Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2011 12 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/19/2011   22:34:03   (   0.04,-134.62) (  -0.59,-137.52)  329.27                80
 12/20/2011   22:17:56   (   0.03,-134.64) (   0.40,-132.98)  189.19                80
 12/22/2011   10:37:01   (  -0.04,-134.71) (   0.77,-138.24)  403.04                80
 12/23/2011   10:20:56   (  -0.03,-134.72) (  -0.28,-133.72)  115.17                80
 12/24/2011   22:40:09   (   0.04,-134.69) (  -0.93,-139.01)  492.84                80
 12/25/2011   22:21:23   (   0.03,-134.69) (   0.06,-134.47)   25.02                80
 12/28/2011   10:24:23   (  -0.04,-134.77) (   0.04,-135.21)   50.40                80
 12/29/2011   10:08:16   (  -0.03,-134.77) (  -0.96,-130.68)  467.47                80
 12/30/2011   22:27:29   (   0.04,-134.73) (  -0.24,-135.97)  140.85                80
 12/31/2011   22:11:23   (   0.04,-134.74) (   0.76,-131.43)  376.55                80