Simultaneous Nadir Overpasses (SNOs) between HIMAWARI-9 and NOAA-21
TLE Epoch: 2025 5 16.  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)
 05/18/2025   04:16:32   (  -0.01, 140.77) (  -0.85, 136.93)  437.70                80
 05/19/2025   04:00:28   (  -0.02, 140.77) (   0.11, 141.47)   78.84                80
 05/21/2025   16:03:35   (   0.02, 140.75) (   0.01, 140.71)    4.96                80
 05/24/2025   04:04:08   (  -0.02, 140.73) (  -0.18, 139.92)   91.66                80
 05/25/2025   03:48:04   (  -0.02, 140.72) (   0.79, 144.46)  425.55                80
 05/26/2025   16:09:54   (   0.01, 140.70) (   0.34, 139.17)  173.46                80
 05/27/2025   15:48:31   (   0.01, 140.68) (  -0.69, 143.69)  343.75                80
 05/29/2025   04:10:28   (  -0.00, 140.67) (  -0.50, 138.39)  260.25                80
 05/30/2025   03:54:24   (  -0.01, 140.66) (   0.47, 142.92)  257.66                80