Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2025 7 15.  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)
 07/16/2025   22:47:18   (   0.01,-137.01) (  -0.81,-140.78)  428.56                80
 07/17/2025   22:31:14   (   0.01,-137.01) (   0.19,-136.24)   87.65                80
 07/20/2025   10:31:37   (  -0.01,-136.99) (  -0.00,-136.98)    1.78                80
 07/22/2025   22:34:49   (   0.01,-136.97) (  -0.17,-137.76)   89.37                80
 07/23/2025   22:18:45   (   0.01,-136.96) (   0.84,-133.22)  425.74                80
 07/25/2025   10:37:53   (  -0.02,-136.94) (   0.31,-138.50)  177.50                80
 07/26/2025   10:21:49   (  -0.01,-136.93) (  -0.70,-133.97)  337.63                80
 07/27/2025   22:41:05   (   0.01,-136.92) (  -0.53,-139.27)  268.42                80
 07/28/2025   22:25:01   (   0.01,-136.90) (   0.49,-134.74)  246.68                80