Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 5 29.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/29/2018   22:17:44   (  -0.04,-135.05) (   0.42,-132.90)  243.89                80
 05/31/2018   10:36:52   (   0.02,-134.96) (   0.74,-138.18)  366.55                80
 06/01/2018   10:20:47   (   0.03,-134.92) (  -0.23,-133.63)  146.02                80
 06/02/2018   22:40:04   (  -0.01,-134.89) (  -0.89,-138.95)  462.02                80
 06/03/2018   22:23:58   (  -0.02,-134.85) (   0.08,-134.41)   50.42                80
 06/06/2018   10:24:21   (   0.01,-134.71) (   0.11,-135.14)   48.51                80
 06/07/2018   10:08:16   (   0.03,-134.67) (  -0.86,-130.60)  463.35                80
 06/08/2018   22:27:32   (  -0.00,-134.63) (  -0.31,-135.90)  146.03                80
 06/09/2018   22:11:28   (  -0.01,-134.58) (   0.71,-131.37)  365.59                80
 06/11/2018   10:30:35   (  -0.01,-134.47) (   0.49,-136.63)  246.76                80
 06/12/2018   10:14:30   (  -0.00,-134.42) (  -0.54,-132.11)  264.09                80