Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 7 1.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/01/2021   22:49:14   (  -0.03,-137.18) (  -0.79,-140.63)  392.81                80
 07/02/2021   22:27:49   (  -0.02,-137.18) (   0.19,-136.10)  122.87                80
 07/04/2021   10:52:19   (   0.02,-137.17) (   0.98,-141.37)  478.93                80
 07/05/2021   10:30:55   (   0.01,-137.17) (  -0.06,-136.85)   36.12                80
 07/07/2021   22:34:09   (   0.00,-137.14) (  -0.10,-137.63)   56.21                80
 07/08/2021   22:18:06   (   0.01,-137.12) (   0.94,-133.11)  458.23                80
 07/10/2021   10:39:54   (  -0.01,-137.10) (   0.28,-138.37)  145.30                80
 07/11/2021   10:18:30   (  -0.01,-137.08) (  -0.75,-133.85)  368.81                80
 07/12/2021   22:40:28   (   0.01,-137.05) (  -0.44,-139.15)  239.50                80
 07/13/2021   22:24:23   (   0.01,-137.03) (   0.54,-134.62)  274.43                80