Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 12 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/31/2019   09:42:39   (  -0.03,-128.29) (  -0.91,-124.27)  457.73                80
 01/01/2020   22:01:55   (   0.04,-128.28) (  -0.22,-129.58)  147.18                80
 01/02/2020   21:45:50   (   0.04,-128.30) (   0.79,-125.05)  371.46                80
 01/04/2020   10:04:56   (  -0.05,-128.35) (   0.40,-130.31)  223.01                80
 01/05/2020   09:48:51   (  -0.04,-128.37) (  -0.60,-125.77)  295.46                80
 01/06/2020   22:08:06   (   0.05,-128.36) (  -0.58,-131.08)  309.94                80
 01/07/2020   21:52:01   (   0.04,-128.37) (   0.43,-126.54)  207.94                80
 01/09/2020   10:11:08   (  -0.04,-128.41) (   0.70,-131.82)  388.14                80
 01/10/2020   09:55:02   (  -0.03,-128.41) (  -0.31,-127.28)  129.40                80
 01/11/2020   22:14:17   (   0.04,-128.39) (  -0.92,-132.57)  477.04                80
 01/12/2020   21:55:31   (   0.03,-128.39) (   0.09,-128.04)   39.98                80