d j
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Latest Activity

d j posted a status
"Boeing 737 MAX 8 MCAS sensor explained…"
Apr 3
d j posted a status
"Join Peer to Boeing 737 MAX 8 ‏ @Project"
Apr 2
d j commented on Chris Anderson's blog post Pixhawk-based navigation using ADS-B transponders instead of GPS
""But GPS signals can be easily blocked by tall skyscrapers or trees — leaving drones lost." and exactly signals from ADS-B transponder can be easily blocked by tall skyscrapers or trees — leaving drones…"
Sep 1, 2018
d j posted a status
"5G wide-area private free cell telephony systems based on 2.4GHz and 5GHz WiFi coverage"
Aug 21, 2018
d j commented on Nicolai Valenti's blog post Projecting Hybrid aerial vehicle for human transport
"@Nikolai, don't waste time on so called "great ideas" To save on fuel, passenger drone should be built as  blimp + drone hybrid design to make it lighter than air. Otherwise money is lost since fuel is not for free."
Aug 4, 2018
d j commented on Nicolai Valenti's blog post Projecting Hybrid aerial vehicle for human transport
"I have talked to Ehang 5 years ago. For stability and safety, rotors should be raised and put at roof top level or above like in real helicopter or drone."
Aug 2, 2018
d j commented on Bernardo Espinosa's blog post Low cost L1+L2 GNSS RTK used for painting football fields
"Chris, anything burried in the ground is very old technology, which never worked fine. Footbool industry is worth Billions $$$, so what makes business is high precision GPS navigation. For my lawn mower rover I can use L1 RTK receiver, fine tuned…"
Jun 12, 2018
d j commented on Bernardo Espinosa's blog post Low cost L1+L2 GNSS RTK used for painting football fields
"@Bernardo, your GPS robot for painting football fields is great technology and pricing is ok for the dfootball industry. In case of battery operated electric lawn mower I need to cut price of add-on like your GPS tracking and control. I studied…"
May 29, 2018
d j replied to Laser's discussion what's the problem?
"There is a single directory missing , line starting with [100%] ( read my above reply) look at your screenshot above: generating creating cannot create -- what comes next is follow-up to the above bug use your preferred CLI editor and just mdir…"
May 29, 2018
d j replied to Laser's discussion what's the problem?
"ok, just create missing directory CLI manually and run installer once again"
May 27, 2018
d j commented on Greg Crutsinger's blog post Quick overview comparing multispectral sensors for plant mapping with drones
"@Greg could you refer me to printed specification of your multispectral sensors for plant mapping ? If I get 200 meters (single point)  resolution radar scans from ESA satellite I need to overlay them with higher resolution, individual tree…"
May 27, 2018
d j commented on Bernardo Espinosa's blog post Low cost L1+L2 GNSS RTK used for painting football fields
"thank you, I manage 2 projects where high precision GPS is required Trolley Truck and GPS controlled LawnMover Since lawn mover is operating alike your Robot, all I need is to cut GNSS pricing So I hope to test real-time GPS correction as…"
May 27, 2018
d j replied to Laser's discussion what's the problem?
"@Laser look at [100%] lines and verify dependencies manually, unpacking firmware to another target drive creating directory cannot create are clear shell messages for you to check the directory tree manually"
May 25, 2018
d j posted a status
"I build Trolley Trucks for 10 cities"
May 25, 2018
d j commented on Bernardo Espinosa's blog post Low cost L1+L2 GNSS RTK used for painting football fields
"@Bernardo, excellent, my congratulations on your success let me test your Intelligent Marking's robotic sports field painting robot one day"
May 25, 2018

Profile Information

Please tell us a bit about your UAV interest
trolley tracks
Hometown:
London

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