| Название | : | GPS module showdown do-over with full precision and two more modules (Neo-6M and BN880Q) |
| Продолжительность | : | 29.59 |
| Дата публикации | : | |
| Просмотров | : | 12 rb |
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Super nice view you got down there! Comment from : timekiIIr |
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Great and comprehensive comparison!brWould be awesome to see a comparison between the newer Beitian models (BK with M9 and BE with M10) and maybe also the more expensive Matek SAM-M10Q Did you get to use any of those? Comment from : F14V |
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Nice, thank you Are all the GPS configured in the same way? Comment from : Paul Bizard |
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wow, what a great job of representing data! thanks for this masterpiece! Comment from : Scotty Austria |
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This is why we tend to use an offset when working with geo data, the points you're using are seldom far apart, so that way you can have high precision, even when just using floats Also, converting between projections (wish there was just one to rule them all - *sigh*) you loose precision, even when using doubles, since there's so many intermediate calculations Comment from : Brynjard Øvergård |
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Just need to mention that almost all the modules you use have a ceramic antenna patch that is usually connected to a single chip amplifier directly on the feed into the board This basically makes "active antenna" moot Comment from : 1kreature |
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That is not normally Comment from : Buzz Cola |
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Nice and detailed test, thanks for the effort you put in! Comment from : M Bakker |
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your job is very good Comment from : Gustavo Risuenho |
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how you are getting 10hz from neo-6m it only support 5hz max Comment from : Deepak |
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hello sir, nice video thank you Would you tell me what software u use for track visualization? its help a lot for me thank you Comment from : Rafid Munawir |
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Ah, a good ol' quantization bug Now you know the pattern for the future at least (if that's a comfort) :PbrThe modules have different accuracies at different refresh frequencies, you should probably see different patterns at 1Hz than at 10Hz Comment from : Brynjard Øvergård |
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hi chris, I'm still using your iforce2d editor, which is great but you're website has no valid ssl certificate Maybe you can fix that Thank you, great content and great editor Comment from : RagdollRocket |
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Excellent comparison! I use the Matek “M8Q”do you happen to know if that is actually a different module, or is it essentially a M8N? Comment from : Av8orn8 |
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Are you OK, 3 Months is a long time We need more of your Videos Comment from : Barry Cole |
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Hi, will there be a video again soon? Your videos have always been so entertaining and instructive! I feel withdrawal symptoms Comment from : Christian Schulz |
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Awesome vid, thanks mate! Comment from : Kolibri FPV |
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I wonder if I could ask you for some help? I have two F2s Flight controllers both of which lost their GPS pucks in crashes last year I've tried all over but cannot get replacements unless I get one's similar that need various changes making which I don't understand about! Can I email you about this please? Best regards Nick Comment from : Nick Twinn |
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Right now I'm watching a lot of your older video series again, like the Farm Rover or the ardupilot experiments I am right to say that if you did this again, would you get significantly better results after discovering this accuracy problem? Thank you very much for sharing your experiences! Comment from : Christian Schulz |
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Super interesting thanks! Can you do a comparison with an M8P utilising RTK? Your previous video on RTK showed an improvement but it'd be great to see this detailed analysis Comment from : John Mooney |
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Brilliant work Professor 2D Comment from : Andrew Newton |
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10:42 When rain is large drops it never lasts very long Comment from : Gary Hawkins |
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This is such brilliant stuff, thanks for doing this testing I'm probably crazy, but this is actually very reassuring for how I'm using my pile of BN-180 and BN-220 units, because being within 5m is more than adequate for my uses, but knowing that the M8P would be worth it for position hold navigation is exactly what I'd want to run Comment from : tehllama42 |
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Looks like the M8P is doing 5hz? Comment from : foxabilo |
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Floating point precision is a rake that every programmer steps on don`t get me started on FP equality comparison and denormals, those are equally "fun" Comment from : Gatis Ozols |
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*metre, not meter Comment from : HeathLedgersChemist |
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👍👀🇭🇷 Comment from : Drone Playground |
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A very comprehensive and well explained video Thanks for efforts of finding breaks in the weather Being in Melbourne (AUST) I understand your pain this time of year Have you thought of doing the test against an RTK setup to show the advantages of an RTK? I realise that this is quite expensive, although not as bad as it used to be Just a thought as it would provide a good control signal Thanks for your videos Comment from : Allan Winning |
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what is this visual software used for STM programming? Comment from : Dmitry633 |
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Amazing work! Thanks for sharing Comment from : Francesco Bianchi |
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WowMuch better details/data Thanks Chris Comment from : Lasersbee |
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Man did you see that double rainbow Comment from : Thirtythree Eyes |
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Glad my comment was useful! Your comparison is now by far the best I’ve seen, loving all the visualizationsbrbrBut again the poor performance of the BN-880 is surprising to me along with the decent performance of the 7M Maybe my 7M is a fake and just a 6M? The decent performance of the BN-880Q just makes it more confusing I guess I’ll have to look closer at my past data againbrbrAnd yes, my username is a Monty Python reference as a result of my name being Tim Chant and thus I’m often called the 'electronics enchanting wizard' Comment from : WizardTim |
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19:37 - Dang! You could use the yellow/red dots to (seems like a matched pair in terms of resolution, sample-rate, lag, etc) to also determine the absolute heading of a thing without relying on compasses Comment from : आदित्यAditya मेहेंदळेMehendale #BringBackDislikes |
