Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 9 3.  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) (   1.17,-131.79)  393.20                80
 09/04/2019   09:53:07   (   0.37,-128.33) (   0.15,-127.26)  121.61                80
 09/05/2019   22:15:04   (  -0.37,-128.29) (  -1.34,-132.56)  487.62                80
 09/06/2019   21:58:59   (  -0.37,-128.27) (  -0.32,-128.03)   27.27                80
 09/09/2019   10:02:02   (   0.36,-128.25) (   0.50,-128.76)   58.93                80
 09/10/2019   09:40:38   (   0.36,-128.23) (  -0.52,-124.23)  455.37                80
 09/11/2019   22:02:34   (  -0.35,-128.18) (  -0.66,-129.54)  155.02                80
 09/12/2019   21:46:29   (  -0.35,-128.16) (   0.36,-125.01)  359.57                80
 09/14/2019   10:08:18   (   0.34,-128.16) (   0.79,-130.28)  241.14                80
 09/15/2019   09:46:52   (   0.35,-128.14) (  -0.18,-125.74)  272.97                80
 09/16/2019   22:08:49   (  -0.34,-128.07) (  -1.00,-131.04)  338.70                80