Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2025 9 13.  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)
 09/13/2025   22:40:57   (   0.02,-137.00) (  -0.46,-139.23)  253.86                80
 09/14/2025   22:24:51   (   0.02,-137.00) (   0.54,-134.70)  262.19                80
 09/16/2025   10:46:38   (  -0.02,-136.97) (   0.65,-139.96)  341.15                80
 09/17/2025   10:25:13   (  -0.02,-136.96) (  -0.35,-135.42)  174.69                80
 09/18/2025   22:47:08   (   0.02,-136.97) (  -0.81,-140.73)  428.53                80
 09/19/2025   22:31:03   (   0.02,-136.96) (   0.19,-136.19)   87.44                80
 09/22/2025   10:31:25   (  -0.02,-136.92) (  -0.02,-136.92)    0.10                80
 09/24/2025   22:34:34   (   0.02,-136.91) (  -0.14,-137.69)   88.84                80
 09/25/2025   22:18:29   (   0.02,-136.89) (   0.87,-133.15)  426.27                80
 09/27/2025   10:40:15   (  -0.01,-136.85) (   0.36,-138.41)  178.13                80