Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 8 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)
 08/11/2020   09:40:17   (  -0.01,-128.20) (  -0.88,-124.26)  447.88                80
 08/12/2020   22:02:14   (   0.02,-128.11) (  -0.31,-129.57)  166.21                80
 08/13/2020   21:46:10   (   0.02,-128.08) (   0.69,-125.04)  346.73                80
 08/15/2020   10:05:18   (  -0.02,-128.07) (   0.49,-130.31)  255.08                80
 08/16/2020   09:49:14   (  -0.02,-128.04) (  -0.51,-125.77)  257.30                80
 08/17/2020   22:08:31   (   0.03,-127.94) (  -0.67,-131.08)  358.36                80
 08/18/2020   21:52:26   (   0.02,-127.90) (   0.33,-126.55)  153.87                80
 08/20/2020   10:11:35   (  -0.03,-127.88) (   0.85,-131.82)  448.64                80
 08/21/2020   09:55:30   (  -0.03,-127.84) (  -0.15,-127.28)   63.32                80
 08/23/2020   21:56:02   (   0.03,-127.69) (  -0.08,-128.05)   41.42                80