Re: GPS Antenna Coax length
Bob Gross <75013.1420@CompuServe.COM>
27 Jan 1997 01:51:13 GMT
You can run cables over considerable distances between GPS
antennas and the receiver IF you use the correct cable type. I
have run them 1000 feet before, but that takes pricey cable.
Also, the super low-loss stuff tends to have a larger diameter.
If you really need to go a long distance, get some LMR-xxx cable
from Times Microwave. They have several sizes. Whatever you do
for GPS, make damn sure that you use 50 ohm cable. Further, I
can't stress enough the importance of correct and tight
connectors. I have installed dozens of them.
---Bob Gross---
75013.1420@compuserve.com
Re: 12XL Availability - KMart?
orle@postoffice.worldnet.att.net (Tom Orle)
Mon, 27 Jan 1997 05:33:03 GMT
Charlie,
>Some one posted that the 12XL is available at KMart. There's a store
>not far from me, so I'd like to give it a try, but I'm wondering where
>in the store it would be. I've never been in a Kmart (believe it or not
I saw the same post and went straight to my local K-Mart!!
Here in Atlanta the local K-Mart has GPS' in the sporting godds dept.
That's where they sell fishing poles, guns etc.
But, sad to say - they didn't have the 12XL. They didn't even know
anything about it.
-=Tom=-
Re: EE and Data Export
Roman Robles
Sun, 26 Jan 1997 21:44:57 -0600
Jack,
Someone sent out a plea for information/help. While it is
commendable to conserve bandwidth, he might need a bit more information
than your reply offered. If you meant to refer to the fact that the
cables aren't yet available, that would have made a worthwhile response.
If you meant imply that the Eagle Explorer was not capable of
serving his needs, then a factual elaboration would be of interest to
many of us....
roman
-----------
Jack Yeazel wrote:
>
> Peter LaPlaca wrote:
> >
> > Ok, got the EE, excellent GPS. Now I want to download data to my PC for
> > use in a GIS (Geographic Information System). Has anyone out there done
> > this? What do I need in terms of software, cables, etc. I'll keep this
> > unit in lieu of buying a Garmin 12XL, but I need to be able to dump
> > data, at least as ASCII, to my PC. Help!!!!!!!!!!!!!!!!!
>
> Sorry, but you got the wrong receiver to do what you ask... )-8
>
> Jack
Re: Eagle Explorer (alarms and waypoints)
"Ronald M. Wilson"
27 Jan 1997 06:21:54 GMT
Arthur Schwartz wrote in article
>
> Well the manual is wrong on a couple of things. The manual states that
> the backlight is adjustable from "0" to 240 seconds when the unit itself
> goes from 240 to 5 seconds with no "0".
Art,
You're right, but I think the argument about whether the delay actually
goes from 5 to 240 seconds or 0 to 240 is immaterial now. According to
Jeff Kaiser's post entitled "EE Backlight will stay on continuously" from
1/24/97, the EE's backlight will stay on indefinitely if you set the delay
to 240 seconds and the unit is on external power. He tried it with a
makeshift external power connection and the backlight stayed on. The
manual says that it will shut off after 240 seconds even on external power.
While this is an error in the manual, it is an error in your favor.
> Also the manual states that the unit has "Audible tones and sounds", the
> unit does not have any audible tones or sounds.
I went back and checked the ALARMS section in my EE manual on pgs. 38-39.
In my copy it doesn't say anything about audible alarms. It says "You can
set an arrival alarm to flash a warning message ...". I took that to mean
the display would have a message flashing on it for an alarm. Maybe yours
is an earlier version which contained more errors than mine? I hear the
Lowrance version (Global Nav 200) of the EE is supposed to have audible
alarms.
[SNIP]
--
Ron Wilson
Re: benchmarks
"J. Anthony Cavell, PLS"
Sun, 26 Jan 1997 23:20:53 -0600
------------4B5CF49290F4
Content-Transfer-Encoding: 7bit
Content-Type: text/plain; charset=us-ascii
Edmund Henderson wrote:
>
> Can anyone tell me if there is a source for navagational benchmarks in
the US? In
> case I am not stating this correctly, what I am looking for is a list
of locations
> within the US for which exact ( well maybe not exact! ) latitude and
longitude figures
> are known. Please email me a edmundhh@aol.com
> Thanks
Check out:
http:\ngs.noaa.gov
and follow the links to products and monuments etc.
Good luck,
Tony
--
J. Anthony Cavell, PLS _______ ______
Navigation Electronics, Inc. /_____ / / @ \ /____ /
http://www.net-connect.net/~gpsman /_____ /===(@ % @)===/____ /
200 Toledo Drive /______/ \ @ / /_____/
Lafayette, LA 70506 "G P S m a n"
------------4B5CF49290F4
Content-Transfer-Encoding: 7bit
Content-Type: text/html; charset=us-ascii
Edmund Henderson wrote:
>
> Can anyone tell me if there is a source for navagational benchmarks
in the US? In
> case I am not stating this correctly, what I am looking for is a list
of locations
> within the US for which exact ( well maybe not exact! ) latitude and
longitude figures
> are known. Please email me a edmundhh@aol.com
> Thanks
Check out:
http:\ngs.noaa.gov
and follow the links to products and monuments etc.
