--- Log opened Fri Jun 20 00:00:09 2014 00:07 -!- astr [~astr@79-69-197-112.dynamic.dsl.as9105.com] has joined #navit 00:45 #navit: < astr> nighty night 00:46 #navit: <@KaZeR> good night 00:50 #navit: < astr> did you get my links? (dogge internet) 00:50 #navit: < astr> this one looks like the one maplin sell http://www.aliexpress.com/item/Computers-USB-GPS-Receiver-USB-Adapter-for-sale-free-shipping/620985029.html 00:50 #navit: < astr> I'll read any replys when I get up 00:57 #navit: <@KaZeR> i did not get the link before 00:57 #navit: <@KaZeR> my concern with this kind of device is that you have no idea of the compatibility before buying it 00:58 #navit: <@KaZeR> i once bought a touchscreen like this. there was "drivers" for "linux". they never worked correctly. cp15 ended up patching another driver https://bugs.freedesktop.org/show_bug.cgi?id=13840 00:59 #navit: <@KaZeR> it barely worked, then the backlight blew. i bought another panel to try to fix it. in the end i just wasted ~$350. way more than buying a lilliput directly. and would have saved me a lot of headaches. 00:59 #navit: <@KaZeR> but it's just my 2c :) 01:11 #navit: <@KaZeR> have to go. ++ 01:11 -!- KaZeR [~kazer@64.201.252.132] has quit [Remote host closed the connection] 03:55 -!- nate` [~west@unworkable-box.nb.kolo.net] has quit [Ping timeout: 240 seconds] 03:57 -!- nate` [~west@unworkable-box.nb.kolo.net] has joined #navit 06:57 -!- woglinde [~henning@fb-n15-11.unbelievable-machine.net] has joined #navit 07:00 -!- Robotaxi [3ef5dbf5@gateway/web/freenode/ip.62.245.219.245] has joined #navit 08:45 -!- drlizau [~liz@billiau.net] has joined #navit 08:59 -!- drlizau [~liz@billiau.net] has quit [Remote host closed the connection] 09:00 -!- drlizau [~liz@billiau.net] has joined #navit 09:58 #navit: < astr> each time I find a usb gps dongle I find it's out of production and so hard to find 09:58 #navit: < astr> correction: and there for hard to find 11:40 #navit: < nate`> That's why I use a beagle along with aida fruit's ultimate gps 12:07 -!- drlizau [~liz@billiau.net] has quit [Remote host closed the connection] 13:30 #navit: < astr> nate`, I see some usb gps's say 20 tracking channels and 60 channels. what does this mean and whats the minimal numbers I need. 13:32 #navit: < astr> and what about 10 Hz updates whats the difference with devices that have 1hz updates? 13:33 #navit: < astr> some dongels from direct form china say this "1.Excellent GPS performance without the need to use an USB Extension Cable 13:33 #navit: < astr> 2.Majority of the USB GPS dongles in the market require an USB extension cable to be used to extend the GPS 13:33 #navit: < astr> antenna away from the laptop or a GPS position fix may not be obtained or takes forever to obtain a position fix. 13:33 #navit: < astr> This is due to the fact that notebook / laptop produces electrical interference that weakens the GPS signal in the 13:33 #navit: < astr> nearby vicinity. " 13:34 #navit: < astr> what do you think of that. sorry that was a long quote 13:38 #navit: < astr> some usb gps dongles are also loggers. Is this of any use for navigation. for example. the pockect computer it's pluged into is if but it is powered up and logging. then the computer is switch on and is able to instanly get your position as the gps has allreadly got it and it is able to show you where you have been using the gps's built in log 13:38 #navit: < astr> correction: into is off 13:38 #navit: < astr> but the gps is powered up and logging 13:40 #navit: < astr> I guess the hz is how many times a sec it updates/get your position 13:48 #navit: < astr> agps is a software thing right? not a hardware thing? 13:49 #navit: < astr> not related to gps hardware that is, uses a mobile modem 14:47 -!- ZeroOne01 [~ZeroOne01@81.189.57.6] has joined #navit 15:55 -!- Robotaxi [3ef5dbf5@gateway/web/freenode/ip.62.245.219.245] has quit [Ping timeout: 246 seconds] 16:08 -!- KaZeR [~kazer@64.201.252.132] has joined #navit 16:08 -!- mode/#navit [+o KaZeR] by ChanServ 16:18 -!- woglinde [~henning@fb-n15-11.unbelievable-machine.net] has quit [Ping timeout: 245 seconds] 16:38 -!- pini [~pini@bou-fi.pustule.org] has quit [Read error: Connection reset by peer] 16:40 -!