Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2022 4 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/18/2022   21:52:31   (  -0.12,-128.37) (   0.29,-126.54)  209.55                80
 04/20/2022   10:14:17   (   0.12,-128.33) (   0.92,-131.79)  395.15                80
 04/21/2022   09:52:53   (   0.12,-128.32) (  -0.13,-127.27)  119.90                80
 04/22/2022   22:14:48   (  -0.12,-128.31) (  -1.07,-132.57)  484.96                80
 04/23/2022   21:58:43   (  -0.13,-128.30) (  -0.08,-128.03)   30.21                80
 04/26/2022   10:01:45   (   0.13,-128.24) (   0.23,-128.76)   59.70                80
 04/27/2022   09:40:19   (   0.14,-128.22) (  -0.77,-124.23)  455.24                80
 04/28/2022   22:02:14   (  -0.12,-128.21) (  -0.43,-129.52)  150.01                80
 04/29/2022   21:46:09   (  -0.13,-128.19) (   0.57,-124.99)  365.01                80
 05/01/2022   10:05:16   (   0.12,-128.15) (   0.57,-130.26)  240.12                80