Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 9 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/22/2020   09:55:45   (  -0.11,-128.36) (  -0.34,-127.33)  117.12                80
 09/23/2020   22:17:41   (   0.12,-128.33) (  -0.87,-132.63)  489.63                80
 09/24/2020   21:56:17   (   0.12,-128.35) (   0.20,-128.11)   28.09                80
 09/27/2020   09:59:21   (  -0.13,-128.42) (  -0.04,-128.84)   48.54                80
 09/28/2020   09:43:17   (  -0.13,-128.43) (  -1.05,-124.31)  469.16                80
 09/29/2020   22:05:13   (   0.13,-128.41) (  -0.16,-129.61)  137.69                80
 09/30/2020   21:43:49   (   0.13,-128.42) (   0.86,-125.08)  379.78                80
 10/02/2020   10:05:37   (  -0.13,-128.47) (   0.32,-130.35)  214.83                80
 10/03/2020   09:49:33   (  -0.13,-128.48) (  -0.75,-125.83)  302.68                80
 10/04/2020   22:11:30   (   0.13,-128.45) (  -0.44,-131.13)  304.38                80