Featured Surveying Discussions - Land Surveyors United - Global Surveying Community2024-03-29T05:36:06Zhttps://landsurveyorsunited.com/hubs/gpsprofessionals/forum/feed/featuredGPS Verticle hit and Miss ???https://landsurveyorsunited.com/hubs/gpsprofessionals/forum/gps-verticle-hit-and-miss2009-05-10T11:30:51.000Z2009-05-10T11:30:51.000ZJimhttps://landsurveyorsunited.com/surveyors/Jim<div>Comment by Jim 1 second ago Delete Comment Verticle, GPS is seems undesirable at times. 1/4" - 2' variables. Not good when your putting in Pavement grades, our control. Any one have insight here. I have had time of hitting right on but the hit and miss has got to go , Right?</div>Data Link for your GNSS Systemhttps://landsurveyorsunited.com/hubs/gpsprofessionals/forum/data-link-for-your-gnss-system2009-11-02T20:47:36.000Z2009-11-02T20:47:36.000ZJimhttps://landsurveyorsunited.com/surveyors/Jim<div>Is the <i>CELL</i> Phone really the Achilles Heel of your GNSS Geo Station?Unfortunately, there is no magic solution. Your coverage is limited by the service provider that you have chosen to use. In speaking with some infrastructure people at Trimble, their recommendation to end users is to go with the provider in your area that provides the best 3G coverage.Just a quick note, it is important for you the user to realize that just because you are in a location where you can use your cell phone to place and receive calls, that does not guarantee that you have data coverage in that same location. Some cell towers are for voice only coverage and while others provide coverage for both voice and data.Sorry at this point I could not provide you more insight into this issue that you are seeing with regards to the limits of your cellular coverage, but please understand that these issues are beyond the control of your Geostation manufacturer.I can only say that I have tried many services and I have found that Verizons VX8300 and it upgrade VX 8360 are without question very good I have been in many regions across our state and the dissconnect has been little to none existen.</div>geoid09 in gfs format file so I can SD card from PChttps://landsurveyorsunited.com/hubs/gpsprofessionals/forum/geoid09-in-gfs-format-file-so2010-02-26T04:25:28.000Z2010-02-26T04:25:28.000ZGary Breischhttps://landsurveyorsunited.com/surveyors/GaryBreisch<div>I have the ProMark3 RTK (PM3R) and no one so far can seem to show me a way to take the geoid09.geo file and convert it to a gsf file (geoid separation file) for my unit.  Randy Black was nice enough several years ago to create me a gsf of geoid03 for about a 150 mile radius of Tulsa OK but I am confused now when I try to figure out how.  Nothing that Ashtech (formerly Magellan Pro) has explains how to do it and I am certain it can be done. <br />
<br />
I took the reduced area specific version in geo format and thought I could just change the name to gsf and it would work and be the same.  I even loaded it and told my units to use it.  I have not done RTK in a while so did not really get to test it.  But when I opened both files in notebook, the old file in gsf was readable in text format but the geo was in hieroglyphics (non-readable symbolic).<br />
<br />
 I suspect the reduce geo that I changed in extension name to gsf is not going to work.   Does anyone have a way to convert the file into a for sure usable format I can easily transfer using my SD like I am used to.  I hate to think of trying to cable transfer - always have a hard time getting those stupid com ports to work and never want to do a transfer that way again.<br />
<br />
<br />
</div>Repeater Set Up?https://landsurveyorsunited.com/hubs/gpsprofessionals/forum/repeater-set-up2011-01-13T22:18:05.000Z2011-01-13T22:18:05.000ZPaul Quaggehttps://landsurveyorsunited.com/surveyors/PaulQuagge<div>Hello, could someone please walk me through configuring and setting up a repeater? I have a Pacific Crest HPB450 radio. I have a lot of options for GPS equipment...we have a R7, 5700,5800,4800.... trimark3's....multiple antenna types. We can also connect to a network using cell phone/internet connection. We have cobs and cors stations available. Any help would be appreciated. Thanks,Paul</div>Virtual Reference Stationhttps://landsurveyorsunited.com/hubs/gpsprofessionals/forum/virtual-reference-station2011-02-25T23:23:22.000Z2011-02-25T23:23:22.000ZTy Olinghousehttps://landsurveyorsunited.com/surveyors/TyOlinghouse<div><p>Here are some informative papers on VRS, I found while surfing the net</p></div>Home-Made GPS Receiver How-tohttps://landsurveyorsunited.com/hubs/gpsprofessionals/forum/home-made-gps-receiver-how-to2011-10-22T01:41:39.000Z2011-10-22T01:41:39.000Z⚡Survenator⌁https://landsurveyorsunited.com/surveyors/Survenator<div><p><a href="http://www.holmea.demon.co.uk/GPS/Main.htm" target="_blank"><img src="{{#staticFileLink}}1200636879,original{{/staticFileLink}}" width="350" class="align-right" /></a>I was blown away when I saw (via <a target="_blank" href="http://blog.makezine.com/archive/2011/10/homemade-gps-receiver.html">Make</a>)that someone had created a home-made GPS receiver.  <a href="http://www.holmea.demon.co.uk/GPS/Main.htm" target="_blank">Andrew Holme</a> just may be a genius. He built an incredible four-channel GPS receiver using some repurposed <a href="http://en.wikipedia.org/wiki/Field-programmable_gate_array" target="_blank">FPGA board</a> from a previous frequency synthesizer project. Then, by connecting it to a PC running a console app, Andrew’s receiver is now capable of tracking at least four satellites simultaneously, which is good enough to capture lat, long, and altitude.  This homemade GPS receiver should not be confused with the ultra-cool <a target="_self" href="http://landsurveyorsunited.com/group/gpsprofessionals/forum/topics/poor-mans-gps-network-by-phil">Poor mans GPS</a>.  <a target="_blank" href="http://www.holmea.demon.co.uk/GPS/Main.htm">Read about the whole process here</a> and be amazed.</p>
<p> </p>
<blockquote>
<p> <br />
Solutions are computed in earth-centred, earth-fixed (ECEF) coordinates. User location is converted to latitude, longitude and altitude with a correction for eccentricity of the earth, which bulges at the equator. (<a target="_blank" href="http://blog.makezine.com/archive/2011/10/homemade-gps-receiver.html">Make</a>)</p>
</blockquote>
<p><a target="_blank" href="http://www.holmea.demon.co.uk/GPS/Main.htm"><img class="align-full" width="600" src="{{#staticFileLink}}1200636969,original{{/staticFileLink}}" /></a></p>
</div>LightSquared GPShttps://landsurveyorsunited.com/hubs/gpsprofessionals/forum/lightsquared-gps2011-06-11T21:11:16.000Z2011-06-11T21:11:16.000ZScott D. Warner, PLShttps://landsurveyorsunited.com/surveyors/ScottDWarnerRLS<div><p><strong>LightSquared GPS</strong> is a problem! We need more discussion on this topic because it affects every Land Surveyor on Earth. We could even have a group solely dedicated to this topic, but for now the GPS group will have to speak LOUD about the emerging threat to our GPS signals. Unless every member here on LSU is willing to go back to the days before GPS we have to UNITE and voice our concerns about the legitimate threat of being shut down as a small group of users of the GPS constellation of sattelites.</p><p>In case you have not been informed, LightSquared (a private company that recently received a <strong>WAIVER FROM THE FCC</strong> to develop its 4G wireless network close to the GPS spectrum) continues to move forward with its planned activities; which could disrupt GPS usage.</p><p>If any member has news or other information on the developments on this topic, please share it here or do not fear retribution for creating an LSU Group dedicated to this highly important issue. </p><p>I will allow only one week for somebody to spearhead a group on LSU before I take the initiative to do so myself. The reason that I offer this is because I am not an expert in the happenings involving LightSquared. I am hoping that we have a member that is more informed than I am on the subject and is willing to invest a few minutes to be the moderator of a group that may have the potential to have an influence on the outcome of the inherent threat that LightSquared poses.</p><p> </p><p>Please help your profession by contributing your thoughts and ideas.</p></div>Glossary Guide to GPS Termshttps://landsurveyorsunited.com/hubs/gpsprofessionals/forum/glossary-guide-to-gps-terms2012-03-29T01:38:19.000Z2012-03-29T01:38:19.000ZSurveyEarthinaDayhttps://landsurveyorsunited.com/surveyors/SurveyEarthinaDay<div><p>Below is a good start for a glossary style <strong>definitions list related to GPS Terms</strong>.  Feel free to add your terms as comments below the post. </p>
<p align="center"><strong>- A -</strong></p>
<p style="color: #000000; font-family: 'Times New Roman'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; background-color: #ffffff; font-size: medium;"><b>Almanac -</b><span class="Apple-converted-space"> </span>the Almanac is a file which contains positional information for all of the GPS satellites. The Almanac is used by the GPS receiver to determine which satellites to track, and can also be used for mission planning.</p>
<p style="color: #000000; font-family: 'Times New Roman'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; background-color: #ffffff; font-size: medium;"><b>Attribute -</b><span class="Apple-converted-space"> </span>a characteristic which describes a Feature. Attributes can be thought of as questions which are asked about the Feature.</p>
