Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2017 12 1.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/02/2017   10:15:07   (   0.02,-135.37) (  -0.69,-132.28)  352.80                80
 12/03/2017   22:34:22   (  -0.00,-135.30) (  -0.54,-137.57)  259.93                80
 12/04/2017   22:18:18   (  -0.01,-135.31) (   0.51,-133.05)  258.17                80
 12/06/2017   10:37:25   (  -0.01,-135.42) (   0.66,-138.32)  330.82                80
 12/07/2017   10:21:20   (   0.00,-135.43) (  -0.38,-133.79)  186.85                80
 12/08/2017   22:40:36   (   0.02,-135.35) (  -0.83,-139.09)  426.96                80
 12/09/2017   22:24:31   (   0.01,-135.36) (   0.21,-134.57)   90.61                80
 12/11/2017   10:43:39   (  -0.02,-135.46) (   0.96,-139.84)  498.89                80
 12/12/2017   10:27:33   (  -0.02,-135.47) (  -0.02,-135.30)   18.77                80
 12/14/2017   22:28:04   (   0.02,-135.39) (  -0.14,-136.07)   78.50                80