Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 7 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)
 07/21/2020   22:14:33   (  -0.01,-128.36) (  -0.97,-132.57)  480.14                80
 07/22/2020   21:58:30   (  -0.01,-128.37) (   0.08,-128.05)   36.87                80
 07/25/2020   10:01:33   (   0.01,-128.43) (   0.12,-128.78)   40.85                80
 07/26/2020   09:40:10   (   0.01,-128.43) (  -0.93,-124.26)  475.70                80
 07/27/2020   22:02:07   (  -0.02,-128.38) (  -0.25,-129.57)  134.43                80
 07/28/2020   21:46:03   (  -0.02,-128.38) (   0.74,-125.03)  381.92                80
 07/30/2020   10:07:51   (   0.02,-128.43) (   0.45,-130.30)  213.18                80
 07/31/2020   09:46:27   (   0.03,-128.43) (  -0.55,-125.77)  302.70                80
 08/01/2020   22:08:24   (  -0.03,-128.37) (  -0.64,-131.08)  308.57                80
 08/02/2020   21:52:19   (  -0.03,-128.36) (   0.36,-126.54)  207.23                80
 08/04/2020   10:14:08   (   0.04,-128.41) (   0.83,-131.81)  388.33                80