<p style="color: #000000; font-family: 'Times New Roman'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; background-color: #ffffff; font-size: medium;" align="center"><br />
<b>- C -</b><span class="Apple-converted-space"> </span></p>
<p style="color: #000000; font-family: 'Times New Roman'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; background-color: #ffffff; font-size: medium;"><b>C/A Code -</b><span class="Apple-converted-space"> </span>the standard (Course/Acquisition) GPS code used by most GIS level GPS receivers. Also known as the civilian code.</p>
<p style="color: #000000; font-family: 'Times New Roman'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; background-color: #ffffff; font-size: medium;"><b>Carrier -</b><span class="Apple-converted-space"> </span>the signal that carries the C/A Code from the satellite to the GPS receiver.</p>
<p style="color: #000000; font-family: 'Times New Roman'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; background-color: #ffffff; font-size: medium;"><b>Carrier-aided Tracking -</b><span class="Apple-converted-space"> </span>a signal processing technique that uses the GPS carrier signal to achieve an exact lock on the pseudo random code generated by the GPS satellite. Carrier-aided tracking is more accurate than standard C/A Code tracking.</p>
<p style="color: #000000; font-family: 'Times New Roman'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; background-color: #ffffff; font-size: medium;"><b>Channel -</b><span class="Apple-converted-space"> </span>a channel of a GPS receiver consists of the circuitry necessary to track the signal from a single GPS satellite.</p>
<p style="color: #000000; font-family: 'Times New Roman'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; background-color: #ffffff; font-size: medium;"><b>Cycle Slip -</b><span class="Apple-converted-space"> </span>a loss of continuity in the measured carrier beat phase which results from a temporary loss of lock on a GPS satellite.</p>
<p style="color: #000000; font-family: 'Times New Roman'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; background-color: #ffffff; font-size: medium;" align="center"><br />
<b>- D -</b><span class="Apple-converted-space"> </span></p>
<p style="color: #000000; font-family: 'Times New Roman'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; background-color: #ffffff; font-size: medium;"><b>Differential Correction -<span class="Apple-converted-space"> </span></b>the technique of comparing GPS data collected in the field to GPS data collected at a known point. By collecting GPS data at a known point, a correction factor can be determined and applied to the field GPS data.</p>
<p style="color: #000000; font-family: 'Times New Roman'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; background-color: #ffffff; font-size: medium;"><b>Dilution of Precision</b><span class="Apple-converted-space"> </span><b>(DOP) -</b><span class="Apple-converted-space"> </span>an indicator of satellite geometry for a unique constellation of satellites used to determine a position. Positions tagged with a higher DOP value generally constitute poorer measurement results than those tagged with lower DOP.</p>
<p style="color: #000000; font-family: 'Times New Roman'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; background-color: #ffffff; font-size: medium;"><b>Dynamic Positioning -</b><span class="Apple-converted-space"> </span>the process of collecting GPS data while the GPS antenna is in motion. Often associated with Line or Area Features.</p>
<p style="color: #000000; font-family: 'Times New Roman'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; background-color: #ffffff; font-size: medium;" align="center"><br />
<b>- E -</b><span class="Apple-converted-space"> </span></p>
<p style="color: #000000; font-family: 'Times New Roman'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; background-color: #ffffff; font-size: medium;"><b>Ephemeris -</b><span class="Apple-converted-space"> </span>the predicted changes in the orbit of a satellite that are transmitted to the GPS receiver from the individual satellites.</p>
<p style="color: #000000; font-family: 'Times New Roman'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; background-color: #ffffff; font-size: medium;"><b>Ephemeris Errors -</b><span class="Apple-converted-space"> </span>errors which originate in the ephemeris data transmitted by a GPS satellite. Ephemeris errors are removed by differential correction.</p>
