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

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 11/12/2017   22:28:11   (  -0.07,-134.70) (  -0.35,-136.03)  150.46                80
 11/13/2017   22:12:05   (  -0.08,-134.75) (   0.62,-131.49)  371.02                80
 11/15/2017   10:31:14   (   0.06,-134.91) (   0.49,-136.77)  212.74                80
 11/16/2017   10:15:09   (   0.07,-134.95) (  -0.55,-132.25)  308.33                80
 11/17/2017   22:34:25   (  -0.05,-134.91) (  -0.63,-137.55)  300.82                80
 11/18/2017   22:18:20   (  -0.06,-134.95) (   0.35,-133.01)  220.07                80
 11/20/2017   10:37:28   (   0.04,-135.10) (   0.76,-138.30)  364.44                80
 11/21/2017   10:21:24   (   0.05,-135.14) (  -0.27,-133.77)  155.88                80
 11/22/2017   22:40:40   (  -0.03,-135.09) (  -0.90,-139.08)  454.70                80
 11/23/2017   22:24:35   (  -0.04,-135.12) (   0.09,-134.54)   65.34                80