Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 1 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/16/2020   09:42:28   (  -0.05,-128.43) (  -0.99,-124.25)  477.70                80
 01/17/2020   22:01:43   (   0.05,-128.43) (  -0.18,-129.55)  127.05                80
 01/18/2020   21:45:38   (   0.04,-128.43) (   0.83,-125.01)  389.89                80
 01/20/2020   10:04:44   (  -0.04,-128.44) (   0.36,-130.28)  209.43                80
 01/21/2020   09:48:39   (  -0.04,-128.43) (  -0.65,-125.74)  307.28                80
 01/22/2020   22:07:53   (   0.04,-128.42) (  -0.57,-131.03)  298.02                80
 01/23/2020   21:51:47   (   0.03,-128.42) (   0.44,-126.50)  218.35                80
 01/25/2020   10:10:55   (  -0.03,-128.42) (   0.69,-131.77)  381.94                80
 01/26/2020   09:54:48   (  -0.03,-128.41) (  -0.27,-127.23)  134.39                80
 01/27/2020   22:16:44   (   0.04,-128.40) (  -0.89,-132.53)  471.16                80
 01/28/2020   21:55:18   (   0.04,-128.39) (   0.13,-128.00)   44.87                80