Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 2 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)
 02/10/2021   10:51:53   (  -0.03,-137.22) (   0.90,-141.34)  470.59                80
 02/11/2021   10:30:28   (  -0.02,-137.22) (  -0.12,-136.82)   46.07                80
 02/13/2021   22:36:19   (   0.01,-137.22) (  -0.08,-137.58)   41.05                80
 02/14/2021   22:14:55   (   0.02,-137.22) (   0.94,-133.05)  475.31                80
 02/16/2021   10:39:23   (  -0.01,-137.22) (   0.21,-138.33)  126.23                80
 02/17/2021   10:17:58   (  -0.02,-137.21) (  -0.76,-133.79)  389.78                80
 02/18/2021   22:39:54   (   0.01,-137.21) (  -0.41,-139.09)  214.82                80
 02/19/2021   22:23:49   (   0.01,-137.20) (   0.62,-134.57)  300.85                80
 02/21/2021   10:45:37   (   0.00,-137.18) (   0.59,-139.83)  301.82                80
 02/22/2021   10:24:12   (   0.00,-137.17) (  -0.44,-135.30)  213.28                80
 02/23/2021   22:46:07   (  -0.00,-137.15) (  -0.78,-140.60)  393.07                80