Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2017 11 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 11/20/2017   10:37:28   (   0.04,-135.08) (   0.78,-138.29)  366.49                80
 11/21/2017   10:21:24   (   0.05,-135.11) (  -0.26,-133.77)  153.45                80
 11/22/2017   22:40:40   (  -0.03,-135.06) (  -0.92,-139.08)  457.52                80
 11/23/2017   22:24:34   (  -0.04,-135.09) (   0.06,-134.54)   62.13                80
 11/26/2017   10:27:38   (   0.03,-135.25) (   0.01,-135.30)    5.64                80
 11/28/2017   22:28:09   (  -0.02,-135.20) (  -0.20,-136.07)   97.94                80
 11/29/2017   22:12:04   (  -0.03,-135.22) (   0.78,-131.53)  420.85                80
 12/01/2017   10:31:12   (   0.01,-135.35) (   0.33,-136.81)  166.74                80
 12/02/2017   10:15:06   (   0.02,-135.36) (  -0.65,-132.27)  351.52                80