Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2023 1 6.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NOAA-21 Lat/Lon    Distance(km)  Time Diff(sec)
 01/06/2023   22:34:12   (  -0.03,-137.34) (  -0.05,-137.57)   26.80                80
 01/07/2023   22:18:06   (  -0.03,-137.33) (   0.92,-133.04)  489.34                80
 01/09/2023   10:39:54   (   0.03,-137.33) (   0.26,-138.31)  111.95                80
 01/10/2023   10:18:29   (   0.03,-137.32) (  -0.77,-133.78)  403.68                80
 01/11/2023   22:40:24   (  -0.04,-137.31) (  -0.46,-139.08)  202.45                80
 01/12/2023   22:24:20   (  -0.04,-137.30) (   0.58,-134.56)  313.04                80
 01/14/2023   10:46:07   (   0.04,-137.29) (   0.60,-139.83)  288.92                80
 01/15/2023   10:24:42   (   0.04,-137.28) (  -0.38,-135.29)  226.06                80
 01/16/2023   22:46:38   (  -0.05,-137.25) (  -0.77,-140.61)  381.46                80
 01/17/2023   22:30:33   (  -0.05,-137.24) (   0.21,-136.07)  132.99                80
 01/19/2023   10:52:20   (   0.06,-137.21) (   0.96,-141.34)  470.63                80
 01/20/2023   10:30:54   (   0.06,-137.18) (  -0.03,-136.81)   43.11                80