Simultaneous Nadir Overpasses (SNOs) between HIMAWARI-9 and NOAA-21
TLE Epoch: 2025 9 18.  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)
 09/19/2025   03:54:40   (   0.04, 140.72) (   0.52, 142.85)  243.75                80
 09/20/2025   16:16:28   (  -0.04, 140.75) (   0.65, 137.59)  360.76                80
 09/21/2025   15:55:02   (  -0.04, 140.74) (  -0.35, 142.12)  157.84                80
 09/23/2025   04:16:58   (   0.04, 140.65) (  -0.81, 136.82)  436.02                80
 09/24/2025   04:00:52   (   0.04, 140.62) (   0.19, 141.36)   83.37                80
 09/26/2025   16:01:14   (  -0.04, 140.62) (  -0.03, 140.62)    0.53                80
 09/29/2025   04:04:24   (   0.04, 140.50) (  -0.11, 139.85)   74.23                80
 09/30/2025   03:48:18   (   0.04, 140.47) (   0.89, 144.39)  445.64                80
 10/01/2025   16:10:06   (  -0.05, 140.48) (   0.26, 139.12)  155.72                80