Good luck,
Tony
--
J. Anthony Cavell, PLS
_______
______
Navigation Electronics, Inc.
/_____ / / @ \ /____ /
http://www.net-connect.net/~gpsman /_____ /===(@ % @)===/____ /
200 Toledo Drive
/______/ \ @ / /_____/
Lafayette, LA 70506
"G P S m a n"
------------4B5CF49290F4--
Re: Garmin to MacGPS pro?
kuenzli@polarnet.com (Bud Kuenzli)
Sun, 26 Jan 1997 09:49:29 -0900
In article <32EB6277.1B08@vax1.mankato.msus.edu>, Greg Van Eeckhout
wrote:
> Porkchop wrote:
>
SNIP
It also has the ability to rectify or set-up a map
> as a base map or background. This feature looks like the best thing
> about the program. In theory I should be able to take a scanned or
> otherwise aquired electronic image of a map and by knowing a few known
> positions on the map set it to a proper scale and location and then plot
> or find positions on this map.
>
> I have not had a chance to test this feature, but soon will see if I can
> get it to work.
See my other posting....I do the above all the time now. One caveat,
make sure that the map is lined up straight - perfectly straight. I use
Photoshop to rotate my scanned images, often in increments of .01 degrees
if needed, and regularly merge two scanned sections of maps when needed.
Scan at 24 bits if desrired and save the original if disk space/backup
allows, and then use something like Graphic Converter to save to thousands
of colors at 144 dpi and the file size becomes usable. Set MacGPS Pro to as
much RAM as is practical ( I set mine to 40 megs) and it will greatly speed
up everthing but scrolling. Caibrating with 4 or 5 points seems better than
three, and blow the map up to a high resolution before setting a known
lat/long or utm point for better accuracy. Piece of cake. ;)
> On a related subject I have had good luck with using my GPS data in MS
> excel, I take and create a text file with the output and then import or
> open this in excel and then you need to "parse" the data, just select
> the first column in excel and choose parse and the data seems to be a
> "space delimited text and it will break the data into columns
> accordingly. Note that if you have excel 5 open the file rather than
> importing it excel will automatically open this parse window.
>
> Greg
>
> Greg Van Eeckhout
> Limnologist (I Study Lakes and Rivers)
> MSU Water Resource Center
> http://www.mankato.msus.edu/dept/water/WRCweb/wrc_2.html
> For Quality Duck Calls checkout
> http://vax1.mankato.msus.edu/~vaneeck/dh.html
> "Genius is nothing but a great aptitude for patience"
--
Bud Kuenzli
North Pole, Alaska
Home Page
http://www2.northstar.k12.ak.us/schools/lth/students_and_staff/staff/kuenzli
b/bud.html
Webmaster, Lathrop High School, Fairbanks, Alaska
http://www2.northstar.k12.ak.us/schools/lth/lathrop_homepage.html#home_pages
In Cyberspace after you get where you're going you still don't know where
you are.
Re: Tripmate use on airlines?
rhelton@netcom.com (Richard Helton)
Mon, 27 Jan 1997 06:34:29 GMT
Chris Altwegg (altwegg@halcyon.com) wrote:
: Can I fire up the laptop/GPS and get a fix on where we are? The Delorme
: site seems to indicate that there is not software velocity limit, but
: I'm not sure if that means there's no other limitation that would render
: this unusable.
: Thanks!
: Chris
Chris, I think this speed limit thing is a common misconception, The limit
only applys to the display of the speed you are traveling, it does not
affect any other information. If you see a city or place you want to
revisit, at least if you are directly over it, take a waypoint and you
will find it again, it does not matter that the plane is doing 500 miles
per hour when you take that waypoint.
--
rhelton@netcom.com
Re: GPS in Holland?
"James G. Wood" <100601.476@compuserve.com>
27 Jan 1997 10:30:41 GMT
You are probably better off ordering one from the US - you'll just have to
add about 20% to the price to cover import duty and BTW. But don't get it
sent by a courier/parcel service, as you will have to pay customs clearance
fees, which will cost far more than the taxes. Just ask the seller to send
it via regular US Postal service (customs clearance for regular mail is
free). I received a 'free' database update from Garmin, and the customs
agent used by their courier service tried to charge me USD100 for their
'services' in clearing the package through customs, in addition to about
USD50 in BTW etc on the basis of their assessment of the value of the
floppy.
James Wood
Thierry or Vincent Powis wrote in article
...
> The best way to find a GPS dealer is to look in a port as GPS are used a
> lot by sailors and yahtman. I am sure that this must not be difficult to
> find in the Netherlands with all your canals.
> Good luck.
> If you are interested I can provide you with some adress in Belgium
> were I purchased 2 GPS 45 for friends to bring back in Thailand.
> Regards,
>
>
>
Re: benchmarks
dmulcar@ibm.net (Donald M. Mulcare)
27 Jan 1997 12:34:06 GMT
In <32EC579B.29B5@cstone.net>, Edmund Henderson writes:
>Can anyone tell me if there is a source for navagational benchmarks in the US? In
>case I am not stating this correctly, what I am looking for is a list of locations
>within the US for which exact ( well maybe not exact! ) latitude and longitude figures
>are known. Please email me a edmundhh@aol.com
>Thanks
I am unclear whether you are looking for precise locations for
navigational aids, e.g. buoys and lights, or survey monuments.
