Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 12 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/05/2019   22:08:27   (  -0.00,-128.24) (  -0.67,-131.11)  328.20                80
 12/06/2019   21:52:21   (  -0.01,-128.22) (   0.33,-126.58)  186.18                80
 12/08/2019   10:11:29   (  -0.01,-128.22) (   0.81,-131.85)  414.79                80
 12/09/2019   09:55:23   (   0.00,-128.19) (  -0.19,-127.32)   99.19                80
 12/11/2019   21:55:53   (  -0.00,-128.08) (  -0.01,-128.08)    1.40                80
 12/14/2019   09:58:55   (  -0.01,-128.03) (   0.15,-128.82)   89.98                80
 12/15/2019   09:42:49   (   0.00,-127.99) (  -0.85,-124.29)  422.85                80
 12/16/2019   22:02:05   (   0.02,-127.90) (  -0.34,-129.59)  192.14                80
 12/17/2019   21:45:59   (   0.01,-127.86) (   0.66,-125.05)  320.44                80