ABOUT KEDAH HISTORY

Recorded history shows that in the 5th century AD, traders plying the east-west trade route stopped at the port of Kuala Muda, using Gunung Jerai, Kedah's highest peak, as a navigational point.

The ruins of ancient Candi (temples) in the Bujang Valley show that a Hindu-Buddhist civilization existed here and may have been one of the first places to have come into contact with Indian traders. How important this kingdom was, is still being researched as more artifacts are unearthed.

During the 7th and 8th centuries, Kedah paid tribute to the Sumatran Srivijaya Empire. After the decline of the empire, it became a vassal state to the Thais until the 15th Century when the rise of Malacca led to the Islamization of the area. Kedah faced Portuguese and Achehnese attacks in the 17th century, but it again fell into Thai hands in 1821.

The Thais handed Kedah over to the British in 1909, and after the Japanese occupation, it became one of the states of the Malayan Union and subsequently the Federation of Malaya in 1948.

All My Friends

SEE AND HEAR MORSE CODE

Sunday, March 7, 2010

NASA Ground-Breaking Unearths New Generation of Deep Space Network Antennas

NASA's Deep Space Network in Canberra, Australia. Image credit: NASA/JPL/CDSCC › Larger image (11 Mb)

NASA officials break ground on new antennas at the Canberra Deep Space Communication Complex in Australia, part of NASA's Deep Space Network. Image credit: NASA/JPL/CDSCC › Larger image (7 Mb)

PASADENA, Calif. -- NASA officials broke ground near Canberra, Australia on Wednesday, Feb. 24, beginning a new antenna-building campaign to improve Deep Space Network communications.
Following the recommendations of an independent study, NASA embarked on an ambitious project to replace its aging fleet of 70-meter-wide (230-foot-wide) dishes with a new generation of 34-meter (112-foot) antennas by 2025.
The three 70-meter antennas, located at the NASA Deep Space Network complexes at Goldstone, Calif., Madrid, Spain, and Canberra, are more than 40 years old and show wear and tear from constant use.
The new antennas, known as "beam wave guide" antennas, can be used more flexibly, allowing the network to operate on several different frequency bands within the same antenna. Their electronic equipment is more accessible, making maintenance easier and less costly. The new antennas also can receive higher-frequency, wider-bandwidth signals known as the "Ka band." This band, required for new NASA missions approved after 2009, allows the newer antennas to carry more data than the older ones.
In the first phase of the project near Canberra, NASA expects to complete the building of up to three 34-meter antennas by 2018. The decision to begin construction came on the 50th anniversary of U.S. and Australian cooperation in space tracking operations.
"There is no better way to celebrate our 50 years of collaboration and partnership in exploring the heavens with the government of Australia than our renewed commitment and investment in new capabilities required for the next five decades," said Badri Younes, deputy associate administrator for Space Communications and Navigation at NASA Headquarters in Washington.
Space Communications and Navigation is responsible for managing all NASA space communications and navigation resources and their operations. NASA's Jet Propulsion Laboratory manages the agency's Deep Space Network, an important component of the agency's space communications resources.
NASA's goal is to integrate all NASA communications resources into a unified, far more capable network. Australia's Commonwealth Scientific and Industrial Research Organization manages the communication complex near Canberra for NASA.
A number of NASA officials were on hand. They are, left to right (in the second image): Miguel Marina, JPL's 34-meter implementation manager, Peter Vrotsos, director of network Services at NASA Headquarters, Badri Younes, deputy associate administrator for space communications and navigation at NASA Headquarters, Megan Clark, CEO of the Australian Commonwealth Scientific and Industrial Research Organization (CSIRO), Alex Zelinsky, group executive for information services at CSIRO, Miriam Baltuck, director of the Canberra Deep Space Communications Complex, US Ambassador Jeffrey Bleich, William Gerstenmaier, associate administrator for space operations at NASA Headquarters, Charles Elachi, director of JPL. The new antennas will improve communications with spacecraft traveling the reaches of deep space and are part of an eventual plan to replace the network's 40-year-old workhorse 70-meter-wide (230-foot-wide) antennas. The first phase will take place at the complex near Canberra. The Deep Space Network is managed by NASA's Jet Propulsion Laboratory in Pasadena, Calif.
The California Institute of Technology in Pasadena manages JPL for NASA.
More information about the Deep Space Network is online at: http://deepspace.jpl.nasa.gov/. More information about NASA's Space Communication and Navigation Program is at: https://www.spacecomm.nasa.gov/spacecomm/.

