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

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/16/2020   10:05:32   (  -0.11,-128.24) (   0.36,-130.34)  240.05                80
 09/17/2020   09:49:28   (  -0.11,-128.26) (  -0.65,-125.81)  278.77                80
 09/18/2020   22:11:25   (   0.11,-128.25) (  -0.51,-131.12)  326.59                80
 09/19/2020   21:50:01   (   0.11,-128.27) (   0.50,-126.59)  191.80                80
 09/21/2020   10:11:49   (  -0.11,-128.33) (   0.68,-131.86)  401.81                80
 09/22/2020   09:55:44   (  -0.11,-128.35) (  -0.33,-127.33)  116.29                80
 09/23/2020   22:17:42   (   0.12,-128.33) (  -0.82,-132.64)  489.93                80
 09/24/2020   21:56:17   (   0.12,-128.34) (   0.19,-128.11)   27.62                80
 09/27/2020   09:59:21   (  -0.13,-128.41) (  -0.01,-128.84)   49.74                80
 09/28/2020   09:43:17   (  -0.13,-128.42) (  -1.02,-124.31)  467.93                80