<p style="color: #000000; font-family: 'Times New Roman'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; background-color: #ffffff; font-size: medium;" align="center"><br />
<b>- F -</b><span class="Apple-converted-space"> </span></p>
<p style="color: #000000; font-family: 'Times New Roman'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; background-color: #ffffff; font-size: medium;"><b>Feature -</b><span class="Apple-converted-space"> </span>the object which is being mapped for use in a GIS system. Features may be points, lines or areas.</p>
<p style="color: #000000; font-family: 'Times New Roman'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; background-color: #ffffff; font-size: medium;"><b>Featuring -</b><span class="Apple-converted-space"> </span>the process of collecting GPS and GIS information simultaneously.</p>
<p style="color: #000000; font-family: 'Times New Roman'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; background-color: #ffffff; font-size: medium;" align="center"><br />
<b>- G -</b><span class="Apple-converted-space"> </span></p>
<p style="color: #000000; font-family: 'Times New Roman'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; background-color: #ffffff; font-size: medium;"><b>Geographic Information System (GIS) -<span class="Apple-converted-space"> </span></b>a mapping system which combines positional data with descriptive information to form a layered map.</p>
<p style="color: #000000; font-family: 'Times New Roman'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; background-color: #ffffff; font-size: medium;"><b>Global Positioning System (GPS)</b><span class="Apple-converted-space"> </span>- a system for providing precise location which is based on data transmitted from a constellation of 24 satellites</p>
<p style="color: #000000; font-family: 'Times New Roman'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; background-color: #ffffff; font-size: medium;" align="center"><br />
<b>- L -</b><span class="Apple-converted-space"> </span></p>
<p style="color: #000000; font-family: 'Times New Roman'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; background-color: #ffffff; font-size: medium;"><b>L-band -</b><span class="Apple-converted-space"> </span>the group of radio frequencies which carry the GPS data from the satellites to the GPS receivers.</p>
<p style="color: #000000; font-family: 'Times New Roman'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; background-color: #ffffff; font-size: medium;" align="center"><br />
<b>- M -</b><span class="Apple-converted-space"> </span></p>
<p style="color: #000000; font-family: 'Times New Roman'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; background-color: #ffffff; font-size: medium;"><b>Multipath -<span class="Apple-converted-space"> </span></b>the interference to a signal that has reached the receiver antenna by multiple paths; usually caused by the signal being bounced or reflected. Signals from satellites low on the horizon will have high multipath error. Receivers that can be configured to "mask out" signals from such satellites can help minimize multi-path.</p>
<p style="color: #000000; font-family: 'Times New Roman'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; background-color: #ffffff; font-size: medium;" align="center"><br />
<b>- P -</b><span class="Apple-converted-space"> </span></p>
<p style="color: #000000; font-family: 'Times New Roman'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; background-color: #ffffff; font-size: medium;"><b>Pseudorange -</b><span class="Apple-converted-space"> </span>an uncorrected measurement of the distance between a GPS satellite and a GPS receiver determined by comparing a code transmitted by the satellite to a code generated by the receiver.</p>
<p style="color: #000000; font-family: 'Times New Roman'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; background-color: #ffffff; font-size: medium;" align="center"><br />
<b>- R -</b><span class="Apple-converted-space"> </span></p>
<p style="color: #000000; font-family: 'Times New Roman'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; background-color: #ffffff; font-size: medium;"><b>Residual -</b><span class="Apple-converted-space"> </span>a quality indicator for a GPS position that is determined during the differential correction process. Indicates uncorrectable error. High residuals are not desirable.</p>
<p style="color: #000000; font-family: 'Times New Roman'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; background-color: #ffffff; font-size: medium;" align="center"><br />
<b>- S -</b><span class="Apple-converted-space"> </span></p>
