Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2018 11 6.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 11/06/2018   21:59:07   (  -0.14,-128.59) (  -0.03,-128.12)   53.69                80
 11/07/2018   21:40:19   (  -0.16,-127.76) (   0.81,-123.55)  479.87                80
 11/09/2018   09:59:22   (   0.13,-126.34) (   0.64,-128.76)  275.27                80
 11/10/2018   09:43:14   (   0.13,-125.51) (  -0.15,-124.18)  151.35                80
 11/12/2018   21:43:40   (  -0.11,-123.56) (  -0.40,-124.88)  149.65                80
 11/13/2018   21:27:32   (  -0.12,-122.73) (   0.44,-120.31)  275.84                80
 11/15/2018   09:46:35   (   0.09,-121.28) (   1.05,-125.51)  482.73                80
 11/16/2018   09:27:47   (   0.10,-120.45) (   0.21,-120.95)   56.34                80
 11/17/2018   09:11:40   (   0.11,-119.62) (  -0.63,-116.38)  369.71                80
 11/18/2018   21:30:53   (  -0.07,-118.51) (  -0.75,-121.64)  356.04                80
 11/19/2018   21:14:44   (  -0.08,-117.67) (   0.04,-117.06)   69.21                80