Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 5 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/30/2020   21:49:24   (   0.03,-128.12) (   0.37,-126.54)  180.19                80
 06/01/2020   10:13:51   (  -0.00,-128.11) (   0.82,-131.80)  420.54                80
 06/02/2020   09:52:27   (  -0.02,-128.09) (  -0.22,-127.28)   93.34                80
 06/04/2020   21:55:37   (   0.01,-128.01) (   0.04,-128.04)    3.89                80
 06/07/2020   10:01:19   (  -0.01,-127.97) (   0.17,-128.77)   90.31                80
 06/08/2020   09:39:55   (  -0.02,-127.94) (  -0.87,-124.24)  422.87                80
 06/09/2020   22:01:50   (  -0.00,-127.88) (  -0.34,-129.53)  187.94                80
 06/10/2020   21:45:45   (   0.01,-127.85) (   0.64,-124.99)  325.70                80
 06/12/2020   10:07:32   (   0.01,-127.84) (   0.55,-130.26)  275.73                80