- pini [~pini@bou-fi.pustule.org] has joined #navit 16:45 -!- ZeroOne01 [~ZeroOne01@81.189.57.6] has quit [Read error: Connection reset by peer] 17:00 -!- j_f-f [~quassel@orion2589.server4you.de] has quit [Remote host closed the connection] 17:03 -!- j_f-f [~quassel@orion2589.server4you.de] has joined #navit 17:53 -!- KaZeR [~kazer@64.201.252.132] has quit [Remote host closed the connection] 17:55 -!- KaZeR [~kazer@64.201.252.132] has joined #navit 17:55 -!- mode/#navit [+o KaZeR] by ChanServ 18:03 #navit: < astr> hi'a KaZeR 18:05 #navit: <@KaZeR> hey astr 18:08 #navit: < astr> KaZeR, I've got a load of questions, have a look in todays log :D if you can face it, do mind... thanks http://irclogs.navit.ie/%23navit-2014-06-20.log 18:08 #navit: < astr> don't mind 18:08 #navit: <@KaZeR> sure give me a few 18:09 #navit: < astr> KaZeR, I see some usb gps's say 20 tracking channels and 60 channels. what does this mean and whats the minimal numbers I need. 18:10 #navit: <@KaZeR> you'd be fine with 4. anyway as i explained yesterday : you can get devices which advertise tracking of 30+ sats but you usually won't be able to use more than 7-8 because of their orbit 18:10 #navit: <@KaZeR> (that's for GPS) 18:10 #navit: < astr> oh thanks 18:12 #navit: <@KaZeR> according to wikipedia there's currently 31 satellites in orbit anyway 18:12 #navit: < astr> hu 18:12 #navit: <@KaZeR> excellent explanation : http://en.wikipedia.org/wiki/File:ConstellationGPS.gif 18:12 #navit: <@KaZeR> "A visual example of a 24 satellite GPS constellation in motion with the Earth rotating. Notice how the number of satellites in view from a given point on the Earth's surface, in this example at 45°N, changes with time" 18:13 #navit: < astr> HZ is how many times a sec the gps updates the coordinates it gives you? 18:13 #navit: <@KaZeR> yes exactly 18:14 #navit: <@KaZeR> 10Hz is good for really high speed tracking, but i don't think it's widely used. updating the map and checking your route already takes some time 18:15 #navit: < astr> would you 1hz is enough for driving (I havn't had driving lessons yet to give you an idea) 18:15 #navit: <@KaZeR> yeah when driving 1Hz is sufficient 18:15 #navit: <@KaZeR> 2-5Hz would give a smoother motion, but you can forget that on some low power device like the raspberry pi 18:16 #navit: <@KaZeR> i can try to record a video of navit running at 1Hz this week-end if you're interested 18:16 #navit: < astr> so I guess if your flying then 10hz is needed 18:16 #navit: < astr> I think I can image what 1hz is like. but thanks for the offer 18:16 #navit: <@KaZeR> well it depends. if you're flying a plane i think that 1Hz would be sufficient too, because with sky corridors you have a lot of room. if you're flying an r/c plane then it's different 18:17 #navit: < astr> imagine 18:17 #navit: < astr> oh 18:20 #navit: < astr> I guess the small distances matter with a rc things, like a autonomous quardchoptor 18:21 #navit: < astr> hehe 18:22 #navit: < astr> I'm struggling to find branded gps that have more than 1hz. Been doing most of my searching on aliexpress, as thats been more productive. I don't buy from evilbay or amzombie 18:23 #navit: < astr> tried maplin has one form china but less specs then the sellers on aliexpress 18:23 #navit: < astr> ! 18:24 -!- KaZeR [~kazer@64.201.252.132] has quit [Remote host closed the connection] 18:25 -!- KaZeR [~kazer@64.201.252.132] has joined #navit 18:25 -!- mode/#navit [+o KaZeR] by ChanServ 18:26 #navit: <@KaZeR> if you're comfortable with some basic electronics you can also by a gps chip, it's really cheap ( $10-$20 ) 18:27 #navit: < astr> but then it gets bulky as I need the rest of the bits,circuity to go with it 18:29 #navit: < astr> I expect a dongle I buy to be more compact also more robust, and with it being usb I can reuse it for other things easy, just unplug it. 18:31 #navit: <@KaZeR> good point 18:32 #navit: < astr> some usb gps dongles are also loggers. Is this of any use for navigation. for example. the pockect computer it's pluged into is off but it is powered up and logging. then when the pocket computer is switched on it is able to