Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 7 5.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/05/2021   10:30:55   (   0.03,-137.17) (  -0.06,-136.85)   37.27                80
 07/07/2021   22:36:49   (  -0.02,-137.17) (  -0.10,-137.63)   51.85                80
 07/08/2021   22:15:24   (  -0.01,-137.17) (   0.88,-133.09)  463.95                80
 07/10/2021   10:39:54   (   0.01,-137.17) (   0.29,-138.37)  137.21                80
 07/11/2021   10:18:30   (   0.00,-137.16) (  -0.75,-133.84)  378.18                80
 07/12/2021   22:43:08   (  -0.01,-137.15) (  -0.44,-139.15)  228.23                80
 07/13/2021   22:21:43   (  -0.01,-137.14) (   0.53,-134.61)  287.05                80
 07/15/2021   10:46:12   (   0.02,-137.13) (   0.63,-139.89)  314.82                80
 07/16/2021   10:24:49   (   0.01,-137.11) (  -0.41,-135.37)  200.10                80
 07/17/2021   22:49:25   (  -0.01,-137.09) (  -0.84,-140.66)  407.51                80
 07/18/2021   22:28:02   (  -0.00,-137.07) (   0.19,-136.13)  106.67                80