Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 1 17.  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) (   0.42,-136.73)  250.17                80
 01/19/2018   10:14:41   (  -0.04,-134.48) (  -0.58,-132.19)  261.18                80
 01/20/2018   22:36:35   (   0.05,-134.36) (  -0.66,-137.48)  355.46                80
 01/21/2018   22:15:10   (   0.05,-134.31) (   0.35,-132.95)  155.30                80
 01/23/2018   10:36:57   (  -0.05,-134.26) (   0.81,-138.22)  450.58                80
 01/24/2018   10:20:51   (  -0.05,-134.20) (  -0.19,-133.68)   60.11                80
 01/26/2018   22:24:00   (   0.04,-134.02) (  -0.04,-134.43)   47.40                80
 01/27/2018   22:02:35   (   0.03,-133.95) (   0.96,-129.90)  462.27                80
 01/29/2018   10:24:21   (  -0.03,-133.88) (   0.26,-135.16)  145.59                80
 01/30/2018   10:08:16   (  -0.03,-133.81) (  -0.75,-130.62)  363.85                80