Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 6 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/04/2020   21:58:17   (   0.01,-128.02) (  -0.02,-128.03)    3.15                80
 06/07/2020   10:01:19   (  -0.00,-127.97) (   0.17,-128.77)   90.47                80
 06/08/2020   09:39:55   (  -0.02,-127.94) (  -0.87,-124.24)  422.66                80
 06/09/2020   22:01:50   (  -0.00,-127.88) (  -0.34,-129.53)  187.69                80
 06/10/2020   21:45:45   (   0.01,-127.85) (   0.64,-124.99)  325.96                80
 06/12/2020   10:07:32   (   0.01,-127.83) (   0.55,-130.26)  275.93                80
 06/13/2020   09:46:08   (   0.00,-127.80) (  -0.49,-125.73)  237.13                80
 06/14/2020   22:08:03   (  -0.02,-127.73) (  -0.73,-131.02)  374.32                80
 06/15/2020   21:51:57   (  -0.01,-127.70) (   0.25,-126.48)  139.00                80
 06/17/2020   10:13:45   (   0.02,-127.69) (   0.93,-131.75)  462.93                80
 06/18/2020   09:52:20   (   0.01,-127.65) (  -0.11,-127.22)   49.53                80