Simultaneous Nadir Overpasses (SNOs) between HIMAWARI-9 and NOAA-21
TLE Epoch: 2025 12 3.  Predictions up to the next  14.0 days:

     Date     Time(HIMAWARI-9)   HIMAWARI-9 Lat/Lon  NOAA-21 Lat/Lon    Distance(km)  Time Diff(sec)
 12/04/2025   16:10:08   (   0.04, 140.75) (   0.38, 139.21)  174.99                80
 12/05/2025   15:48:45   (   0.04, 140.75) (  -0.60, 143.74)  340.70                80
 12/07/2025   04:10:44   (  -0.04, 140.72) (  -0.58, 138.43)  262.02                80
 12/08/2025   03:54:41   (  -0.04, 140.72) (   0.47, 142.95)  254.50                80
 12/09/2025   16:16:31   (   0.03, 140.72) (   0.74, 137.68)  347.62                80
 12/10/2025   15:55:08   (   0.03, 140.72) (  -0.31, 142.20)  169.26                80
 12/12/2025   04:17:07   (  -0.03, 140.68) (  -0.91, 136.89)  431.84                80
 12/13/2025   04:01:04   (  -0.03, 140.66) (   0.15, 141.41)   86.06                80
 12/15/2025   16:01:31   (   0.03, 140.63) (   0.00, 140.66)    4.74                80