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Topic: Timing tracking accuracy

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overall accuracy

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short tracks

In the News (Thu 31 Dec 09)

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Hugh Jackman

	Timing recovery and tracking method and apparatus for data signals - Patent 6154506
		As for the timing recovery method of received data signals adopted for the digital communication systems, known is a simple method for assuming that the desired signal was just received at the moment when the voltage level of the received signal exceeds a predetermined threshold level to define that moment as a decision timing.
		At time t=t.sub.k, a new time window 101-2 with a middle point which is the moment 103-1 when the level of the received signal pulse 100-1 exceeds a predetermined threshold level 102 within a period of the time window 101-1 established at previous time t=t.sub.k-1 is set.
		At time t=t.sub.k, a new time window 501-2 with a middle point 503-2 which is a center sampling point among a plurality of sampling points with sampling levels higher than a threshold level 502 within a period of the time window 501-1 established at time t=t.sub.k-1 is set.
	www.freepatentsonline.com /6154506.html (3879 words)

	Two-axis tracking solar collector mechanism - Patent 5169456
		The tracking solar collector mechanism of claim 5 wherein said second mechanical coupling means (1.3.4.2) comprises a mechanical coupling on the circumference of a large-radius declination wheel segment which is centered on the associated declination unit's polar axis and rigidly attached to the unit's second structural member.
		The tracking solar collector mechanism of claim 1 wherein said first mechanical coupling means (1.3.2) comprises a mechanical coupling on the circumference of a large-radius polar wheel segment which is centered on the associated tracking module's polar axis and rigidly attached to the module's first structural member.
		The tracking solar collector mechanism of claim 26 wherein the polar drive element extends across and is mechanically coupled to the polar wheel segments of each of a plurality of tracking modules, and simultaneously transmits the polar tracking motion from a single polar tracking actuator to all of the coupled modules.
	www.freepatentsonline.com /5169456.html (6364 words)

	Inventory Accuracy article / white paper
		Tracking accuracy as flat numbers (number of errors) puts your more productive employees at a disadvantage and at an organizational level will be skewed by variances in business activity.
		Accuracy tracking should be communicated to staff in a positive manner; it is a tool to facilitate improvement in processes and people.
		If you're not tracking accuracy, your five-year employees may be making as many mistakes as they did during their 1st year.
	www.inventoryops.com /guide_inv_acc.htm (2786 words)

	Bandwidth Market, Ltd (Site not responding. Last check: 2007-11-03)
		time guard band: A time interval left vacant on a channel to provide a margin of safety against intersymbol interference in the time domain between sequential operations, such as detection, integration, differentiation, transmission, encoding, decoding, or switching.
		Time coordinates placed on the abscissa (x-axis) of Cartesian-coordinate graphs used for depicting waveforms and similar phenomena.
		time standard: A stable device that emits signals at equal intervals such that their count may be used as a clock.
	www.telequipment.com /resources/glossary/T4.html (1305 words)

	Telescope drive tracking accuracy
		Accurate tracking is also important for very long focal length webcam imaging of the planets, as the field of view is extremely narrow.
		If we know that the motor tracking speed is correct, we know that any accumulating drift in RA is caused by bad polar alignment.
		Consequence of poor tracking for Astromeccanica controller: If a webcam imaging session started with a star at the center of the field of view, the star will have drifted off the webcam chip after 1hour 37min.
	www.arnholm.org /astro/tracking (762 words)

	A Case for Created Time
		The timing configuration of the current Earth-Moon points to the possibility of a specific time in the past when the phase rate of the Earth did perfectly align with 7 sets of 7 lunar months--as is documented in the previous chapter.
		If interrelated time cycles (such as the synodic-month cycle at 19 years) can be identified then a conjunction between the respective time cycles can be predicted to reoccur--but only for as many times as the difference between the two time cycles will permit.
		Terrestrial Time (TT), (or Terrestrial Dynamical Time, TDT), with unit of duration 86400 SI seconds on the geoid, is the independent argument of apparent geocentric ephemerides.
	www.creation-answers.com /time.htm (14363 words)

