Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 9 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/09/2019   10:02:03   (   0.36,-128.25) (   0.47,-128.77)   59.52                80
 09/10/2019   09:40:38   (   0.36,-128.22) (  -0.55,-124.24)  454.37                80
 09/11/2019   22:02:34   (  -0.35,-128.16) (  -0.64,-129.54)  156.67                80
 09/12/2019   21:46:29   (  -0.35,-128.14) (   0.33,-125.00)  357.65                80
 09/14/2019   10:08:17   (   0.34,-128.14) (   0.82,-130.27)  243.29                80
 09/15/2019   09:46:53   (   0.35,-128.11) (  -0.21,-125.74)  270.47                80
 09/16/2019   22:08:48   (  -0.34,-128.04) (  -1.03,-131.03)  341.95                80
 09/17/2019   21:52:44   (  -0.34,-128.01) (  -0.01,-126.50)  171.93                80
 09/19/2019   10:14:17   (   0.33,-128.01) (   1.16,-131.78)  429.31                65
 09/20/2019   09:53:06   (   0.34,-127.97) (   0.19,-127.23)   83.72                80