Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 3 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)
 03/16/2021   10:13:48   (  -0.10,-128.40) (   0.65,-131.87)  395.01                80
 03/17/2021   09:52:22   (  -0.11,-128.40) (  -0.33,-127.33)  121.32                80
 03/18/2021   22:14:19   (   0.10,-128.42) (  -0.83,-132.63)  479.75                80
 03/19/2021   21:58:13   (   0.10,-128.42) (   0.15,-128.09)   36.95                80
 03/22/2021   10:01:16   (  -0.09,-128.39) (  -0.01,-128.83)   50.04                80
 03/23/2021   09:39:50   (  -0.10,-128.38) (  -0.99,-124.30)  465.36                80
 03/24/2021   22:01:47   (   0.08,-128.39) (  -0.17,-129.60)  137.52                80
 03/25/2021   21:45:41   (   0.08,-128.39) (   0.81,-125.06)  378.26                80
 03/27/2021   10:07:29   (  -0.07,-128.36) (   0.37,-130.33)  224.84                80
 03/28/2021   09:46:04   (  -0.08,-128.34) (  -0.68,-125.80)  289.99                80
 03/29/2021   22:07:59   (   0.07,-128.33) (  -0.54,-131.10)  314.81                80