Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 6 29.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/30/2015   10:28:59   (  -0.10,-134.78) (  -0.02,-135.24)   51.05                80
 07/01/2015   10:12:54   (  -0.09,-134.81) (  -1.02,-130.70)  468.85                80
 07/02/2015   22:32:10   (   0.11,-134.84) (  -0.13,-136.02)  133.73                80
 07/03/2015   22:16:04   (   0.10,-134.86) (   0.87,-131.48)  385.57                80
 07/05/2015   10:35:11   (  -0.12,-134.91) (   0.32,-136.75)  210.00                80
 07/06/2015   10:19:06   (  -0.11,-134.94) (  -0.74,-132.23)  309.19                80
 07/07/2015   22:38:22   (   0.13,-134.96) (  -0.46,-137.53)  293.96                80
 07/08/2015   22:22:16   (   0.12,-134.98) (   0.55,-133.00)  224.70                80
 07/10/2015   10:41:23   (  -0.14,-135.01) (   0.59,-138.28)  372.31                80
 07/11/2015   10:25:18   (  -0.13,-135.03) (  -0.41,-133.75)  146.12                80
 07/12/2015   22:44:34   (   0.16,-135.04) (  -0.72,-139.07)  457.67                80