Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 3 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/23/2015   22:29:51   (   0.00,-134.89) (   0.11,-134.44)   51.30                80
 03/26/2015   10:32:51   (  -0.00,-134.82) (   0.07,-135.18)   40.11                80
 03/27/2015   10:11:25   (  -0.00,-134.78) (  -0.91,-130.64)  471.96                80
 03/28/2015   22:33:19   (  -0.00,-134.69) (  -0.27,-135.94)  141.93                80
 03/29/2015   22:17:13   (  -0.00,-134.65) (   0.71,-131.40)  370.29                80
 03/31/2015   10:38:59   (   0.01,-134.62) (   0.44,-136.67)  233.84                80
 04/01/2015   10:17:33   (   0.00,-134.57) (  -0.54,-132.13)  277.83                80
 04/02/2015   22:39:26   (  -0.00,-134.47) (  -0.69,-137.42)  337.30                80
 04/03/2015   22:23:20   (  -0.00,-134.42) (   0.36,-132.90)  174.41                80
 04/05/2015   10:45:06   (   0.00,-134.39) (   0.85,-138.16)  430.17                80