2025   02:16:37   (  80.91,  94.34) 10/22/2025   02:17:49  (  80.90,  94.22)    2.50                72
 10/22/2025   03:07:21   ( -80.90, -98.18) 10/22/2025   03:08:34  ( -80.91, -98.21)    0.71                73