Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2014 12 28.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/28/2014   22:25:34   (   0.09,-135.27) (   0.58,-133.04)  253.97                80
 12/30/2014   10:44:39   (  -0.10,-135.28) (   0.59,-138.31)  345.20                80
 12/31/2014   10:28:33   (  -0.09,-135.26) (  -0.41,-133.77)  169.56                80
 01/01/2015   22:47:46   (   0.10,-135.19) (  -0.79,-139.07)  442.98                80
 01/02/2015   22:31:40   (   0.09,-135.17) (   0.21,-134.53)   71.69                80
 01/05/2015   10:31:59   (  -0.09,-135.15) (  -0.07,-135.27)   13.68                80
 01/07/2015   22:35:05   (   0.09,-135.04) (  -0.12,-136.03)  113.16                80
 01/08/2015   22:18:59   (   0.09,-135.01) (   0.89,-131.50)  400.86                80
 01/10/2015   10:38:03   (  -0.10,-135.01) (   0.31,-136.76)  199.37                80