Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 11 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 11/21/2015   10:29:44   (   0.02,-135.47) (  -0.02,-135.23)   26.76                80
 11/23/2015   22:30:15   (  -0.02,-135.46) (  -0.16,-136.01)   63.03                80
 11/24/2015   22:14:10   (  -0.03,-135.46) (   0.88,-131.48)  453.96                80
 11/26/2015   10:33:17   (   0.01,-135.48) (   0.30,-136.76)  145.51                80
 11/27/2015   10:17:12   (   0.02,-135.48) (  -0.69,-132.22)  370.72                80
 11/28/2015   22:36:28   (   0.00,-135.45) (  -0.46,-137.53)  237.60                80
 11/29/2015   22:20:23   (  -0.01,-135.45) (   0.53,-133.00)  278.73                80
 12/01/2015   10:39:31   (  -0.02,-135.47) (   0.59,-138.28)  320.83                80
 12/02/2015   10:23:26   (  -0.01,-135.46) (  -0.40,-133.75)  194.99                80
 12/03/2015   22:42:41   (   0.03,-135.42) (  -0.80,-139.05)  414.45                80