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) (   0.12,-134.46)   16.66                80
 01/21/2015   10:34:05   (  -0.09,-134.53) (   0.04,-135.19)   75.44                80
 01/22/2015   10:12:37   (  -0.09,-134.48) (  -0.93,-130.65)  435.87                80
 01/23/2015   22:34:31   (   0.09,-134.35) (  -0.25,-135.95)  181.51                80
 01/24/2015   22:18:23   (   0.09,-134.30) (   0.72,-131.40)  329.78                80
 01/26/2015   10:40:08   (  -0.09,-134.26) (   0.46,-136.67)  274.45                80
 01/27/2015   10:18:41   (  -0.09,-134.20) (  -0.58,-132.13)  236.38                80
 01/28/2015   22:40:33   (   0.09,-134.07) (  -0.66,-137.42)  382.23                80
 01/29/2015   22:24:26   (   0.08,-134.01) (   0.31,-132.88)  128.51                80
 01/31/2015   10:46:10   (  -0.08,-133.97) (   0.86,-138.14)  476.09                80