Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2025 6 9.  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)
 06/09/2025   22:40:46   (   0.02,-137.00) (  -0.47,-139.19)  249.55                80
 06/10/2025   22:24:41   (   0.02,-137.00) (   0.51,-134.66)  266.78                80
 06/12/2025   10:43:51   (  -0.01,-136.99) (   0.62,-139.94)  334.95                80
 06/13/2025   10:27:46   (  -0.01,-136.99) (  -0.36,-135.40)  180.97                80
 06/14/2025   22:47:03   (   0.00,-136.99) (  -0.84,-140.71)  424.17                80
 06/15/2025   22:31:00   (  -0.00,-136.98) (   0.20,-136.19)   91.56                80
 06/18/2025   10:34:04   (   0.01,-136.96) (  -0.01,-136.92)    4.42                80
 06/20/2025   22:34:37   (  -0.01,-136.94) (  -0.21,-137.70)   87.34                80
 06/21/2025   22:18:33   (  -0.01,-136.92) (   0.84,-133.17)  427.23                80
 06/23/2025   10:37:41   (  -0.00,-136.89) (   0.33,-138.45)  177.30                80