Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 5 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/11/2020   10:07:42   (  -0.09,-128.31) (   0.37,-130.35)  232.50                80
 05/12/2020   09:46:18   (  -0.10,-128.31) (  -0.66,-125.82)  283.56                80
 05/13/2020   22:10:53   (   0.07,-128.30) (  -0.58,-131.11)  320.75                80
 05/14/2020   21:49:28   (   0.08,-128.31) (   0.45,-126.58)  195.79                80
 05/16/2020   10:13:56   (  -0.06,-128.32) (   0.74,-131.85)  402.54                80
 05/17/2020   09:52:31   (  -0.07,-128.32) (  -0.29,-127.32)  113.35                80
 05/18/2020   22:17:07   (   0.04,-128.30) (  -0.94,-132.61)  492.07                80
 05/19/2020   21:55:42   (   0.06,-128.30) (   0.09,-128.08)   24.09                80
 05/22/2020   10:01:25   (  -0.05,-128.30) (   0.07,-128.82)   59.15                80
 05/23/2020   09:40:01   (  -0.07,-128.29) (  -0.96,-124.29)  455.86                80