Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 11 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)
 11/09/2021   21:53:57   (  -0.14,-128.45) (   0.27,-126.78)  191.04                80
 11/11/2021   10:13:08   (   0.10,-128.45) (   0.89,-132.06)  410.80                80
 11/12/2021   09:57:04   (   0.12,-128.45) (  -0.12,-127.53)  105.30                80
 11/14/2021   22:00:19   (  -0.10,-128.44) (  -0.05,-128.31)   14.97                80
 11/17/2021   10:00:45   (   0.09,-128.43) (   0.25,-129.05)   70.84                80
 11/18/2021   09:44:41   (   0.10,-128.43) (  -0.75,-124.52)  445.01                80
 11/19/2021   22:04:00   (  -0.08,-128.41) (  -0.42,-129.83)  162.36                80
 11/20/2021   21:47:56   (  -0.09,-128.40) (   0.59,-125.30)  353.08                80
 11/22/2021   10:07:07   (   0.06,-128.39) (   0.55,-130.58)  249.85                80