Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 1 1.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/02/2019   09:49:38   (  -0.04,-128.54) (  -0.60,-125.92)  298.14                80
 01/03/2019   22:08:54   (   0.05,-128.41) (  -0.56,-131.23)  320.51                80
 01/04/2019   21:52:49   (   0.04,-128.40) (   0.42,-126.69)  194.21                80
 01/06/2019   10:11:57   (  -0.05,-128.47) (   0.71,-131.97)  398.71                80
 01/07/2019   09:55:51   (  -0.04,-128.45) (  -0.27,-127.43)  115.63                80
 01/09/2019   21:59:02   (   0.05,-128.29) (   0.09,-128.20)   10.52                80
 01/12/2019   09:59:25   (  -0.05,-128.33) (   0.06,-128.94)   69.20                80
 01/13/2019   09:43:20   (  -0.05,-128.31) (  -0.92,-124.41)  444.63                80
 01/14/2019   22:02:35   (   0.06,-128.16) (  -0.29,-129.70)  175.73                80