Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 1 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)
 01/14/2018   10:08:29   (  -0.04,-134.73) (  -0.94,-130.70)  459.11                80
 01/15/2018   22:27:45   (   0.04,-134.62) (  -0.24,-136.00)  156.95                80
 01/16/2018   22:11:39   (   0.04,-134.57) (   0.76,-131.46)  354.61                80
 01/18/2018   10:30:45   (  -0.04,-134.53) (   0.46,-136.72)  249.71                80
 01/19/2018   10:14:40   (  -0.04,-134.48) (  -0.54,-132.18)  261.67                80
 01/20/2018   22:36:35   (   0.04,-134.37) (  -0.64,-137.49)  354.97                80
 01/21/2018   22:15:10   (   0.04,-134.31) (   0.36,-132.95)  155.85                80
 01/23/2018   10:36:56   (  -0.05,-134.27) (   0.86,-138.21)  449.88                80
 01/24/2018   10:20:51   (  -0.04,-134.21) (  -0.14,-133.67)   60.83                80
 01/26/2018   22:24:00   (   0.04,-134.02) (  -0.03,-134.44)   46.66                80