Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2025 6 22.  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)
 06/23/2025   10:37:41   (  -0.02,-136.99) (   0.33,-138.44)  166.42                80
 06/24/2025   10:21:38   (  -0.02,-136.98) (  -0.72,-133.92)  348.89                80
 06/25/2025   22:40:55   (   0.02,-136.98) (  -0.49,-139.23)  256.70                80
 06/26/2025   22:24:50   (   0.02,-136.97) (   0.51,-134.69)  258.48                80
 06/28/2025   10:43:59   (  -0.01,-136.94) (   0.65,-139.97)  344.77                80
 06/29/2025   10:27:54   (   0.00,-136.93) (  -0.35,-135.44)  170.53                80
 06/30/2025   22:47:12   (  -0.01,-136.92) (  -0.86,-140.74)  435.11                80
 07/01/2025   22:31:07   (  -0.01,-136.91) (   0.14,-136.21)   79.94                80
 07/04/2025   10:31:31   (   0.01,-136.87) (   0.02,-136.95)    9.45                80