Need Info on GPS
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Posts: 46,084
Hey everyone!
I want to use GPS to track the flight of my RC plane. Has anyone
done this already and also can anyone suggest any reputable
companies that sell quality GPS modules? I want fairly descent
resolution say less than 2 meters or so (preferably less than 1m
since next I would like to build a robot that uses GPS to navigate
around my yard). Also are there any good sources that document GPS
data logging with a BS2 (BS2p24 specifically).
Many thanks
Arridh
I want to use GPS to track the flight of my RC plane. Has anyone
done this already and also can anyone suggest any reputable
companies that sell quality GPS modules? I want fairly descent
resolution say less than 2 meters or so (preferably less than 1m
since next I would like to build a robot that uses GPS to navigate
around my yard). Also are there any good sources that document GPS
data logging with a BS2 (BS2p24 specifically).
Many thanks
Arridh
Comments
model airplane with a GPS datalogger, then we export the data to Excel
for graphing. We use off-the-shelf Garmin GPS units and live with the
10 meter resolution they provide; you're not going to get any better
than that (I think) unless you setup a differential GPS system.
I've written about GPS twice in my Nuts & Volts column:
http://www.parallax.com/dl/docs/cols/nv/vol3/col/83.pdf
http://www.parallax.com/dl/docs/cols/nv/vol4/col/103.pdf
I believe you will find a file called AeroGPS.BSP in the File section of
Yahoo Groups, though I can't confirm it right now because it's not
letting me in....
-- Jon Williams
-- Applications Engineer, Parallax
-- Dallas Office
Original Message
From: arridh_shashank [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=7lojdJm9QbLqP-MZonQ1Aalkzr69GOmQwCb7ZrMqQutl9VP60ntrpUvXJhSuu-20OcdsT17v4MF2nmJH-v7nXwptxmbncfI]arridh_shashank@y...[/url
Sent: Monday, December 29, 2003 9:00 AM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] Need Info on GPS
Hey everyone!
I want to use GPS to track the flight of my RC plane. Has anyone
done this already and also can anyone suggest any reputable
companies that sell quality GPS modules? I want fairly descent
resolution say less than 2 meters or so (preferably less than 1m
since next I would like to build a robot that uses GPS to navigate
around my yard). Also are there any good sources that document GPS
data logging with a BS2 (BS2p24 specifically).
Many thanks
Arridh
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navigation. I would like resolution down to 1 foot for a robot. Maybe throw
out GPS entirely and use some other triangulation method?
Any advise would be appreciated.
-Kerry
At 07:23 AM 12/29/03 -0800, you wrote:
>We do this all the time at Parallax -- one of our favorite demos is a
>model airplane with a GPS datalogger, then we export the data to Excel
>for graphing. We use off-the-shelf Garmin GPS units and live with the
>10 meter resolution they provide; you're not going to get any better
>than that (I think) unless you setup a differential GPS system.
>
>I've written about GPS twice in my Nuts & Volts column:
>
>http://www.parallax.com/dl/docs/cols/nv/vol3/col/83.pdf
>http://www.parallax.com/dl/docs/cols/nv/vol4/col/103.pdf
>
>I believe you will find a file called AeroGPS.BSP in the File section of
>Yahoo Groups, though I can't confirm it right now because it's not
>letting me in....
>
>-- Jon Williams
>-- Applications Engineer, Parallax
>-- Dallas Office
>
>
>
>
Original Message
>From: arridh_shashank [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=mqpFKQXJ0RUDBmhoiH_lkBoudd0rpVpOgy41Qqd2iihCxZL5ssCJ3qBEdQfebJy2sqCD5MqbGhcEr6lC7FSMQhURBWM]arridh_shashank@y...[/url
>Sent: Monday, December 29, 2003 9:00 AM
>To: basicstamps@yahoogroups.com
>Subject: [noparse][[/noparse]basicstamps] Need Info on GPS
>
>
>Hey everyone!
>
>I want to use GPS to track the flight of my RC plane. Has anyone
>done this already and also can anyone suggest any reputable
>companies that sell quality GPS modules? I want fairly descent
>resolution say less than 2 meters or so (preferably less than 1m
>since next I would like to build a robot that uses GPS to navigate
>around my yard). Also are there any good sources that document GPS
>data logging with a BS2 (BS2p24 specifically).
>
>Many thanks
>Arridh
>
>
>To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
>from the same email address that you subscribed. Text in the Subject
>and Body of the message will be ignored.
