Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2025 5 17.  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)
 05/19/2025   22:34:13   (   0.01,-136.99) (  -0.13,-137.60)   70.13                80
 05/20/2025   22:18:09   (   0.01,-136.98) (   0.90,-133.08)  445.12                80
 05/22/2025   10:39:59   (  -0.01,-136.96) (   0.30,-138.35)  158.30                80
 05/23/2025   10:18:35   (  -0.01,-136.95) (  -0.73,-133.83)  356.55                80
 05/24/2025   22:40:33   (   0.01,-136.94) (  -0.46,-139.14)  249.92                80
 05/25/2025   22:24:28   (   0.02,-136.92) (   0.51,-134.60)  264.37                80
 05/27/2025   10:46:18   (  -0.03,-136.89) (   0.62,-139.89)  340.74                80
 05/28/2025   10:27:34   (  -0.03,-136.87) (  -0.36,-135.35)  173.00                80
 05/29/2025   22:46:51   (   0.03,-136.84) (  -0.82,-140.66)  435.07                80
 05/30/2025   22:30:48   (   0.03,-136.82) (   0.21,-136.14)   78.64                80