Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NOAA-21
TLE Epoch: 2022 12 18.  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)
 12/19/2022   10:28:10   (  -0.01,-137.33) (  -0.28,-136.05)  145.57                80
 12/20/2022   22:46:44   (   0.01,-137.33) (  -0.72,-140.54)  367.02                80
 12/21/2022   22:28:26   (   0.01,-137.32) (   0.43,-135.47)  210.29                80
 12/23/2022   10:46:43   (  -0.00,-137.30) (   0.58,-139.89)  295.09                80
 12/24/2022   10:23:04   (   0.00,-137.29) (  -0.52,-134.81)  281.79                80
 12/25/2022   22:41:38   (  -0.01,-137.27) (  -0.49,-139.30)  232.56                80
 12/26/2022   22:23:20   (  -0.01,-137.25) (   0.67,-134.23)  344.13                80
 12/28/2022   10:41:36   (   0.02,-137.23) (   0.35,-138.64)  161.63                80
 12/29/2022   10:17:57   (   0.01,-137.21) (  -0.82,-133.58)  414.94                80
 12/30/2022   22:36:32   (  -0.02,-137.19) (  -0.20,-138.07)   99.87                80
 12/31/2022   22:18:12   (  -0.02,-137.17) (   0.92,-132.99)  476.56                80