Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2025 4 19.  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)
 04/21/2025   08:38:49   (  -0.01,-104.36) (   0.78,-107.97)  411.92                80
 04/22/2025   08:17:22   (  -0.01,-104.35) (  -0.24,-103.44)  104.91                80
 04/23/2025   20:39:14   (   0.01,-104.38) (  -0.99,-108.72)  494.90                80
 04/24/2025   20:23:08   (   0.01,-104.38) (   0.03,-104.18)   22.49                80
 04/27/2025   08:26:07   (  -0.01,-104.35) (   0.12,-104.90)   63.75                80
 04/28/2025   08:04:40   (  -0.01,-104.34) (  -0.90,-100.37)  452.89                80
 04/29/2025   20:26:33   (   0.01,-104.36) (  -0.30,-105.65)  147.52                80
 04/30/2025   20:10:26   (   0.01,-104.36) (   0.73,-101.12)  369.43                80
 05/02/2025   08:32:11   (  -0.01,-104.33) (   0.44,-106.38)  233.56                80
 05/03/2025   08:10:44   (  -0.00,-104.32) (  -0.53,-101.83)  283.22                80