Return-Path: <sentto-279987-3424-1004058963-fc=all.net@returns.onelist.com> Delivered-To: fc@all.net Received: from 204.181.12.215 [204.181.12.215] by localhost with POP3 (fetchmail-5.7.4) for fc@localhost (single-drop); Thu, 25 Oct 2001 18:17:07 -0700 (PDT) Received: (qmail 28519 invoked by uid 510); 26 Oct 2001 01:15:28 -0000 Received: from n20.groups.yahoo.com (216.115.96.70) by 204.181.12.215 with SMTP; 26 Oct 2001 01:15:28 -0000 X-eGroups-Return: sentto-279987-3424-1004058963-fc=all.net@returns.onelist.com Received: from [10.1.1.220] by n20.groups.yahoo.com with NNFMP; 26 Oct 2001 01:15:31 -0000 X-Sender: fc@red.all.net X-Apparently-To: iwar@onelist.com Received: (EGP: mail-8_0_0_1); 26 Oct 2001 01:16:03 -0000 Received: (qmail 59939 invoked from network); 26 Oct 2001 01:16:02 -0000 Received: from unknown (10.1.10.27) by 10.1.1.220 with QMQP; 26 Oct 2001 01:16:02 -0000 Received: from unknown (HELO red.all.net) (65.0.156.78) by mta2 with SMTP; 26 Oct 2001 01:16:02 -0000 Received: (from fc@localhost) by red.all.net (8.11.2/8.11.2) id f9Q1G6e21309 for iwar@onelist.com; Thu, 25 Oct 2001 18:16:06 -0700 Message-Id: <200110260116.f9Q1G6e21309@red.all.net> To: iwar@onelist.com (Information Warfare Mailing List) Organization: I'm not allowed to say X-Mailer: don't even ask X-Mailer: ELM [version 2.5 PL3] From: Fred Cohen <fc@all.net> X-Yahoo-Profile: fcallnet Mailing-List: list iwar@yahoogroups.com; contact iwar-owner@yahoogroups.com Delivered-To: mailing list iwar@yahoogroups.com Precedence: bulk List-Unsubscribe: <mailto:iwar-unsubscribe@yahoogroups.com> Date: Thu, 25 Oct 2001 18:16:06 -0700 (PDT) Reply-To: iwar@yahoogroups.com Subject: [iwar] [fc:U.S..raises.accuracy.of.civilian.positioning.system] Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit U.S. raises accuracy of civilian positioning system Rick Perera, IDG News Service, 10/24/2001 <a href="http://www.idg.net/ec?go=1&content_source_id=13&link_id=579808">http://www.idg.net/ec?go=1&content_source_id=13&link_id=579808> The U.S. Department of Defense (DoD) has released a new performance standard for its Global Positioning System (GPS), which increases accuracy for civilian users of the satellite-based navigation technology. GPS will now offer horizontal positioning accuracy of 36 meters, compared to the 100 meters laid down in a previous performance standard, which was published in 1995, DoD said in a statement. The new standard implements a policy change ordered by then-President Bill Clinton on May 1, 2000, discontinuing a practice known as "selective availability," which deliberately downgraded the accuracy of GPS for nonmilitary purposes. In a document publishing the new standard, DoD noted that GPS is increasingly important to civilian applications ranging from mapping and surveying to air traffic management and global climate change research. The department "promises to notify the civil user community whenever serious or unforeseen problems could affect the new performance level," DoD said. GPS faces potential competition from the European Space Agency (ESA) project known as Galileo, a planned network of 30 satellites orbiting at 24,000 kilometers about the earth, which ESA says will guarantee accuracy within as little as 4 meters. Galileo is scheduled to be in operation by 2008. Galileo is supposed to be compatible with GPS and the Russian Global Navigation Satellite System (GLONASS), meaning users will be able to use the same receiver to calculate positions from any of the satellites in the three systems. The U.S. National Aeronautics and Space Administration (NASA) has also developed a refinement of GPS, called BlackJack, which makes precise measurements of how radio signals transmitted by the positioning satellites are delayed and distorted in transmission. NASA says the system, currently in experimental deployment, delivers accuracy of 2 to 3 centimeters. DoD can be reached on the Web at http://www.defenselink.mil/. ESA, in Paris, is at http://www.esa.int/. NASA, in Washington, D.C., is at <a href="http://www.nasa.gov/">http://www.nasa.gov/>. ------------------------ Yahoo! Groups Sponsor ---------------------~--> Pinpoint the right security solution for your company- Learn how to add 128- bit encryption and to authenticate your web site with VeriSign's FREE guide! http://us.click.yahoo.com/yQix2C/33_CAA/yigFAA/kgFolB/TM ---------------------------------------------------------------------~-> ------------------ http://all.net/ Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
This archive was generated by hypermail 2.1.2 : 2001-12-31 20:59:57 PST