Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 3 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/14/2021   21:52:00   (   0.12,-128.42) (   0.52,-126.60)  207.37                80
 03/16/2021   10:13:47   (  -0.10,-128.40) (   0.67,-131.86)  395.01                80
 03/17/2021   09:52:23   (  -0.11,-128.40) (  -0.37,-127.34)  121.36                80
 03/18/2021   22:14:18   (   0.10,-128.43) (  -0.85,-132.63)  479.47                80
 03/19/2021   21:58:14   (   0.10,-128.43) (   0.19,-128.10)   37.18                80
 03/22/2021   10:01:16   (  -0.09,-128.40) (   0.01,-128.83)   49.70                80
 03/23/2021   09:39:51   (  -0.10,-128.39) (  -1.03,-124.30)  465.73                80
 03/24/2021   22:01:46   (   0.08,-128.40) (  -0.19,-129.60)  136.90                80
 03/25/2021   21:45:42   (   0.09,-128.39) (   0.85,-125.07)  378.92                80
 03/27/2021   10:07:28   (  -0.07,-128.36) (   0.39,-130.33)  224.27                80