30 Years of the Digest ... founded August 21, 1981
The Telecom Digest for December 23, 2011
====== 30 years of TELECOM Digest -- Founded August 21, 1981 ======
Telecom and VOIP (Voice over Internet Protocol) Digest for the
Internet. All contents here are copyrighted by Bill Horne and
the individual writers/correspondents. Articles may be used in other
journals or newsgroups, provided the writer's name and the Digest are
included in the fair use quote. By using any name or email address
included herein for any reason other than responding to an article
herein, you agree to pay a hundred dollars to that person, or email address
Addresses herein are not to be added to any mailing list, nor to be sold or given away without the explicit written consent of the owner of that address. Chain letters, viruses, porn, spam, and miscellaneous junk are definitely unwelcome.
We must fight spam for the same reason we fight crime: not because we are naive enough to believe that we will ever stamp it out, but because we do not want the kind of world that results when no one stands against crime. - Geoffrey Welsh
See the bottom of this issue for subscription and archive details and the name of our lawyer, and other stuff of interest.
Date: Fri, 23 Dec 2011 09:18:08 +1100 From: David Clayton <firstname.lastname@example.org> To: email@example.com. Subject: Next wave of GPS promises stronger signals Message-ID: <MOHg3B.A.58G.ToA9OB@telecom> Next wave of GPS promises stronger signals DAN ELLIOTT December 19, 2011 The future of the Global Positioning System is taking shape in a vast white room south of Denver, where workers are piecing together the first of more than 30 satellites touted as the most powerful, reliable and versatile yet. The new generation of satellites, known as Block III, will improve the accuracy of military and civilian GPS receivers to within about one metre, compared with about three metres now, according to the Congressional Budget Office. Block III will also have additional signals for civilian use - one brand new, others already in the first stages of deployment - offering more precision and making more navigation satellites available to civilian receivers. "It's a really big jump," said Colonel Harold "Stormy" Martin of the Air Force Space Command. "With these additional signals, the additional power it's going to bring, it's quite a leap from the other systems." Block III may not be a bigger advance than previous generations of GPS satellites were, said Glen Gibbons, editor of the website and magazine Inside GNSS, which tracks global navigation satellite systems. "But I'm completely comfortable saying that it will be a very substantive advance," Gibbons said. GPS has spread into nearly every corner of civilian and military life. Farmers use it for precision mapping and banks use it to record the precise time of transactions. It has found wide use in transportation, guided weapons, emergency response and disaster relief. Block III satellites, which will begin replacing older orbiting GPS satellites in 2014, offer a new, internationally agreed-upon civilian signal that other nations' navigation satellites will also use. That would allow civilian receivers to tap into Europe's budding Galileo navigation system and others. "So all of a sudden you've got 70, 80, 90 satellites up in orbit," compared with 30 operational satellites in the US system today, Gibbons said. "It's giving you a much greater number of satellites to be receiving." GPS receivers need signals from at least four satellites to establish their position, so having more satellites to tune into would improve accuracy. It also makes it easier for a receiver to find enough satellites. Military receivers could also use the international signal, as well as the other civilian signals and the encrypted, military-only signals the satellites transmit, according to the US Air Force. Block III will add to the number of satellites transmitting two other relatively new civilian signals. One will likely be used for such high-precision activities as surveying, Gibbons said. The Federal Aviation Administration's GPS-based NextGen air traffic control system, which is still under development, could benefit from at least one of the new signals. But the system could also work with the older, existing civil systems, said Hans Weber, president of TECOP International, an aviation technology management firm. It's not yet clear when enough satellites will be transmitting the international signal and the other new civilian signals to make them usable. It typically takes 18 satellites transmitting a signal to reach initial operation and 24 to reach full capability, Gibbons said. Block III will also widen the availability of two new, encrypted military-only signals already being transmitted from a few satellites. The US Air Force says they will have more power than older military signals, making them harder for enemies to jam and allowing them to penetrate deeper into urban canyons formed by skyscrapers, as well as through dense foliage. Nine of the 30 GPS satellites in operation transmit the new military signals, but the US Defence Department is still testing it before putting it into wide use. Gibbons said it could be 2018 or 2020 before the military can take full advantage of the military-only signals. The Air Force, which controls all the US GPS satellites from Schriever Air Force Base, Colorado, plans to buy and launch 32 of the new Block III satellites over several years at a cost of about $US5.5 billion, including upgraded ground control systems. The Congressional Budget Office, which issued a report on GPS in