Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 1 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/15/2015   10:44:08   (  -0.10,-134.80) (   0.68,-138.25)  392.67                80
 01/16/2015   10:28:01   (  -0.10,-134.76) (  -0.35,-133.71)  119.53                80
 01/17/2015   22:47:14   (   0.10,-134.64) (  -0.90,-139.00)  496.91                80
 01/18/2015   22:31:07   (   0.09,-134.60) (   0.13,-134.47)   15.00                80
 01/21/2015   10:31:24   (  -0.09,-134.51) (   0.08,-135.18)   77.25                80
 01/22/2015   10:12:38   (  -0.09,-134.46) (  -0.95,-130.65)  433.92                80
 01/23/2015   22:34:30   (   0.09,-134.33) (  -0.29,-135.94)  184.02                80
 01/24/2015   22:18:23   (   0.09,-134.28) (   0.74,-131.41)  327.12                80
 01/26/2015   10:40:08   (  -0.09,-134.24) (   0.43,-136.67)  277.05                80
 01/27/2015   10:18:40   (  -0.09,-134.18) (  -0.54,-132.13)  233.60                80