Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 12 29.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/30/2019   09:58:45   (  -0.04,-128.27) (   0.07,-128.81)   61.16                80
 12/31/2019   09:42:40   (  -0.03,-128.29) (  -0.93,-124.27)  457.76                80
 01/01/2020   22:01:55   (   0.04,-128.28) (  -0.26,-129.57)  147.07                80
 01/02/2020   21:45:49   (   0.04,-128.30) (   0.75,-125.04)  371.57                80
 01/04/2020   10:04:57   (  -0.05,-128.36) (   0.38,-130.31)  222.87                80
 01/05/2020   09:48:51   (  -0.04,-128.37) (  -0.63,-125.78)  295.63                80
 01/06/2020   22:08:06   (   0.05,-128.36) (  -0.56,-131.08)  309.70                80
 01/07/2020   21:52:01   (   0.04,-128.37) (   0.45,-126.55)  208.20                80
 01/09/2020   10:11:07   (  -0.04,-128.41) (   0.74,-131.81)  387.88                80
 01/10/2020   09:55:02   (  -0.03,-128.42) (  -0.27,-127.27)  129.68                80
 01/11/2020   22:16:57   (   0.04,-128.40) (  -0.90,-132.58)  476.68                80