October, estimated the total costs much higher - $22 billion by 2025 - in part because it says the Air Force will need 40 satellites, not 32, to take advantage of all the capabilities planned for later GPS III models. The CBO suggested the Air Force could save up to $US3 billion by foregoing some of those later advancements and upgrading receivers instead. The Air Force responded that it's still studying the CBO report. Lockheed Martin was awarded a $US1.5 billion contract to build a non-flying prototype of the GPS III satellites and the first two flight versions, with options to build 10 more. The last component of the prototype arrived at Lockheed Martin's $US80 million GPS facility south of Denver last week. In a sparkling white clean room nearly as big as a football field, it will undergo final assembly and months of testing designed to find and correct any problems before they make it into any flying satellites. The prototype will also help find any bugs in the assembly and testing process, said Keoki Jackson, Lockheed Martin's program director for GPS III. "This (prototype) has allowed us to check out all of the designs, the interfaces, all the test equipment," Jackson said. "It allows us to find any issues long before they become any issues with flight hardware." The Air Force plans to eventually begin launching two GPS III satellites on the same rocket, Jackson said. A satellite launch typically costs about $US250 million, and doubling up will bring significant savings, he said. GPS III satellites are designed to operate for 15 years, compared to seven to 12 years for many military satellites, Jackson said. Associated Press http://news.theage.com.au/digital-life/cartech/next-wave-of-gps-promises-stronger-signals-20111219-1p14y.html
Date: Thu, 22 Dec 2011 11:19:49 -0500 From: Monty Solomon <firstname.lastname@example.org> To: email@example.com. Subject: Protect Yourself from Intrusive Laptop and Phone Searches at the U.S. Border Message-ID: <zkSYxB.A.f8G.SoA9OB@telecom> December 20, 2011 Protect Yourself from Intrusive Laptop and Phone Searches at the U.S. Border EFF's New Guide Helps Travelers Defend Their Data Privacy San Francisco - Anytime you travel internationally, you risk a broad, invasive search of your laptop, phone, and other digital devices - including the copying of your data and seizing of your property for an indefinite time. To help travelers protect themselves and their private information during the busy holiday travel period, the Electronic Frontier Foundation (EFF) released a new report today with important guidance for safeguarding your personal data at the U.S border. Thanks to protections enshrined in the U.S. Constitution, the government generally can't snoop through your laptop for no reason. But the federal government claims those privacy protections don't cover travelers at the U.S. border, allowing agents to take an electronic device, search through all the files, and keep it for further scrutiny - without any suspicion of wrongdoing whatsoever. For business travelers, that could expose sensitive information like trade secrets, doctor-patient and attorney-client communications, and research and business strategies. For others, the data at risk includes personal health histories, financial records, and private messages and photos of family and friends. EFF's new report, "Defending Privacy at the U.S. Border: A Guide for Travelers Carrying Digital Devices," outlines potential ways to protect that private information, including minimizing the data you carry with you and employing encryption. ... https://www.eff.org/press/releases/protect-yourself-intrusive-laptop-and-phone-searches-us-border For Defending Privacy at the U.S. Border: A Guide for Travelers Carrying Digital Devices: The EFF guide for travelers is at: https://www.eff.org/wp/defending-privacy-us-border-guide-travelers-carrying-digital-devices To take the border privacy quiz: https://www.eff.org/pages/border-search-quiz
TELECOM Digest is an electronic journal devoted mostly to telecom- munications topics. It is circulated anywhere there is email, in addition to Usenet, where it appears as the moderated newsgroup 'comp.dcom.telecom'. TELECOM Digest is a not-for-profit, mostly non-commercial educational service offered to the Internet by Bill Horne. All the contents of the Digest are compilation-copyrighted. You may reprint articles in some other media on an occasional basis, but please attribute my work and that of the original author. The Telecom Digest is moderated by Bill Horne.
43 Deerfield Road
Sharon MA 02067-2301
bill at horne dot net
This Digest is the oldest continuing e-journal about telecomm- unications on the Internet, having been founded in August, 1981 and published continuously since then. Our archives are available for your review/research. We believe we are the oldest e-zine/mailing list on the internet in any category! URL information: http://telecom-digest.org Copyright (C) 2011 TELECOM Digest. All rights reserved. Our attorney is Bill Levant, of Blue Bell, PA.
Finally, the Digest is funded by gifts from generous readers such as yourself who provide funding in amounts deemed appropriate. Your help is important and appreciated. A suggested donation of fifty dollars per year per reader is considered appropriate. See our address above. Please make at least a single donation to cover the cost of processing your name to the mailing list. All opinions expressed herein are deemed to be those of the author. Any organizations listed are for identification purposes only and messages should not be considered any official expression by the organization.