>
>
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>
>To visit your group on the web, go to:
>http://groups.yahoo.com/group/basicstamps/
>
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>
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>
>
>
>
>This message has been scanned by WebShield. Please report SPAM to
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>
>
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Body of the message will be ignored.
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>
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>
Very respectfully, your obedient servant.
Brig. Gen. Johnston Pettigrew
Admin@M...
WWW server hosting [url=Http://mntnweb.com]Http://mntnweb.com[/url]
Kerry Barlow
p.o. box 21
kirkwood ny
13795
607-775-1575
is good to about plus or minus 30 foot of error in the
X,Y coordinate system and double that for the
altitude. You can get more accurate using an L1/L2 GPS
reciever. A reciever to get you to accuracies of about
1 foot of error will cost about $3,000. To get down to
centimeter accuracy your talking about a $5,000-7,000
receiver. Also these receivers require differential
corrections which you'd get from a base station
(another $10,000 - includes radio) or using the
Omnistar correction data from their satellites. You
could try two regular garmin GPS receivers and hold
one on a fixed point and transmit the error
corrections via radio to the roving unit. This can
work reasonably well provided you don't stray to far
from the fixed unit. Regardless of what you do I
believe you'll find that differential corrections will
require some form of radio telemetry, even the WAAS
system.
Perhaps some sort of sonar system with an electronic
compass could give position for enclosed spaces.
Eric
--- Kerry Barlow <admin@m...> wrote:
> I would be interested in what people have done using
> differential GPS for
> navigation. I would like resolution down to 1 foot
> for a robot. Maybe throw
> out GPS entirely and use some other triangulation
> method?
> Any advise would be appreciated.
> -Kerry
>
> At 07:23 AM 12/29/03 -0800, you wrote:
> >We do this all the time at Parallax -- one of our
> favorite demos is a
> >model airplane with a GPS datalogger, then we
> export the data to Excel
> >for graphing. We use off-the-shelf Garmin GPS
> units and live with the
> >10 meter resolution they provide; you're not going
> to get any better
> >than that (I think) unless you setup a differential
> GPS system.
> >
> >I've written about GPS twice in my Nuts & Volts
> column:
> >
>
>http://www.parallax.com/dl/docs/cols/nv/vol3/col/83.pdf
>
>http://www.parallax.com/dl/docs/cols/nv/vol4/col/103.pdf
> >
> >I believe you will find a file called AeroGPS.BSP
> in the File section of
> >Yahoo Groups, though I can't confirm it right now
> because it's not
> >letting me in....
> >
> >-- Jon Williams
> >-- Applications Engineer, Parallax
> >-- Dallas Office
> >
> >
> >
> >
Original Message
> >From: arridh_shashank
> [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=usT4pAlHkaIP4fE7UkZwwo57jCcPjvpCh1q85MjKBV2aRCEQEYGnlzvOWea0ICUfNdjUa2-EwR03VHH-30VLEyCg7OHF]arridh_shashank@y...[/url
> >Sent: Monday, December 29, 2003 9:00 AM
> >To: basicstamps@yahoogroups.com
> >Subject: [noparse][[/noparse]basicstamps] Need Info on GPS
> >
> >
> >Hey everyone!
> >
> >I want to use GPS to track the flight of my RC
> plane. Has anyone
> >done this already and also can anyone suggest any
> reputable
> >companies that sell quality GPS modules? I want
> fairly descent
> >resolution say less than 2 meters or so (preferably
> less than 1m
> >since next I would like to build a robot that uses
> GPS to navigate
> >around my yard). Also are there any good sources
> that document GPS
> >data logging with a BS2 (BS2p24 specifically).
> >
> >Many thanks
> >Arridh
> >
> >
> >To UNSUBSCRIBE, just send mail to:
> > basicstamps-unsubscribe@yahoogroups.com
> >from the same email address that you subscribed.
> Text in the Subject
> >and Body of the message will be ignored.
> >
> >
> >Yahoo! Groups Links
> >
> >To visit your group on the web, go to:
> >http://groups.yahoo.com/group/basicstamps/
> >
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> >
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> >
> >
> >
> >
> >This message has been scanned by WebShield. Please
> report SPAM to
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> >
> >
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> >
> >Yahoo! Groups Links
> >
> >To visit your group on the web, go to:
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> >
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> >
> >
> Very respectfully, your obedient servant.
> Brig. Gen. Johnston Pettigrew
>
> Admin@M...
