Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2017 10 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)
 10/26/2017   10:08:57   (   0.17,-135.04) (  -0.83,-130.70)  495.13                80
 10/27/2017   22:28:13   (  -0.14,-134.91) (  -0.37,-136.01)  124.14                80
 10/28/2017   22:12:07   (  -0.15,-134.88) (   0.60,-131.47)  388.61                80
 10/30/2017   10:31:16   (   0.13,-134.90) (   0.52,-136.75)  210.80                80
 10/31/2017   10:15:10   (   0.14,-134.85) (  -0.45,-132.21)  301.21                80
 11/01/2017   22:34:27   (  -0.11,-134.71) (  -0.75,-137.52)  319.93                80
 11/02/2017   22:18:21   (  -0.13,-134.67) (   0.23,-132.98)  192.14                80
 11/04/2017   10:37:29   (   0.10,-134.68) (   0.90,-138.26)  407.63                80
 11/05/2017   10:21:24   (   0.12,-134.63) (  -0.07,-133.72)  103.50                80
 11/07/2017   22:21:55   (  -0.11,-134.41) (  -0.14,-134.49)    9.14                80