Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2016 4 25.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/25/2016   22:41:10   (  -0.06,-135.37) (  -0.89,-138.95)  409.47                80
 04/26/2016   22:25:06   (  -0.06,-135.36) (   0.12,-134.42)  105.85                80
 04/28/2016   10:46:54   (   0.06,-135.34) (   1.05,-139.70)  496.84                80
 04/29/2016   10:25:29   (   0.06,-135.33) (   0.04,-135.17)   17.80                80
 05/01/2016   22:28:41   (  -0.06,-135.28) (  -0.22,-135.94)   75.89                80
 05/02/2016   22:12:37   (  -0.07,-135.26) (   0.79,-131.41)  438.48                80
 05/04/2016   10:34:25   (   0.06,-135.24) (   0.38,-136.69)  165.40                80
 05/05/2016   10:13:01   (   0.07,-135.21) (  -0.63,-132.16)  348.25                80
 05/06/2016   22:34:57   (  -0.06,-135.16) (  -0.55,-137.47)  261.74                80
 05/07/2016   22:18:52   (  -0.06,-135.14) (   0.46,-132.94)  251.80                80