Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 12 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/11/2019   21:58:33   (   0.00,-128.09) (   0.01,-128.09)    0.98                80
 12/14/2019   09:58:54   (  -0.01,-128.03) (   0.18,-128.81)   89.23                80
 12/15/2019   09:42:49   (   0.00,-128.00) (  -0.82,-124.28)  423.72                80
 12/16/2019   22:02:04   (   0.02,-127.91) (  -0.38,-129.58)  190.32                80
 12/17/2019   21:45:59   (   0.01,-127.88) (   0.62,-125.04)  322.49                80
 12/19/2019   10:05:06   (  -0.03,-127.85) (   0.52,-130.32)  281.22                80
 12/20/2019   09:49:00   (  -0.02,-127.81) (  -0.48,-125.78)  231.36                80
 12/21/2019   22:08:16   (   0.03,-127.72) (  -0.71,-131.08)  383.23                80
 12/22/2019   21:52:10   (   0.02,-127.68) (   0.29,-126.55)  129.18                80
 12/24/2019   10:11:17   (  -0.04,-127.64) (   0.91,-131.81)  475.07                80
 12/25/2019   09:55:11   (  -0.03,-127.60) (  -0.10,-127.27)   36.94                80