Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 6 24.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/25/2015   10:25:25   (  -0.07,-134.61) (  -0.25,-133.70)  103.35                80
 06/26/2015   22:44:42   (   0.09,-134.65) (  -0.91,-139.01)  497.99                80
 06/27/2015   22:28:37   (   0.08,-134.68) (   0.15,-134.49)   22.52                80
 06/30/2015   10:28:59   (  -0.09,-134.78) (  -0.01,-135.24)   51.07                80
 07/01/2015   10:12:54   (  -0.09,-134.81) (  -1.01,-130.70)  468.79                80
 07/02/2015   22:32:10   (   0.11,-134.84) (  -0.13,-136.02)  134.11                80
 07/03/2015   22:16:04   (   0.10,-134.86) (   0.87,-131.48)  385.20                80
 07/05/2015   10:35:12   (  -0.12,-134.92) (   0.27,-136.76)  210.00                80
 07/06/2015   10:19:06   (  -0.11,-134.94) (  -0.73,-132.23)  309.20                80
 07/07/2015   22:38:21   (   0.13,-134.96) (  -0.46,-137.53)  294.27                80