Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 7 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/31/2019   10:49:56   (  -0.03,-137.19) (   0.92,-141.39)  478.71                80
 08/01/2019   10:33:52   (  -0.03,-137.18) (  -0.09,-136.86)   36.82                80
 08/03/2019   22:34:25   (   0.04,-137.16) (  -0.05,-137.64)   54.29                80
 08/04/2019   22:18:20   (   0.04,-137.15) (   0.96,-133.10)  461.08                80
 08/06/2019   10:37:28   (  -0.04,-137.13) (   0.25,-138.37)  140.98                80
 08/07/2019   10:21:23   (  -0.04,-137.12) (  -0.77,-133.84)  374.00                80
 08/08/2019   22:40:40   (   0.05,-137.09) (  -0.39,-139.15)  233.53                80
 08/09/2019   22:24:36   (   0.05,-137.07) (   0.63,-134.62)  281.12                80
 08/11/2019   10:43:43   (  -0.05,-137.05) (   0.58,-139.88)  322.09                80
 08/12/2019   10:27:39   (  -0.06,-137.03) (  -0.43,-135.35)  192.13                80