Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2012 12 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/21/2012   22:31:54   (   0.09,-135.46) (  -0.39,-137.47)  229.88                80
 12/22/2012   22:15:50   (   0.08,-135.47) (   0.65,-132.95)  287.34                80
 12/24/2012   10:34:57   (  -0.09,-135.49) (   0.54,-138.21)  310.94                80
 12/25/2012   10:18:53   (  -0.08,-135.48) (  -0.51,-133.69)  205.59                80
 12/26/2012   22:38:08   (   0.09,-135.45) (  -0.70,-138.98)  402.08                80
 12/27/2012   22:22:03   (   0.08,-135.45) (   0.28,-134.44)  114.36                80
 12/29/2012   10:41:10   (  -0.09,-135.47) (   0.89,-139.71)  484.38                80
 12/30/2012   10:25:05   (  -0.08,-135.46) (  -0.16,-135.18)   31.42                80
 01/01/2013   22:25:35   (   0.09,-135.40) (  -0.06,-135.94)   62.14                80
 01/02/2013   22:09:31   (   0.08,-135.39) (   0.99,-131.41)  453.49                80