Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2025 9 14.  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)
 09/14/2025   22:24:51   (   0.02,-137.00) (   0.51,-134.69)  262.49                80
 09/16/2025   10:46:38   (  -0.02,-136.97) (   0.67,-139.96)  341.04                80
 09/17/2025   10:25:14   (  -0.02,-136.96) (  -0.39,-135.43)  174.88                80
 09/18/2025   22:47:08   (   0.02,-136.97) (  -0.83,-140.72)  427.95                80
 09/19/2025   22:31:02   (   0.02,-136.96) (   0.17,-136.19)   88.14                80
 09/22/2025   10:31:24   (  -0.02,-136.93) (   0.01,-136.92)    2.90                80
 09/24/2025   22:34:34   (   0.02,-136.92) (  -0.16,-137.68)   87.79                80
 09/25/2025   22:18:29   (   0.02,-136.90) (   0.85,-133.15)  427.45                80
 09/27/2025   10:40:16   (  -0.01,-136.86) (   0.32,-138.42)  177.17                80
 09/28/2025   10:18:50   (  -0.01,-136.84) (  -0.69,-133.88)  337.47                80