Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 7 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/19/2020   10:14:00   (   0.03,-128.41) (   0.77,-131.80)  385.66                80
 07/20/2020   09:52:36   (   0.03,-128.42) (  -0.22,-127.27)  130.64                80
 07/21/2020   22:14:33   (  -0.03,-128.37) (  -0.97,-132.57)  479.23                80
 07/22/2020   21:58:29   (  -0.03,-128.37) (   0.02,-128.04)   37.18                80
 07/25/2020   10:01:33   (   0.03,-128.41) (   0.12,-128.78)   42.27                80
 07/26/2020   09:40:10   (   0.03,-128.41) (  -0.92,-124.26)  473.57                80
 07/27/2020   22:02:06   (  -0.03,-128.35) (  -0.32,-129.55)  137.44                80
 07/28/2020   21:46:03   (  -0.03,-128.35) (   0.73,-125.03)  378.14                80
 07/30/2020   10:07:51   (   0.01,-128.39) (   0.46,-130.30)  218.58                80
 07/31/2020   09:46:28   (  -0.02,-128.38) (  -0.58,-125.78)  295.79                80