	The Height of Precision - GPS World
		The accuracy of the differential GPS (DGPS) configuration we used is a function of the baseline separation between the rover station and its reference counterpart.
		To determine sensor-pair accuracy and identify the level of background noise, we conducted nearly 40 static and dynamic calibration tests during spring 2002, in an open field sufficiently free from potential sources of multipath error and with limited obstructions to preserve a 15° mask angle.
		In this test, the tracking is quite good, even at lower amplitudes of motion, with the RMS error at 8 percent and error in peak values at 9 percent.
	www.gpsworld.com /gpsworld/article/articleDetail.jsp?id=68452&pageID=2 (1042 words)

	Development of the Mercury Communications Network and Worldwide Sites (Site not responding. Last check: 2007-11-03)
		Mission specifications required that radar tracking contact with the capsule be continuous during the launch and insertion phases of flight.
		Additional tracking data would be required for a more precise determination of orbital parameters while in orbit, and for as accurate a retrofire position as possible to assure an accurate landing zone.
		The timing system, which had been developed for the scientific satellite tracking stations, was selected since it had proved to be reliable and accurate under actual field operating conditions.
	www.angelfire.com /space2/sp425/26.html (4262 words)

	Sawtooth VCO (Site not responding. Last check: 2007-11-03)
		The problem turned out to be that the discharge time was too short, causing a variation in the discharge level due to the temperature dependence of the FET's channel ("on") resistance.
		The circuit's tracking accuracy is perfect, as close I could measure it.
		The switching reset time is under 0.5 usec, consistent with the OPA132 slew rate and settling time.
	home.earthlink.net /~ijfritz/sy_cir2.htm (816 words)

	EYE TRACKING IN VIRTUAL ENVIRONMENTS
		The timing interrelationship of the speech and the eye movement would then tell us exactly where the "there" implied by the speech is located despite having a very noisy set of eye movements.
		The gaze tracking accuracy has been observed to be very sensitive to head movement and it is very easy to lose calibration.
		For the current eye tracking system, stable performance requires that all of the eye tracker parameters like maximum and minimum pupil size, maximum and minimum corneal reflection size etc., have to be accurately adjusted for each user.
	vehand.engr.ucf.edu /handbook/Chapters/Chapter8/Chapter8.html (5198 words)

	Case Studies
		We assessed presentation onset and duration accuracy, synchrony between tones and visual stimuli, tone duration and the accuracy of response registration.
		In this case the experimenter had the opportunity to correct the response timing post-hoc for trials involving audio as the error was consistent.
		This suggests that if display accuracy and synchronicity is crucial to your paradigm then you should either use a CRT or check the timing.
	www.blackboxtoolkit.co.uk /case_studies.html (1035 words)

	Concrete Producer, The: Getting the timing right: by tracking a simple thing like time, producers are finding more ways ... (Site not responding. Last check: 2007-11-03)
		Where managers and dispatchers once relied on a series of radio signals to track daily activity, now the process is a touch away.
		Thus, the common plant activities such as an employee's start time, the start of a batching process, and a delivery activity can be tracked from one database.
		The time stamp and all other company information is stored in a Web-enabled set-up for each individual company and is password-protected for security.
	findarticles.com /cf_dls/m0NSY/8_21/106585465/p1/article.jhtml (1485 words)

	AN/FPS-115 PAVE PAWS Radar
		The radar is used primarily to detect and track sea-launched and intercontinental ballistic missiles.
		The maximum possible use of the radar resource for combined surveillance and tracking activities is 25 percent and is the operating condition that produces the maximum possible power density.
		Under very exceptional circumstances of heavy tracking assignment the duty cycle of either face can be increased to 25%; under those conditions the duty cycle of the other face is necessarily reduced to 11%.
	www.fas.org /spp/military/program/track/pavepaws.htm (1816 words)

	Clockware Timesheet and Time Tracking Software. Project Timesheet, Timesheet for Payroll, Attendance Timesheet, and ...
		Clockware, the timesheet technology leader, provides proven 100% web-based time and attendance, project time tracking, leave tracking, comp and flex time tracking systems that are proven to save customers millions of dollars a year.
		Clockware Timesheets 4.4 technology is the only time tracking system that is J2EE compliant, providing the most highly scalable and easily configurable time and attendance, project time tracking and leave tracking platform in industry today.
		The new leave tracking system has no natural limit to the number of balances that can be tracked, and allows for system adjustments and accruals.
	www.clockware.com (1440 words)

