"Nice summary, which antennas do you use and can you post a picture of your control point rig in the field and close up?"

"@Walter,

Very interesting. Have you run any tests in tall grass or another non-hard landcover? You essentially tested absolute accuracy of the system but my guess is that both horizontal and vertical accuracy radically decreases in a tall…"

"Depending on how you surveyed the GCPs, you're within the error of the test data. RTK GPS would have precisions on that level. Are you running dual-frequency RTK on the UAS, using targets, or simple L1 code positioning on the UAS?"

"How was accuracy and range determined for real world applications as discussed above? How do you know the height of the aircraft when ideally the laser should be more precise and accurate than barometer or GPS (even RTK GPS)?"

"For those looking to compare DSM/DEM models from one sensing method to another, remember that LIDAR and the photogrammetry-derived raster DSM/DEM are based on points which are interpolated. The native format of the data is not a raster. As such, you…"

"You're talking about internal precision of the model right? Not fundamental accuracy? Did you evaluate accuracy using independent high-precision GPS points not used for georeferencing? How did you calculate these metrics?

Your error certainly…"

"Check out the Gumstix Overo computers (especially the Fire and Water). Haven't flown one yet but the power is there to run linux et al.

https://www.gumstix.com"

"Was this flight in the US National Airspace (any height above ground and private property doesn't matter while in flight)?
Is Trappy et al. sponsored or hired by by Go Pro, Hobby King, Immersion RC (logos at the start of the video suggesting…"

"Remote Sensing (RS) is incredibly useful for a wide variety of applications and will be the primary use of civilian UASs. A UAS gives you both high spatial and temporal resolution at a low cost, a difficult to impossible task with other methods. I…"

"Thales AC12 does carrier phase. I've post processed to within a foot of an NGS benchmark. Lots of hurdles but possible."