Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 12 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)
 12/16/2020   10:01:14   (   0.07,-128.20) (   0.22,-128.75)   63.15                80
 12/17/2020   09:39:50   (   0.05,-128.21) (  -0.84,-124.23)  453.71                80
 12/18/2020   22:04:26   (  -0.09,-128.25) (  -0.38,-129.53)  146.68                80
 12/19/2020   21:43:03   (  -0.06,-128.25) (   0.68,-125.01)  369.77                80
 12/21/2020   10:07:30   (   0.10,-128.25) (   0.53,-130.28)  230.82                80
 12/22/2020   09:46:06   (   0.08,-128.26) (  -0.48,-125.75)  285.88                80
 12/23/2020   22:10:42   (  -0.12,-128.29) (  -0.74,-131.05)  314.26                80
 12/24/2020   21:49:19   (  -0.10,-128.30) (   0.32,-126.53)  201.94                80
 12/26/2020   10:13:45   (   0.14,-128.28) (   0.95,-131.78)  399.77                80
 12/27/2020   09:52:21   (   0.12,-128.28) (  -0.12,-127.26)  116.31                80
 12/28/2020   22:16:58   (  -0.17,-128.31) (  -1.10,-132.56)  484.54                80
 12/29/2020   21:55:33   (  -0.14,-128.30) (  -0.08,-128.03)   30.80                80