Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 7 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/11/2020   22:01:57   (  -0.03,-128.30) (  -0.31,-129.53)  140.97                80
 07/12/2020   21:45:54   (  -0.03,-128.31) (   0.74,-125.01)  376.71                80
 07/14/2020   10:07:42   (   0.03,-128.38) (   0.46,-130.28)  216.59                80
 07/15/2020   09:46:19   (   0.02,-128.39) (  -0.59,-125.76)  300.40                80
 07/16/2020   22:08:15   (  -0.02,-128.35) (  -0.65,-131.05)  308.89                80
 07/17/2020   21:52:11   (  -0.01,-128.35) (   0.39,-126.53)  207.83                80
 07/19/2020   10:14:01   (   0.00,-128.41) (   0.74,-131.81)  386.67                80
 07/20/2020   09:52:36   (  -0.01,-128.41) (  -0.25,-127.27)  129.35                80
 07/21/2020   22:14:33   (   0.01,-128.36) (  -0.93,-132.58)  481.60                80
 07/22/2020   21:58:29   (   0.02,-128.36) (   0.06,-128.05)   34.64                80
 07/25/2020   10:01:34   (  -0.02,-128.41) (   0.09,-128.79)   44.56                80