Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 11 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 11/09/2021   10:51:07   (   0.02,-137.21) (   1.01,-141.54)  494.41                80
 11/10/2021   10:35:04   (   0.02,-137.20) (  -0.05,-137.02)   21.39                80
 11/12/2021   22:35:39   (  -0.01,-137.19) (  -0.13,-137.80)   69.58                80
 11/13/2021   22:19:36   (  -0.01,-137.18) (   0.88,-133.27)  446.06                80
 11/15/2021   10:38:45   (   0.01,-137.18) (   0.33,-138.54)  155.10                80
 11/16/2021   10:22:41   (   0.01,-137.18) (  -0.68,-134.01)  360.36                80
 11/17/2021   22:42:00   (  -0.01,-137.16) (  -0.50,-139.32)  246.57                80
 11/18/2021   22:25:56   (  -0.01,-137.15) (   0.51,-134.79)  268.45                80
 11/20/2021   10:45:06   (   0.01,-137.14) (   0.64,-140.07)  333.91                80
 11/21/2021   10:29:03   (   0.01,-137.12) (  -0.37,-135.54)  180.60                80
 11/22/2021   22:48:20   (  -0.00,-137.09) (  -0.85,-140.84)  427.82                80