Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 11 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)
 11/11/2021   10:13:07   (   0.10,-128.45) (   0.92,-132.05)  410.87                80
 11/12/2021   09:57:04   (   0.12,-128.45) (  -0.09,-127.52)  105.13                80
 11/14/2021   22:00:19   (  -0.10,-128.44) (  -0.09,-128.30)   14.84                80
 11/17/2021   10:00:45   (   0.09,-128.43) (   0.23,-129.05)   71.07                80
 11/18/2021   09:44:42   (   0.10,-128.42) (  -0.78,-124.52)  444.67                80
 11/19/2021   22:04:00   (  -0.08,-128.41) (  -0.40,-129.83)  162.72                80
 11/20/2021   21:47:57   (  -0.09,-128.40) (   0.61,-125.31)  352.66                80
 11/22/2021   10:07:07   (   0.06,-128.39) (   0.53,-130.59)  250.36                80
 11/23/2021   09:51:03   (   0.08,-128.37) (  -0.42,-126.04)  264.56                80