Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 8 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)
 08/22/2015   10:37:00   (   0.39,-134.81) (   0.78,-136.62)  205.57                80
 08/23/2015   10:15:34   (   0.39,-134.84) (  -0.25,-132.09)  314.30                80
 08/24/2015   22:37:29   (  -0.39,-134.89) (  -0.95,-137.39)  284.24                80
 08/25/2015   22:21:23   (  -0.38,-134.92) (   0.08,-132.86)  235.41                80
 08/27/2015   10:43:09   (   0.38,-134.96) (   1.09,-138.13)  361.33                80
 08/28/2015   10:21:44   (   0.38,-134.98) (   0.06,-133.60)  157.74                80
 08/29/2015   22:43:38   (  -0.37,-135.02) (  -1.25,-138.90)  442.41                80
 08/30/2015   22:27:33   (  -0.37,-135.04) (  -0.22,-134.37)   76.66                80
 09/02/2015   10:30:34   (   0.37,-135.09) (   0.36,-135.11)    2.63                80