Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 10 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 10/14/2018   22:28:06   (  -0.26,-135.56) (  -0.36,-135.93)   43.22                80
 10/15/2018   22:12:01   (  -0.27,-135.55) (   0.67,-131.41)  472.09                80
 10/17/2018   10:31:10   (   0.24,-135.57) (   0.46,-136.69)  126.82                80
 10/18/2018   10:15:04   (   0.25,-135.55) (  -0.51,-132.15)  387.69                80
 10/19/2018   22:34:20   (  -0.22,-135.48) (  -0.66,-137.46)  226.30                80
 10/20/2018   22:18:15   (  -0.23,-135.46) (   0.32,-132.92)  288.46                80
 10/22/2018   10:37:23   (   0.21,-135.49) (   0.81,-138.21)  310.19                80
 10/23/2018   10:21:18   (   0.22,-135.46) (  -0.16,-133.67)  203.80                80
 10/24/2018   22:40:34   (  -0.19,-135.36) (  -1.00,-138.98)  412.20                80
 10/25/2018   22:24:29   (  -0.21,-135.34) (  -0.03,-134.44)  101.80                80