Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2025 9 25.  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)
 09/25/2025   22:18:29   (   0.02,-137.01) (   0.88,-133.15)  439.72                80
 09/27/2025   10:40:15   (  -0.02,-137.00) (   0.33,-138.41)  161.81                80
 09/28/2025   10:18:50   (  -0.02,-136.99) (  -0.69,-133.87)  354.32                80
 09/29/2025   22:43:25   (   0.01,-136.98) (  -0.46,-139.18)  250.05                80
 09/30/2025   22:22:00   (   0.02,-136.97) (   0.56,-134.64)  265.61                80
 10/02/2025   10:46:26   (  -0.02,-136.94) (   0.63,-139.91)  337.02                80
 10/03/2025   10:25:00   (  -0.02,-136.93) (  -0.40,-135.37)  178.33                80
 10/04/2025   22:46:55   (   0.02,-136.91) (  -0.80,-140.67)  427.11                80
 10/05/2025   22:30:48   (   0.02,-136.90) (   0.17,-136.12)   88.09                80
 10/08/2025   10:33:48   (   0.00,-136.84) (   0.02,-136.84)    1.66                80