Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 8 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)
 08/31/2019   22:08:49   (  -0.37,-128.36) (  -0.99,-131.06)  308.64                80
 09/01/2019   21:52:45   (  -0.37,-128.35) (   0.03,-126.53)  206.92                80
 09/03/2019   10:14:32   (   0.37,-128.35) (   1.17,-131.79)  393.30                80
 09/04/2019   09:53:07   (   0.37,-128.33) (   0.15,-127.26)  121.58                80
 09/05/2019   22:15:04   (  -0.37,-128.29) (  -1.34,-132.56)  487.26                80
 09/06/2019   21:58:59   (  -0.37,-128.28) (  -0.32,-128.03)   27.71                80
 09/09/2019   10:02:03   (   0.36,-128.26) (   0.45,-128.78)   58.62                80
 09/10/2019   09:40:38   (   0.36,-128.24) (  -0.52,-124.24)  455.75                80
 09/11/2019   22:02:34   (  -0.35,-128.19) (  -0.67,-129.54)  154.24                80
 09/12/2019   21:46:29   (  -0.35,-128.17) (   0.36,-125.01)  360.42                80