Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 10 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)
 10/01/2015   22:27:02   (  -0.27,-135.13) (  -0.08,-134.36)   88.70                80
 10/04/2015   10:30:04   (   0.26,-135.06) (   0.24,-135.10)    5.08                80
 10/06/2015   22:30:34   (  -0.24,-135.01) (  -0.46,-135.87)   98.36                80
 10/07/2015   22:14:29   (  -0.25,-134.99) (   0.59,-131.35)  415.71                80
 10/09/2015   10:33:36   (   0.23,-134.94) (   0.61,-136.62)  191.18                80
 10/10/2015   10:17:30   (   0.24,-134.91) (  -0.39,-132.08)  322.29                80
 10/11/2015   22:36:47   (  -0.21,-134.88) (  -0.77,-137.40)  287.25                80
 10/12/2015   22:20:41   (  -0.22,-134.85) (   0.23,-132.87)  226.33                80
 10/14/2015   10:39:47   (   0.20,-134.80) (   0.96,-138.13)  380.65                80