Jia-Rui C. Cook 818-354-0850Jet Propulsion Laboratory, Pasadena, Calif.jia-rui.c.cook@jpl.nasa.govKatherine Trinidad 202-358-1100Headquarters, Washingtonkatherine.trinidad@nasa.gov

0 comments:

MyEQSLCard

MyEQSLCard

eQSL Card (Recieved)

eQSL Card (Recieved)

igq107 QSL Card

igq107 QSL Card

THE POSTCARD CROSSING PROJECT

THE POSTCARD CROSSING PROJECT
“send a postcard and receive a postcard back from a random person somewhere in the world!”

ABOUT AMATEUR RADIO

Amateur radio service is defined in the Communication and Multimedia (Spectrum) Regulations 2000 as a radiocommunications service (covering both terrestrial and satellite) in which a station is used for the purpose of self traning, intercommunication and technical investigations carried out by authorized persons who are interested in radio technique solely with a personal aim and without any pecuniary interest.

AMATEUR RADIO OPERATOR'S CERTIFICATE

Regulation 27(1) of the Communications and Multimedia (Technical Standards) Regulations 2000 states that no person shall undertake or conduct any activity in designated skil area unless that person is certified. Amateur radio operator has been gazetted as a designated skill area category under the regulation, hence to operate an amateur radio station a person needs to have an appropriate proficiency and skill i.e. certified in this area.

INTERFERENCE

Please ensure that the radio transmision does not cause interference to any other radio services. Regulation 15(1) of the Communications and Multemedia (Technical Standards) Regulations 2000 states that no person shall intentionally design, install, operate, maintain or modify any communications equipment in a manner is likely to cause interference with, impairment, mulfunction of, or harm to any communications equipment or any other equipment.

Regulation 15(2) of the regulation denotes that a person who contravenes this regulation commits an offence and shall, on conviction, be liable to a fine not exceeding three hundred thousand ringgit (RM 300,000.00) or to imprisonment for a term of not exceeding three years or to both.

To eliminate the potential of interferences, the following procedures must be followed strictly:-

a) Ensure that suffient equipment, tools and test gear is available and can used to monitor and verify that your transmission does not cause any interference to other radio services.

b) You must responsible if your amateur radio is found to be the caused of interference. Immediate remedy action must be taken to rectify the problems in case of interference.

c) Ensure that the transmission do not exceed the level of over deviation.

d) Ensure that the radiated energy is always within the narrowest posible frequency bands for any class of emission in use.

e) The radiation of harmonics and spurious emissions should be suppressed to minimize interference.

Historical Description of Amateur Radio: From the Encyclopedia Britannica:-

Interest in amateur radio arose around the turn of the century, shortly after the Italian inventor Guglielmo Marconi successfully sent the first transatlantic wireless signal in 1901. The interference of amateur broadcasts with commercial and military transmissions led to the institution of government control in 1911. After World War I, amateurs became active in radio experimentation, contributing to developments in long-distance broadcasting and becoming the first radio operators successfully to exploit the upper medium-frequency and lower high-frequency radio bands. Over the years, amateur radio operators have also provided emergency communications during forest fires, floods, hurricanes, and other disasters. They serve as an important link between stricken communities and the outside world until normal communications are reestablished.Amateur radio operators in the United States are subject to international and federal regulations. There are five classes of licenses. Competence in the use of the International Morse Code and a knowledge of radio theory and regulation are required to obtain the advanced-level licenses. Amateur radio is allocated frequencies at the extreme high-frequency end of the medium-wave band, five groups of frequencies in the shortwave band, two groups in the veryhigh-frequency band, three in the ultrahigh-frequency band, and seven in the superhigh-frequency band for telegraphic and telephonic communication using amplitude and frequency modulation. There are restrictions on the power of the transmitters, and certain of the frequencies must be shared with due regard for the needs of other users.
There was an error in this gadget
Loading...

MyBlogLog

DIY Printed circuit board

How To Make A PCB

ROGER BEEP ISD1420

ROGER BEEP

ROGER BEEP ALL RADIO

FOX TX with MP3 PLAYER Function as CWID'er (YC5NBX)