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Good, but I miss to compare same with RTK fixed station, that should be on another level But need the long range wifi or other way to transmit this information to the modules tested Comment from : johthe |
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Wow, impressive data analysing!brGreat walkthrough of the errorsbrGreat jobbrThanks for sharing your experience with all of us 👍😀 Comment from : Asger Vestbjerg |
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If you could add support for non UBX mode GPS modules, this could be a real series There are so many different GPS chipsets out there so it would be very interesting to see a comparison The other problem is trying to have many UARTs available to simultaneously test multiple modules Thanks! Comment from : Daniel Wee |
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Goddamn that's fascinating! Comment from : mistercohaagen |
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Did you say the M8P uses an active antenna? In your last video? Comment from : David Hannigan Jr |
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We had the same crappy weather over in Qld a few days back, now it's cold as (well, for sunny Qld anyhow) Comment from : Jeff Bluejets |
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I love how much detailed info you're able to cram into this, and yet still make it so easy to follow and understand! lol I've used several of these GPS modules for my flying over the years and never really noticed much in the way of accuracy or performance differences, other than some of them lock much quicker than others at start up lol That said, this makes it clear to me that uBlox is probably the way to go, especially the M8N seems to be a good performer I don't think I've seen a module targeted for FPV with the M8P, or maybe I wasn't paying attention if I did ;) Excellent job! Comment from : bonafidepirate |
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On Comma Ai's Github there is an interesting project Laika Comment from : JoneKone |
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This is just so interesting Thank you for sharing, it's inspiring to see Comment from : poobertop |
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Brilliant exploring and visuals and great data set and explanations Pretty sure the best I’ve seenbrbrI wouldn’t say mistakes made, just the raw process of learning exposed It’s courageous of you to put out videos that are impossible to edit once published (youtube is an interesting and somewhat scary medium to share original content)brbrAt 13:35 you say separating into “two groups”, I see 3 distinct groupsbrThe heat-map plots at 16:44 and 15:30 really highlight the accuracy of data collected from individual unitsbr• Group1 { MSP, M8N, 7M } … most consistent position databr• Group2 { BN180, BN880, BN880Q }br• Group3 { BN220, 6M } … least consistent position databrbrA merged overlay for each of the 3 groups would really show similarity of GPS units in each group, and contrast the 3 groups (or levels of accuracy, consistency) brbrFor “true GPS” reference position, you might want to do weighted average of the 3 groups, something like a 3, 2, 1 weight, or 2, 1, 1 weighting This weighted average “true GPS” reference position may better highlight the inaccuracies of individual units Weighted average would help reduce the “smudging” effects you mention at 28:57 from the less accurate GPS unitsbrbrBTW: At 27:50 … Are you sure it’s the 7M that’s off, not the 6M? Like you said, I’m expecting the 6M to be one doesn’t belong in this group (Group1 as I noted above) See 7M vs 6M at 14:40 … that seems to contradict the plot(s) at 27:50brbrI’m a bit sad as just received 3x BN220 units that I ordered 3-4 weeks ago Have to thank you in advance, as your results will save me some future head aches Also thinking to set up a similar experiment to test my 3 BN220 modules for my region Likely a winter project, as I’ll just use the units for now, having better insights Many thanks for sharing your deep dive into GPS data Comment from : Aerial Waviator |
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No kidding Chris great data Thanks Comment from : Mark Greco |
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Hard to believe I’m the first to say thumbs up to the spermatozoa races 😂 Comment from : Mark Greco |
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Fantastic analysis Thank you for revisiting this! Comment from : Alex Scarbro |
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Your visualisations are very clear and informative! Great work! Thank you! Comment from : blacklion79 |
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This is amassing work M9P is really the best choice period now fantastic video Comment from : Mads Tech |
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18:00 I have no idea about it but that looks pretty cool 👍 Comment from : DIY with Batteries |
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Now I know why my fixedwing always change circle point in loiter mode using 6m But everytime my wireless PIR doorbell triggered it will cause my gps loses all satellites Comment from : skelethorn bro |
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your weather is just like england, thanks for the correction video, If you can find the fence post on google earth can you tell which gps was closest ? Comment from : Steve Mann |
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Fascinating stuff! I've learned a lot from your video's so thank-you for making them A couple of things spring to mind thoughdid you really get the 6M to output data at 10Hz? I thought it was only capable of 5Hz max I'm not doubting you but would like to know how you did that The other thing about the 6Misn't it GPS only? I don't know about the others but to be fair it does have a disadvantage at only getting GPS data, which kind of means it didn't really do too bad considering I'm probably wrong on both accounts but whateverthanks again for the fantastic info, a real gold mine Comment from : MrToM |
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This is by far the most comprehensive and detailed evaluation I’ve seen Great work Comment from : Reach41 |
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It'd be interesting to see C/N0 and pseudorange performance metrics between the different modules Seeing pseudorange variation for the same PRN/Frequency between the various modules would be a good indicator of the tracking loop performance for the various modulesbrSome of performance issues on the lower performing modules could be from bad measurements for satellites (multipath, bad Iono/tropo, etc) Checking for multipath in the measurements would be interesting There should be a few chips of variation between the multipath signals and the regular signals (on the same PRN different Freq), accompanied by a lower than average C/N0 if they're present Comment from : Fur Eter |
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You should try the ATGM336H module, I've seen some good written reviews about it, but there is so little documentation about it, it can track the Chinese constellation too, some people claiming that they sometimes caught 20 satellites with it Comment from : Zeusbeer |
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i alway like the video fist, because i know i'll enjoy it Thanks Comment from : J van der Meulen |
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that was just what I needed thanks Comment from : Alper |
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