Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 9 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/19/2020   21:50:00   (   0.11,-128.27) (   0.48,-126.58)  191.93                80
 09/21/2020   10:11:49   (  -0.11,-128.34) (   0.69,-131.85)  401.13                80
 09/22/2020   09:55:45   (  -0.11,-128.36) (  -0.37,-127.33)  117.12                80
 09/23/2020   22:17:41   (   0.12,-128.34) (  -0.84,-132.63)  489.34                80
 09/24/2020   21:56:17   (   0.12,-128.35) (   0.17,-128.10)   28.29                80
 09/27/2020   09:59:22   (  -0.13,-128.42) (  -0.06,-128.85)   48.44                80
 09/28/2020   09:43:17   (  -0.13,-128.43) (  -1.07,-124.32)  469.42                80
 09/29/2020   22:05:14   (   0.13,-128.41) (  -0.13,-129.62)  137.11                80
 09/30/2020   21:43:49   (   0.13,-128.42) (   0.88,-125.09)  380.40                80
 10/02/2020   10:05:37   (  -0.13,-128.48) (   0.30,-130.36)  214.38                80
 10/03/2020   09:49:33   (  -0.13,-128.49) (  -0.71,-125.82)  303.15                80