Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 5 28.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/28/2018   22:33:49   (  -0.03,-135.08) (  -0.56,-137.44)  269.21                80
 05/29/2018   22:17:44   (  -0.04,-135.05) (   0.46,-132.91)  243.84                80
 05/31/2018   10:36:52   (   0.02,-134.96) (   0.75,-138.17)  366.42                80
 06/01/2018   10:20:47   (   0.03,-134.92) (  -0.27,-133.64)  146.15                80
 06/02/2018   22:40:04   (  -0.01,-134.89) (  -0.90,-138.95)  461.92                80
 06/03/2018   22:23:58   (  -0.02,-134.85) (   0.06,-134.41)   50.57                80
 06/06/2018   10:24:21   (   0.01,-134.72) (   0.12,-135.14)   48.23                80
 06/07/2018   10:08:16   (   0.03,-134.67) (  -0.90,-130.61)  463.67                80
 06/08/2018   22:27:33   (  -0.00,-134.63) (  -0.27,-135.91)  145.77                80
 06/09/2018   22:11:27   (  -0.01,-134.58) (   0.70,-131.37)  365.87                80
 06/11/2018   10:30:36   (  -0.01,-134.48) (   0.45,-136.64)  246.33                80