Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 3 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/19/2018   10:05:24   (   0.05,-134.91) (  -0.93,-130.61)  491.23                80
 03/20/2018   22:27:20   (  -0.06,-134.86) (  -0.31,-135.90)  118.99                80
 03/21/2018   22:11:16   (  -0.05,-134.82) (   0.69,-131.37)  392.86                80
 03/23/2018   10:33:04   (   0.06,-134.75) (   0.48,-136.64)  215.71                80
 03/24/2018   10:11:40   (   0.06,-134.70) (  -0.52,-132.11)  295.55                80
 03/25/2018   22:33:36   (  -0.07,-134.63) (  -0.72,-137.40)  316.29                80
 03/26/2018   22:17:31   (  -0.07,-134.59) (   0.28,-132.87)  194.75                80
 03/28/2018   10:39:20   (   0.07,-134.50) (   0.89,-138.14)  414.77                80
 03/29/2018   10:17:55   (   0.07,-134.45) (  -0.11,-133.61)   95.98                80
 03/31/2018   22:23:47   (  -0.08,-134.33) (  -0.11,-134.37)    6.66                80