Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 3 28.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/29/2018   10:17:56   (   0.08,-134.66) (  -0.16,-133.62)  118.66                80
 03/30/2018   22:42:33   (  -0.08,-134.71) (  -1.02,-138.93)  480.45                80
 03/31/2018   22:21:09   (  -0.08,-134.75) (  -0.01,-134.40)   40.53                80
 04/03/2018   10:26:53   (   0.08,-134.88) (   0.12,-135.15)   30.51                80
 04/04/2018   10:05:29   (   0.08,-134.92) (  -0.89,-130.62)  490.23                80
 04/05/2018   22:30:06   (  -0.08,-134.96) (  -0.28,-135.93)  109.87                80
 04/06/2018   22:08:42   (  -0.08,-135.00) (   0.72,-131.40)  410.36                80
 04/08/2018   10:30:30   (   0.09,-135.06) (   0.45,-136.67)  182.71                80
 04/09/2018   10:14:26   (   0.09,-135.10) (  -0.56,-132.14)  337.29                80
 04/10/2018   22:36:23   (  -0.09,-135.13) (  -0.60,-137.45)  263.64                80