Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 10 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 10/11/2018   10:43:40   (   0.26,-135.64) (   1.17,-139.70)  462.89                80
 10/12/2018   10:27:36   (   0.27,-135.63) (   0.14,-135.17)   52.57                80
 10/14/2018   22:28:07   (  -0.26,-135.56) (  -0.35,-135.94)   44.44                80
 10/15/2018   22:12:02   (  -0.27,-135.55) (   0.67,-131.42)  470.97                80
 10/17/2018   10:31:10   (   0.24,-135.58) (   0.48,-136.70)  127.35                80
 10/18/2018   10:12:25   (   0.25,-135.56) (  -0.49,-132.16)  387.23                80
 10/19/2018   22:34:21   (  -0.22,-135.48) (  -0.69,-137.47)  227.10                80
 10/20/2018   22:18:17   (  -0.23,-135.46) (   0.34,-132.94)  287.77                80
 10/22/2018   10:37:25   (   0.21,-135.50) (   0.81,-138.22)  310.29                80
 10/23/2018   10:21:20   (   0.22,-135.48) (  -0.15,-133.68)  203.78                80