Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2025 6 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)
 06/15/2025   22:30:59   (   0.01,-137.00) (   0.18,-136.18)   92.88                80
 06/18/2025   10:31:23   (   0.00,-136.98) (   0.01,-136.92)    7.04                80
 06/20/2025   22:34:37   (   0.00,-136.97) (  -0.16,-137.70)   83.75                80
 06/21/2025   22:18:33   (   0.01,-136.96) (   0.83,-133.17)  431.08                80
 06/23/2025   10:37:41   (  -0.02,-136.93) (   0.34,-138.44)  173.06                80
 06/24/2025   10:21:36   (  -0.02,-136.91) (  -0.66,-133.91)  341.35                80
 06/25/2025   22:40:55   (   0.01,-136.89) (  -0.48,-139.23)  265.95                80
 06/26/2025   22:24:50   (   0.01,-136.87) (   0.51,-134.70)  248.38                80
 06/28/2025   10:43:58   (  -0.01,-136.84) (   0.70,-139.96)  356.14                80
 06/29/2025   10:27:53   (  -0.00,-136.82) (  -0.30,-135.43)  158.15                80