That's right, the native data is 100m resolution, but when it's sampled down to fit AH, it's a mere fraction of that. I use it because I found the DEM and DTED0 data to have too many holes, and was also just wrong in some spots.
I have access to the Level 1 data through my work. I'm not allowed to share it at it's full resolution, but it's okay after it's been resampled to AH standards. So, when done right, my elevations are as accurate as you can get with the AH engine.
You should see the Level 2 data...
