Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 9 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/12/2020   09:43:11   (  -0.09,-128.15) (  -0.94,-124.29)  438.77                80
 09/13/2020   22:05:08   (   0.10,-128.14) (  -0.22,-129.60)  166.67                80
 09/14/2020   21:43:43   (   0.10,-128.16) (   0.78,-125.07)  351.91                80
 09/16/2020   10:05:32   (  -0.11,-128.23) (   0.39,-130.34)  240.98                80
 09/17/2020   09:49:28   (  -0.11,-128.25) (  -0.68,-125.82)  277.61                80
 09/18/2020   22:11:25   (   0.11,-128.24) (  -0.54,-131.12)  328.10                80
 09/19/2020   21:50:00   (   0.11,-128.25) (   0.47,-126.58)  190.05                80
 09/21/2020   10:11:48   (  -0.11,-128.32) (   0.71,-131.85)  403.97                80
 09/22/2020   09:55:45   (  -0.11,-128.33) (  -0.36,-127.34)  113.92                80
 09/23/2020   22:17:41   (   0.12,-128.31) (  -0.84,-132.63)  492.67                80
 09/24/2020   21:56:17   (   0.12,-128.32) (   0.16,-128.10)   24.62                80