Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 11 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 11/16/2021   10:22:42   (   0.01,-137.22) (  -0.70,-134.01)  365.37                80
 11/17/2021   22:42:00   (  -0.01,-137.22) (  -0.48,-139.32)  240.16                80
 11/18/2021   22:25:56   (  -0.01,-137.21) (   0.53,-134.79)  275.78                80
 11/20/2021   10:45:06   (   0.01,-137.21) (   0.68,-140.06)  325.35                80
 11/21/2021   10:29:03   (   0.01,-137.21) (  -0.39,-135.55)  190.06                80
 11/22/2021   22:48:21   (  -0.01,-137.19) (  -0.85,-140.84)  417.06                80
 11/23/2021   22:32:17   (  -0.01,-137.18) (   0.16,-136.31)   97.90                80
 11/26/2021   10:35:24   (   0.01,-137.15) (  -0.03,-137.07)   10.33                80
 11/28/2021   22:35:58   (  -0.00,-137.10) (  -0.19,-137.83)   83.78                80
 11/29/2021   22:19:54   (  -0.00,-137.09) (   0.83,-133.31)  430.42                80