Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 11 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 11/14/2021   22:00:18   (  -0.10,-128.43) (  -0.10,-128.30)   14.71                80
 11/17/2021   10:00:45   (   0.09,-128.42) (   0.24,-129.05)   71.86                80
 11/18/2021   09:44:42   (   0.10,-128.41) (  -0.77,-124.52)  443.74                80
 11/19/2021   22:04:00   (  -0.08,-128.40) (  -0.40,-129.83)  163.66                80
 11/20/2021   21:47:57   (  -0.09,-128.39) (   0.61,-125.30)  351.61                80
 11/22/2021   10:07:07   (   0.06,-128.37) (   0.54,-130.58)  251.75                80
 11/23/2021   09:51:02   (   0.08,-128.36) (  -0.41,-126.04)  263.03                80
 11/24/2021   22:10:22   (  -0.05,-128.33) (  -0.70,-131.37)  345.75                80
 11/25/2021   21:54:17   (  -0.06,-128.31) (   0.25,-126.82)  168.82                80