Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 5 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/31/2015   22:32:23   (  -0.01,-135.07) (  -0.23,-135.95)  101.09                80
 06/01/2015   22:16:19   (  -0.01,-135.04) (   0.81,-131.43)  411.84                80
 06/03/2015   10:35:26   (  -0.00,-135.00) (   0.36,-136.70)  193.43                80
 06/04/2015   10:19:21   (   0.00,-134.96) (  -0.62,-132.17)  318.98                80
 06/05/2015   22:38:37   (   0.01,-134.89) (  -0.56,-137.48)  294.54                80
 06/06/2015   22:22:31   (   0.00,-134.85) (   0.43,-132.94)  217.54                80
 06/08/2015   10:41:39   (  -0.02,-134.80) (   0.74,-138.21)  388.84                80
 06/09/2015   10:25:33   (  -0.01,-134.76) (  -0.24,-133.68)  122.90                80
 06/10/2015   22:44:49   (   0.02,-134.67) (  -0.93,-138.99)  491.70                80
 06/11/2015   22:28:44   (   0.02,-134.63) (   0.05,-134.45)   19.70                80