Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 5 24.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/25/2021   10:01:17   (   0.07,-128.39) (   0.17,-128.78)   44.10                80
 05/26/2021   09:39:53   (   0.07,-128.41) (  -0.87,-124.25)  473.40                80
 05/27/2021   22:01:50   (  -0.07,-128.36) (  -0.33,-129.56)  136.50                80
 05/28/2021   21:45:46   (  -0.07,-128.37) (   0.65,-125.02)  381.26                80
 05/30/2021   10:07:35   (   0.07,-128.46) (   0.50,-130.30)  209.85                80
 05/31/2021   09:46:12   (   0.07,-128.47) (  -0.54,-125.78)  307.32                80
 06/01/2021   22:08:09   (  -0.07,-128.41) (  -0.65,-131.08)  303.82                80
 06/02/2021   21:52:05   (  -0.07,-128.43) (   0.34,-126.55)  213.90                80
 06/04/2021   10:13:54   (   0.07,-128.52) (   0.82,-131.83)  376.43                80
 06/05/2021   09:52:30   (   0.08,-128.53) (  -0.22,-127.30)  140.65                80
 06/06/2021   22:14:27   (  -0.07,-128.46) (  -1.02,-132.60)  471.84                80