Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2016 11 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 11/19/2016   22:40:51   (  -0.03,-135.28) (  -0.87,-139.08)  432.72                80
 11/20/2016   22:24:46   (  -0.04,-135.30) (   0.16,-134.55)   85.67                80
 11/23/2016   10:27:49   (   0.03,-135.38) (   0.01,-135.30)    9.28                80
 11/25/2016   22:28:21   (  -0.02,-135.37) (  -0.17,-136.07)   80.55                80
 11/26/2016   22:12:15   (  -0.03,-135.38) (   0.80,-131.54)  437.27                80
 11/28/2016   10:31:24   (   0.01,-135.43) (   0.34,-136.82)  158.03                80
 11/29/2016   10:15:19   (   0.02,-135.44) (  -0.69,-132.29)  359.21                80
 11/30/2016   22:34:36   (  -0.00,-135.40) (  -0.48,-137.60)  250.05                80
 12/01/2016   22:18:30   (  -0.01,-135.40) (   0.49,-133.06)  266.88                80