Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 7 25.  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   22:27:40   (   0.24,-135.51) (   0.16,-135.95)   50.09                80
 07/27/2018   22:11:35   (   0.23,-135.50) (   1.13,-131.41)  465.69                80
 07/29/2018   10:30:45   (  -0.26,-135.47) (   0.00,-136.69)  139.53                80
 07/30/2018   10:14:40   (  -0.25,-135.46) (  -0.98,-132.16)  375.82                80
 07/31/2018   22:33:58   (   0.27,-135.46) (  -0.17,-137.47)  229.11                80
 08/01/2018   22:17:54   (   0.26,-135.45) (   0.81,-132.94)  286.12                80
 08/03/2018   10:37:03   (  -0.29,-135.41) (   0.33,-138.22)  319.72                80
 08/04/2018   10:20:59   (  -0.28,-135.39) (  -0.65,-133.68)  194.81                80
 08/05/2018   22:40:17   (   0.30,-135.38) (  -0.50,-139.00)  411.90                80
 08/06/2018   22:24:13   (   0.29,-135.36) (   0.49,-134.46)  102.20                80