instantly get your position as the gps has already got it and it is able to show you where you have been using the gps's built in log 18:35 #navit: <@KaZeR> you don't need the logging function for that, if your gps device is already running it doesn't wait for a client to connect to get a fix 18:36 #navit: <@KaZeR> the logging is really about keeping a track, it does not help faster startup time 18:45 #navit: < astr> sorry I also ment that it could show you history of the past miles one has walked with out having to especially import the log 18:45 #navit: < astr> I ment cus it was one you would avoid the 30sec start time and with the tracking.... see above 18:46 #navit: < astr> one=on 18:49 #navit: < astr> some gps receivers say they support agps: isn't that a software feature on the computer the receiver is plugged into which also has a Mobile internet modem connected? 18:50 #navit: <@KaZeR> with out having to especially import the log ? 18:51 #navit: <@KaZeR> yes agps is assisted gps, basically, it can push a more recent ephemerid and it makes the boot faster 18:51 #navit: < astr> yes 18:51 #navit: < astr> ok 18:52 #navit: < astr> so agps is a firmware feature of the gps receiver 18:52 #navit: < astr> ok 18:54 #navit: < astr> for driving whats the minimum CEP? 1m ,3m , 5m? 18:54 #navit: < astr> 1-3m I guess 18:55 #navit: <@KaZeR> CEP ? 19:00 #navit: < astr> https://en.wikipedia.org/wiki/Circular_error_probable 19:01 #navit: < astr> KaZeR, the Accuracy 19:01 #navit: <@KaZeR> ah ok 19:02 #navit: <@KaZeR> mmm. for driving most of the time a few meters would be fine, excepted in dense urban areas. when it's obviously harder to get better accuracy ;) 19:03 #navit: < astr> arr yea 19:08 #navit: < astr> KaZeR, thank you very much. you have been a _huge_ help. I think thats all my questions for now 19:08 #navit: <@KaZeR> my pleasure 19:09 #navit: < astr> KaZeR, oh other shops to look for gps receivers? 19:09 #navit: < astr> to look at for 19:10 #navit: <@KaZeR> you're in UK, right? 19:10 #navit: < astr> yep 19:12 #navit: <@KaZeR> mmm. i know a shop, but it's in us so the shipping would probably make it a not so good deal 19:12 #navit: <@KaZeR> amazon could be an option too 19:20 #navit: < astr> but for the fact that I don't want to buy from amazon corp :P 19:20 #navit: < astr> ok, thanks then 19:21 #navit: < astr> could the HZ be reduced by the circuity around the gps receiver chip? 19:21 #navit: < astr> KaZeR, 19:21 #navit: <@KaZeR> i'm not sure i understand your question 19:21 #navit: <@KaZeR> your concern is to get a 10Hz device to work at 1Hz ? 19:22 #navit: < astr> no 19:23 -!- woglinde [~henning@g225077218.adsl.alicedsl.de] has joined #navit 19:24 #navit: < astr> I was looking at a manufactures docs and they say 50hz. the selller doesn't say the hz or the chipset model but they say the maker of the chipset. so I was wondering if most of the gps chips there using can do a higher HZ but the other circuity limits the HZ to a lot less 19:27 #navit: <@KaZeR> that's a good question. i've never seen 50Hz GPS on the market though 19:28 #navit: < astr> KaZeR, http://www.skytraq.com.tw/products/Venus838FLPx_PB_v1.pdf 19:28 #navit: < astr> right dinner 20:27 -!- drlizau [~liz@billiau.net] has joined #navit 20:28 #navit: < astr> back 21:06 -!- KaZeR [~kazer@64.201.252.132] has quit [Ping timeout: 240 seconds] 21:08 -!- drlizau [~liz@billiau.net] has quit [Remote host closed the connection] 21:21 -!- KaZeR [~kazer@172.56.40.181] has joined #navit 21:21 -!- mode/#navit [+o KaZeR] by ChanServ 21:48 -!- kazer_ [~kazer@172.56.40.181] has joined #navit 21:48 -!- KaZeR [~kazer@172.56.40.181] has quit [Read error: No route to host] 22:09 -!- woglinde [~henning@g225077218.adsl.alicedsl.de] has quit [Ping timeout: 240 seconds] 22:11 -!- kazer_ [~kazer@172.56.40.181] has quit [Ping timeout: 240 seconds] 22:24 -!- tryagain [~quassel@178.216.76.45] has joined #navit 22:27 -!- kazer_ [~kazer@64.201.252.132] has joined #navit 22:51 -!- kazer_ [~kazer@64.201.252.132] has quit [Remote host closed the connection] 23:46 -!- tryagain [~quassel@178.216.76.45] has quit [Remote host closed the connection] --- Log closed Sat Jun 21 00:00:09 2014