Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 6 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/14/2018   22:17:43   (   0.02,-134.56) (   0.42,-132.88)  192.03                80
 06/16/2018   10:36:50   (  -0.05,-134.62) (   0.77,-138.15)  402.16                80
 06/17/2018   10:20:45   (  -0.03,-134.67) (  -0.26,-133.62)  119.80                80
 06/18/2018   22:40:03   (   0.06,-134.75) (  -0.86,-138.93)  476.08                80
 06/19/2018   22:23:57   (   0.04,-134.80) (   0.11,-134.39)   45.76                80
 06/22/2018   10:24:21   (  -0.05,-134.90) (  -0.01,-135.14)   27.39                80
 06/23/2018   10:08:17   (  -0.04,-134.94) (  -1.04,-130.61)  494.13                80
 06/24/2018   22:27:33   (   0.07,-135.02) (  -0.13,-135.92)  102.63                80
 06/25/2018   22:11:28   (   0.06,-135.06) (   0.90,-131.39)  418.46                80
 06/27/2018   10:30:36   (  -0.09,-135.10) (   0.29,-136.65)  177.57                80
 06/28/2018   10:14:31   (  -0.08,-135.14) (  -0.75,-132.12)  343.25                80