Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 10 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 10/19/2021   10:44:23   (   0.03,-137.20) (   0.63,-139.96)  314.49                80
 10/20/2021   10:28:19   (   0.03,-137.19) (  -0.37,-135.43)  201.05                80
 10/21/2021   22:47:37   (  -0.03,-137.18) (  -0.83,-140.74)  405.67                80
 10/22/2021   22:31:34   (  -0.03,-137.17) (   0.16,-136.21)  109.49                80
 10/24/2021   10:50:44   (   0.03,-137.16) (   1.01,-141.48)  492.98                80
 10/25/2021   10:34:42   (   0.03,-137.15) (  -0.04,-136.97)   21.74                80
 10/27/2021   22:35:17   (  -0.02,-137.11) (  -0.15,-137.74)   72.65                80
 10/28/2021   22:19:13   (  -0.02,-137.09) (   0.84,-133.21)  441.33                80
 10/30/2021   10:38:23   (   0.01,-137.06) (   0.33,-138.49)  162.62                80
 10/31/2021   10:22:20   (   0.01,-137.04) (  -0.67,-133.96)  351.05                80