Alexey Dobrovolskiy
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  • Riga
  • Latvia
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Alexey Dobrovolskiy's Groups

Alexey Dobrovolskiy's Discussions

WiFi 5Ghz telemetry module for Pixhawk

Started Jun 10, 2017 0 Replies

Hi,Anybody knows WiFi modules similar to very popular esp-07 or XBee WiFi, but for 5GHz? I mean modules compatible with Pixhawk, ie with UART port and necessary software support.Continue

Tags: 5Ghz, WiFi

Droneshare support

Started this discussion. Last reply by Alexey Dobrovolskiy Sep 14, 2015. 1 Reply

Hi,how to reach Droneshare support? support@droneshare.com it seems not working.My problem:I have uploaded my mission to Droneshare…Continue

UAV regulations in international waters

Started Aug 31, 2015 0 Replies

Hi,Anybody has understanding how regulated drones usage in international waters (high seas)?Continue

 

Alexey Dobrovolskiy's Page

Latest Activity

Alexey Dobrovolskiy replied to Ethan Payne's discussion Display images onto UGCS in the group UgCS
"Hi Ethan. sorry for delay from our side. It's not just converting into GeoTiff. You need to take drone AGL, yaw and camera position to scale /rotate picture in accordance to the ground level and drone/camera attitude. UgCS Mapper can't do…"
Feb 13
Alexey Dobrovolskiy replied to Bodo Schütze's discussion Errors with 3s RAW image trigger time @ Phantom 4 PRO in the group UgCS
"Hi Bodo, I'm very sorry for my inappropriate reaction... Our 3s in camera profile is a conservative value based on our experience. We get such results too often with shorter time (it's Phantom 3 and 2s between shots):"
Feb 3
Alexey Dobrovolskiy replied to Bodo Schütze's discussion Errors with 3s RAW image trigger time @ Phantom 4 PRO in the group UgCS
"Hi Bodo, DJI accepts only integer values for interval between shots. You can check DJI SDK documenation if you don't want to trust me and to our team. So we have to round calculated interval to some integer value. We prefer to round to lower…"
Jan 29
Alexey Dobrovolskiy replied to Bodo Schütze's discussion Errors with 3s RAW image trigger time @ Phantom 4 PRO in the group UgCS
"And regarding rounding. You are right, calculated value round to near lower integer value, and this is right from photogrammetry point of view. Please remember that time between shots is calculated based on desired forward overlap of images. In your…"
Jan 25
Alexey Dobrovolskiy replied to Bodo Schütze's discussion Errors with 3s RAW image trigger time @ Phantom 4 PRO in the group UgCS
"Hi, you can change minimum triggering interval in camera profile. Go to Main Menu, Payloads, find your camera, enter 2s to Minimum triggering interval field, click Save."
Jan 25
Alexey Dobrovolskiy commented on Kristaps Brass's blog post Lego Sorter [Prototype] by SPH Engineering
"Ideal lego sorter should be integrated with vacuum cleaner... We will work in this direction :)"
Jan 2
Alexey Dobrovolskiy replied to Robert Matthews's discussion Track Log export in the group UgCS
"Please check that %JAVAPATH% variable resolved to full path to java.exe. As alternative you can edit tlm2kml.bat and enter full name of java.exe to the last line instead of %JAVAPATH%."
Jan 2
Alexey Dobrovolskiy replied to Robert Matthews's discussion Track Log export in the group UgCS
"Hi Robert, Happy New year to you too. From UgCS you can export telemetry to binary .tlm file. This file can be converted to KML using UgCS telemetry tool. Documentation for it here…"
Jan 1
Alexey Dobrovolskiy commented on Kristaps Brass's blog post Lego Sorter [Prototype] by SPH Engineering
"It's the first prototype built to have all components connected and working. As you can see on the video we have implemented a simple linear common control algorithm. We think that we can reach a performance of 2-5 bricks per second. A neural…"
Dec 30, 2017
Alexey Dobrovolskiy replied to Olaf's discussion mistake installing UgCS v 2.12 in the group UgCS
"You can try UgCS 2.11 - https://www.ugcs.com/en/page/version-2-11-update-1 It's last version with Win32 support."
Dec 29, 2017
Alexey Dobrovolskiy commented on Kristaps Brass's blog post Universal Adapter for DJI Cameras / Gimbals
"Hi, yes, but you will need to write couple lines of code. You can modify this module - https://github.com/airmast/attitude-feeder - and trigger camera using CamAdapter API."
Dec 29, 2017
Alexey Dobrovolskiy replied to Anne Sophie's discussion Open-source GCS on a commercial drone
"Hi Anne, lot of commercial drones use Pixhawk-compatible controllers with ArduPilot or PX4 firmware. You can use Mission Pilot or QGroundControl with them. Last sample is Yuneec h520. Some manufacturers of commercial drones or autopilots can provide…"
Dec 29, 2017
Alexey Dobrovolskiy commented on Kristaps Brass's blog post Universal Adapter for DJI Gimbals
"After long-long delay caused by other projects, camera adapter software and all documentation are ready - https://www.ugcs.com/en/page/airmast-camadapter"
Dec 18, 2017
Alexey Dobrovolskiy replied to Marcin's discussion How to mount Sony a6000 to tarot 650 in the group Terrain/Surface Mapping
"Hi, it looks not bad. Of course if they use plastic of good quality. "
Dec 15, 2017
Alexey Dobrovolskiy replied to Marcin's discussion How to mount Sony a6000 to tarot 650 in the group Terrain/Surface Mapping
"Hi Marcin, currently we don't have any birds with fixed mount in our fleet. I just answered that for mapping and DEM generation fixed mount will be enough."
Dec 12, 2017
Alexey Dobrovolskiy replied to Marcin's discussion How to mount Sony a6000 to tarot 650 in the group Terrain/Surface Mapping
"We don't have. I'm sorry."
Dec 12, 2017

