Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 10 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 10/08/2018   22:40:36   (  -0.27,-135.61) (  -1.04,-138.94)  380.15                80
 10/09/2018   22:24:32   (  -0.28,-135.61) (  -0.01,-134.42)  136.24                80
 10/11/2018   10:43:40   (   0.26,-135.65) (   1.15,-139.70)  461.62                80
 10/12/2018   10:24:55   (   0.27,-135.64) (   0.18,-135.16)   53.89                80
 10/14/2018   22:28:06   (  -0.26,-135.57) (  -0.32,-135.95)   42.21                80
 10/15/2018   22:12:01   (  -0.27,-135.56) (   0.66,-131.41)  473.37                80
 10/17/2018   10:31:09   (   0.24,-135.59) (   0.48,-136.69)  125.45                80
 10/18/2018   10:15:04   (   0.25,-135.57) (  -0.49,-132.15)  389.25                80
 10/19/2018   22:34:20   (  -0.22,-135.50) (  -0.68,-137.46)  224.17                80
 10/20/2018   22:18:16   (  -0.23,-135.48) (   0.36,-132.94)  290.81                80
 10/22/2018   10:37:23   (   0.21,-135.51) (   0.84,-138.20)  307.81                80