Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 2 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 02/09/2018   10:18:04   (  -0.02,-135.36) (  -0.43,-133.69)  190.65                80
 02/10/2018   22:42:38   (   0.01,-135.36) (  -0.81,-138.98)  412.45                80
 02/11/2018   22:21:13   (   0.00,-135.38) (   0.20,-134.44)  105.89                80
 02/13/2018   10:45:39   (   0.01,-135.41) (   1.00,-139.70)  490.22                80
 02/14/2018   10:24:14   (   0.01,-135.42) (  -0.07,-135.18)   27.67                80
 02/16/2018   22:30:04   (  -0.00,-135.42) (  -0.10,-135.95)   59.48                80
 02/17/2018   22:08:39   (  -0.00,-135.43) (   0.91,-131.41)  457.91                80
 02/19/2018   10:33:05   (   0.00,-135.45) (   0.28,-136.68)  139.60                80
 02/20/2018   10:11:40   (   0.00,-135.45) (  -0.73,-132.14)  377.31                80
 02/21/2018   22:36:15   (  -0.00,-135.44) (  -0.44,-137.44)  228.53                80