	eNewsletter for scientists (Site not responding. Last check: 2007-11-03)
		Gross pointing of SOFIA to within 3 degrees of the desired target is determined by the flight path of the aircraft and the coarse elevation gear drive of the telescope, which operates from 20 to 60 degrees elevation angles.
		Angular motion of the gyros is determined by timing the arrival of light pulses traveling through the two sets of fiber in opposite directions.
		For night time observations or for bright objects such as planets, updates of the gyros will be made as needed by observing objects in the focal plane CCD imaging camera or the tracker cameras to achieve higher pointing and tracking accuracy.
	www.sofia.usra.edu /Science/newsletter/2002/newsletter_2002_v5.html (630 words)

	ESA - GSP - Infrastructure03/N49
		Accurate tracking is mainly driven by two factors, the intrinsic performance of a particular method, and Ground Station frequency stability.
		Tracking accuracy requirements for Deep Space missions are continuously getting more and more demanding.
		Apart from Ground Station Stability figures, there is a need to understand how new tracking methods could be performed from the Agency's current and upcoming Deep Space Ground Station facilities, and moreover, what modifications would be needed.
	www.esa.int /SPECIALS/GSP/SEMME4ZO4HD_0.html (410 words)

	Primex Wireless - Manufacturing Clock System - Industrial Clocks
		We originally purchased it to install in our new addition only, but it worked so well that we decided to retro-fit it into the whole plant.
		You may pride yourself on the precision of your manufacturing processes or ability to fill large orders on short notice - but if your timekeeping is less than perfect, you're leaving a big gap in your quest for continuous improvement.
		Primex Wireless can help you synchronize your timing system, even if you have multiple plants or the largest of facilities.
	www.primexwireless.com /Manufacturing (168 words)

	Guiding Techniques for Astrophotography
		Since the telescope is moving the entire time that an exposure is in progress, the centre of gravity of the mirror changes constantly and it is inevitable that it will shift during an exposure.
		The amount and timing of such shift cannot be predicted - all that can safely be predicted is that the longer the exposure, the more likely it is that the mirror will shift.
		During this time, closely observe the X and Y corrections and try to understand what is happening.
	www.astrocruise.com /guide.htm (5830 words)

	TDRSS Overview
		The Tracking and Data Relay Satellite System (TDRSS) is a communication signal relay system which provides tracking and data acquisition services between low earth orbiting spacecraft and NASA/customer control and/or data processing facilities.
		A new perspective, one that has only been glimpsed a few times before, is being provided by a telescope known as the Far Ultraviolet Spectroscopic Explorer, or FUSE.
		The Rossi X-ray Timing Explorer (RXTE) launched aboard a Delta II rocket December 30, 1995 from Cape Canaveral Air Force Station, Fla. into a low Earth orbit at an altitude of 362 miles (580 km) and an inclination of 23 degrees.
	msp.gsfc.nasa.gov /tdrss/oview.html (1911 words)

	Improved Mobile Phone Tracking Accuracy Announcement from Trace A Mobile.com
		The technology measures the timing and power of GSM mobile phone signals from 3 or more base stations to increase its Location Based Services (LBS) accuracy by up to 300 per cent.
		Explaining the new system Managing Director Jonathan Cook said, "The timing of the bursts transmissions is very important to track mobile phones.
		The aim of Timing Advance is that the mobile trace signals coming from the different mobile stations arrive at the base station at the right time so it can locate a mobile much more accurately."
	www.prweb.com /releases/2005/2/prweb213061.htm (516 words)

	Business: Accounting - Open Site (Site not responding. Last check: 2007-11-03)
		Includes the timing and the issuing of payments, debt management, and the negotiation of payment terms to creditors and suppliers.
		Includes the issuing of payment due notices, the tracking of current and late payments due to the company, and the arrangement of terms with the companies customers and other debtors.
		Internal auditors verify the accuracy of their organization’s internal records and check for mismanagement, waste, or fraud.
	open-site.org /Business/Accounting (1373 words)

