Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 11 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 11/15/2021   10:38:45   (   0.01,-137.22) (   0.32,-138.54)  150.78                80
 11/16/2021   10:22:42   (   0.01,-137.22) (  -0.69,-134.01)  365.67                80
 11/17/2021   22:42:00   (  -0.01,-137.22) (  -0.49,-139.32)  239.87                80
 11/18/2021   22:25:56   (  -0.01,-137.22) (   0.52,-134.79)  276.18                80
 11/20/2021   10:45:07   (   0.01,-137.22) (   0.63,-140.07)  324.59                80
 11/21/2021   10:29:03   (   0.01,-137.22) (  -0.38,-135.54)  190.92                80
 11/22/2021   22:48:20   (  -0.01,-137.20) (  -0.86,-140.84)  416.16                80
 11/23/2021   22:32:18   (  -0.01,-137.19) (   0.21,-136.32)   98.95                80
 11/26/2021   10:35:24   (   0.01,-137.16) (  -0.02,-137.06)   11.56                80