Polychaeta
Polychaeta (bristleworms; phylum Annelida) A class of worms which possess distinct
metameric segmentation. They have numerous
chaetae borne in sheaths on the
parapodia on each body segment. Eyes and
tentacles may be present. Most polychaetes are
dioecious but a few species are
hermaphrodites. Most are marine, although some occur in fresh water and on land. The group first appeared in the
Cambrian (polychaetes are the only annelids to have a fossil record) and it contains more than 5000 species.
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Rx Networks Announces GPStream(TM) SUPL 1.0 AGPS Client With Extended Ephemeris Capability.
PR Newswire; 2/7/2008; 700+ words
; ...client solution with extended ephemeris capability designed to reduce GPS start up times of mobile handsets and deliver...environment." AGPS Performance Real time GPS accuracy when operating...required. This is at least ten times smaller than proposed SUPL...chipset proprietary extended ...
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Rx Networks Announces GPStream SUPL 1.0 AGPS Client With Extended Ephemeris Capability.
Magazine article from: Space Daily; 2/11/2008; 700+ words
; ...client solution with extended ephemeris capability designed to reduce GPS start up times of mobile handsets and deliver...environment." AGPS Performance Real time GPS accuracy when operating...required. This is at least ten times smaller than proposed SUPL...chipset proprietary extended ...
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Taiwanese Inventor Developds Global Positioning System Ephemeris Data Updating System
News Wire article from: US Fed News Service, Including US State News; 9/24/2008; 475 words
; ...The method for updating GPS ephemeris data includes the following...counting down a predetermined time; next, searching a GPS ephemeris data server through a network...performing a download from the GPS ephemeris data server so as to update...
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NemeriX launches NeX Extended Ephemeris Solution; Delivers twice the location accuracy of competing solution Time-to-first-fix in less than one-fifth the time Innovative implementation allows transmission over a multitude of media Offered free as part of the NemeriX GPS solution.
M2 Presswire; 2/12/2007; 700+ words
; ...NemeriX launches NeX Extended Ephemeris Solution; Delivers twice the...accuracy of competing solution Time-to-first-fix in less...TM) - NemeriX's Extended Ephemeris solution. NeXenables mobile...environments. NemeriX's Extended Ephemeris is a key component of Assisted...
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The New American Ephemeris for the 21st Century.(The New American Ephemeris for the 21st Century: 2000-2100 at Midnight)(Brief article)(Book review)
Newspaper article from: Small Press Bookwatch; 12/1/2006; 588 words
; The New American Ephemeris For The 21st Century Rique...edition of "The New American Ephemeris For The 21st Century...column phenomena sorted by time as well as by date; and...astrology. "The New American Ephemeris For The 21st Century...
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Stand-alone real-time GPS positioning without SA
Magazine article from: Sea Technology; 3/1/2002; ; 700+ words
; ...manipulation of the broadcast ephemeris data and dithering of the satellite...past midnight Eastern Daylight Time (EDT) after the end of May...and 365 days a year in real-time at any location all over the...tropospheric delay, clock and ephemeris error, multipath effect and...
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Accurate time assistance: synchronizing GSM mobile telephones to microseconds.(INNOVATION)
Magazine article from: GPS World; 7/1/2005; ; 700+ words
; ...position fix within an acceptable time interval. Users in locations...clock, synchronized to GPS Time. With such an accurate clock...satellite information, GPS time information, and coarse position...assistance information: satellite ephemeris and almanac data, time aiding...
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Self-Assisted GPS: no server, no connection requirement.(COMMUNICATIONS/TRANSPORTATION)
Magazine article from: GPS World; 9/1/2008; ; 700+ words
; ...a recent, but expired, ephemeris for the satellites in view...Earth oblateness. Autonomous ephemeris prediction on the unconnected...minutes in urban canyons. The time-to-first-fix (TTFF...the warm start, when new ephemeris data is required some hours...innovations bring extended ...
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Atheros Provides Advanced Navigation And Low Power In Handsets, PNDs And PMPs.
Magazine article from: Space Daily; 4/30/2008; 700+ words
; ...connectivity to real-time, Internet-accessed ephemeris when in the presence...power. - Extended Ephemeris when real-time access is unavailable...and reacquisition times with high location...to obtain real-time location information...
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Atheros Enhances GPS User Experience with Advanced Navigation and Low Power in Handsets, PNDs and PMPs.
PR Newswire; 4/28/2008; 700+ words
; ...connectivity to real-time, Internet-accessed ephemeris when in the presence...Ephemeris when real-time access is unavailable...also supports extended ephemeris, stored satellite orbital...TTFF and reacquisition times with high location accuracy...networks to obtain real-time ...
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Ephemeris Time
Book article from: A Dictionary of Astronomy
Ephemeris Time ( ET ) The time-scale that was used...to 1984. Its fundamental unit was the ephemeris second which was defined by the statement...1900.0 was precisely 31 556 925.9747 ephemeris seconds. Ephemeris Time was in many...
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ephemeris time
Book article from: The Columbia Encyclopedia, Sixth Edition
ephemeris time (ET), astronomical time defined by...solar day is an imprecise unit of time. Ephemeris time is calculated from the positions...contain 31,556,925.9747 sec of ephemeris time. In 1984 ephemeris time was renamed...
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ephemeris
Book article from: A Dictionary of Astronomy
ephemeris A table giving the predicted positions of a celestial object at given times; pl.ephemerides. Collections of ephemerides for various objects are published in yearly almanacs, such as The Astronomical Almanac .
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atomic time
Book article from: A Dictionary of Astronomy
atomic time The time-scale used for all precise timekeeping...was the same as that of a second in Ephemeris Time , the time-scale then used in...Terrestrial Time ) was introduced to replace Ephemeris Time. Terrestrial Time has the SI second...
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dynamical time
Book article from: A Dictionary of Astronomy
dynamical time The time-scale that is used in calculating orbital...gravitation. In Newtonian gravitation, time plays a fundamental role; it is absolute...scale that was used until 1984 was called Ephemeris Time . Since then, however, relativistic...
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