Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 10 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 10/14/2018   22:28:06   (  -0.26,-135.56) (  -0.35,-135.94)   43.32                80
 10/15/2018   22:12:01   (  -0.27,-135.55) (   0.68,-131.41)  471.91                80
 10/17/2018   10:31:09   (   0.24,-135.57) (   0.51,-136.68)  127.02                80
 10/18/2018   10:15:04   (   0.25,-135.55) (  -0.52,-132.15)  387.43                80
 10/19/2018   22:34:21   (  -0.22,-135.47) (  -0.65,-137.47)  226.74                80
 10/20/2018   22:18:15   (  -0.23,-135.45) (   0.33,-132.93)  287.97                80
 10/22/2018   10:37:23   (   0.21,-135.48) (   0.80,-138.21)  310.69                80
 10/23/2018   10:21:18   (   0.22,-135.46) (  -0.17,-133.67)  203.24                80
 10/24/2018   22:40:34   (  -0.19,-135.36) (  -0.99,-138.98)  412.92                80
 10/25/2018   22:24:29   (  -0.21,-135.33) (  -0.01,-134.44)  101.01                80
 10/27/2018   10:43:37   (   0.18,-135.35) (   1.14,-139.73)  498.15                80