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Topic: Fix (position)


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In the News (Sat 20 Apr 19)

  
  Fix (position) - Wikipedia, the free encyclopedia
A position fix or simply a fix is a term used in position fixing in navigation to describe a position derived from measuring external reference points.
Fixes are a necessary part of navigation by dead reckoning because dead reckoning relies on estimates of speed, course.
The fix confirms the actual position during a journey.
en.wikipedia.org /wiki/Fix_(position)   (199 words)

  
 Navigation - Printer-friendly - MSN Encarta
In celestial navigation, navigators derive an estimated position by plotting the celestial circle of position on a special chart called a plotting sheet.
The estimated position lies on the point where the circle of position intersects the dead reckoning track.
The software calculates the craft’s position from data entered by the navigator, such as the name of the celestial body, its vertical angle in degrees, minutes, and seconds, and the time the measurement was taken.
encarta.msn.com /text_761574467___15/Navigation.html   (756 words)

  
 [No title]
Fix types are compared, and the appropriate fix position data type is selected for use.
All subsequent fixes are referenced against this origin position to get a calculated difference in latitude and longitude milli-seconds of arc from the fix position to the origin position.
Position determination while crossing the baseline is a problem because the ranges are identical from one side of the baseline to the other.
www.cs.nps.navy.mil /research/auv/theses/mcclarin/chapter4.html   (3460 words)

  
 Getting A Fix with your Garmin
While the unit is acquiring its position this is a changeable field on most units and may be selected just by using the arrow keys to select the field.
The receiver uses the almanac data to estimate the position of the satellite it is interested in and to predict its doppler shift speed.
fixed typos and revised for etrex and emap 00/7/27
www.gpsinformation.org /dale/gpsfix.htm   (4395 words)

  
 Fixing and Freeing Region Markers   (Site not responding. Last check: 2007-10-13)
Parameters can be fixed using the fix option of the regions public access point (for fixing classes of markers) or by means of a fix keyword in the definition of an externally loaded marker.
The specification of fix params is relative (or additive), that is, new specifications are added to existing ones.
The "fix:" keyword is used to specify a different set of fix params for each marker (except for source3, which is left free).
hea-www.harvard.edu /RD/saotng/fixregions.html   (881 words)

  
 Emergency reporting for marine and airborne vessels - Patent 5355140
The time of occurrence and vessel position and, optionally, type of event, vessel velocity heading, and quality of vessel position fix at that time are broadcast on a marine or aircraft emergency frequency to all nearby emergency response facilities, by voice or by digitally encoded message.
The present position of the vessel 11 is broadcast as a distress signal 17 in a continuing manner, along with identification of the vessel, by a transmitter 19 that receives vessel position and, optionally, vessel velocity and position fix quality information from the position-indicating module 15.
The decoded position signal is received on the second signal line 73 by a position display module 81 (optional) that displays the present position of the vessel in an alphanumeric display of latitude and longitude, or graphically, or both.
www.freepatentsonline.com /5355140.html   (5386 words)

  
 Lines of position form a Position fix: 4 Plotting, piloting.
A fix is determined by the simultaneous intersection of LOP's.
An estimated position is based upon whatever incomplete navigational information is available, such as a single LOP, a series of depth measurements correlated to charted depths, or a visual observation of the surroundings.
Dead reckoning is a technique to determine a ship's approximate position by applying to the last established charted position a vector or series of vectors representing true courses and speed.
www.sailingissues.com /courses/navigationcourse4.html   (2113 words)

  
 Garmin: GPS Glossary   (Site not responding. Last check: 2007-10-13)
A position's distance north or south of the equator, measured by degrees from zero to 90.
Fixes the GPS receiver’s map display so north is always fixed at the top of the screen.
Fixes the GPS receiver’s map display so the current track heading is at the top of the screen.
www.garmin.com /aboutGPS/glossary.html   (3623 words)

  
 How To Find Your Position At Sea:
With a sextant and a chronometer, we could fix our position just as with the sun, and that is what astronomers do on land, but that is impractical at sea because you can't see the horizon at night from which to measure altitudes.
It is defined as the angle between the plane of longitude fixed by the Vernal Equinox and the plane of longitude of the star.
Because the earth's axis is fixed in the universe of stars, doesn't change direction relative to the stars as the earth rotates, the GP for a particular star traces out a circle of latitude on the earth.
www.johnforester.com /Maritime/CelestialNav2.htm   (7116 words)

  
 boats.com - Feature: Position Fixing Made Easy
A simultaneous fix is usually more reliable than a running fix because accurate advancing of earlier LOPs depends on accurate estimates of current and leeway.
This line is the first position line advanced and it should be marked by its direction, the time of its observation, and the time (of the second bearing) to which it's advanced.
The accuracy of these fixes depends not only on the accuracy of the bearings and their angle of crossing, but also on your accuracy in estimating the leeway and current that affect the "run" between the bearings.
www.boats.com /content/boat-articles.jsp?contentid=2926   (2154 words)

