Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2025 7 13.  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)
 07/14/2025   10:46:44   (   0.01,-136.99) (   0.70,-139.98)  341.38                80
 07/15/2025   10:25:21   (   0.01,-136.99) (  -0.36,-135.47)  174.48                80
 07/16/2025   22:47:18   (  -0.01,-136.99) (  -0.83,-140.77)  430.69                80
 07/17/2025   22:31:13   (  -0.01,-136.98) (   0.17,-136.24)   84.81                80
 07/20/2025   10:34:16   (   0.02,-136.94) (   0.02,-136.97)    3.27                80
 07/22/2025   22:34:49   (  -0.02,-136.91) (  -0.19,-137.75)   95.56                80
 07/23/2025   22:18:45   (  -0.03,-136.89) (   0.82,-133.22)  418.88                80
 07/25/2025   10:40:32   (   0.03,-136.86) (   0.38,-138.49)  185.32                80
 07/26/2025   10:19:07   (   0.03,-136.84) (  -0.63,-133.95)  328.96                80