Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 1 31.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/31/2018   22:27:35   (   0.03,-135.14) (  -0.18,-135.97)   95.53                80
 02/01/2018   22:11:30   (   0.03,-135.17) (   0.88,-131.45)  424.37                80
 02/03/2018   10:33:17   (  -0.03,-135.25) (   0.32,-136.71)  167.66                80
 02/04/2018   10:11:52   (  -0.03,-135.27) (  -0.74,-132.19)  351.92                80
 02/05/2018   22:36:27   (   0.02,-135.28) (  -0.50,-137.48)  251.22                80
 02/06/2018   22:15:02   (   0.02,-135.31) (   0.57,-132.96)  268.23                80
 02/08/2018   10:39:28   (  -0.02,-135.37) (   0.63,-138.22)  324.36                80
 02/09/2018   10:18:03   (  -0.01,-135.39) (  -0.38,-133.68)  194.75                80
 02/10/2018   22:42:38   (  -0.00,-135.39) (  -0.80,-138.98)  409.15                80
 02/11/2018   22:21:13   (  -0.01,-135.41) (   0.21,-134.45)  109.61                80
 02/13/2018   10:45:39   (   0.01,-135.47) (   0.99,-139.71)  484.13                80
 02/14/2018   10:24:15   (   0.01,-135.48) (  -0.08,-135.19)   34.18                80