Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2011 12 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/17/2011   10:33:43   (  -0.03,-136.83) (  -0.03,-136.85)    2.59                80
 12/18/2011   22:53:01   (   0.04,-138.06) (  -0.90,-142.21)  472.90                80
 12/19/2011   22:34:17   (   0.03,-138.77) (   0.27,-137.71)  120.43                80
 12/21/2011   10:58:46   (  -0.04,-139.68) (   0.73,-143.01)  380.65                80
 12/22/2011   10:37:22   (  -0.03,-140.36) (  -0.44,-138.51)  210.55                80
 12/23/2011   22:59:20   (   0.03,-141.57) (  -0.48,-143.87)  261.97                80
 12/24/2011   22:43:17   (   0.02,-142.27) (   0.69,-139.37)  330.55                80
 12/26/2011   11:05:05   (  -0.03,-143.18) (   0.30,-144.68)  170.50                80
 12/27/2011   10:43:42   (  -0.02,-143.86) (  -0.88,-140.18)  420.08                80
 12/28/2011   23:05:39   (   0.03,-145.06) (  -0.10,-145.52)   54.10                80