> WWW server hosting [url=Http://mntnweb.com]Http://mntnweb.com[/url]
> Kerry Barlow
> p.o. box 21
> kirkwood ny
> 13795
> 607-775-1575
>
>
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
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> Text in the Subject and Body of the message will be
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>
>
|I want to use GPS to track the flight of my RC plane.... I want fairly
descent
|resolution say less than 2 meters or so (preferably less than 1m
I don't think this sort of resolution is possible with the standard GPS
receivers currently available for the normal consumer i.e.Garmin etc. Where
WAAS is available, it is posible to achieve perhaps 2 to 5 meters otherwise
you will have to be content with 5 to 10 meters. I am not positive that WAAS
is available to you in Oz. You might want to direct a query about resolution
to the folks that hang out at sci.geo.satellite-nav or alt.satellite.gps
newsgroups.
BTW: there are WAAS receiver modules available. Check the garmin website or
google WAAS.
HTH
Vic
________________________________________________________
Victor Fraenckel - The Windman
vfraenc1 ATSIGN nycap DOT rr DOTcom
KC2GUI
Home of the WindReader Electronic Theodolite
Read the WIND
"Victory at all costs, victory in spite of all terror, victory however long
and hard the road may be; for without victory there is no survival."
- Winston [noparse][[/noparse]Leonard Spencer] Churchill (1874 - 1965)
Dost thou not know, my son, with how little wisdom the world is governed?
-Count Oxenstierna (ca 1620) to the young King Gustavus Adolphus
am sure this position problem has been done many times before, but I have
not found any articles on how it is done on the web.
-Kerry
At 08:53 AM 12/29/03 -0800, you wrote:
>GPS accuracy from a standard Garmin type of GPS unit
>is good to about plus or minus 30 foot of error in the
>X,Y coordinate system and double that for the
>altitude. You can get more accurate using an L1/L2 GPS
>reciever. A reciever to get you to accuracies of about
>1 foot of error will cost about $3,000. To get down to
>centimeter accuracy your talking about a $5,000-7,000
>receiver. Also these receivers require differential
>corrections which you'd get from a base station
>(another $10,000 - includes radio) or using the
>Omnistar correction data from their satellites. You
>could try two regular garmin GPS receivers and hold
>one on a fixed point and transmit the error
>corrections via radio to the roving unit. This can
>work reasonably well provided you don't stray to far
>from the fixed unit. Regardless of what you do I
>believe you'll find that differential corrections will
>require some form of radio telemetry, even the WAAS
>system.
>
>Perhaps some sort of sonar system with an electronic
>compass could give position for enclosed spaces.
>
>Eric
>
>
>
>--- Kerry Barlow <admin@m...> wrote:
>> I would be interested in what people have done using
>> differential GPS for
>> navigation. I would like resolution down to 1 foot
>> for a robot. Maybe throw
>> out GPS entirely and use some other triangulation
>> method?
>> Any advise would be appreciated.
>> -Kerry
>>
>> At 07:23 AM 12/29/03 -0800, you wrote:
>> >We do this all the time at Parallax -- one of our
>> favorite demos is a
>> >model airplane with a GPS datalogger, then we
>> export the data to Excel
>> >for graphing. We use off-the-shelf Garmin GPS
>> units and live with the
>> >10 meter resolution they provide; you're not going
>> to get any better
>> >than that (I think) unless you setup a differential
>> GPS system.
>> >
>> >I've written about GPS twice in my Nuts & Volts
>> column:
>> >
>>
>>http://www.parallax.com/dl/docs/cols/nv/vol3/col/83.pdf
>>
>>http://www.parallax.com/dl/docs/cols/nv/vol4/col/103.pdf
>> >
>> >I believe you will find a file called AeroGPS.BSP
>> in the File section of
>> >Yahoo Groups, though I can't confirm it right now
>> because it's not
>> >letting me in....
>> >
>> >-- Jon Williams
>> >-- Applications Engineer, Parallax
>> >-- Dallas Office
>> >
>> >
>> >
>> >
Original Message
>> >From: arridh_shashank
>> [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=oQyIIf0eurIRUr2Pb99KA-IOj7zB_FhV67aICdYeTGJX0DO7caOnciszc3P_mYa2pz5eN5sp_GAlWqGYg-2eNUEo4L0MELg]arridh_shashank@y...[/url
>> >Sent: Monday, December 29, 2003 9:00 AM
>> >To: basicstamps@yahoogroups.com
>> >Subject: [noparse][[/noparse]basicstamps] Need Info on GPS
>> >
>> >
>> >Hey everyone!
