Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 6 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)
 06/13/2018   22:33:47   (   0.03,-134.52) (  -0.61,-137.41)  329.98                80
 06/14/2018   22:17:43   (   0.02,-134.57) (   0.42,-132.88)  192.23                80
 06/16/2018   10:36:51   (  -0.05,-134.63) (   0.72,-138.16)  402.03                80
 06/17/2018   10:20:45   (  -0.03,-134.67) (  -0.25,-133.62)  119.98                80
 06/18/2018   22:40:03   (   0.06,-134.76) (  -0.87,-138.93)  475.67                80
 06/19/2018   22:23:57   (   0.04,-134.80) (   0.10,-134.39)   46.28                80
 06/22/2018   10:24:21   (  -0.05,-134.90) (  -0.00,-135.14)   26.94                80
 06/23/2018   10:08:17   (  -0.04,-134.95) (  -1.03,-130.61)  494.59                80
 06/24/2018   22:27:33   (   0.07,-135.02) (  -0.14,-135.91)  101.95                80
 06/25/2018   22:11:28   (   0.06,-135.06) (   0.89,-131.39)  419.19                80
 06/27/2018   10:30:37   (  -0.09,-135.11) (   0.24,-136.66)  176.90                80