	Rally Star - For all the latest motorsport news as well as motorsport events - Timing, Spectators and other interesting ... (Site not responding. Last check: 2007-11-03)
		All 90 cars will have ISC-T (International Sportsworld Communicators-Technology) tracking and timing equipment fitted, enabling the rally organisers to pin-point the exact location of every car to within 10 metres and provide Special Stage times to one-tenth-of-a-second accuracy.
		Rally GB is sponsored for the 10th consecutive year by Network Q, the UK’s award-winning used car brand with over 460 outlets in the UK, selling in excess of 120,000 cars of all makes each year.
		The Service Park at Felindre, Wales, near Swansea is visited 11 times during the 1,641 kilometre rally.
	www.rallystar.co.za /article/articleview/506/1/68 (580 words)

	What's New November 2004 (Site not responding. Last check: 2007-11-03)
		At that time, major consideration was given to the Fulda Gap, the terrain corridor along which Soviet Bloc troops attacking NATO were expected march.
		For the first time, data were transferred in real time via mobile communication at a speed of one gigabit per second (Gbit/s); that equates to 1,000 megabits per second (Mbit/s).
		By the time the next generation of mobile communication debuts, which is expected to occur beginning in the year 2015, the need for transmission capacities for voice, data, image and multimedia is conservatively anticipated to rise by a factor of 10.
	www.simulationinformation.com /whatsnewdecember2004.html (8773 words)

	LJT & Associates
		The 2600 Series antenna is the "antenna of choice" for smaller (1.0– 3.1 m) full motion tracking antenna applications, providing exceptionally high performance at a surprisingly affordable price.
		The 2600 Series antenna is a completely integrated satellite tracking system, including an elevation-over-azimuth positioner, embedded power supply and ACU (Antenna Control Unit), PWM (Pulse Width Modulation) servo controller, a GPS timing system, and an integrated microprocessor for tracking control and scheduling.
		An integrated microprocessor running Windows controls the antenna's communications and tracking functions, allowing the antenna to operate independently and efficiently.
	www.ljt.com /2600series.html (248 words)

	Factsheets : Pave Paws Radar System : Pave Paws Radar System (Site not responding. Last check: 2007-11-03)
		The radar is used primarily to detect and track sea-launched (SLBM) and intercontinental ballistic missiles (ICBMs).
		Phased array antenna aiming, or beam steering, is done rapidly by electronically controlling the timing, or phase, of the incoming and outgoing signals.
		This greatly reduces the time necessary to change the beam direction from one point to another, allowing almost simultaneous tracking of multiple targets while maintaining the surveillance responsibility.
	www.af.mil /factsheets/factsheet.asp?fsID=168 (521 words)

	Seminars at Brain and Vision Laboratory, Boston University (Site not responding. Last check: 2007-11-03)
		This was contrasted to smooth pursuit in a nonpredictable situation where timing of the audio cue, the velocities and directions were balanced but pseudo-randomised.
		Comparison of smooth pursuit with the control condition revealed statistical parametric maps in a network of brain areas known to be involved in visuomotor tasks and motion processing including prefrontal, premotor, medial temporal, parietal and cerebellar areas.
		These changes in activation over time may be associated with a type of short-term learning of the timing and eye movement trajectory and are reminiscent of findings in other types of motor and sequence learning.
	www.bu.edu /bravi/seminars/schmid2000_abstract.html (364 words)

	Documents @ NESL : On the Interaction of Network Characteri...
		Energy efficiency is highly application-specific and as a result designing a sensor network algorithm is also performed under the constraints of a specific application such as latency and accuracy.
		Traditional target tracking disregards the underlying sensor measurement transport mechanism and focuses on the algorithm performance (tracking accuracy) based on parameters such as the number of trackers.
		Moreover the timing constraints of target tracking combined with the nature of the underlying network (wireless, multi-hop) which drops or delays measurements introduces run time energy, latency and accuracy tradeoffs.
	nesl.ee.ucla.edu /document/show/137 (316 words)

	Improved Mobile Phone Tracking Accuracy Announcement From Trace A Mobile.com (Site not responding. Last check: 2007-11-03)
		Improved Mobile Phone Tracking Accuracy Announcement From Trace A Mobile.com
		LONDON, March 8 /PRNewswire/ -- UK based mobile phone tracking company Trace A Mobile.com today announced it was now using an advanced software system called Timing Advanced mobile phone tracking (TA) to allow improved phone tracking accuracy of up to 50 metre range for the Vodafone network.
		Other new LBS technology also planned by the company is Assisted GPS.
	www.forrelease.com /D20050308/1184620.html (396 words)

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