Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2017 11 12.  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   22:28:10   (  -0.07,-134.70) (  -0.38,-136.02)  150.41                80
 11/13/2017   22:12:06   (  -0.08,-134.75) (   0.65,-131.49)  371.01                80
 11/15/2017   10:31:14   (   0.06,-134.91) (   0.46,-136.78)  212.93                80
 11/16/2017   10:15:09   (   0.07,-134.94) (  -0.52,-132.24)  308.09                80
 11/17/2017   22:34:25   (  -0.05,-134.91) (  -0.66,-137.55)  301.02                80
 11/18/2017   22:18:20   (  -0.06,-134.95) (   0.37,-133.02)  219.81                80
 11/20/2017   10:37:29   (   0.04,-135.10) (   0.74,-138.30)  364.89                80
 11/21/2017   10:21:23   (   0.05,-135.13) (  -0.24,-133.77)  155.37                80
 11/22/2017   22:40:40   (  -0.03,-135.08) (  -0.93,-139.07)  455.13                80
 11/23/2017   22:24:35   (  -0.04,-135.11) (   0.11,-134.55)   64.88                80
 11/26/2017   10:27:38   (   0.03,-135.28) (   0.03,-135.29)    1.44                80