<p style="color: #000000; font-family: 'Times New Roman'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; background-color: #ffffff; font-size: medium;"><b>Satellite Constellation</b><span class="Apple-converted-space"> </span><b>-<span class="Apple-converted-space"> </span></b>the group of GPS satellites from which data is used to determine a position.</p>
<p style="color: #000000; font-family: 'Times New Roman'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; background-color: #ffffff; font-size: medium;"><b>Static Positioning -</b><span class="Apple-converted-space"> </span>the process of averaging GPS positions taken successively over a period of time with a stationary antenna to increase accuracy.</p>
<p style="color: #000000; font-family: 'Times New Roman'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; background-color: #ffffff; font-size: medium;" align="center"><br />
<b>- V -</b><span class="Apple-converted-space"> </span></p>
<p style="color: #000000; font-family: 'Times New Roman'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; background-color: #ffffff; font-size: medium;"><b>Value -</b><span class="Apple-converted-space"> </span>descriptive information about a Feature. Values can be thought of as the answers to the questions posed by Attributes.</p>
</div>OPUS Post Processinghttps://landsurveyorsunited.com/hubs/gpsprofessionals/forum/opus-post-processing2012-02-20T18:05:49.000Z2012-02-20T18:05:49.000Zmarcel milleurhttps://landsurveyorsunited.com/surveyors/marcelmilleur<div><div style="widows: 2; text-transform: none; background-color: #ffffff; text-indent: 0px; font: 19px 'bookman old style', 'new york', times, serif; white-space: normal; orphans: 2; letter-spacing: normal; color: #000000; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span>Re: <a rel="nofollow" style="outline-width: 0px; color: #234786; text-decoration: underline;" href="http://www.ngs.noaa.gov/OPUS/" target="_blank"><span id="lw_1329738131_0" class="yshortcuts">http://www.ngs.noaa.gov/OPUS/</span></a></span></div><div style="widows: 2; text-transform: none; background-color: #ffffff; text-indent: 0px; font: 19px 'bookman old style', 'new york', times, serif; white-space: normal; orphans: 2; letter-spacing: normal; color: #000000; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"> </div><div style="widows: 2; text-transform: none; background-color: #ffffff; text-indent: 0px; font: 19px 'bookman old style', 'new york', times, serif; white-space: normal; orphans: 2; letter-spacing: normal; color: #000000; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;">First time user.......</div><div style="widows: 2; text-transform: none; background-color: #ffffff; text-indent: 0px; font: 19px 'bookman old style', 'new york', times, serif; white-space: normal; orphans: 2; letter-spacing: normal; color: #000000; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"></div><div style="widows: 2; text-transform: none; background-color: #ffffff; text-indent: 0px; font: 19px 'bookman old style', 'new york', times, serif; white-space: normal; orphans: 2; letter-spacing: normal; color: #000000; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;">Sokkia Startus L1 ..... Seems like I filled out the form correctly.</div><div style="widows: 2; text-transform: none; background-color: #ffffff; text-indent: 0px; font: 19px 'bookman old style', 'new york', times, serif; white-space: normal; orphans: 2; letter-spacing: normal; color: #000000; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"></div><div style="widows: 2; text-transform: none; background-color: #ffffff; text-indent: 0px; font: 19px 'bookman old style', 'new york', times, serif; white-space: normal; orphans: 2; letter-spacing: normal; color: #000000; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;">I've converted the raw file (*.str) to Rinex format and uploaded it to OPUS</div><div style="widows: 2; text-transform: none; background-color: #ffffff; text-indent: 0px; font: 19px 'bookman old style', 'new york', times, serif; white-space: normal; orphans: 2; letter-spacing: normal; color: #000000; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"></div><div style="widows: 2; text-transform: none; background-color: #ffffff; text-indent: 0px; font: 19px 'bookman old style', 'new york', times, serif; white-space: normal; orphans: 2; letter-spacing: normal; color: #000000; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;">ERROR MSG:</div><div style="widows: 2; text-transform: none; background-color: #ffffff; text-indent: 0px; font: 19px 'bookman old style', 'new york', times, serif; white-space: normal; orphans: 2; letter-spacing: normal; color: #000000; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;" id="yui_3_2_0_1_13297351394222932"><span style="font-family: arial, helvetica, sans-serif; color: #454545; font-size: 13px;">FILE: 17691301.12O OP1329502833064</span><br style="font-family: arial, helvetica, sans-serif; color: #454545; font-size: 13px;"/><br style="font-family: arial, helvetica, sans-serif; color: #454545; font-size: 13px;"/><span style="font-family: arial, helvetica, sans-serif; color: #454545; font-size: 13px;">1010 The RINEX dataset submitted to OPUS only contained data for a single</span><br style="font-family: arial, helvetica, sans-serif; color: #454545; font-size: 13px;"/><span style="font-family: arial, helvetica, sans-serif; color: #454545; font-size: 13px;">1010 frequency. Dual frequency data is needed for processing.