Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 10 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 11/01/2021   10:00:23   (   0.17,-128.42) (   0.26,-128.99)   64.66                80
 11/02/2021   09:44:20   (   0.18,-128.43) (  -0.73,-124.46)  452.47                80
 11/03/2021   22:03:38   (  -0.15,-128.43) (  -0.45,-129.77)  152.51                80
 11/04/2021   21:47:35   (  -0.17,-128.44) (   0.55,-125.24)  364.23                80
 11/06/2021   10:06:45   (   0.14,-128.44) (   0.61,-130.52)  237.31                80
 11/07/2021   09:50:42   (   0.15,-128.44) (  -0.39,-125.99)  278.75                80
 11/08/2021   22:10:00   (  -0.12,-128.43) (  -0.79,-131.30)  328.02                80
 11/09/2021   21:53:56   (  -0.14,-128.42) (   0.22,-126.77)  187.77                80
 11/11/2021   10:13:07   (   0.10,-128.42) (   0.94,-132.05)  414.65                80
 11/12/2021   09:57:03   (   0.12,-128.41) (  -0.07,-127.52)  101.04                80