Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 11 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 11/18/2021   09:44:42   (   0.10,-128.40) (  -0.76,-124.52)  442.83                80
 11/19/2021   22:04:00   (  -0.08,-128.39) (  -0.42,-129.83)  164.27                80
 11/20/2021   21:47:56   (  -0.09,-128.38) (   0.59,-125.30)  350.81                80
 11/22/2021   10:07:07   (   0.06,-128.35) (   0.55,-130.58)  253.46                80
 11/23/2021   09:51:03   (   0.08,-128.34) (  -0.46,-126.05)  261.07                80
 11/24/2021   22:10:22   (  -0.05,-128.31) (  -0.72,-131.36)  347.50                80
 11/25/2021   21:54:18   (  -0.06,-128.29) (   0.29,-126.83)  166.88                80
 11/27/2021   10:13:27   (   0.03,-128.26) (   0.90,-132.10)  437.96                80
 11/28/2021   09:57:24   (   0.04,-128.24) (  -0.11,-127.57)   76.06                80
 11/30/2021   21:57:59   (  -0.03,-128.18) (  -0.05,-128.35)   19.47                80
 12/01/2021   21:41:54   (  -0.04,-128.15) (   0.90,-123.81)  494.32                80