Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 8 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/20/2019   22:15:15   (   0.35,-128.44) (  -0.62,-132.74)  490.69                80
 08/21/2019   21:59:11   (   0.34,-128.44) (   0.40,-128.21)   25.89                80
 08/24/2019   09:59:34   (  -0.35,-128.45) (  -0.21,-128.94)   56.81                80
 08/25/2019   09:43:29   (  -0.35,-128.44) (  -1.23,-124.41)  458.88                80
 08/26/2019   22:02:47   (   0.37,-128.40) (   0.09,-129.72)  150.21                80
 08/27/2019   21:46:42   (   0.36,-128.39) (   1.11,-125.19)  365.18                80
 08/29/2019   10:05:49   (  -0.38,-128.40) (   0.09,-130.46)  234.69                80
 08/30/2019   09:49:45   (  -0.37,-128.38) (  -0.93,-125.93)  280.31                80
 08/31/2019   22:09:01   (   0.38,-128.33) (  -0.27,-131.23)  329.62                80
 09/01/2019   21:52:57   (   0.38,-128.32) (   0.76,-126.70)  185.46                80