Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 6 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/22/2015   22:22:24   (   0.06,-134.48) (   0.41,-132.96)  173.81                80
 06/24/2015   10:41:31   (  -0.08,-134.57) (   0.72,-138.24)  417.71                80
 06/25/2015   10:25:26   (  -0.07,-134.61) (  -0.27,-133.70)  103.27                80
 06/26/2015   22:44:42   (   0.09,-134.64) (  -0.88,-139.02)  498.23                80
 06/27/2015   22:28:37   (   0.08,-134.68) (   0.12,-134.48)   22.15                80
 06/30/2015   10:28:58   (  -0.09,-134.78) (   0.02,-135.23)   51.03                80
 07/01/2015   10:12:53   (  -0.09,-134.81) (  -0.98,-130.70)  468.83                80
 07/02/2015   22:32:09   (   0.11,-134.84) (  -0.16,-136.01)  134.23                80
 07/03/2015   22:16:04   (   0.10,-134.86) (   0.85,-131.48)  385.09                80
 07/05/2015   10:35:11   (  -0.12,-134.92) (   0.29,-136.76)  209.84                80