Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 7 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/09/2019   22:02:31   (   0.15,-127.54) (  -0.35,-129.64)  240.35                80
 07/10/2019   21:46:27   (   0.14,-127.50) (   0.66,-125.11)  272.04                80
 07/12/2019   10:05:35   (  -0.17,-127.45) (   0.51,-130.38)  335.08                80
 07/13/2019   09:49:31   (  -0.16,-127.40) (  -0.50,-125.85)  176.64                80
 07/14/2019   22:08:48   (   0.19,-127.32) (  -0.66,-131.16)  437.44                80
 07/15/2019   21:52:44   (   0.18,-127.27) (   0.35,-126.63)   74.44                80
 07/18/2019   09:53:06   (  -0.19,-127.17) (  -0.14,-127.36)   21.33                80
 07/19/2019   09:37:02   (  -0.18,-127.12) (  -1.15,-122.82)  489.99                80
 07/20/2019   21:56:18   (   0.20,-127.03) (  -0.06,-128.12)  124.87                80
 07/21/2019   21:40:14   (   0.19,-126.98) (   0.95,-123.59)  386.68                80