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)
 11/06/2021   22:48:00   (  -0.02,-137.20) (  -0.85,-140.79)  409.78                80
 11/07/2021   22:31:57   (  -0.02,-137.20) (   0.21,-136.28)  105.64                80
 11/09/2021   10:51:07   (   0.02,-137.19) (   1.01,-141.54)  496.47                80
 11/10/2021   10:35:03   (   0.02,-137.18) (   0.00,-137.01)   18.76                80
 11/12/2021   22:35:38   (  -0.01,-137.15) (  -0.18,-137.79)   73.63                80
 11/13/2021   22:19:36   (  -0.01,-137.14) (   0.88,-133.28)  441.41                80
 11/15/2021   10:38:45   (   0.01,-137.13) (   0.33,-138.54)  160.98                80
 11/16/2021   10:22:41   (   0.01,-137.12) (  -0.68,-134.01)  353.82                80
 11/17/2021   22:42:00   (  -0.01,-137.09) (  -0.50,-139.32)  253.83                80
 11/18/2021   22:25:56   (  -0.01,-137.08) (   0.51,-134.79)  260.56                80