About

Location

Exeter


About Me:

Environmental Scientist


Please tell us a bit about your UAV interest

I'm interested in using UAVs to acquire aerial imagery to characterise the structure of Dryland ecosystems


Hometown:

Exeter, UK


Activity Feed

AndyC posted a discussion
I'm having difficulties managing prefetched maps, that I haven't been able to find addressed in previous discussions.To clear out unwanted prefetched map files, I deleted the 'gmapcache' directory from my Mission Planner directory. In the past I…
Mar 7, 2017
AndyC replied to Tryggvi Stefánsson's discussion Geo ref not working after update of Mission planner 1.3.31.1
"Although the issue with the Geo Ref Images utility in MP 1.3.31.1 that was raised by the original poster doesn't appear for me in MP 1.3.32, I'm encountering new problems with this tool I haven't encountered previously.
With 'Use AMSL Atl' selected,…"
Dec 7, 2015
AndyC replied to Randy's discussion ArduCopter-3.2 beta testing
"I'm still encountering a similar issue with the Geo Reg Images utility in MP-1.3.32. Pre-process appears to only work for me when 'Use AMSL Alt' is unselected. If this is selected, the utility prints the error "Log file problem. Aborting". I'm still…"
Dec 7, 2015
AndyC replied to Matt Gunn's discussion Let's talk Canon cameras
"I've produced several very accurate models (DGPS controls GCP RMS error <17 mm) with images from several S100 at 1/1000th second Tv; The minimum usable shutter speed will depend on flying speed/altitude, but I don't think it always has to be faster…"
Oct 27, 2014
AndyC replied to Randy's discussion ArduCopter-3.2 beta testing
"This sounds similar to an issue I had with my Y6. RTL completed fine in the air, once on the ground the motors initially slowed but then gradually starting increasing; it appeared about to flip so I switched to Stabilize to disarm. The throttle was…"
Oct 2, 2014
AndyC posted a discussion in Terrain/Surface Mapping
I've just started using the great tool for geotagging photos with the flight log in Mission Planner's (v1.3.10). While most of the Wiki describing this tool is refreshingly clear, maybe the section on Field of View could perhaps be more complete.I'm…
Sep 28, 2014
AndyC replied to AndyC's discussion Can anyone help identify why Auto and RTL both failed?
"@John. I'm afraid I didn't check the that as I was focusing on the other things going awry.
I've just upgraded to AC 3.2_rc10 (beta), and had a couple of flights without observing this - I'll be keeping an eye on it though. Cheers"
Sep 26, 2014
AndyC replied to Randy's discussion ArduCopter-3.2 beta testing
"Adding to the groundswell that 3.2_rc10 is looking pretty stable...
I just updated my 3DR Y6B from AC3.1.5 to 3.c_rc10. So far I've flown with Stabilize, AltHold, Loiter and RTL which all work nicely; congrats again to the Dev team.
(PS. Can anyone…"
Sep 26, 2014
AndyC replied to AndyC's discussion Can anyone help identify why Auto and RTL both failed?
"That temporary workaround resolved the problem, which won't be present in AC 3.2."
Sep 25, 2014
AndyC replied to AndyC's discussion Can anyone help identify why Auto and RTL both failed?
"I just found a nearly identical problem reported on the ArduPilot forum in June; narrowing down the problem to a bug with the ‘DO_CHANGE_SPEED’ command.
From the information on GitHub (#766) and a note on the Wiki, I think the issue might be cause…"
Sep 24, 2014
AndyC commented on Thorsten's blog post 3D reconstruction of largest Hallstatt tumulus grave in central Europe (T3 entry)
"Fantastic demonstration Thorsten; could you let us know how many images you captured for this reconstruction?"
Sep 24, 2014
AndyC posted a discussion
Hi guys,I need to use my Y6 (APM 2.6; AC 3.1.5) for surveying and need to be able to automate missions, but today my auto mission didn't complete and RTL failed - it was as though the flight mode changed to loiter and ignored RTL signals. I've spent…
Sep 23, 2014
AndyC replied to Mapper905's discussion Exposure rate limitations
"Have you checked whether this works? (If you point the camera at a close (<2 m) subject, does it ignore your override and refocus?)
I've tried using the CHDK menu to set the focus to infinity, but the autofocus overrides this and refocuses before…"
Sep 20, 2014
AndyC replied to Euan Ramsay's discussion Y6 drags tail on full power climb. in Arducopter Y6 Owners
"As I understand it (hopefully some one will correct if I'm wrong), CoT is equidistant between the three co-axial motor positions. For optimal climbing, CoG should be at (or very close to) the CoT, but this might not be the case depending on how…"
Sep 20, 2014
AndyC replied to Euan Ramsay's discussion Y6 drags tail on full power climb. in Arducopter Y6 Owners
"I think you might be right with it's a center of gravity issue - if the rear motors are having to produce more trust to compensate for an uneven weight distribution that'd seem to explain why its level normally but struggles to keep up why at full…"
Sep 20, 2014
AndyC replied to Mapper905's discussion Exposure rate limitations
"Thanks, presumably that using CHDKs native support for USB triggering rather than a script.
Have you managed to lock the focus, it seems a lot of people (including me) are struggling to do this with the SX260HS in particular when running CHDK."
Sep 19, 2014
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