Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 9 17.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/18/2020   22:11:25   (   0.11,-128.25) (  -0.52,-131.12)  326.48                80
 09/19/2020   21:50:00   (   0.11,-128.27) (   0.49,-126.59)  191.98                80
 09/21/2020   10:11:49   (  -0.11,-128.34) (   0.68,-131.86)  401.28                80
 09/22/2020   09:55:44   (  -0.11,-128.35) (  -0.32,-127.33)  116.92                80
 09/23/2020   22:17:42   (   0.12,-128.34) (  -0.83,-132.64)  489.37                80
 09/24/2020   21:56:17   (   0.12,-128.35) (   0.18,-128.10)   28.25                80
 09/27/2020   09:59:21   (  -0.13,-128.42) (  -0.02,-128.84)   48.63                80
 09/28/2020   09:43:16   (  -0.13,-128.43) (  -1.03,-124.31)  469.13                80
 09/29/2020   22:05:14   (   0.13,-128.41) (  -0.11,-129.62)  137.27                80
 09/30/2020   21:43:49   (   0.13,-128.42) (   0.90,-125.09)  380.25                80