Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 8 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)
 08/11/2019   10:46:23   (  -0.04,-137.20) (   0.57,-139.88)  305.42                80
 08/12/2019   10:24:59   (  -0.04,-137.19) (  -0.45,-135.34)  210.20                80
 08/13/2019   22:46:56   (   0.05,-137.17) (  -0.71,-140.66)  396.90                80
 08/14/2019   22:30:52   (   0.05,-137.16) (   0.31,-136.12)  118.64                80
 08/16/2019   10:52:39   (  -0.05,-137.16) (   0.90,-141.39)  482.19                80
 08/17/2019   10:33:55   (  -0.05,-137.15) (  -0.12,-136.86)   33.05                80
 08/19/2019   22:34:26   (   0.06,-137.10) (  -0.07,-137.62)   59.74                80
 08/20/2019   22:18:22   (   0.06,-137.09) (   0.95,-133.09)  455.13                80
 08/22/2019   10:37:30   (  -0.06,-137.07) (   0.20,-138.37)  146.93                80
 08/23/2019   10:21:25   (  -0.06,-137.05) (  -0.76,-133.82)  367.35                80