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)
 10/30/2017   10:31:15   (   0.13,-134.90) (   0.55,-136.74)  210.57                80
 10/31/2017   10:15:11   (   0.14,-134.86) (  -0.48,-132.22)  301.53                80
 11/01/2017   22:34:27   (  -0.11,-134.71) (  -0.71,-137.52)  319.40                80
 11/02/2017   22:18:22   (  -0.13,-134.67) (   0.26,-132.98)  192.76                80
 11/04/2017   10:37:29   (   0.10,-134.69) (   0.92,-138.25)  406.94                80
 11/05/2017   10:21:24   (   0.12,-134.64) (  -0.11,-133.73)  104.27                80
 11/07/2017   22:21:55   (  -0.10,-134.42) (  -0.11,-134.49)    8.03                80
 11/10/2017   10:24:58   (   0.09,-134.37) (   0.26,-135.24)   98.14                80
 11/11/2017   10:08:53   (   0.10,-134.31) (  -0.71,-130.70)  412.18                80
 11/12/2017   22:28:09   (  -0.07,-134.14) (  -0.47,-136.01)  212.46                80