If it is the latter, the US NGS has a set of five CD-ROMs,
representing 5 regions, which cover the entire US. Each CD covers a
number of states and is broken down by state then county. The CD has
complete information for survey monuments, intersection stations (e.g.
radio towers and water tanks) which are part of the NGS data base.
The CD includes search and retrieval programs plus the datum
conversion programs NADCON (for NAD 27 to NAD 83 and NAD 83 (HARN))
and VERTCON (for NGVD 29 to NAVD 88). The CD can be ordered for $50
each or all for $200 from the NGS Info Center at 301.713.3242 (voice)
or 301.713.4172 (fax).
Alternatively, you can log on to the NGS web site at
http://www.ngs.noaa.gov. Follow links to products and services.
There is an on-line database search option. You can retrieve
information by either area (latitude/longitude block) or point name.
The on-line query is limited to perhaps 20 points.
|====================================================|
|== Donald M. Mulcare email:dmulcar@ibm.net ==|
|== NGS Advisor to Maryland 410.545.8963 (voice) ==|
|====visit the ngs home page at http://www.ngs.noaa.gov =====|
|====================================================|
ASHTECH software and US NGS CORS data
dmulcar@ibm.net (Donald M. Mulcare)
27 Jan 1997 12:41:33 GMT
Extracted from 27 Jan 97 CORS newsletter
======================================================================
January 24, 1997
PROBLEMS IN PROCESSING CORS DATA WITH ASHTECH SOFTWARE
Some users of CORS data have encountered problems when using
Ashtech processing software. We have been in contact with Ashtech
regarding these problems and have received the following information
from Ashtech.
Ashtech processing programs GPPS, PRISM, and WINPRISM are able
to process individual CORS RINEX files and CORS 24 hour RINEX files.
Problems arise when trying to use files that have been obtained by
joining two or more CORS hourly files using the programs provided by
NGS. To process this joined data the Ashtech software GPPS, WINPRISM,
RELIANCE, and the API converters require a "1" in the event field of
the GPS time tag of the first epoch of each hourly data set that is joined
to the initial hour. This "1" is not present in the joined CORS RINEX
data. Even with the "1" program PRISM v2.1 would still have a problem.
There are two ways of addressing this problem with joined files.
Ashtech has created a BETA version of a program, RINTOASH v5.3.01, which
will handle the joined data so that it can be input into all Ashtech
processing programs. This program needs thorough testing before being
distributed as a final released product. However, it can be made
available to users who are affected by problems in using CORS RINEX
data with Ashtech software. To obtain the program call Ashtech at
800-229-1400 and ask for Bob Lemoine. Alternately, Ashtech suggests
that users employ Ashtech software to join CORS hourly RINEX files.
------------------------------------------------------------------
The CORS newsletter in its entirety is posted to sci.geo.satellite-nav
Forwarded by:
|====================================================|
|== Donald M. Mulcare email:dmulcar@ibm.net ==|
|== NGS Advisor to Maryland 410.545.8963 (voice) ==|
|====visit the ngs home page at http://www.ngs.noaa.gov =====|
|====================================================|
Re: GPS Technical Reference
dmulcar@ibm.net (Donald M. Mulcare)
27 Jan 1997 12:46:58 GMT
In <32e97108.1630976@news.sprynet.com>, mrubin@sprynet.com (Martimus) writes:
> Can anyone recommend a worthwhile text on GPS? I am looking for
>something that will explain, in laymans terms, the un-classified
>basics of what GPS is, what it does, and how it works. I'd prefer to
>avoid physics texts and anything resembling a military technical
>manual (they're difficult enough to read while at work, I don't want
>to have to see them at home too).
>
> I've already read the Lawrence Letham book, "GPS Made Easy" and the
>Garmin 12XL reference and am wanting to learn more. Any help would be
>greatly appreciated.
Martin,
Beyond the manufacturers pamphlets, you may want to look at Tom
Logsdon's, _UNDERSTANDING THE NAVSTAR GPS, GIS, and IVHS_. It is
published by Van Nostrand Reinhold and sells for about $50 (US).
|====================================================|
|== Donald M. Mulcare email:dmulcar@ibm.net ==|
|== NGS Advisor to Maryland 410.545.8963 (voice) ==|
|====visit the ngs home page at http://www.ngs.noaa.gov =====|
|====================================================|
US NGS CORS Newsletter (26 Jan 97)
dmulcar@ibm.net (Donald M. Mulcare)
27 Jan 1997 12:37:30 GMT
=======================================
CORS Electronic Newsletter
=======================================
Authors: Bill Strange, Neil Weston
National Geodetic Survey, NOS, NOAA
Silver Spring, MD 20910
E-mail: bstrange@ngs.noaa.gov
nweston@ngs.noaa.gov
Info: jimd@ngs.noaa.gov
don@ngs.noaa.gov
Phone: (301) 713-3222 ext. 135
Lab: (301) 713-3169 ext. 146
Fax: (301) 713-4175
Subject: Current CORS Data Holdings.
