Simultaneous Nadir Overpasses (SNOs) between HIMAWARI-9 and NOAA-21
TLE Epoch: 2025 5 12.  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)
 05/13/2025   04:10:12   (  -0.00, 140.75) (  -0.52, 138.46)  260.93                80
 05/14/2025   03:54:08   (   0.00, 140.75) (   0.50, 142.99)  255.55                80
 05/15/2025   16:15:59   (  -0.01, 140.73) (   0.66, 137.71)  344.40                80
 05/16/2025   15:54:35   (  -0.01, 140.72) (  -0.36, 142.23)  172.04                80
 05/18/2025   04:16:33   (   0.02, 140.72) (  -0.83, 136.92)  432.57                80
 05/19/2025   04:00:29   (   0.01, 140.71) (   0.19, 141.45)   84.64                80
 05/21/2025   16:00:55   (  -0.01, 140.66) (  -0.01, 140.70)    4.07                80
 05/24/2025   04:04:09   (   0.02, 140.63) (  -0.16, 139.92)   81.75                80
 05/25/2025   03:48:05   (   0.02, 140.61) (   0.87, 144.44)  436.20                80