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

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/11/2020   09:59:16   (  -0.09,-128.12) (   0.04,-128.83)   80.34                80
 09/12/2020   09:43:11   (  -0.09,-128.14) (  -0.96,-124.30)  438.61                80
 09/13/2020   22:05:07   (   0.10,-128.13) (  -0.25,-129.59)  167.23                80
 09/14/2020   21:43:44   (   0.10,-128.15) (   0.81,-125.08)  351.29                80
 09/16/2020   10:05:32   (  -0.11,-128.23) (   0.36,-130.35)  241.51                80
 09/17/2020   09:49:28   (  -0.11,-128.24) (  -0.64,-125.81)  276.96                80
 09/18/2020   22:11:25   (   0.11,-128.23) (  -0.51,-131.12)  329.15                80
 09/19/2020   21:50:01   (   0.11,-128.24) (   0.50,-126.59)  188.94                80
 09/21/2020   10:11:49   (  -0.11,-128.31) (   0.68,-131.86)  405.00                80
 09/22/2020   09:55:44   (  -0.11,-128.32) (  -0.33,-127.33)  112.77                80