Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 5 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)
 05/01/2020   09:52:34   (  -0.14,-128.23) (  -0.32,-127.34)  100.94                80
 05/03/2020   21:55:46   (   0.12,-128.25) (   0.16,-128.12)   15.26                80
 05/06/2020   10:01:28   (  -0.11,-128.29) (   0.00,-128.85)   64.26                80
 05/07/2020   09:40:04   (  -0.13,-128.29) (  -1.03,-124.32)  452.37                80
 05/08/2020   22:04:39   (   0.10,-128.28) (  -0.21,-129.61)  152.12                80
 05/09/2020   21:43:15   (   0.12,-128.29) (   0.82,-125.09)  364.59                80
 05/11/2020   10:07:42   (  -0.09,-128.31) (   0.38,-130.35)  232.74                80
 05/12/2020   09:46:18   (  -0.10,-128.31) (  -0.65,-125.82)  283.39                80
 05/13/2020   22:10:53   (   0.07,-128.29) (  -0.58,-131.11)  322.22                80
 05/14/2020   21:49:28   (   0.09,-128.29) (   0.45,-126.59)  194.26                80