Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 7 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/20/2020   09:52:37   (   0.00,-128.41) (  -0.27,-127.28)  129.99                80
 07/21/2020   22:14:33   (  -0.01,-128.37) (  -0.98,-132.57)  479.13                80
 07/22/2020   21:58:29   (  -0.01,-128.38) (   0.07,-128.05)   37.67                80
 07/25/2020   10:01:34   (   0.01,-128.44) (   0.07,-128.79)   40.51                80
 07/26/2020   09:40:10   (   0.01,-128.44) (  -0.92,-124.26)  475.87                80
 07/27/2020   22:02:07   (  -0.02,-128.39) (  -0.27,-129.57)  134.28                80
 07/28/2020   21:46:03   (  -0.02,-128.38) (   0.72,-125.03)  381.87                80
 07/30/2020   10:07:51   (   0.02,-128.43) (   0.47,-130.30)  213.72                80
 07/31/2020   09:46:27   (   0.03,-128.42) (  -0.58,-125.78)  302.01                80
 08/01/2020   22:08:24   (  -0.03,-128.36) (  -0.66,-131.07)  309.28                80