Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 10 6.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 10/06/2018   10:40:06   (   0.28,-135.66) (   0.83,-138.18)  286.71                80
 10/07/2018   10:18:40   (   0.29,-135.65) (  -0.14,-133.64)  229.36                80
 10/08/2018   22:40:36   (  -0.27,-135.62) (  -1.03,-138.95)  379.95                80
 10/09/2018   22:24:32   (  -0.28,-135.62) (  -0.00,-134.42)  136.53                80
 10/11/2018   10:43:40   (   0.26,-135.65) (   1.15,-139.70)  461.33                80
 10/12/2018   10:24:55   (   0.27,-135.64) (   0.17,-135.16)   54.26                80
 10/14/2018   22:28:07   (  -0.26,-135.58) (  -0.31,-135.95)   41.51                80
 10/15/2018   22:12:01   (  -0.27,-135.57) (   0.66,-131.41)  474.18                80
 10/17/2018   10:31:09   (   0.24,-135.60) (   0.48,-136.69)  124.63                80
 10/18/2018   10:15:04   (   0.25,-135.58) (  -0.49,-132.15)  390.14                80
 10/19/2018   22:34:20   (  -0.22,-135.51) (  -0.67,-137.46)  223.02                80