Profile Information

Please tell us a bit about your UAV interest
I'm working for SPH Engineering - developer of UgCS - ground control software in Latvia.
Hometown:
Riga

Alexey Dobrovolskiy's Blog

Multiple drones and multiple operator support in U[g]CS

Posted on December 26, 2013 at 12:03am 2 Comments

 

Here is footage from software showing our software capability to simultaneously plan and execute mission with 3 different drones. Arducopter, Microdrone MD4-200 and Mikrokopter were used.

As we support at this moment Arducopter, Mikrocopter, ArDrone, Microdrone this demo can be interesting at least for professional users of…

Continue

Comment Wall (6 comments)

At 11:11am on April 17, 2015, Mike Governale said…

Thanks Alexey...  and good luck with your latvian farmers.

We carry a modified Canon PowerShot A810 (with standard lens) for the NDVI imagery.  We fly the same mission with another "unmodified" A810 to capture the 16 mp images.

We use Kolor's AutoPano Giga for stitching the images and process the NDVI with a plugin on ImageJ software.

For small crop acreage using our Y6 frames, we have found that 170feet altitude and 17mph speed provides the best stitching image resolutions desired while still leaving plenty of battery life for a safe return to home.  Our flight program triggers image captures by distance covered (and not triggered by way points) and we have flown this configuration in varying direction 20mph winds without loosing images because we exceeded the PowerShot A810 2.5 second refresh rate.

At some point, we hope to be able to afford using (and risking, if you know what I mean) modified cameras with a much larger sensor area (like a Sony Nex 6).  This would allow us to fly lower and/or faster with the same resolution.

We will stay with the cheaper cameras for now because satisfy requirements.  We are starting to test using our Skywalker's (1900 mm motorized gliders) for larger acreage surveys.  With these we have greater flight times, but the challenge is how to fly slow enough and low enough.

As you must know....   it is a continuous learning experience while trying to balance the costs, etc.

I hope this was somewhat helpful.

Mike G.

At 3:34pm on April 24, 2015, Alexey Dobrovolskiy said…

Thanks Mike,

could you tell also is GSD important for NDVI calculation? 

At 1:01pm on December 10, 2015, Ali said…

hi, there, I have seen a picture from power line inspection.

that was very clear and low noisy.

I want to know about your flight plan. the height, ortho imaging or oblique,

the distance from power line axis and the coverage of images(side coverage and along coverage). i tried that and have processed my data with pix4d but the result was not as the same as your pictures.

At 1:35pm on December 10, 2015, Alexey Dobrovolskiy said…

Hi,

as I remember it was ortho, altitude over line about 10 meters, distance from power line axis about 10 meters too.

And we make too much photos, processing time was about full day and night, but quality was perfect.

At 8:05am on December 11, 2015, Ali said…

thank you so much, by the way, can i ask you about your camera type.?

At 8:19am on December 11, 2015, Ali said…

sorry one more question.

i want to know about number of flight path in direction of power line.

i guess it must be two. with 10 meters distance from both sides of power line.

if its more please tell me.  

yours truly

Ali

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