Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 1 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/18/2015   22:31:07   (   0.09,-134.61) (   0.14,-134.47)   16.71                80
 01/21/2015   10:31:24   (  -0.09,-134.53) (   0.08,-135.18)   75.40                80
 01/22/2015   10:12:38   (  -0.09,-134.48) (  -0.95,-130.65)  435.94                80
 01/23/2015   22:34:31   (   0.09,-134.35) (  -0.24,-135.95)  181.47                80
 01/24/2015   22:18:24   (   0.09,-134.30) (   0.74,-131.41)  329.83                80
 01/26/2015   10:40:08   (  -0.09,-134.26) (   0.44,-136.67)  274.36                80
 01/27/2015   10:18:40   (  -0.09,-134.20) (  -0.54,-132.13)  236.45                80
 01/28/2015   22:40:34   (   0.09,-134.07) (  -0.64,-137.43)  382.16                80
 01/29/2015   22:24:26   (   0.08,-134.01) (   0.33,-132.88)  128.57                80
 01/31/2015   10:46:11   (  -0.08,-133.97) (   0.84,-138.15)  475.99                80