Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 11 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 11/17/2021   10:00:46   (   0.09,-128.42) (   0.21,-129.06)   72.55                80
 11/18/2021   09:44:41   (   0.10,-128.41) (  -0.74,-124.51)  442.90                80
 11/19/2021   22:04:01   (  -0.08,-128.39) (  -0.38,-129.84)  164.33                80
 11/20/2021   21:47:56   (  -0.09,-128.38) (   0.57,-125.29)  350.79                80
 11/22/2021   10:07:06   (   0.06,-128.36) (   0.57,-130.58)  253.30                80
 11/23/2021   09:51:03   (   0.08,-128.34) (  -0.44,-126.05)  261.24                80
 11/24/2021   22:10:21   (  -0.05,-128.31) (  -0.74,-131.36)  347.41                80
 11/25/2021   21:54:18   (  -0.06,-128.29) (   0.27,-126.83)  166.96                80
 11/27/2021   10:13:28   (   0.03,-128.26) (   0.87,-132.11)  437.72                80
 11/28/2021   09:57:24   (   0.04,-128.24) (  -0.08,-127.57)   76.39                80