Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 1 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)
 01/04/2019   21:52:49   (   0.04,-128.39) (   0.42,-126.69)  193.95                80
 01/06/2019   10:11:57   (  -0.05,-128.46) (   0.71,-131.97)  399.26                80
 01/07/2019   09:55:52   (  -0.04,-128.44) (  -0.27,-127.43)  114.97                80
 01/09/2019   21:59:02   (   0.05,-128.28) (   0.09,-128.20)    9.81                80
 01/12/2019   09:59:25   (  -0.06,-128.32) (   0.06,-128.94)   70.49                80
 01/13/2019   09:43:20   (  -0.05,-128.29) (  -0.92,-124.41)  443.25                80
 01/14/2019   22:02:35   (   0.06,-128.15) (  -0.29,-129.70)  177.18                80
 01/15/2019   21:46:30   (   0.05,-128.12) (   0.69,-125.16)  336.20                80
 01/17/2019   10:05:38   (  -0.06,-128.17) (   0.44,-130.44)  258.75                80