Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2025 6 25.  Predictions up to the next  14.0 days:

     Date     Time(GOES-18)   GOES-18 Lat/Lon  NOAA-21 Lat/Lon    Distance(km)  Time Diff(sec)
 06/25/2025   22:40:55   (   0.02,-137.00) (  -0.47,-139.23)  253.47                80
 06/26/2025   22:24:51   (   0.01,-137.00) (   0.53,-134.70)  262.74                80
 06/28/2025   10:43:59   (  -0.01,-137.00) (   0.63,-139.97)  338.66                80
 06/29/2025   10:27:55   (  -0.00,-137.00) (  -0.37,-135.44)  177.60                80
 06/30/2025   22:47:12   (   0.00,-137.00) (  -0.84,-140.74)  426.98                80
 07/01/2025   22:31:07   (  -0.00,-137.00) (   0.15,-136.21)   89.10                80
 07/04/2025   10:34:11   (  -0.00,-136.98) (  -0.00,-136.96)    2.75                80
 07/06/2025   22:34:45   (   0.01,-136.96) (  -0.14,-137.74)   88.17                80
 07/07/2025   22:18:41   (   0.01,-136.95) (   0.86,-133.21)  426.73                80
 07/09/2025   10:37:48   (  -0.01,-136.92) (   0.35,-138.47)  177.19                80