Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 7 24.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/26/2018   22:27:39   (   0.24,-135.51) (   0.14,-135.95)   50.14                80
 07/27/2018   22:11:36   (   0.23,-135.50) (   1.18,-131.42)  465.65                80
 07/29/2018   10:30:44   (  -0.26,-135.47) (   0.02,-136.69)  139.42                80
 07/30/2018   10:14:41   (  -0.25,-135.46) (  -1.02,-132.17)  375.96                80
 07/31/2018   22:33:58   (   0.27,-135.46) (  -0.19,-137.47)  229.07                80
 08/01/2018   22:17:55   (   0.26,-135.45) (   0.85,-132.95)  286.18                80
 08/03/2018   10:37:03   (  -0.29,-135.41) (   0.35,-138.21)  319.54                80
 08/04/2018   10:20:59   (  -0.28,-135.40) (  -0.68,-133.69)  195.03                80
 08/05/2018   22:40:17   (   0.30,-135.38) (  -0.52,-138.99)  411.77                80
 08/06/2018   22:24:13   (   0.29,-135.36) (   0.52,-134.47)  102.39                80