Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 10 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 10/09/2018   22:24:28   (  -0.28,-135.59) (  -0.05,-134.40)  134.96                80
 10/11/2018   10:43:37   (   0.26,-135.63) (   1.14,-139.69)  461.90                80
 10/12/2018   10:24:50   (   0.28,-135.62) (   0.19,-135.14)   53.80                80
 10/14/2018   22:28:00   (  -0.26,-135.54) (  -0.35,-135.92)   42.68                80
 10/15/2018   22:11:55   (  -0.27,-135.53) (   0.67,-131.39)  473.04                80
 10/17/2018   10:31:01   (   0.24,-135.57) (   0.51,-136.65)  124.57                80
 10/18/2018   10:14:55   (   0.25,-135.55) (  -0.51,-132.12)  390.41                80
 10/19/2018   22:34:10   (  -0.23,-135.46) (  -0.68,-137.42)  223.47                80
 10/20/2018   22:18:04   (  -0.24,-135.45) (   0.35,-132.89)  291.84                80
 10/22/2018   10:37:10   (   0.21,-135.48) (   0.81,-138.16)  305.32                80