Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 1 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/15/2018   22:27:44   (   0.04,-134.62) (  -0.29,-135.99)  157.19                80
 01/16/2018   22:11:38   (   0.04,-134.57) (   0.71,-131.45)  354.30                80
 01/18/2018   10:30:46   (  -0.04,-134.53) (   0.45,-136.72)  250.20                80
 01/19/2018   10:14:40   (  -0.04,-134.48) (  -0.55,-132.19)  261.11                80
 01/20/2018   22:36:36   (   0.05,-134.36) (  -0.63,-137.49)  355.54                80
 01/21/2018   22:15:10   (   0.04,-134.31) (   0.38,-132.95)  155.25                80
 01/23/2018   10:36:56   (  -0.05,-134.26) (   0.84,-138.21)  450.68                80
 01/24/2018   10:20:51   (  -0.04,-134.20) (  -0.16,-133.68)   59.91                80
 01/26/2018   22:24:00   (   0.04,-134.02) (  -0.07,-134.43)   47.55                80
 01/27/2018   22:02:34   (   0.03,-133.95) (   0.93,-129.89)  462.13                80
 01/29/2018   10:24:21   (  -0.03,-133.88) (   0.28,-135.15)  145.79                80