</span><br style="font-family: arial, helvetica, sans-serif; color: #454545; font-size: 13px;"/><span style="font-family: arial, helvetica, sans-serif; color: #454545; font-size: 13px;">1010 Aborting...</span><br style="font-family: arial, helvetica, sans-serif; color: #454545; font-size: 13px;"/><span style="font-family: arial, helvetica, sans-serif; color: #454545; font-size: 13px;">1010</span> </div><div style="widows: 2; text-transform: none; background-color: #ffffff; text-indent: 0px; font: 19px 'bookman old style', 'new york', times, serif; white-space: normal; orphans: 2; letter-spacing: normal; color: #000000; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"></div><div style="widows: 2; text-transform: none; background-color: #ffffff; text-indent: 0px; font: 19px 'bookman old style', 'new york', times, serif; white-space: normal; orphans: 2; letter-spacing: normal; color: #000000; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;"><span style="color: #ff0000;">Am I doing something wrong ?</span></div></div>Poor Mans GPS Network by Phil Stevensonhttps://landsurveyorsunited.com/hubs/gpsprofessionals/forum/poor-mans-gps-network-by-phil2011-03-27T21:05:14.000Z2011-03-27T21:05:14.000ZJaybirdhttps://landsurveyorsunited.com/surveyors/Jaybird<div><a href="http://landsurveyorsunited.com/profile/PhilStevenson" target="_self">Phil Stevenson</a>, Land Surveyors United member, Magellan-Ashtech equipment expert and professional self-proclaimed <em>"Dirt Surveyor"</em> wrote a paper once called "Poor Man's GPS Network," which I have for you below to download and read.<br />
<a target="_blank" href="http://www.scribd.com/doc/188435/Poor-Mans-GPS"><img class="align-right" width="360" src="{{#staticFileLink}}1200620961,original{{/staticFileLink}}" alt="Poor mans GPS network" /></a><br />
<br />
<embed wmode="opaque" src="http://embedit.in/WgNaEyD8x4.swf" height="400" width="466" type="application/x-shockwave-flash" allowfullscreen="false" allowscriptaccess="never"></embed> Click to Open and Read Poor Man's GPS or download below. If you're interested in this, you may also like reading <a target="_self" href="http://landsurveyorsunited.com/group/onemanshow/forum/topics/using-cellular-phone-to?xg_source=activity">How to Connect to RTK using a cellphone</a>.
</div>HTC Android GPS Appshttps://landsurveyorsunited.com/hubs/gpsprofessionals/forum/htc-android-gps-apps2011-09-22T16:15:28.000Z2011-09-22T16:15:28.000ZGary Breischhttps://landsurveyorsunited.com/surveyors/GaryBreisch<div><p> </p>
<p><strong><span class="font-size-5">I want a free or low priced GPS app or program that will show and store bread crumb "trails" to the SD card.  I will use it on an Android Desire Phone Device and/or transfer and show on PC and overlay onto Google Maps or Google Earth. </span></strong><br />
<br />
<strong><span class="font-size-5">Display of the trails will have both time and lat/lon placemarks with polylines between trial interval points that vary depending on speed.  Walking speed might be every 25 to 50 feet while highway trail points are shown at 500 to 1000 feet at 65 to 75 miles per hour.</span></strong><br />
<br />
<strong><span class="font-size-5">search GPS android App Trails SD Storeage Display:</span></strong><br />
<br />
<strong><span class="font-size-5">GPS Trails Lite</span></strong><br />
<strong><span class="font-size-5">Trail availability is limited. My tracks simply disappeared, along with my login. Better apps are imapmywalk and google maps mytracks. HTC incredible</span></strong><br />
<br />
<strong><span class="font-size-5">search google maps mytrack:</span></strong><br />
<strong><span class="font-size-5">My Tracks is an application for your AndroidTM phone that enables you to record GPS tracks and view live statistics – such as time, speed, distance, and elevation – while hiking, biking, running or participating in other outdoor activities. Once recorded, you can share your tracks, upload them to Google Spreadsheets and visualize them on Google My Maps.</span></strong><br />
