Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 9 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/28/2015   10:39:56   (   0.27,-135.18) (   0.93,-138.11)  333.47                80
 09/29/2015   10:23:51   (   0.28,-135.16) (  -0.06,-133.57)  181.09                80
 09/30/2015   22:43:07   (  -0.26,-135.15) (  -1.10,-138.89)  425.63                80
 10/01/2015   22:27:02   (  -0.27,-135.14) (  -0.11,-134.35)   88.92                80
 10/04/2015   10:27:23   (   0.26,-135.07) (   0.27,-135.10)    3.57                80
 10/06/2015   22:30:34   (  -0.24,-135.02) (  -0.43,-135.88)   97.96                80
 10/07/2015   22:14:29   (  -0.25,-135.00) (   0.56,-131.34)  416.06                80
 10/09/2015   10:33:36   (   0.23,-134.95) (   0.58,-136.62)  190.68                80
 10/10/2015   10:17:31   (   0.24,-134.92) (  -0.41,-132.09)  322.81                80