Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 12 7.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/08/2019   10:11:29   (  -0.01,-128.22) (   0.80,-131.86)  414.77                80
 12/09/2019   09:55:23   (   0.00,-128.19) (  -0.20,-127.32)   99.22                80
 12/11/2019   21:55:53   (   0.00,-128.08) (  -0.01,-128.08)    0.91                80
 12/14/2019   09:58:55   (  -0.01,-128.03) (   0.15,-128.82)   89.80                80
 12/15/2019   09:42:49   (   0.00,-127.99) (  -0.85,-124.29)  423.04                80
 12/16/2019   22:02:05   (   0.02,-127.90) (  -0.34,-129.59)  191.70                80
 12/17/2019   21:45:59   (   0.01,-127.86) (   0.66,-125.05)  320.91                80
 12/19/2019   10:05:06   (  -0.03,-127.84) (   0.54,-130.31)  282.62                80
 12/20/2019   09:49:00   (  -0.02,-127.80) (  -0.46,-125.78)  229.81                80