<strong><span class="font-size-5"><a target="_self" href="{{#staticFileLink}}1200635734,original{{/staticFileLink}}"><img class="align-full" src="{{#staticFileLink}}1200635734,original{{/staticFileLink}}" width="400" /></a></span></strong><br />
<strong><span class="font-size-5">While recording tracks, you can:</span></strong><br />
<br />
<strong><span class="font-size-5">See location / progress on a map</span></strong><br />
<strong><span class="font-size-5">Monitor real-time statistics: time, distance, speed, elevation</span></strong><br />
<strong><span class="font-size-5">View elevation profile by time or distance</span></strong><br />
<strong><span class="font-size-5">Zoom, pan elevation profile</span></strong><br />
<strong><span class="font-size-5">Create waypoints</span></strong><br />
<strong><span class="font-size-5">Create statistics waypoints (splits tracks into subtracks)</span></strong><br />
<strong><span class="font-size-5">To share tracks, you can:</span></strong><br />
<br />
<strong><span class="font-size-5">Upload to Google Map (example)</span></strong><br />
<strong><span class="font-size-5">Upload to Google Docs (example)</span></strong><br />
<strong><span class="font-size-5">Email as a Google My Map link</span></strong><br />
<strong><span class="font-size-5">Embed Google Map on a website</span></strong><br />
<strong><span class="font-size-5">Email as .gpx or .kml attachments</span></strong><br />
<strong><span class="font-size-5">Export as .gpx or .kml to phone SD card</span></strong><br />
<strong><span class="font-size-5">Tweet your My Map link on Twitter using Twidroid</span></strong><br />
<br />
<strong><span class="font-size-5">My Tracks Frequently Asked Questions</span></strong><br />
<br />
<strong><span class="font-size-5">What is My Tracks?</span></strong><br />
<strong><span class="font-size-5">How do I install the My Tracks application?</span></strong><br />
<strong><span class="font-size-5">Which phones support the My Tracks application?</span></strong><br />
<strong><span class="font-size-5">How do I see the statistics and elevation profile?</span></strong><br />
<strong><span class="font-size-5">Why does the application sometimes display Waiting for a better GPS fix. Make sure the sky is visible?</span></strong><br />
<br />
<strong><span class="font-size-5">My Tracks records your GPS tracks and shows live statistics such as time, speed, distance, and elevation – while hiking, cycling, running or participating in other outdoor activities. Once recorded, you can share your tracks, upload them to Google Spreadsheets and visualize them on Google My Maps.</span></strong><br />
<br />
<br />
<strong><span class="font-size-5">App causing DroidX to panic logging statistics</span></strong><br />
<strong><span class="font-size-5">By Press9 - Sep 21 - 1 author - 0 replies</span></strong><br />
<strong><span class="font-size-5">Could not start MyTracks</span></strong><br />
<strong><span class="font-size-5">By rosenholms - Sep 20 - 5 authors - 7 replies</span></strong><br />
<strong><span class="font-size-5">Innaccurate recordings</span></strong><br />
<strong><span class="font-size-5">By Ken Taylor - Sep 19 - 17 authors - 22 replies</span></strong><br />
<strong><span class="font-size-5">[My Tracks] Navigation with Tracks</span></strong><br />
<strong><span class="font-size-5">By Gary Dunn - Sep 19 - 4 authors - 4 replies</span></strong><br />
<strong><span class="font-size-5">[My Tracks] Re: SPEED? ...as used in the CSV file</span></strong><br />
<strong><span class="font-size-5">By Sandor Dornbush - Sep 19 - 3 authors - 2 replies</span></strong><br />
<strong><span class="font-size-5">[My Tracks] updates and misc touches</span></strong><br />
<strong><span class="font-size-5">By Gary Dunn - Sep 19 - 2 authors - 1 reply</span></strong><br />
<strong><span class="font-size-5">CSV Download File Format</span></strong><br />
<strong><span class="font-size-5">By Ken Taylor - Sep 18 - 2 authors - 1 reply</span></strong><br />
<strong><span class="font-size-5">Polar Bluetooth Heart Rate Monitor</span></strong><br />
<strong><span class="font-size-5">By Leslie Wong - Sep 16 - 1 author - 0 replies</span></strong><br />
<strong><span class="font-size-5">[My Tracks] Benefits of GEarth over GMaps?</span></strong><br />
<strong><span class="font-size-5">By Karl Turek - Sep 16 - 2 authors - 1 reply</span></strong><br />
<br />
<strong><span class="font-size-5">These Applications enhance the functionality of My Tracks.</span></strong><br />
<br />
