Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 11 14.  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   22:00:19   (  -0.10,-128.43) (  -0.04,-128.31)   14.70                80
 11/17/2021   10:00:45   (   0.09,-128.42) (   0.25,-129.05)   72.13                80
 11/18/2021   09:44:42   (   0.10,-128.41) (  -0.76,-124.52)  443.43                80
 11/19/2021   22:04:00   (  -0.08,-128.39) (  -0.42,-129.83)  163.95                80
 11/20/2021   21:47:56   (  -0.09,-128.38) (   0.59,-125.30)  351.27                80
 11/22/2021   10:07:07   (   0.06,-128.37) (   0.55,-130.58)  252.28                80
 11/23/2021   09:51:03   (   0.08,-128.35) (  -0.46,-126.05)  262.43                80
 11/24/2021   22:10:22   (  -0.05,-128.32) (  -0.72,-131.36)  346.34                80
 11/25/2021   21:54:18   (  -0.06,-128.30) (   0.30,-126.83)  168.17                80
 11/27/2021   10:13:27   (   0.03,-128.28) (   0.91,-132.10)  436.05                80