Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 1 14.  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) (  -0.27,-135.99)  157.02                80
 01/16/2018   22:11:39   (   0.04,-134.57) (   0.73,-131.46)  354.48                80
 01/18/2018   10:30:46   (  -0.04,-134.53) (   0.43,-136.73)  249.90                80
 01/19/2018   10:14:41   (  -0.04,-134.48) (  -0.58,-132.19)  261.47                80
 01/20/2018   22:36:35   (   0.05,-134.37) (  -0.66,-137.48)  355.16                80
 01/21/2018   22:15:09   (   0.04,-134.31) (   0.34,-132.95)  155.64                80
 01/23/2018   10:36:57   (  -0.05,-134.26) (   0.82,-138.22)  450.15                80
 01/24/2018   10:20:51   (  -0.04,-134.21) (  -0.18,-133.68)   60.55                80
 01/26/2018   22:24:00   (   0.04,-134.02) (  -0.05,-134.43)   46.87                80
 01/27/2018   22:02:35   (   0.03,-133.96) (   0.96,-129.90)  462.84                80