<strong><span class="font-size-5">Search for these Applications by name on the Android Market or scan the Application's barcode within the link. (To install the Barcode Scanner, search for "Barcode Scanner" on the Android Market).</span></strong></p>
</div>Take GPS Indoorshttps://landsurveyorsunited.com/hubs/gpsprofessionals/forum/take-gps-indoors2010-03-02T01:35:38.000Z2010-03-02T01:35:38.000ZJimhttps://landsurveyorsunited.com/surveyors/Jim<div><div id="pgtitle">Indoor Positioning</div><div id="innerArticle"><h1>Rosum, Siano Introduce ALLOY Chip Using TV Signals to Take GPS Indoors</h1><span class="innerArticle_span">March 1, 2010</span><hr/><br/><p>Rosum Corporation announced today the launch of ALLOY, a location and synchronization solution for indoor and urban environments. The ALLOY chip, which was developed in partnership with Siano — supplier of mobile digital TV receiver chips for handsets, laptops, PNDs, and other mobile devices — uses broadcast TV signals to provide precise frequency, timing, and location information. <br/><br/>According to Rosum, the chip opens up a multitude of new commercial opportunities by enabling femtocell synchronization and location, tracking of people and assets, and localized advertising over mobile TV devices in deep indoor locations such as shopping malls, hotels, campuses, and factories with seamless delivery leveraging broadcast TV signals.<br/> <br/>Traditional positioning systems are satellite-based, designed for outdoor applications and have limitations both indoors and in urban environments. The ALLOY client combines the ALLOY chip with a high-sensitivity assisted GPS chip into a tightly coupled hybrid TV-GPS solution which works across all types of environments: rural, suburban, urban, and indoor. Broadcast TV signals have a 100,000x power margin advantage over GPS, and this extends location and synchronization capabilities deep into buildings and urban environments.<br/> <br/>According to Dominique Bonte, Practice Director, Telematics and Navigation, for ABI Research, the market for wireless location-based applications is expected to reach $14.5 billion in 2014. “The success of these applications will depend on the pervasive availability of the location technologies that enable them. Alternative positioning technologies such as ALLOY are critical (in addressing the limitations of GPS)."<br/> <br/>“Femtozone location-based applications provide an enhanced value proposition in addition to the voice and data services that are being currently rolled out. By 2014, ABI Research expects 40 million unit shipments for femtocells. This presents an exciting market opportunity for innovative solutions like those from Rosum that solve problems of indoor positioning and synchronization, which are critical for mass-market femtocell deployment,” said Aditya Kaul, practice director, Mobile Networks for ABI Research.<br/><br/>Applications of ALLOY include femtocell synchronization and location, indoor and urban tracking of people and assets, and location-based services and advertising for mobile TV devices. Specific examples:</p><ul><li>Femtocells require accurate timing, frequency and location for quick start-up, interference management, and E911 location. Competing solutions can require 60-90 minutes or more to start-up and require placement by the window. ALLOY reduces this time dramatically (typically three minutes) and extends coverage deep indoors, where femtocells are most valuable.</li><li>Tracking service providers require continuous tracking across all environments — outdoor, indoor, and urban. High-value assets and people tend to be indoors or in urban areas where GPS signals are often unavailable, but TV signals are abundant. ALLOY keeps assets and people under monitoring in areas where GPS-based solutions fail.</li><li>Mobile services and advertisements are worth more when they are based on the precise location of the customer’s handset even when indoors, such as inside malls, campuses, etc. Location-enabled TV provides a platform for new and expanded revenue streams for broadcasters and carriers.</li></ul><p>“Rosum’s technology opens a new era in location-based applications and services,” said Alon Ironi, CEO of Siano. “Our cooperation with Rosum will enable every user of a handheld device to not only watch TV everywhere, but also benefit from an abundance of location-based services everywhere, even where the line-of-sight to the global positioning satellites is blocked.”<br/> <br/>“Siano’s high-performance, low-power Mobile DTV solution is the ideal platform for effective deployment of Rosum TV-location technology,” said Todd Young, VP Business Development of Rosum. “Partnering with Siano puts our robust location technology in an easy-to-integrate form factor for device makers worldwide.”<br/> </p></div></div>