Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2016 3 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/22/2016   10:40:29   (   0.02,-134.86) (   0.76,-138.09)  368.57                80
 03/23/2016   10:19:04   (   0.02,-134.89) (  -0.26,-133.56)  152.00                80
 03/24/2016   22:40:59   (  -0.02,-134.94) (  -0.90,-138.86)  447.23                80
 03/25/2016   22:24:54   (  -0.02,-134.97) (   0.12,-134.33)   73.29                80
 03/28/2016   10:27:54   (   0.02,-135.07) (   0.03,-135.07)    0.90                80
 03/30/2016   22:28:24   (  -0.02,-135.12) (  -0.15,-135.84)   81.25                80
 03/31/2016   22:12:18   (  -0.02,-135.15) (   0.81,-131.30)  438.32                80
 04/02/2016   10:34:04   (   0.03,-135.20) (   0.36,-136.56)  156.28                80
 04/03/2016   10:12:39   (   0.02,-135.22) (  -0.66,-132.03)  362.59                80