Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 10 31.  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) (   0.29,-128.99)   64.41                80
 11/02/2021   09:44:20   (   0.18,-128.43) (  -0.71,-124.46)  452.67                80
 11/03/2021   22:03:38   (  -0.15,-128.44) (  -0.47,-129.77)  152.23                80
 11/04/2021   21:47:34   (  -0.17,-128.44) (   0.53,-125.24)  364.58                80
 11/06/2021   10:06:46   (   0.14,-128.44) (   0.58,-130.53)  236.93                80
 11/07/2021   09:50:41   (   0.15,-128.44) (  -0.37,-125.99)  279.21                80
 11/08/2021   22:10:01   (  -0.12,-128.43) (  -0.75,-131.31)  327.49                80
 11/09/2021   21:53:57   (  -0.14,-128.43) (   0.25,-126.78)  188.33                80
 11/11/2021   10:13:07   (   0.10,-128.42) (   0.91,-132.06)  414.03                80
 11/12/2021   09:57:04   (   0.12,-128.42) (  -0.09,-127.53)  101.69                80