  
 PocketMap.com >> PocketMap GPS Accessories >> Troubleshooting
Position fixing may not be available when this receiver is used near high-voltage wire, electronic equipment that generates electrical noise, or mobile phones in operation at a frequency of 1.5 GHz.
In case the receiver is unable to fix a position within 90 seconds, we recommend resetting the PocketMap CF GPS receiver unit by simply disconnecting the receiver from the Pocket PC and plugging it back in ten seconds later.
When obtaining a position fix, it is best to remain stationary in an open area with an unobstructed view to the sky.
www.pocketmap.com /accessories/troubleshooting.html   (2030 words)

  
 Ocean Navigator Online - Running with the sun
A DR position, plotted for the same time as the LOP, is the critical reference for focussing the navigator's attention to the appropriate segment of his line.
Naturally, a navigator would prefer to fix his position, but this is an elusive goal so long as there is only one celestial body available.
Without a DR position, there is no signal to the navigator that his vessel is not performing as he expects.
www.oceannavigator.com /article.php?a=1307   (1972 words)

  
 STARSYS TO OFFER POSITION FIX SERVICE   (Site not responding. Last check: 2007-10-13)
The Argos communications system which gathers and relays environmental data from fixed and mobile satellite transmitters world-wide is a joint effort between NOAA and the U.S. and French space agencies.
Until now, the one-way position and location service has been reserved for environmental groups to track animals as well as monitor active volcanoes, oil spills and potentially hazardous cargos.
It is merely to demonstrate the usefulness of a position and location system, as well as to begin to generate a customer base and determine customer needs, said Renshaw.
dev.space.com /spacenews/archive92/sn1992.fff854.html   (660 words)

  
 Dave's Marine Fixed Mount GPS Receivers Chart Plotters by furuno garmin raymarine northstar lowrance magellan
Fix -- Defining position, where two lines such as latitude and longitude cross, as determined by one or more navigation aids or techniques.
Geostationary Satellites -- Those satellites situated in a constant orbit position relative to a given area of the globe with the purpose of maintaining constant coverage of that area.
Position Format -- The way in which the GPS receiver's position will be displayed on the screen.
www.brokenlegdave.com /fixed_mount_gps.htm   (2329 words)

  
 Obtaining a Position Fix   (Site not responding. Last check: 2007-10-13)
To triangulate your position, you must be able to see at least two distinct physical features that you can also identify on the map.
Without further rotating the compass vial lay the compass on the map so that the long straight edge of the baseplate touches the same feature on the map and the north-south ruler lines on the vial are aligned with the north-south orienting lines on the map.
Estimate your position as the center of the intersecting areas.
members.aol.com /annapress/Wild7.html   (594 words)

  
 theory
There are the satellites that transmit the position information, there are the ground stations that are used to control the satellites and update the information, and finally there is the receiver that you purchased.
In addition to the data already mentioned the unit uses Doppler data from the moving satellites, almanac data to figure out the approximate positions of all the satellites, and ephemeris data download directly from the satellite that can be used to compute its position in the sky.
A unitless number representing this geometry is called Dilution Of Position, DOP and is used by the gps in determining which of the satellites available represents the best ones to use.
www.gpsinformation.org /dale/theory.htm   (2116 words)

  
 StarPilot -- USNO Fix   (Site not responding. Last check: 2007-10-13)
The computed Lat and Lon of the fix is then displayed along with the distance from the DR to the fix position.
July 4, 1999 DR position at 21:00 UT is 32° 00' N, 15° 00' W. Course is 325T and speed is 20 kt.
Note that it is naturually the first range and bearing from DR to fix that is important to note for your records, ie to see how good your DR was, but it is always the last computation of the position fix that is the most accruate and should be stored.
www.starpilotllc.com /usno.htm   (471 words)

  
 FIX: Position Error: Outline Control on Classed Pageframe
If an outline control is placed on a page of a pageframe and that pageframe is saved as a class, the class is repositioned during its use in designing a form.
Position and size the outline control on the pageframe so that it looks as you would want it to look on a user's form.
Observe that the OLE Outline control is positioned off of the pageframe.
support.microsoft.com /kb/146223   (576 words)

  
 Re: Can you navigate to a fix?
The position with the greater range is established at the outer
The position with the lessor range is established at a point
>> between the aircraft position and the fix is proportional to the
www.forpilots.com /archive/rec.aviation.ifr/3/msg3736.htm   (800 words)

