Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2025 5 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NOAA-21 Lat/Lon    Distance(km)  Time Diff(sec)
 05/20/2025   20:35:04   (  -0.01,-104.42) (   0.00,-107.50)  343.17                 0
 05/21/2025   20:17:30   (  -0.01,-104.42) (   0.38,-102.83)  181.66                80
 05/23/2025   08:39:19   (   0.01,-104.40) (   0.82,-108.11)  421.75                80
 05/24/2025   08:17:55   (   0.01,-104.40) (  -0.15,-103.57)   94.10                80
 05/26/2025   20:23:49   (  -0.01,-104.42) (  -0.01,-104.35)    7.03                80
 05/29/2025   08:26:54   (   0.00,-104.40) (   0.16,-105.11)   80.94                80
 05/30/2025   08:05:31   (  -0.00,-104.39) (  -0.87,-100.58)  434.55                80
 05/31/2025   20:27:28   (   0.01,-104.41) (  -0.32,-105.89)  169.09                80
 06/01/2025   20:11:25   (   0.01,-104.41) (   0.72,-101.37)  347.23                80
 06/03/2025   08:33:13   (  -0.01,-104.41) (   0.51,-106.63)  254.61                80