Simultaneous Nadir Overpasses (SNOs) between GOES-18 and NOAA-21
TLE Epoch: 2023 10 20.  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)
 10/21/2023   22:32:08   (   0.00,-137.00) (  -0.09,-137.52)   58.81                80
 10/22/2023   22:16:04   (   0.00,-137.00) (   0.88,-132.99)  456.29                80
 10/24/2023   10:35:15   (  -0.00,-137.00) (   0.30,-138.27)  145.49                80
 10/25/2023   10:19:12   (  -0.00,-136.99) (  -0.73,-133.75)  369.45                80
 10/26/2023   22:38:32   (   0.00,-136.97) (  -0.45,-139.07)  238.46                80
 10/27/2023   22:22:28   (   0.00,-136.97) (   0.53,-134.54)  276.28                80
 10/29/2023   10:41:38   (   0.00,-136.96) (   0.65,-139.82)  326.18                80
 10/30/2023   10:25:36   (   0.00,-136.95) (  -0.39,-135.30)  188.15                80
 10/31/2023   22:44:54   (  -0.01,-136.92) (  -0.83,-140.61)  420.87                80
 11/01/2023   22:28:51   (  -0.02,-136.90) (   0.15,-136.08)   93.34                80