Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 11 8.  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) (   0.98,-141.55)  494.29                80
 11/10/2021   10:35:04   (   0.02,-137.21) (  -0.02,-137.02)   21.44                80
 11/12/2021   22:35:39   (  -0.01,-137.19) (  -0.15,-137.80)   69.15                80
 11/13/2021   22:19:35   (  -0.01,-137.19) (   0.85,-133.27)  446.54                80
 11/15/2021   10:38:45   (   0.01,-137.19) (   0.30,-138.55)  154.50                80
 11/16/2021   10:22:42   (   0.01,-137.18) (  -0.71,-134.02)  361.02                80
 11/17/2021   22:42:00   (  -0.01,-137.17) (  -0.46,-139.33)  245.78                80
 11/18/2021   22:25:57   (  -0.01,-137.16) (   0.55,-134.80)  269.35                80
 11/20/2021   10:45:06   (   0.01,-137.15) (   0.66,-140.07)  332.90                80
 11/21/2021   10:29:03   (   0.01,-137.13) (  -0.35,-135.54)  181.66                80