Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 3 26.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/26/2018   22:17:32   (  -0.07,-134.59) (   0.30,-132.87)  195.73                80
 03/28/2018   10:39:20   (   0.08,-134.52) (   0.86,-138.15)  413.23                80
 03/29/2018   10:17:55   (   0.08,-134.47) (  -0.14,-133.61)   97.76                80
 03/31/2018   22:21:07   (  -0.08,-134.35) (  -0.09,-134.38)    3.95                80
 04/03/2018   10:26:51   (   0.08,-134.21) (   0.25,-135.12)  102.77                80
 04/04/2018   10:05:27   (   0.08,-134.16) (  -0.75,-130.59)  407.67                80
 04/05/2018   22:27:23   (  -0.08,-134.07) (  -0.47,-135.88)  205.98                80
 04/06/2018   22:11:18   (  -0.08,-134.02) (   0.53,-131.35)  304.22                80
 04/08/2018   10:30:26   (   0.09,-133.93) (   0.69,-136.61)  306.30                80
 04/09/2018   10:14:21   (   0.09,-133.86) (  -0.31,-132.08)  203.44                80