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

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/16/2020   22:08:15   (  -0.02,-128.35) (  -0.62,-131.06)  308.28                80
 07/17/2020   21:52:11   (  -0.02,-128.36) (   0.37,-126.52)  208.46                80
 07/19/2020   10:14:00   (   0.01,-128.41) (   0.77,-131.80)  386.50                80
 07/20/2020   09:52:37   (  -0.00,-128.41) (  -0.28,-127.28)  129.54                80
 07/21/2020   22:14:34   (   0.01,-128.36) (  -0.90,-132.59)  481.01                80
 07/22/2020   21:58:30   (   0.02,-128.36) (   0.09,-128.05)   35.04                80
 07/25/2020   10:01:34   (  -0.02,-128.41) (   0.06,-128.80)   44.50                80
 07/26/2020   09:40:10   (   0.01,-128.40) (  -0.94,-124.26)  471.94                80
 07/27/2020   22:02:07   (   0.01,-128.34) (  -0.25,-129.57)  139.85                80
 07/28/2020   21:46:03   (   0.01,-128.33) (   0.75,-125.04)  375.66                80