[gps-talkusers] Re: Digest version?
- From: Kim Casey <kim@xxxxxxxxxxxxxxxx>
- To: gps-talkusers@xxxxxxxxxxxxx
- Date: Fri, 21 May 2004 11:55:11 -0400
Larry and others,
To get a digest once a day you will have to create an account at
freelists.org. That doesn't mean that you will get lots of spam or
advertisements emailed to you, it just means that you will be able to
personalize your settings.
Here is how you sign up for an account:
1. Go to //www.freelists.org/login.html
Input your email address as if you were going to login, make sure it is the
same email that you are subscribed to the list. Leave the password input
box empty and press enter on the Login button.
2. You will be transferred to another very similar page where they will
ask you to do the same thing, but this time it will mention an
Authorization Code. So input your email address again (actually it might
already be in the box), leave the password blank and hit enter on the Login
button.
3. You will then be transfered to the Authorization Code page and your
Authorization code will be emailed to you within a couple of minutes. It
is *VERY* important to keep that page up and stay logged in to the internet
until you have received your Auth. code. If you disconnect before, you
will receive an "authorization code expired" message.
4. Copy and paste your Auth. code into the edit box and submit it.
5. You will then go to the main page, which can be confusing. You want to
tab until you reach the edit box to change your password, should be about 8
tabs. Enter in a password that you like, confirm the password in the next
edit box and enter on the button that says 'change password'.
6. You will get a confirmation that you have changed your password, click
the back button to get back to the previous page.
7. Now you want to tab to the list selection box, about 5 from the top,
and choose our list gps-talkusers. It is a long list, you once you are in
the selection box, you can hit G to go to all the entries that start with
G, then arrow down to ours. Then hit enter on the button 'Select List'
8. You will then be taken to the List Description page.
9. Tab to the button that says 'Change Settings'
10. Here you want to find the check box that will select Digest, check it,
then tab to the update account button and that should do it. There is a
Digest2, which will give you a digest and the normal messages (not what you
want- I assume), so be careful not to select that one.
Hope that helps, if not, please let me know. I am not positive about how
accessible this website is as I did all of this surfing with sight. I do
know that the tabbing navigation works well, just not sure how it reads.
Kim
At 09:26 AM 5/21/2004, you wrote:
>Is there a way to get a digest or once a day email summarizing the
>discussions of the list? I'm looking to reduce the number of messages that
>come in from the list and other places. Thanks.
>
>
>
>-----Original Message-----
>From: gps-talkusers-bounce@xxxxxxxxxxxxx
>[mailto:gps-talkusers-bounce@xxxxxxxxxxxxx]On Behalf Of Charles La
>Pierre
>Sent: Friday, May 21, 2004 8:46 AM
>To: gps-talkusers@xxxxxxxxxxxxx
>Subject: [gps-talkusers] Re: GPS mathematics
>
>
>This error you saw has been fixed in the next release of the GPS software
>due out later this summer.
>
>Charles.
>
>At 09:41 AM 5/20/2004, you wrote:
> >Greetings,
> >
> > Interesting you should ask this question. I did some distance
> >traveling with the BN GPS last week and found some interesting things,
> >some of which may very well be related to the mathematics of GPS.
> >
> > First I should say that I don't have an answer to your question..
> >What I do know is that you can't find the distance in an X y coordinate
> >system for a latitude and longitude. This is because the earth is not
> >flat. Hence, if you are at the equator you'll find that longitude lines
> >are a particular distance apart (I don't know the specific distance, but
> >if you know the circumference of the earth and you divide accordingly,
> >you'll figure it out. Anyway, as you travel north from the equator the
> >longitude lines will get closer and closer together. Eventually, they
> >all meet at the north pole.
> >
> > So, in order to compute the distance between two points you need
> >to account for the curve of the earth. For short distances,
> >particularly in computations near the equator, any error introduced by
> >not doing this may be fairly minor. For longer distances, particularly
> >as your distance from the equator increases, these errors will be
> >dramatic.
> >
> > So, as to the interesting thing I saw last week.
> >
> > I was in a car. We traveled from Arlington Massachusetts to
> >Stamford Connecticut. On the trip down, the BN GPS measured the
> >distance at about 200 miles. I felt this was not accurate. I'd always
> >believed the distance to be more like 180 miles. On the return trip,
> >taking the same roads, the car clocked the distance at 177 miles. My BN
> >GPS crashed about three times on that trip so I couldn't clock the trip
> >again.
> >
> > At one point though, we were driving east on I-90 (the Mass
> >pike) when the driver saw a sign saying 26 miles to I-95. From that
> >sign, to the I-95 ramp, the BN GPS clocked nearly 36 miles. This is a
> >pretty substantial error. Clearly such a substantial error cannot have
> >existed throughout the entire 177 mile trip otherwise BN GPS would have
> >reported a distance that was 68 miles in error. So I'm wondering if BN
> >GPS is more inaccurate when traveling east/west then north/south because
> >the earth's curviture is not accurately being accounted for.
> >
> > Since the Mass Pike is a bit north of Longitude 42N it is nearly
> >half way to the pole. Is it possible that BN GPS isn't accurately
> >dealing with this fact?
> >
> >John
> >
> >-----Original Message-----
> >From: gps-talkusers-bounce@xxxxxxxxxxxxx
> >[mailto:gps-talkusers-bounce@xxxxxxxxxxxxx] On Behalf Of Matthias
> >Weingart
> >Sent: Thursday, May 20, 2004 10:47 AM
> >To: gps-talkusers@xxxxxxxxxxxxx
> >Subject: [gps-talkusers] GPS mathematics
> >
> >
> >Hi,
> >
> >maybe I am asking in the wrong group (this is a group for GPS users, and
> >not developers?), but I would like to know something of the GPS basics.
> >In fact I would like to calculate the distance and angle between 2 GPS
> >coordinates (or position in a x-y diagram, where one coordinate is
> >(0,0)). (starting from the NMEA-string, result should be meters).
> >
> >I would be very happy, if somebody here could point me to some good
> >ressources.
> >
> > Matthias
>
>Charles M. La Pierre CTO
>Sendero Group, LLC
>
>Lat. 37 15' 25" N Lon: 121 53' 04" W
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