Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 11 6.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 11/07/2021   22:31:57   (  -0.02,-137.20) (   0.20,-136.27)  105.61                80
 11/09/2021   10:51:07   (   0.02,-137.19) (   1.01,-141.54)  496.43                80
 11/10/2021   10:35:04   (   0.02,-137.18) (  -0.05,-137.02)   18.86                80
 11/12/2021   22:35:39   (  -0.01,-137.15) (  -0.13,-137.80)   73.64                80
 11/13/2021   22:19:36   (  -0.01,-137.14) (   0.88,-133.27)  441.42                80
 11/15/2021   10:38:45   (   0.01,-137.13) (   0.33,-138.54)  160.90                80
 11/16/2021   10:22:41   (   0.01,-137.12) (  -0.68,-134.01)  353.90                80
 11/17/2021   22:42:00   (  -0.01,-137.09) (  -0.50,-139.32)  253.79                80
 11/18/2021   22:25:56   (  -0.01,-137.08) (   0.51,-134.79)  260.61                80
 11/20/2021   10:45:05   (   0.01,-137.06) (   0.70,-140.06)  342.89                80