Date: Sun Jan 26 22:45:02 EST 1997
Week: 03
GPS Week: 0889
Range: Day 019 to Day 025
To Access: ftp cors.ngs.noaa.gov
login: anonymous
password: your complete e-mail address
Message:
The Continuously Operating Reference Station (CORS) GPS network
managed by the National Geodetic Survey (NGS), NOAA, is operating in
an experimental mode and will continue to do so until the network is
declared fully operational in 1997. Full CORS integrity monitoring
has not been implemented by NGS at this time. NGS will do its best to
ensure the reliability of this service in the interim but, because of
this status, users of the CORS data should be aware that NGS cannot
ensure:
1. That all current sites will be operational at all times or will be
kept as part of the final network configuration;
2. That all GPS data, positional information, utility software, or
ancillary information which has been posted is 100 percent correct
and without error; and
3. That any additional proposed sites that are added in the future
will remain operational or will be kept as part of the network.
======================================================================
January 24, 1997
PROBLEMS IN PROCESSING CORS DATA WITH ASHTECH SOFTWARE
Some users of CORS data have encountered problems when using
Ashtech processing software. We have been in contact with Ashtech
regarding these problems and have received the following information
from Ashtech.
Ashtech processing programs GPPS, PRISM, and WINPRISM are able
to process individual CORS RINEX files and CORS 24 hour RINEX files.
Problems arise when trying to use files that have been obtained by
joining two or more CORS hourly files using the programs provided by
NGS. To process this joined data the Ashtech software GPPS, WINPRISM,
RELIANCE, and the API converters require a "1" in the event field of
the GPS time tag of the first epoch of each hourly data set that is joined
to the initial hour. This "1" is not present in the joined CORS RINEX
data. Even with the "1" program PRISM v2.1 would still have a problem.
There are two ways of addressing this problem with joined files.
Ashtech has created a BETA version of a program, RINTOASH v5.3.01, which
will handle the joined data so that it can be input into all Ashtech
processing programs. This program needs thorough testing before being
distributed as a final released product. However, it can be made
available to users who are affected by problems in using CORS RINEX
data with Ashtech software. To obtain the program call Ashtech at
800-229-1400 and ask for Bob Lemoine. Alternately, Ashtech suggests
that users employ Ashtech software to join CORS hourly RINEX files.
=========================================================================
January 12, 1997
WARNING Over the last two weeks the position for the antenna at
WARNING Gustavus (gus1) has gradually been changing. The operating
WARNING agency for the site is currently investigating the problem.
WARNING Please use the data from this site with caution.
=========================================================================
CORS Station Operators
----------------------
The following organizations provide data from their stations for
distribution
United States Coast Guard 44
United States Army Corps of Engineers 7
Texas Department of Transportation 10
NOAA (FSL/NGS/CIGNET) 14
Jet Propulsion Labratory (JPL/NASA) 7
Vermont Department of Transportation 1
Riverside County Flood District, CA 1
Harris Galveston Subsidence District, TX 1
NCAD Corporation, KY 1
Total 86
MON. DAY NUMBER
SITE_NAME NAME RECEIVER 019 020 021 022 023 024 025
================ ==== ============== === === === === === === ===
Amarillo TX aml5 Trimble SSE % 3 % 3 % 3 % 3 % 3 % 3 % 3
Annette_Isl AK ais1 Ashtech Z_XII3 0 0 *24 *75 *75 *75 *75
