Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 11 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 11/13/2021   22:19:36   (  -0.01,-137.21) (   0.90,-133.28)  448.86                80
 11/15/2021   10:38:45   (   0.01,-137.22) (   0.31,-138.54)  150.66                80
 11/16/2021   10:22:42   (   0.01,-137.23) (  -0.70,-134.01)  365.83                80
 11/17/2021   22:42:00   (  -0.01,-137.22) (  -0.48,-139.32)  239.70                80
 11/18/2021   22:25:56   (  -0.01,-137.22) (   0.53,-134.79)  276.39                80
 11/20/2021   10:45:07   (   0.01,-137.22) (   0.62,-140.08)  324.26                80
 11/21/2021   10:29:03   (   0.01,-137.22) (  -0.39,-135.55)  191.33                80
 11/22/2021   22:48:21   (  -0.01,-137.20) (  -0.84,-140.84)  415.73                80
 11/23/2021   22:32:17   (  -0.01,-137.19) (   0.17,-136.31)   99.38                80
 11/26/2021   10:35:24   (   0.01,-137.17) (  -0.04,-137.07)   12.44                80