Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2025 4 23.  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)
 04/23/2025   22:23:52   (  -0.00,-137.00) (   0.59,-134.45)  291.10                80
 04/25/2025   10:43:02   (  -0.00,-137.00) (   0.61,-139.73)  310.62                80
 04/26/2025   10:26:59   (   0.00,-137.00) (  -0.38,-135.20)  205.29                80
 04/27/2025   22:46:17   (  -0.00,-137.00) (  -0.79,-140.51)  399.81                80
 04/28/2025   22:30:13   (  -0.00,-137.00) (   0.21,-135.98)  115.52                80
 04/30/2025   10:52:04   (  -0.00,-136.99) (   0.98,-141.26)  487.87                80
 05/01/2025   10:30:41   (  -0.00,-136.98) (  -0.08,-136.75)   26.98                80
 05/03/2025   22:33:55   (   0.01,-136.96) (  -0.13,-137.52)   65.01                80
 05/04/2025   22:17:52   (   0.02,-136.95) (   0.88,-133.00)  449.70                80
 05/06/2025   10:39:42   (  -0.02,-136.93) (   0.30,-138.28)  154.16                80
 05/07/2025   10:18:19   (  -0.02,-136.92) (  -0.71,-133.75)  360.50                80