Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 11 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 11/10/2021   10:35:04   (   0.02,-137.21) (  -0.02,-137.02)   21.51                80
 11/12/2021   22:35:38   (  -0.01,-137.19) (  -0.16,-137.80)   68.83                80
 11/13/2021   22:19:35   (  -0.01,-137.19) (   0.85,-133.27)  446.98                80
 11/15/2021   10:38:45   (   0.01,-137.19) (   0.30,-138.55)  153.99                80
 11/16/2021   10:22:42   (   0.01,-137.19) (  -0.70,-134.02)  361.62                80
 11/17/2021   22:42:00   (  -0.01,-137.17) (  -0.47,-139.33)  245.05                80
 11/18/2021   22:25:57   (  -0.01,-137.16) (   0.53,-134.80)  270.16                80
 11/20/2021   10:45:06   (   0.01,-137.15) (   0.67,-140.06)  331.98                80
 11/21/2021   10:29:02   (   0.01,-137.14) (  -0.34,-135.54)  182.69                80
 11/22/2021   22:48:21   (  -0.01,-137.11) (  -0.84,-140.85)  425.46                80
 11/23/2021   22:32:17   (  -0.01,-137.09) (   0.18,-136.32)   88.72                80