Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2025 9 9.  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)
 09/09/2025   22:18:39   (   0.03,-137.00) (   0.89,-133.20)  433.39                80
 09/11/2025   10:40:27   (  -0.03,-137.00) (   0.30,-138.47)  167.77                80
 09/12/2025   10:19:01   (  -0.03,-137.00) (  -0.70,-133.93)  348.71                80
 09/13/2025   22:40:57   (   0.04,-137.00) (  -0.47,-139.23)  254.82                80
 09/14/2025   22:24:51   (   0.04,-136.99) (   0.53,-134.70)  261.17                80
 09/16/2025   10:46:38   (  -0.04,-136.97) (   0.65,-139.96)  341.38                80
 09/17/2025   10:25:14   (  -0.05,-136.97) (  -0.41,-135.44)  174.43                80
 09/18/2025   22:47:08   (   0.05,-136.96) (  -0.81,-140.73)  429.67                80
 09/19/2025   22:31:03   (   0.05,-136.96) (   0.19,-136.19)   86.27                80
 09/22/2025   10:34:05   (  -0.05,-136.93) (  -0.02,-136.92)    2.98                80