Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2017 10 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 10/31/2017   10:15:10   (   0.14,-134.86) (  -0.44,-132.21)  301.54                80
 11/01/2017   22:34:26   (  -0.11,-134.71) (  -0.75,-137.51)  319.17                80
 11/02/2017   22:18:22   (  -0.13,-134.67) (   0.28,-132.99)  193.05                80
 11/04/2017   10:37:29   (   0.10,-134.69) (   0.90,-138.26)  406.69                80
 11/05/2017   10:21:24   (   0.12,-134.64) (  -0.07,-133.72)  104.56                80
 11/07/2017   22:21:56   (  -0.10,-134.43) (  -0.09,-134.50)    8.11                80
 11/10/2017   10:24:57   (   0.09,-134.38) (   0.30,-135.23)   97.63                80
 11/11/2017   10:08:53   (   0.10,-134.32) (  -0.73,-130.70)  412.73                80
 11/12/2017   22:28:08   (  -0.07,-134.14) (  -0.51,-136.00)  211.77                80