Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 2 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 02/10/2018   22:42:38   (   0.01,-135.36) (  -0.81,-138.98)  412.52                80
 02/11/2018   22:21:13   (   0.01,-135.38) (   0.19,-134.44)  105.77                80
 02/13/2018   10:45:39   (   0.00,-135.41) (   1.00,-139.70)  490.53                80
 02/14/2018   10:24:14   (   0.00,-135.42) (  -0.07,-135.18)   27.32                80
 02/16/2018   22:30:04   (  -0.00,-135.42) (  -0.10,-135.95)   59.74                80
 02/17/2018   22:08:39   (  -0.00,-135.43) (   0.91,-131.41)  457.59                80
 02/19/2018   10:33:05   (   0.00,-135.45) (   0.28,-136.68)  140.12                80
 02/20/2018   10:11:40   (  -0.00,-135.45) (  -0.73,-132.14)  376.75                80
 02/21/2018   22:36:15   (  -0.00,-135.43) (  -0.45,-137.44)  229.00                80
 02/22/2018   22:14:49   (  -0.00,-135.43) (   0.57,-132.91)  287.40                80