Alexey Dobrovolskiy
  • Male
  • Riga
  • Latvia
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Alexey Dobrovolskiy's Groups

Alexey Dobrovolskiy's Discussions

WiFi 5Ghz telemetry module for Pixhawk

Started Jun 10 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 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. "
Friday
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."
Wednesday
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."
Tuesday
Alexey Dobrovolskiy replied to Marcin's discussion How to mount Sony a6000 to tarot 650 in the group Terrain/Surface Mapping
"Hi, for mapping and DTM fixed mount works pretty well."
Tuesday
Alexey Dobrovolskiy replied to Robert Matthews's discussion Terrain Following / DEM issue in the group UgCS
"Thank you Robert. Do not hesitate to ask us in case of any questions/problems."
Tuesday
Alexey Dobrovolskiy replied to Joshua Stubbs's discussion Pixhawk min. temperature
"Our chief electronics engineer just told me that each autopilot should be calibrated individually. This requires a thermal chamber. I'm sure that manufacturers of inexpensive autopilots do not do this."
Monday
Alexey Dobrovolskiy replied to Joshua Stubbs's discussion Pixhawk min. temperature
"From formal point of view Pixhawk (at least old one manufactured by 3DR in past) uses components rated for industrial range from -40°C. It seems that root of problems is in thermal calibration of sensors. Sensors should be calibrated for whole…"
Monday
Alexey Dobrovolskiy replied to Robert Matthews's discussion Terrain Following / DEM issue in the group UgCS
"You are right, we have data with 3 arc second resolution out of the box. So if you have 1 arc second or better data you can benefit from UgCS Pro."
Monday
Alexey Dobrovolskiy replied to Robert Matthews's discussion Terrain Following / DEM issue in the group UgCS
"Hi Robert,in latest versions we introduced new Photogrammetry tool parameter called AGL tolerance. If you will reduce it from your current 1m to say 0.5 meters you will get lot of additional waypoints and better terrain following.May be this is…"
Dec 10
Alexey Dobrovolskiy replied to Robert Matthews's discussion Terrain Following / DEM issue in the group UgCS
"Robert, I still don't see issues with this mission.  This is elevation profile with directional angle 45 for route NE1 and for directional angle = 0 and last route is more optimal - less waypoints and flight time"
Dec 10
Alexey Dobrovolskiy replied to Joshua Stubbs's discussion Pixhawk min. temperature
"From our experience -10 °C is absolute minimum for all Pixhawk varietes what we had in hands. The same for ESCs from different manufacturers. And for DJI avionics too.You can use you drones below -10, but you should do all preparations in your…"
Dec 10
Alexey Dobrovolskiy replied to Robert Matthews's discussion Terrain Following / DEM issue in the group UgCS
"Hi Robert, could you save your mission to file (xml) and post it here or send to our support? It's hard to understand what is wrong here having screenshots only."
Dec 10
Alexey Dobrovolskiy replied to John's discussion Best flight controller for ariel photography
"Hi, please see autopilots comparation - exactly for survey missions https://www.ugcs.com/en/page/comparing-precision-of-autopilots-for-survey-missions Most precise were Pixhawk + PX4 firmware and new DJI's (Phantom 4 etc)."
Nov 8
Alexey Dobrovolskiy replied to antonio's discussion DJI N3 + remote Shutter UGCS in the group UgCS
"Important addition. Only this method (trigger in waypoint) will work. Camera by time action works only with "native" DJI cameras."
Nov 8
Alexey Dobrovolskiy replied to antonio's discussion DJI N3 + remote Shutter UGCS in the group UgCS
"Hi, I seems that we have good news for you. We managed to configure camera trigger with A3, I hope that with N3 will be the same. 1. You need to have latest DJI firmware loaded to all components. 2. In DJI Assistan 2 configure some port as…"
Nov 8
Alexey Dobrovolskiy replied to Jason Franciosa's discussion Running multiple vehicles on one computer
"Hi, try UgCS. UgCS Open (free version) allows to control any number of vehicles. Of course there are practical limits, but in software we don't have any limitations for number of controlled vehicles. You should set different NetID for each pair…"
Nov 4

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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