Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2015 5 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/23/2015   10:41:44   (   0.03,-135.31) (   0.66,-138.19)  328.47                80
 05/24/2015   10:25:39   (   0.03,-135.29) (  -0.31,-133.65)  185.87                80
 05/25/2015   22:44:55   (  -0.02,-135.24) (  -0.87,-138.97)  425.22                80
 05/26/2015   22:28:50   (  -0.03,-135.21) (   0.17,-134.44)   88.85                80
 05/29/2015   10:29:12   (   0.02,-135.18) (   0.03,-135.18)    0.27                80
 05/31/2015   22:32:23   (  -0.01,-135.09) (  -0.22,-135.95)   99.00                80
 06/01/2015   22:16:19   (  -0.02,-135.06) (   0.82,-131.43)  414.03                80
 06/03/2015   10:35:26   (   0.00,-135.03) (   0.35,-136.70)  190.34                80
 06/04/2015   10:19:20   (   0.01,-134.99) (  -0.64,-132.17)  322.29                80