Aransas_Pass TX arp3 Ashtech Z_XII3 0 0 *24 *75 *75 *75 *75
Arlington TX arl5 Trimble SSE % 3 % 3 % 3 % 3 % 3 % 3 % 3
Austin TX aus5 Trimble SSE % 3 % 3 % 3 % 3 % 3 % 3 % 3
Beaumont TX bea5 Trimble SSE % 3 % 3 % 3 % 3 % 3 % 3 % 3
Blythe CA blyt Ashtech Z_XII3 0 0 D 2 0 0 D 2 D 2
Brunswick ME bru1 Ashtech Z_XII3 0 0 *24 *75 *75 *75 *75
CpCanaveral FL ccv1 Ashtech Z_XII3 0 0 *24 *75 *75 *75 *75
CpHenlopen DE chl1 Ashtech Z_XII3 0 0 *24 *75 *75 *75 *75
CpHenry VA chr1 Ashtech Z_XII3 0 0 *24 *75 *75 *75 *75
CpHinchinbrook AK chi1 Ashtech Z_XII3 0 0 *24 *75 *75 *75 *75
CpMendocino CA cme1 Ashtech Z_XII3 0 0 *24 *75 *75 *75 *75
Charleston SC cha1 Ashtech Z_XII3 0 0 *24 *75 *75 *75 *75
Chatham MA cht1 Ashtech Z_XII3 0 0 *24 *75 *75 *75 *75
Cheboygan MI chb1 Ashtech Z_XII3 0 0 *24 *75 *75 *75 *75
Cold_Bay AK bay1 Ashtech Z_XII3 0 0 *24 *75 *75 *75 *75
CorpusChristi TX corc Trimble SSE % 3 % 3 % 3 % 3 % 3 % 3 % 3
Detroit MI det1 Ashtech Z_XII3 0 0 *24 *75 *75 *75 *75
Egmont_Key FL eky1 Ashtech Z_XII3 0 0 *24 *75 *75 *75 *75
El_Paso TX paso Trimble SSE % 3 % 3 % 3 % 3 % 3 % 3 % 3
English_Turn LA eng1 Ashtech Z_XII3 0 0 *24 *75 *75 *75 *75
Erlanger KY erla Ashtech Z_XII3 0 0 #15 #63 #72 #71 #72
Fairbanks AK fair Rogue 8000 % 3 % 3 % 3 % 3 % 3 % 3 % 3
FT_Macon NC fmc2 Ashtech Z_XII3 0 0 *24 *75 *75 *75 *75
FT_Stevens OR fts1 Ashtech Z_XII3 0 0 *24 *75 *75 *75 *75
Gaithersburg MD gait Trimble SSE #72 #72 *75 *75 *75 *75 *75
Galveston TX gal1 Ashtech Z_XII3 0 0 *24 *75 *75 *75 *75
Goldstone CA gold Rogue SNR_8 % 3 % 3 % 3 % 3 % 3 % 3 % 3
Granada CO gdac Trimble SSI % 3 % 3 % 3 % 3 % 3 % 3 % 3
Gustavus AK gus1 Ashtech Z_XII3 0 0 *24 *75 *75 *75 *75
Haskell OK hklo Trimble SSE & 4 & 4 & 4 & 4 & 4 & 4 & 4
Haviland KS hvlk Trimble SSI & 4 & 4 & 4 & 4 & 4 & 4 & 4
Hillsboro KS hbrk Trimble SSE & 4 & 4 & 4 & 4 & 4 & 4 & 4
Houston TX hous Trimble SSE % 3 % 3 % 3 % 3 % 3 % 3 0
KansasCity KS kan1 Ashtech Z_XII3 0 0 *24 *75 *75 *75 *75
Kenai AK ken1 Ashtech Z_XII3 0 0 *24 *75 *75 *75 *75
Key_West FL kyw1 Ashtech Z_XII3 0 0 *24 *75 *75 *75 *75
Kodiak AK kod1 Ashtech Z_XII3 0 0 *24 *75 *75 *75 *75
Kokole_PT HI kok1 Ashtech Z_XII3 0 0 #10 *41 *75 *75 *75
Lake_Houston TX lkhu Trimble SSE 0 0 % 3 % 3 % 3 % 3 % 3
Lamont OK lmno Trimble SSE & 4 & 4 & 4 & 4 & 4 & 4 & 4
Lubbock TX lubb Trimble SSE % 3 % 3 % 3 % 3 % 2 % 3 0
McDonald TX mdo1 Rogue 8000 % 3 % 3 % 3 % 3 % 3 % 3 % 3
Miami FL mia1 Ashtech Z_XII3 0 0 *24 *75 *75 *75 *75
Millers_Ferry AL mlf1 Ashtech Z_XII3 0 0 *24 *75 *75 *75 *75
Milwaukee WI mil1 Ashtech Z_XII3 0 0 *24 *75 *75 *75 *75
Memphis TN mem2 Ashtech Z_XII3 0 0 *24 *75 *75 *75 *75
Mobile_PT AL mob1 Ashtech Z_XII3 0 0 *24 *75 *75 *75 *75
Montauk_PT NY mnp1 Ashtech Z_XII3 0 0 *24 *75 *75 *75 *75
Montpelier VT vcap Trimble SSE #72 #72 #72 #72 #72 #72 #71
Neebish_Isl MI neb3 Ashtech Z_XII3 0 0 *24 *75 *75 *75 *75
Neodesha KS ndsk Trimble SSI & 4 & 4 & 4 & 4 & 4 & 4 & 4
North_Liberty IA nlib Rogue 8000 % 3 % 3 0 0 0 0 0
Odessa TX ods5 Trimble SSE % 3 % 3 % 3 % 3 % 3 % 3 % 3
Pietown NM pie1 Rogue 8000 % 3 % 3 % 3 % 3 % 3 % 3 % 3
Pigeon_PT CA ppt1 Ashtech Z_XII3 0 0 *24 *75 *75 *75 *75
Platteville CO pltc Trimble SSE & 4 & 4 & 4 & 4 & 4 & 4 & 4
PT_Arguello CA par1 Ashtech Z_XII3 0 0 *24 *75 *75 *75 *75
PT_Blunt CA pbl1 Ashtech Z_XII3 0 0 *24 *75 * 9 *75 *75
PT_Loma CA plo3 Ashtech Z_XII3 0 0 *24 *75 *75 *75 *75
Portsmouth NH por2 Ashtech Z_XII3 0 0 *24 *75 *75 *75 *75
Purcell OK prco Trimble SSE & 4 & 4 & 4 & 4 & 4 & 4 & 4
Puerto_Rico PR pur1 Ashtech Z_XII3 0 0 *24 *75 *75 *75 *75
Quincy CA quin Rogue 8000 % 3 % 3 % 3 % 3 0 0 0
Richmond FL rcm6 Rogue 8000 % 3 % 3 % 3 % 3 % 3 % 3 % 3
Robinson_PT WA rpt1 Ashtech Z_XII3 0 0 *24 *75 *75 *75 *75
ST_Croix VI cro1 Rogue 8000 % 3 % 3 0 0 0 0 0
ST_Louis MO stl3 Ashtech Z_XII3 0 0 *24 *75 *75 *75 *75
ST_Paul WI stp1 Ashtech Z_XII3 0 0 *24 *75 *75 *75 *75
