"A few notes about WAAS.The system is primarily about integrity and not accuracy. It's main purpose is to notify users, within ~6 seconds, if accuracy doesn't meet a minimum criteria. This relates to safely landing an…"
John Bond's Discussions
APM 1.0 Kit For Sale
Started this discussion. Last reply by John Bond Jun 2, 2012. 4 Replies 0 Likes
APM 1.0 kit assembled with GPS and compass. It was mounted on a small quad which it flies just fine. I used it to follow the DIYdrones software development, but I won't have much time to devote to…Continue
How to log raw imu data?
Started this discussion. Last reply by John Bond Jul 2, 2011. 2 Replies 0 Likes
I haven't been able to log raw imu data. I'm interested in the accel and gyro data available in the Mission Planner software in Raw Sensor View. The code looks like this data should be able to be…Continue
APM Voltage Specs?
Started this discussion. Last reply by Chris Anderson May 13, 2011. 1 Reply 0 Likes
When the APM is powered from the RC equipment what is the acceptable voltage range? I know it's ~ 5 volts, but 5 volts +/- what?Typical RC servo/radio power is anywhere from 4.5 to 6 volts. Will 6…Continue
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Latest Activity
John Bond replied to Adam Kimberlin's discussion GPS Multipath Error"It certainly sounds like multipath. It can be mitigated by better antenna design and/or receiver processing which tend to add cost, size, and weight. You don't say what you are flying or the type of GPS and antenna used (and budget)…"
John Bond replied to Christian Stallings's discussion UBlox Binary file for Precise Point Positioning (PPP)"Here are the files. Let me know if you have any questions."
John Bond replied to Christian Stallings's discussion UBlox Binary file for Precise Point Positioning (PPP)"I'm assuming you want the data because you don't have a Ublox receiver and are interested in what a L1 receiver can do in PPP mode?
If that's the case I can give you some kinematic data from a ground vehicle if you like. …"
John Bond commented on Doug Weibel's blog post Proof of Concept test - Extremely accurate 3D velocity measurement with a ublox 6T module."The catch for a small rotorcraft is maintaining a continuous carrier phase lock. The electrical noise levels on board can play havoc with this signal. It's possible to mitigate this problem - or maybe you get lucky with your…"
John Bond replied to Ger Harris's discussion Help - Loosing GPS in Mid Flight"Here's what you need:
MiniGPS software (ver. 1.7.1) for Windows.
http://www.gtop-tech.com/jsf/download.jsf
Connection…"
John Bond replied to Ger Harris's discussion Help - Loosing GPS in Mid Flight"To test for electronic interference with your GPS just hook it up to a PC running MiniGPS and look at the SNR bars for the satellites. Does powering up your other electronics reduce the satellite SNR numbers? There's no need to…"
John Bond replied to Steve Zeets's discussion High Accuracy RTK Positions with the LEA-6 using RTCM via NTRIP"The "middle ground" in accuracy for GPS (decimeter-level) can be gotten to via either code or carrier or a combination of both. Differential corrections are required though.
Higher-end boards have better code range measurements and…"
John Bond replied to Steve Zeets's discussion High Accuracy RTK Positions with the LEA-6 using RTCM via NTRIP"1) Look at the accuracy specs. If the specs are cm-level carrier phase data is being used, if meter-level it's code only. There's a middle ground, but I'm trying to keep it fairly simple. If the GPS can do…"
John Bond replied to Steve Zeets's discussion High Accuracy RTK Positions with the LEA-6 using RTCM via NTRIP"A few notes on cm-level GPS.There are basically two levels of accuracy acheiveable with GPS. Meter-level and centimeter-level. Meter-level accuracy relies on C/A code data and centimeter-level relies on carrier phase data. Any…"
John Bond replied to John Bond's discussion APM 1.0 Kit For Sale"Will send payment info by PM when you allow it."
Eric Tweet replied to John Bond's discussion APM 1.0 Kit For Sale"I'll take this off your hands, if you'd like!"
John Bond posted a discussionAPM 1.0 Kit For Sale
APM 1.0 kit assembled with GPS and compass. It was mounted on a small quad which it flies just fine. I used it to follow the DIYdrones software development, but I won't have much time to devote to it over the summer. Includes the box if you want it. $149 shipped in the US.See More
John Bond replied to Rick Eis's discussion MiniGPS"The GPS defaults to NMEA mode at 38400 baud when powered up. It has to be commanded to go into DIYD binary mode which the DIYD software does.
It's simple to talk to the GPS with MiniGPS. You just need the correct connections. …"
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Season Two of the Trust Time Trial (T3) Contest has now begun. The fourth round is an accuracy round for multicopters, which requires contestants to fly a cube. The deadline is April 14th.A list of all T3 contests is here.
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