  
 Resetting the path integrator: a basic condition for route-based navigation -- Etienne et al. 207 (9): 1491 -- Journal ...
In trials with a fix (right), the room lights are turned on for 10–12 s during or at the end of the outward trip, when the subject is located at P1.
During a fix, the homing directions based on PI on the one hand, and on visual references on the other hand, diverge by 98°.
Each pair of large circles represents the arena in its clockwise (left) or counterclockwise (right) rotated position, and the two dashed lines inside are the two-leg outward journeys starting at the current position of the nest.
jeb.biologists.org /cgi/content/full/207/9/1491   (10646 words)

  
 Coastal Navigation Course - Chapter X1II - Putting it all Together
Since this estimated position seems to be putting you back where you should have been at approximately 0940 this morning, it would appear that if you do nothing to correct your course you will be going in circles or perhaps worse "back in time!"
From this position, you decide to make way for Swift Beach on a course of 340° T. Again ignoring set and drift, you proceed at 4.7 kts and figure you'll just get a running fix at 1110 to check your progress.
From your 1110 running fix position, at a speed of 6 kts, what direction will you steer PSC (your deviation is 2° W) to get to the waypoint you entered?
www.boatsafe.com /nav/anschap13_1.htm   (742 words)

  
 Fix - Wikipedia, the free encyclopedia
Look up fix in Wiktionary, the free dictionary.
Fix (position), the result of position fixing in navigation
FIX protocol, a communications protocol for financial information exchange
en.wikipedia.org /wiki/Fix   (116 words)

  
 Marine navigation courses: Lines of position, position fixes: 4 Plotting & piloting.
He included tidal information and the positions of conspicious objects in the chart.')" width="21" height="12" border="0"> and proved a milestone in the development of European cartography.
reckoning.')" width="21" height="12" border="0"> is a technique to determine a ship's approximate position by applying to the last established charted position a vector or series of vectors representing true courses and speed.
Cross bearing: The use of LOP's of several navigational aids to obtain a position fix.
www.sailingissues.com /navcourse4.html   (2280 words)

  
 How Your GPS Works   (Site not responding. Last check: 2007-10-13)
There are the satellites that transmit the position informtion, there are the ground stations that are used to control the satellites and update the information, and finally there is the receiver that you purchased.
Since we can calculate the pseudorange and satellite positions independantly and we can factor in modeling information from hardcoded data we are left with four unknowns, X, Y, Z, and T. Therefore we need 4 equations to solve for the 4 unknowns.
These terms are needed because our solution is based on moving objects and dx and dy can be used as part of the receiver speed calculation (dz is discarded).
www.cs.nmsu.edu /~jbj/index_auxil/depriest.htm   (2142 words)

  
 stu nicholls | CSS PLaY | emulating position fixed for Internet Explorer
This page has a fixed menu in the top left hand corner of the screen.
Just take a peek at the source code to see that all it takes is a setting of height:100% for the body (with overflow-y:auto) and it works.
The only problem with this is that you cannot use absolute or relative positions on the moving page but float is allowed.
www.cssplay.co.uk /layouts/fixed.html   (267 words)

  
 ATLAS Drag Panel Control (Easy Fix for Position Reset)
If you are using the ATLAS Drag Panel Control then you might have noticed that when you drop the panel on the screen it goes back to its original position.
There is a very easy fix to this problem.
The Drag panel might be using the Z-index set to 999 which means it is at the top of all the layers.
geekswithblogs.net /azamsharp/archive/2006/09/17/91417.aspx   (218 words)

  
 Fixing position:fixed for Windows Internet Explorer
will be fixed in respect to the viewport, absolutely positioned elements
element to be fixed in respect to the viewport.
On 2002-02-05 someone dumped a query regarding fixed document content in the Dutch news group
devnull.tagsoup.com /fixed   (491 words)

  
 Butane Stove
If burner knob is in ON position when flame is not burning, there is gas escaping which could cause an accident.
In case of abnormal combustion or emergency, turn the knob to OFF position, which will stop gas, and then turn the Cartridge Fix Lever to off and take fuel cartridge out.
Place the new fuel cartridge after checking that the container fix lever is in the release position.
www.partyplusrentals.com /HTML/instructions/butane.html   (1261 words)

  
 FOX Sports - Fantasy - FOXSports.com Fantasy Fix   (Site not responding. Last check: 2007-10-13)
Find out if Peyton Manning's four touchdowns against Cincy were enough to place him amongst the top fantasy QBs in Week 16.
This email and others are answered on Fantasy Fix.
The clock is ticking on your fantasy season.
msn.foxsports.com /fantasy/story/6274690   (304 words)

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