Saginaw_Bay MI sag1 Ashtech Z_XII3 0 0 *24 *75 *75 *75 *75
Sallisaw OK sal1 Ashtech Z_XII3 0 0 *15 *75 *75 *75 *75
San_Antonio TX anto Trimble SSE % 3 % 3 % 3 % 3 % 3 % 3 % 3
Sandy_Hook NJ shk1 Ashtech Z_XII3 0 0 *24 *75 *75 *75 *75
Stennis, MS ndbc Trimble SSI % 3 % 3 % 3 % 3 % 3 0 0
Sturgeon_Bay WI stb1 Ashtech Z_XII3 0 0 *24 *75 *75 *75 *75
Table_Mt CO tmgo Rogue 8000 & 4 & 4 & 4 & 4 & 4 & 4 & 4
Upolo_PT HI upo1 Ashtech Z_XII3 0 0 #10 *41 *75 *75 *75
Upper_Kewenaw MI kew1 Ashtech Z_XII3 0 0 *24 *75 *75 *75 *75
Vicksburg MS vic1 Ashtech Z_XII3 0 0 *24 *75 *75 *75 *75
Vici OK vcio Trimble SSE & 4 & 4 & 4 & 4 & 4 & 4 & 4
Westford MA wes2 Rogue 8000 % 3 % 3 % 3 % 3 % 3 % 3 % 3
Whidbey_Isl WA whd1 Ashtech Z_XII3 0 0 *24 *75 *75 *75 *75
Whitefish_PT MI whp1 Ashtech Z_XII3 0 0 *24 *75 *75 *75 *75
White_Sands NM wsmn Trimble SSE & 4 & 4 & 4 & 4 & 4 & 4 & 4
Wisconsin_PT WI wis1 Ashtech Z_XII3 0 0 *24 *75 *75 *75 *75
Youngstown NY you1 Ashtech Z_XII3 0 0 *23 *75 *75 *75 *75
The letters/symbols refer to the types of files available for that particular
day.
H Observation (hourly)
# Observation (hourly), Navigation
$ Observation (hourly), Navigation, Meteorological
N Navigation
S Navigation, Meteorological
M Meteorological
D Observation (daily)
% Observation (daily), Navigation
& Observation (daily), Navigation, Meteorological
+ Observation (daily), Meteorological
B Observation (daily, hourly)
* Observation (daily, hourly), Navigation
A Observation (daily, hourly), Navigation, Meteorological
Y Observation (daily, hourly), Meteorological
forwarded by:
|====================================================|
|== Donald M. Mulcare email:dmulcar@ibm.net ==|
|== NGS Advisor to Maryland 410.545.8963 (voice) ==|
|====visit the ngs home page at http://www.ngs.noaa.gov =====|
|====================================================|
Re: 45XL or AccuNav Sport? - Need advice
iggy@merit.net (GSW)
27 Jan 1997 13:28:08 GMT
Well, I don't really have much of a problem with that, as long
as it has the same basic information and such. I havnen't really
read the documents at the site you speak of either, I would like
to see what you have so far too. I have additional information
that backs up my opions about the performance levels of the GPS 45XL.
I am in the process of trying to explain all the things I have observed
and such. I hope to have a more complete, clear, and possibly even more
objective review of the two, as well as some info on the Explorer.
I will continue this discussion with you(Jack) in email if you
like. I did want to make a public comment as well...
In article <32EC4A91.5E63@peachnet.campus.mci.net>,
Jack Yeazel wrote:
>Hello iggy,
>I didn't include all your text about the AccuNav Sport, but I liked your
>review and was wondering if Joe Mehaffey and I could take excerpts from
>it for our "Low Cost....GPS Review" on Peter Bennett's Index??
>We're having a hard time getting reviews of Lowrance/Eagle receivers
>-since we ain't got all that much money to buy them!
>I would e-mail you the text for your review before uploading it...
Re: 12XL Availability - KMart?
iggy@merit.net (GSW)
27 Jan 1997 13:18:29 GMT
I saw the post, and then proceeded to see if I could find one...
I live in Southeastern Michigan, I went to four differnt K-marts
includeing one Super K-mart, and none had the Garmin 45XL. The
only GPS they had, was in the sporting goods area, near the fish
finders and other electronics(in a case), and that was a Magellan
2000(on sale for $149). I tried to get information, but it was
a Sunday and the people working didn't really know too much, and
the manager of that department wasn't going to be in untill monday.
I figured that if one K-mart had them, they should be pretty well
distributed around all K-marts, but this doesn't apear to be the case.