>> >
>> >I want to use GPS to track the flight of my RC
>> plane. Has anyone
>> >done this already and also can anyone suggest any
>> reputable
>> >companies that sell quality GPS modules? I want
>> fairly descent
>> >resolution say less than 2 meters or so (preferably
>> less than 1m
>> >since next I would like to build a robot that uses
>> GPS to navigate
>> >around my yard). Also are there any good sources
>> that document GPS
>> >data logging with a BS2 (BS2p24 specifically).
>> >
>> >Many thanks
>> >Arridh
>> >
>> >
>> >To UNSUBSCRIBE, just send mail to:
>> > basicstamps-unsubscribe@yahoogroups.com
>> >from the same email address that you subscribed.
>> Text in the Subject
>> >and Body of the message will be ignored.
>> >
>> >
>> >Yahoo! Groups Links
>> >
>> >To visit your group on the web, go to:
>> >http://groups.yahoo.com/group/basicstamps/
>> >
>> >To unsubscribe from this group, send an email to:
>> >basicstamps-unsubscribe@yahoogroups.com
>> >
>> >Your use of Yahoo! Groups is subject to:
>> >http://docs.yahoo.com/info/terms/
>> >
>> >
>> >
>> >
>> >This message has been scanned by WebShield. Please
>> report SPAM to
>> >abuse@p....
>> >
>> >
>> >To UNSUBSCRIBE, just send mail to:
>> > basicstamps-unsubscribe@yahoogroups.com
>> >from the same email address that you subscribed.
>> Text in the Subject and
>> Body of the message will be ignored.
>> >
>> >
>> >Yahoo! Groups Links
>> >
>> >To visit your group on the web, go to:
>> > http://groups.yahoo.com/group/basicstamps/
>> >
>> >To unsubscribe from this group, send an email to:
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>> >
>> >Your use of Yahoo! Groups is subject to:
>> > http://docs.yahoo.com/info/terms/
>> >
>> >
>> >
>> Very respectfully, your obedient servant.
>> Brig. Gen. Johnston Pettigrew
>>
>> Admin@M...
>> WWW server hosting [url=Http://mntnweb.com]Http://mntnweb.com[/url]
>> Kerry Barlow
>> p.o. box 21
>> kirkwood ny
>> 13795
>> 607-775-1575
>>
>>
>>
>>
>> To UNSUBSCRIBE, just send mail to:
>> basicstamps-unsubscribe@yahoogroups.com
>> from the same email address that you subscribed.
>> Text in the Subject and Body of the message will be
>> ignored.
>>
>>
>> Yahoo! Groups Links
>>
>> To visit your group on the web, go to:
>> http://groups.yahoo.com/group/basicstamps/
>>
>> To unsubscribe from this group, send an email to:
>> basicstamps-unsubscribe@yahoogroups.com
>>
>> Your use of Yahoo! Groups is subject to:
>> http://docs.yahoo.com/info/terms/
>>
>>
>
>
>To UNSUBSCRIBE, just send mail to:
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Body of the message will be ignored.
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>
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>
Very respectfully, your obedient servant.
Brig. Gen. Johnston Pettigrew
Admin@M...
WWW server hosting [url=Http://mntnweb.com]Http://mntnweb.com[/url]
Kerry Barlow
p.o. box 21
kirkwood ny
13795
607-775-1575
I don't think you are going to get down to 1 foot without what's called
Real Time Kinematic survey grade equipment that's expensive.
What called poor man's DGPS, just correcting the Lat and Lon based on a
reference receiver really does not work.
DGPS will improve the solution but requires a real time link from the
base station or a DGPS receiver to the rover.
But there's a way to do DGPS with only a single receiver that has
special capability, i.e. the ability to both generate and utilize DGPS
corrections, like the Motorola GPS modules. For more on this check out
U.S. Patent 6397147
<http://164.195.100.11/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%\
2Fnetahtml%2Fsrchnum.htm&r=1&f=G&l=50&s1=6397147.WKU.&OS=PN/6397147&RS=PN/639714\
7>
Have Fun,
Brooke Clarke, N6GCE
http://www.PRC68.com
>Date: Mon, 29 Dec 2003 10:40:20 -0500
> From: Kerry Barlow <admin@m...>
>Subject: RE: Need Info on GPS
>
>I would be interested in what people have done using differential GPS for
>navigation. I would like resolution down to 1 foot for a robot. Maybe throw
>out GPS entirely and use some other triangulation method?
>Any advise would be appreciated.
>-Kerry
>
>
>
>
>
>
>
[noparse][[/noparse]Non-text portions of this message have been removed]