Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 3 24.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/25/2018   22:33:36   (  -0.07,-134.64) (  -0.70,-137.41)  315.51                80
 03/26/2018   22:17:32   (  -0.07,-134.59) (   0.30,-132.87)  195.74                80
 03/28/2018   10:39:20   (   0.08,-134.52) (   0.87,-138.15)  413.02                80
 03/29/2018   10:17:55   (   0.08,-134.47) (  -0.14,-133.61)   97.98                80
 03/31/2018   22:21:07   (  -0.08,-134.35) (  -0.09,-134.38)    3.89                80
 04/03/2018   10:26:51   (   0.08,-134.22) (   0.26,-135.12)  102.42                80
 04/04/2018   10:05:27   (   0.08,-134.16) (  -0.75,-130.59)  408.03                80
 04/05/2018   22:27:23   (  -0.08,-134.08) (  -0.47,-135.88)  205.70                80
 04/06/2018   22:11:18   (  -0.08,-134.02) (   0.53,-131.35)  304.50                80