Alexey Dobrovolskiy
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  • Riga
  • Latvia
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Alexey Dobrovolskiy's Groups

Alexey Dobrovolskiy's Discussions

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 commented on Kristaps Brass's blog post Comparing Precision of Autopilots for Survey Missions - DJI Phantom 4
"Phantom 4 is much better than Naza. We already did that test and were surprised by results... We will test almost all our fleet, we have in operational condition at the moment: - Mikrokopter Quadro XL- Microdrones MD4-200- Kestrel Indago  - 3DR…"
Sunday
Alexey Dobrovolskiy commented on Kristaps Brass's blog post Universal Adapter for DJI Gimbals
"Hi Greg, you are absolutely right. DJI gimbal also needs information about aircraft attitude. Now we are experimenting where to get this information. We have only two variants - from autopilot or from IMU inside of adaptor.It seems that we will use…"
Friday
Alexey Dobrovolskiy replied to ActionDrone's discussion PX4 in the group UgCS
"Here is info about issue in PX4 firmware - https://github.com/PX4/Firmware/issues/6703"
Mar 16
Alexey Dobrovolskiy commented on Kristaps Brass's blog post Universal Adapter for DJI Gimbals
"Weight is 353g without camera. With Z3 weight is 620g."
Mar 12
Alexey Dobrovolskiy commented on Kristaps Brass's blog post Universal Adapter for DJI Gimbals
"Rob, will see... I can't predict what they will do. I would like not to discuss this topic here... Regarding tech questions. - price. We are talking with potential OEM producers - we are primarily software house and don't want to dive to…"
Mar 9
Alexey Dobrovolskiy commented on Kristaps Brass's blog post Universal Adapter for DJI Gimbals
"For what reason? I'm engineer, not a lawer... but if somebody will tell us that we breach any law - we will stop immediately. We do not copy or steal DJI cameras - we designed additional product. From other side we created additional sales…"
Mar 7
Alexey Dobrovolskiy replied to Jay Lewis's discussion Picture Overlap Percentage vs. Picture by Distance or Time interval in the group UgCS
"Hi! In short - yes, UgCS can everything. Please see this article - https://www.ugcs.com/en/page/photogrammetry-tool-for-land-surveying"
Mar 7
Alexey Dobrovolskiy replied to Cristian Rougier's discussion flight plan in irregular terrain
"Hi Cristian,you can try to find precise elevation data for some areas in Internet, for example ArcticDEM for northern areas. Or if your project is commercial you can buy commercial data like Airbus WorldDEM.UgCS (starting from UgCS Pro) allows to…"
Mar 6
Alexey Dobrovolskiy commented on Bernardo Espinosa's blog post RTF Low Cost Professional Photogrammetry Drone, with GNSS RTK module, PPK, CORS and Ground RTK Support
"Ahh, I'm sorry, now i see same question and your answer above. Thank you."
Mar 6
Alexey Dobrovolskiy replied to Pablo Betancourt's discussion How to change Latvia default's positon of emulators? in the group UgCS
"Hi Pablo, default emulator position you can change in emulator.properties file, string looks like default.home_position=56.976766, 24.073639, 0.0 By default this file resides in c:\Program Files (x86)\UgCS\server\emulator on Windows"
Mar 4
Alexey Dobrovolskiy commented on Bernardo Espinosa's blog post RTF Low Cost Professional Photogrammetry Drone, with GNSS RTK module, PPK, CORS and Ground RTK Support
"Bernardo, this drone uses RTK receiver only for geotagging? On 4th picture I see somethink like muchroom GPS receiver."
Mar 3
Alexey Dobrovolskiy replied to Mark Fink's discussion Launch with DJI Go, focus, then fly with UGCS in the group UgCS
"Hi, UgCS 2.11 beta will be available in few weeks. We finished development and new version is under tests currently. In new version we implemented full exposure control and zoom control for Z3/Z30 cameras. Regarding focus there are nothing good - we…"
Mar 2
Alexey Dobrovolskiy replied to ActionDrone's discussion PX4 in the group UgCS
"Hi Diego, UgCS 2.10 has been published about 3 months ago.. Here is PX4 related document - https://www.ugcs.com/files/PDFs/Manuals/v2.10/Manual_px4.pdf PX4 support is not as comprehensive as for ArduPilot for example, but in each release we will add…"
Mar 1
Alexey Dobrovolskiy replied to donnie menk's discussion DJI ALTITUDE LIMIT
"Donnie, as I know this limit integrated in autopilot firmware and there is no way to overcome it. BTW, I hope that you know that in most countries there is legal limit in 400ft (120m) AGL? For each flight above this limit you should have special…"
Mar 1
Alexey Dobrovolskiy commented on Janis Kuze's blog post Ground Control Points (GCPs) for aerial photography
"Hi, as I remember we used all settings by default."
Feb 20
Alexey Dobrovolskiy replied to Mark Fink's discussion Launch with DJI Go, focus, then fly with UGCS in the group UgCS
"BTW we will implement focus control in UgCS in near future. "
Feb 15

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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