Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2017 8 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/24/2017   22:27:46   (  -0.35,-135.06) (  -0.51,-135.86)   90.02                80
 08/25/2017   22:11:42   (  -0.35,-135.07) (   0.47,-131.32)  426.95                80
 08/27/2017   10:33:31   (   0.35,-135.08) (   0.70,-136.60)  172.98                80
 08/28/2017   10:12:08   (   0.35,-135.08) (  -0.34,-132.07)  342.74                80
 08/29/2017   22:34:05   (  -0.35,-135.07) (  -0.85,-137.38)  263.04                80
 08/30/2017   22:18:01   (  -0.35,-135.07) (   0.13,-132.84)  253.16                80
 09/01/2017   10:39:50   (   0.34,-135.08) (   1.04,-138.12)  346.72                80
 09/02/2017   10:18:26   (   0.34,-135.07) (   0.00,-133.60)  168.26                80
 09/03/2017   22:40:24   (  -0.33,-135.04) (  -1.18,-138.90)  440.17                80
 09/04/2017   22:24:19   (  -0.33,-135.03) (  -0.20,-134.37)   75.37                80