Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 1 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/18/2018   10:30:46   (  -0.04,-134.53) (   0.44,-136.73)  250.21                80
 01/19/2018   10:14:40   (  -0.04,-134.48) (  -0.56,-132.19)  261.10                80
 01/20/2018   22:36:35   (   0.05,-134.36) (  -0.68,-137.48)  355.54                80
 01/21/2018   22:15:09   (   0.04,-134.31) (   0.33,-132.94)  155.24                80
 01/23/2018   10:36:57   (  -0.05,-134.26) (   0.83,-138.21)  450.68                80
 01/24/2018   10:20:51   (  -0.04,-134.20) (  -0.17,-133.68)   59.92                80
 01/26/2018   22:24:00   (   0.04,-134.02) (  -0.06,-134.43)   47.52                80
 01/27/2018   22:02:34   (   0.03,-133.95) (   0.94,-129.89)  462.14                80
 01/29/2018   10:24:21   (  -0.03,-133.88) (   0.27,-135.15)  145.76                80
 01/30/2018   10:08:15   (  -0.03,-133.81) (  -0.73,-130.62)  363.70                80