Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 12 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/27/2019   21:58:23   (   0.03,-128.19) (   0.05,-128.07)   13.51                80
 12/30/2019   09:58:45   (  -0.04,-128.27) (   0.08,-128.81)   61.08                80
 12/31/2019   09:42:39   (  -0.03,-128.29) (  -0.93,-124.27)  457.92                80
 01/01/2020   22:01:55   (   0.04,-128.29) (  -0.26,-129.57)  146.78                80
 01/02/2020   21:45:49   (   0.04,-128.31) (   0.75,-125.04)  371.93                80
 01/04/2020   10:04:57   (  -0.05,-128.36) (   0.39,-130.31)  222.44                80
 01/05/2020   09:48:51   (  -0.04,-128.38) (  -0.62,-125.78)  296.12                80
 01/06/2020   22:08:06   (   0.05,-128.37) (  -0.56,-131.08)  309.06                80
 01/07/2020   21:52:01   (   0.04,-128.38) (   0.45,-126.54)  208.90                80
 01/09/2020   10:11:08   (  -0.04,-128.42) (   0.69,-131.82)  387.14                80
 01/10/2020   09:55:03   (  -0.03,-128.42) (  -0.31,-127.28)  130.49                80