Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 12 3.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/04/2019   09:49:11   (   0.02,-128.31) (  -0.52,-125.81)  284.20                80
 12/05/2019   22:08:28   (  -0.00,-128.24) (  -0.62,-131.12)  328.23                80
 12/06/2019   21:52:22   (  -0.01,-128.22) (   0.37,-126.59)  186.14                80
 12/08/2019   10:11:28   (  -0.01,-128.22) (   0.82,-131.85)  414.76                80
 12/09/2019   09:55:23   (   0.00,-128.19) (  -0.17,-127.32)   99.26                80
 12/11/2019   21:55:53   (  -0.00,-128.08) (  -0.03,-128.08)    2.82                80
 12/14/2019   09:58:55   (  -0.01,-128.03) (   0.16,-128.82)   89.85                80
 12/15/2019   09:42:49   (   0.00,-127.99) (  -0.84,-124.28)  422.95                80
 12/16/2019   22:02:04   (   0.02,-127.90) (  -0.36,-129.58)  192.03                80