I also went to a West Marine, USA Boat, and two wilderness outfiters.
and NONE of the people I spoke with knew anything about the ne Garmin
product. I had some really bad experiances with sales people, lying to
me, and one even as much as told me I didn't know what I was talking about
that Garmin couldn't possibly be selling a 12 channel receiver for $249.
I'm sick of shoping for this thing... I am going to do some calling
today, but I'm not going anywhere untlill someone tells me they
have one and I can come picke it up, and they have a liberal return
policy of at least 30 days.(K-mart would have that by the way)
I told one guy at West Marine that the GPSs that hes was eying
were not infact as NEW as the stores signs indicated and that Garmin
has just released a product that should be much a much better performer
and he thanked me, and several other guys that were looking at GPSs
too, all left with in 5 minutes, leaving me and the sales guy... He
was actualy very polite, and we talked for an addtional 20 mintues
even though he knew nothing of the 12XL... I filled him in, and
let him know that he soon will know about it if it's half as good
as it should be.
In article <32ec3c1c.39930545@netnews.worldnet.att.net>,
Tom Orle wrote:
>Charlie,
>
>>Some one posted that the 12XL is available at KMart. There's a store
>>not far from me, so I'd like to give it a try, but I'm wondering where
>>in the store it would be. I've never been in a Kmart (believe it or not
>
>I saw the same post and went straight to my local K-Mart!!
>Here in Atlanta the local K-Mart has GPS' in the sporting godds dept.
>That's where they sell fishing poles, guns etc.
>But, sad to say - they didn't have the 12XL. They didn't even know
>anything about it.
Re: Broadcast Differential
FIDO
Mon, 27 Jan 1997 05:18:57 -0700
Sam Wormley writes:
Quoting from Peter H. Dana, Department of Geography,
University of Texas at Austin:
http://www.utexas.edu/depts/grg/gcraft/notes/
gps/gps.html#DifTechs
"The idea behind all differential positioning is to
correct bias errors at one location with measured
bias errors at a known position. A reference receiver,
or base station, computes corrections for each
satellite signal.
"Because individual pseudo-ranges must be corrected
prior to the formation of a navigation solution, DGPS
implementations require software in the reference
receiver that can track all SVs in view and form
individual pseudo-range corrections for each SV.
These corrections are passed to the remote, or rover,
receiver which must be capable of applying these
individual pseudo-range corrections to each SV used
in the navigation solution. Applying a simple position
correction from the reference receiver to the remote
receiver has limited effect at useful ranges because
both receivers would have to be using the same set of
SVs in their navigation solutions and have identical
GDOP terms (not possible at different locations) to be
identically affected by bias errors".
An excellent post, but there is a huge distinction between the
needs of different persons using DGPS. A key question is what
does the Coastguard offer, individual satellite correction or
a general position correction?
FIDO
Re: Eagle Explorer use?
iggy@merit.net (GSW)
27 Jan 1997 13:55:04 GMT
I know some of the comments about it being difficult to use were mine,
so I'd like to set something straight about my comments... I do find
the Eagles key pad difficult to use, since the buttons are so close
together, and they are not raised up very high, so it seems that you
have to be very precise when you use it. My comments were mostly about
the hardware features of it's interface. I did also find the firmware
to be a little diffiuclt(in comparison to the Eagle AccuNav I own
and a Garmin GPS 45 I recently purchased but will be returning). I
primaraly feel that the problems I observed were only really going
to be a significant problem if you were trying to operate the Explorer
as you drove a car, boat, bike, ect... or if you were wearing even
a light pair of gloves. My comments were also made before I had actually
held a Magellan 3000, but now I have done that, and I notice that the
buttons on the Magellan are very similar to those of the Explorer,
so I would see very little differance in the opererablity of those
two GPSs as far as keypad hardware is concerned. (I didn't spend any
significant time with the Magellan, so I can't even comment about it's
firmware).
The Explorer is a OK GPS, and at $200 the keypad and/or firmware
is not a show stoper, considering it's excelant performance. However
if your driving a vehilce and plan on operating the Explorer, you
better make sure you have good auto insurance and are using your
seatbelts/airbags, ect... as you may wind up in a accedent. On foot
or in your living room this should not be a problem.
In article <5cguf0$ktr$2@nadine.teleport.com>,
Gary wrote:
>After reading all the postings about the Eagle Explorer being so hard to enter
>waypoints and being so hard to use I was a little leary about it.
> Well I spent about 40 mins at the store with it yesterday and brought one
>home. I find it as easy to use as the Magellan that I had returned.
> Just my personal findings on the unit. It seems to be a common sense tool and
>not hard to use at all.
Re: 12XL Availability - KMart?
phr@netcom.com (Paul Rubin)
Mon, 27 Jan 1997 14:00:07 GMT
In article <5ci9v5$agf@lastactionhero.rs.itd.umich.edu>,
GSW wrote:
> I also went to a West Marine, USA Boat, and two wilderness outfiters.
>and NONE of the people I spoke with knew anything about the ne Garmin
>product. I had some really bad experiances with sales people, lying to
>me, and one even as much as told me I didn't know what I was talking about
>that Garmin couldn't possibly be selling a 12 channel receiver for $249.
