Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2017 10 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 10/15/2017   10:12:26   (   0.22,-135.32) (  -0.48,-132.17)  358.58                80
 10/16/2017   22:34:21   (  -0.19,-135.21) (  -0.68,-137.47)  257.92                80
 10/17/2017   22:18:15   (  -0.20,-135.19) (   0.28,-132.93)  257.13                80
 10/19/2017   10:37:22   (   0.18,-135.24) (   0.84,-138.21)  337.97                80
 10/20/2017   10:21:16   (   0.19,-135.22) (  -0.13,-133.66)  176.45                80
 10/21/2017   22:40:30   (  -0.17,-135.09) (  -1.05,-138.96)  441.58                80
 10/22/2017   22:24:24   (  -0.18,-135.07) (  -0.01,-134.43)   73.00                80
 10/25/2017   10:27:24   (   0.17,-135.09) (   0.16,-135.17)    8.60                80
 10/27/2017   22:27:51   (  -0.15,-134.91) (  -0.37,-135.92)  114.36                80