Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 7 31.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/01/2019   10:33:52   (  -0.03,-137.21) (  -0.11,-136.86)   39.53                80
 08/03/2019   22:34:25   (   0.04,-137.20) (  -0.03,-137.64)   49.18                80
 08/04/2019   22:18:21   (   0.03,-137.20) (   0.98,-133.11)  467.16                80
 08/06/2019   10:37:28   (  -0.04,-137.20) (   0.23,-138.37)  133.54                80
 08/07/2019   10:21:23   (  -0.04,-137.19) (  -0.78,-133.84)  382.37                80
 08/08/2019   22:40:41   (   0.04,-137.18) (  -0.37,-139.15)  223.65                80
 08/09/2019   22:24:36   (   0.05,-137.17) (   0.64,-134.62)  291.91                80
 08/11/2019   10:43:44   (  -0.05,-137.16) (   0.57,-139.88)  309.97                80
 08/12/2019   10:27:39   (  -0.05,-137.15) (  -0.45,-135.35)  205.19                80
 08/13/2019   22:46:56   (   0.06,-137.13) (  -0.70,-140.66)  401.91                80