Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 9 5.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/06/2020   09:55:38   (  -0.08,-127.98) (  -0.21,-127.30)   77.15                80
 09/08/2020   21:56:10   (   0.08,-128.01) (   0.05,-128.08)    8.80                80
 09/11/2020   09:59:15   (  -0.09,-128.12) (   0.06,-128.83)   80.38                80
 09/12/2020   09:43:11   (  -0.09,-128.14) (  -0.94,-124.29)  438.45                80
 09/13/2020   22:05:08   (   0.10,-128.13) (  -0.21,-129.61)  168.20                80
 09/14/2020   21:43:44   (   0.10,-128.15) (   0.79,-125.07)  350.23                80
 09/16/2020   10:05:32   (  -0.11,-128.22) (   0.38,-130.34)  241.98                80
 09/17/2020   09:49:27   (  -0.11,-128.24) (  -0.62,-125.81)  276.45                80
 09/18/2020   22:11:25   (   0.11,-128.22) (  -0.53,-131.12)  330.48                80