Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2025 7 20.  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)
 07/22/2025   22:34:49   (   0.02,-136.98) (  -0.17,-137.75)   88.41                80
 07/23/2025   22:18:45   (   0.03,-136.97) (   0.84,-133.22)  426.79                80
 07/25/2025   10:37:53   (  -0.03,-136.94) (   0.30,-138.50)  177.01                80
 07/26/2025   10:21:49   (  -0.03,-136.93) (  -0.71,-133.97)  338.17                80
 07/27/2025   22:41:06   (   0.03,-136.93) (  -0.47,-139.28)  267.04                80
 07/28/2025   22:25:02   (   0.03,-136.92) (   0.55,-134.75)  248.15                80
 07/30/2025   10:44:09   (  -0.04,-136.89) (   0.66,-140.01)  356.00                80
 07/31/2025   10:28:04   (  -0.04,-136.87) (  -0.35,-135.48)  158.74                80
 08/01/2025   22:47:21   (   0.04,-136.86) (  -0.86,-140.78)  447.49                80
 08/02/2025   22:31:16   (   0.04,-136.84) (   0.15,-136.25)   66.82                80