Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 9 1.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/03/2019   10:14:32   (   0.37,-128.35) (   1.14,-131.80)  393.23                80
 09/04/2019   09:53:08   (   0.37,-128.33) (   0.12,-127.27)  121.61                80
 09/05/2019   22:15:04   (  -0.37,-128.29) (  -1.31,-132.57)  487.44                80
 09/06/2019   21:59:00   (  -0.37,-128.28) (  -0.29,-128.04)   27.60                80
 09/09/2019   10:02:03   (   0.36,-128.26) (   0.47,-128.77)   58.64                80
 09/10/2019   09:40:38   (   0.36,-128.24) (  -0.55,-124.24)  455.62                80
 09/11/2019   22:02:34   (  -0.35,-128.18) (  -0.64,-129.54)  154.59                80
 09/12/2019   21:46:29   (  -0.35,-128.17) (   0.33,-125.00)  360.06                80
 09/14/2019   10:08:17   (   0.34,-128.16) (   0.82,-130.27)  240.72                80
 09/15/2019   09:46:53   (   0.35,-128.14) (  -0.20,-125.74)  273.40                80