Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2025 9 10.  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)
 09/11/2025   10:40:27   (  -0.02,-136.99) (   0.30,-138.47)  167.95                80
 09/12/2025   10:19:01   (  -0.02,-136.99) (  -0.70,-133.93)  348.31                80
 09/13/2025   22:40:57   (   0.03,-136.99) (  -0.46,-139.23)  255.18                80
 09/14/2025   22:24:51   (   0.03,-136.98) (   0.53,-134.70)  260.63                80
 09/16/2025   10:46:38   (  -0.03,-136.96) (   0.65,-139.96)  342.50                80
 09/17/2025   10:25:13   (  -0.03,-136.95) (  -0.35,-135.43)  173.13                80
 09/18/2025   22:47:08   (   0.03,-136.95) (  -0.81,-140.73)  430.97                80
 09/19/2025   22:31:03   (   0.03,-136.94) (   0.19,-136.19)   84.75                80
 09/22/2025   10:34:05   (  -0.03,-136.90) (  -0.01,-136.92)    3.26                80