I asked about the 12xl at West Marine in Palo Alto, CA a month or so
ago. They knew what it was, said they had several hundred on order,
and they were due in March but I shouldn't take the expected date
seriously since things always arrived later than they were supposed to.
Re: 12XL versus EE for marine use?
iggy@merit.net (GSW)
27 Jan 1997 14:33:53 GMT
I recently knoticed something about the GPS 45XL that may also
be true with the 12XL, and I think it could make a differance
to someonone who was going to be using a GPS for marine use, especialy
if you are going to also get a DGPS receiver...
The GPS 45XL does not seem to have adujustable distance on it's
arival alarm. I am not sure it actually has a "alarm" for cross track
error. It has a CDI or something that has three setings( .5 1.25, and
5), wich relates to cross track error, but I don't know if you ever
get a alarm when you exceed this. As for the arival alarm, the GPS 45XL
apparently only alerts you as to when your within 1 minute of your
waypoint/destination. I didn't look deeply enough into the Explorer
to tell you exactly how it behaves, but I have information on the
AccuNav Sport and what it allows for...
The AccuNav Sport has ajustable cross track limits and arival alarms.
THey can be adjusted from .01 units of measure(miles/knotucal miles/KM)
to 9.99 units of measure. I had always taken this for granted since
I've had the AccuNav for so long, but it is very nice to be able to
select the limits of these alerts. If you should get DGPs the fine
resoulution should become very handy as well.
As for the AccuNav's other displays. Speed goes to tenths of a unit
bearing/course over ground is degrees(no tenths), and the crosstrack
display varys dependig on the cross track limit you have selected as
described above.
I don't know how the explorer works, but I don't recomend it for
use in a vehilce, for other reasons, so I don't recomend it. I suspect
the 12XL will be much like the 45XL in terms of displays, and it's
ploter only goes from .2 to 320 miles, and is pretty low resoution so
I am not recomending this unit either...
I guess that leaves me still recomending the Eagle AccuNav Sport
for people who are primarly using their handheld GPS in a vehicle.
(even the Lowrance Global Nave 200 is going to have a low resolution
screen, small keypad that's not lit at all, ect..) Nope, the AccuNav Sport
still has some features that have not yet been duplicated in a GPS
that's under $400. It does not however display waypoints in alpha
order, unlesss you enter them in alpha order(they are refferanced by
number).
Good luck on your search for a GPS...
In article <32E6BB2C.50C1@worldnet.att.net>,
Doug Potter wrote:
>I have been following the debate about the two new products? I am ready
>to retire my loran and go GPS on my boat. I navigate almost exclusively
>using my loran and I would like to have the ability to monitor the
>following on one screen:
>
> Cross track error both graphically and in distance(.01 mile
> resolution)
>
> Bearing, course and speed
>
> Distance to go (to waypoint)
>
>I also need the ability to easily enter waypoint lat/lon, to name them
>with alpha characters and then scroll the list(alpha order) for waypoint
>selection.
>
>I have the impression that the Garmin interface is better suited for
>this application. I would appreciate your help.
Re: Parity calculation for RTCM-104
hgoldste@mpcs.com (Howard Goldstein)
27 Jan 1997 16:02:39 GMT
On Mon, 27 Jan 1997 14:11:25 GMT, Marc Y. Paulin wrote:
: I'm implementing the RTCM-104 is my C++ program, but there is
: a section of the ICD-GPS-200 manual that I don't understand. It's the
: partity calculation algorhythm table on page 114. It is unclear what
: exactly is D30* and D29*. If they are bits of the previous word, what
: happens to word1? Are they both of value 0?
They're the received bits from the previous word (n-1). Once you've
eaten a previous word you'll have the values for use in decoding the
next word (n). Received d29 and d30 from word (n) will be used to
decode word (n+1), and so on.
The initial states aren't knowable (nb., you could try all 4
combinations, if so inclined) but maybe in your app it's not a problem
should you have a stream - just sacrifice the first word for its
parity and then you'll be in sync.
Re: Georeferenced photographs??
beeker22@aol.com
27 Jan 1997 16:08:21 GMT
In article <32E94C9E.4C5D@internorth.com>, "Fritz P. Mueller"
writes:
>I am trying to find information on products that will allow collection
>of georeferenced photographs, either on film or digital, in remote field
>conditions. Any info will be greatly appreciated.
>
>Fritz Mueller
>Wildlife Systems Research
>P.O. Box 31106, 211 Main Street
>Whitehorse, YT
>Y1A 5P7 Canada
>
>fmueller@internorth.com
I've been tracking this issue off and on for the past 18 months or more.
As near as I can tell the only product available that utilizes a GPS
receiver to encode photographs (digital) with lat/lon/time data is the
Kodak Digital Science 420 GPS camera.
While the Kodak literature says that they offer a "family" of GPS cameras,
my discussions with their technical support people indicate that the only
camera that they will outfil with the GPS interface is the 420. The
camera and interface will run you something north of $13,000 (it is a
modified-Nikon unit, high-end). You have to provide the GPS receiver;
though Kodak says they can configure the unit to be compatible with the
receiver of your choice (among a short list of vendors/models).
I would be interested to hear more about this from others. Let's see if
we can keep this thread going.
Jonathan Cobb
