Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2017 8 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)
 08/28/2017   10:12:07   (   0.35,-135.07) (  -0.29,-132.06)  342.42                80
 08/29/2017   22:34:04   (  -0.35,-135.06) (  -0.89,-137.37)  263.96                80
 08/30/2017   22:18:01   (  -0.35,-135.06) (   0.14,-132.85)  252.04                80
 09/01/2017   10:39:50   (   0.34,-135.07) (   1.02,-138.12)  347.80                80
 09/02/2017   10:18:27   (   0.34,-135.06) (  -0.02,-133.60)  167.00                80
 09/03/2017   22:40:23   (  -0.34,-135.02) (  -1.23,-138.89)  442.10                80
 09/04/2017   22:24:19   (  -0.33,-135.01) (  -0.19,-134.37)   73.24                80
 09/07/2017   10:27:24   (   0.33,-135.01) (   0.37,-135.11)   12.13                80
 09/09/2017   22:27:57   (  -0.33,-134.93) (  -0.57,-135.88)  108.87                80