Не съм много добре запознат, но мисля че GPS спътниците представляват свръх-точни радио-часовници на средна земна орбита - (MEO) 20 200 км. Обикалят земята по два пъти на ден със скорост от 3.9 км/сек. Орбитите им са въведени в GPS устройствата и по сигнала от три спътника, чрез триангулация, GPS-а определя положението си - географска дължина/ширина/надморска височина. GPS има и военно предназначение - навигация, проследяване на цели, насочване на управляеми ракети, бомби, снаряди и т.н. По време на война САЩ изключва гражданската GPS навигация за засегнатият географски район и на тази територия са активни само криптираните военни честоти. ГЛОНАСС и бъдещата китайска система си имат определено военно предназначение.
Мисля, че европейската навигационна система ще има и търговски характер.
GPS, ГЛОНАСС, Galileo и COMPASS
Re: GPS, ГЛОНАСС, Galileo и COMPASS
Глонас също ще има търговско предназначение.По предложение на Владимир Путин от 2012 автомбилите в русия ще бъдат снабдени с глонас
Re: GPS, ГЛОНАСС, Galileo и COMPASS
[Quote]...от 2012 автомбилите в русия ще бъдат снабдени с глонас [/Quote]
Ako успеят да я пуснат дотогава. Надеждността на руските спътници е изключително ниска и животът им е кратък. В момента са активирани всичките 21 спътника, а за нормална работа са необходими още поне два или три.
http://rnd.cnews.ru/tech/news/line/index_science.shtml?2010/06/17/396228
Нови спътници се очаква да бъдат изведени през септември месец.
http://rnd.cnews.ru/tech/news/line/index_science.shtml?2010/07/21/401941
П.П Връзките са на руски.
Ako успеят да я пуснат дотогава. Надеждността на руските спътници е изключително ниска и животът им е кратък. В момента са активирани всичките 21 спътника, а за нормална работа са необходими още поне два или три.
http://rnd.cnews.ru/tech/news/line/index_science.shtml?2010/06/17/396228
Нови спътници се очаква да бъдат изведени през септември месец.
http://rnd.cnews.ru/tech/news/line/index_science.shtml?2010/07/21/401941
П.П Връзките са на руски.
-
Atlantique
- Мнения: 332
- Регистриран: 06 фев 2010, 22:33
Re: GPS, ГЛОНАСС, Galileo и COMPASS
Ето последно развитие по въпроса. ГЛОНАСС явно ще се забави...
http://www.bbc.co.uk/news/world-europe-11922496
www.bbc.co.uk/news/world-europe-11922496
5 December 2010 Last updated at 15:16 GMT
[B]Russian satellites fail to enter orbit after launch [/B]
Three Russian satellites have failed to enter orbit after they were launched on a rocket from the Baikonur cosmodrome in Kazakhstan.
Russian aerospace experts said the satellites and the upper stage rocket carrying them probably fell into the Pacific Ocean near Hawaii.
Officials said the satellites went off course after separating with a booster rocket from the main launch rocket.
The satellites were to be part of a navigation system meant to rival GPS.
They were being carried on a Proton-M rocket launched earlier on Sunday.
A source in Russia's aerospace industry told Ria-Novosti news agency that the rocket had veered off course by eight degrees after its launch.
Russia has already successfully launched a number of the Glonass satellites this year. The navigation system is meant to be in place next
http://www.defensenews.com/story.php?i=5169393
www.defensenews.com/story.php?i=5169393
http://www.bbc.co.uk/news/world-europe-11922496
www.bbc.co.uk/news/world-europe-11922496
5 December 2010 Last updated at 15:16 GMT
[B]Russian satellites fail to enter orbit after launch [/B]
Three Russian satellites have failed to enter orbit after they were launched on a rocket from the Baikonur cosmodrome in Kazakhstan.
Russian aerospace experts said the satellites and the upper stage rocket carrying them probably fell into the Pacific Ocean near Hawaii.
Officials said the satellites went off course after separating with a booster rocket from the main launch rocket.
The satellites were to be part of a navigation system meant to rival GPS.
They were being carried on a Proton-M rocket launched earlier on Sunday.
A source in Russia's aerospace industry told Ria-Novosti news agency that the rocket had veered off course by eight degrees after its launch.
Russia has already successfully launched a number of the Glonass satellites this year. The navigation system is meant to be in place next
http://www.defensenews.com/story.php?i=5169393
www.defensenews.com/story.php?i=5169393
-
Atlantique
- Мнения: 332
- Регистриран: 06 фев 2010, 22:33
Re: GPS, ГЛОНАСС, Galileo и COMPASS
http://www.bbc.co.uk/news/science-environment-14886082
www.bbc.co.uk/news/science-environment-14886082
[Quote]The new European constellation is expected to deepen and extend those markets as sat-nav functionality becomes ubiquitous in consumer devices such as mobile phones.[/Quote]
[B]Europe's Galileo sat-nav spacecraft ready to fly[/B]
By Jonathan Amos
Science correspondent, BBC News, Paris
[u]Europe's first two Galileo satellite-navigation spacecraft are ready for launch.[/u]
The platforms passed a key technical review at the weekend, paving the way for their flight to orbit on a Russian Soyuz rocket on 20 October.
One satellite has already made the journey to the launch complex in French Guiana; the second will ship this week.
The European Commission is investing billions of euros in its own version of the American GPS system.
It expects Galileo to bring significant returns to the 27-nation bloc's economies in the form of new businesses that can exploit precise timing and location data delivered from space.
The first two satellites are pathfinders for the system as a whole. Together with another pair of spacecraft to be lofted next year, they will validate the entire Galileo system, proving that it works as designed. Consumers should begin using Galileo alongside GPS in 2015.
On Saturday, the EC's technical agent, the European Space Agency (Esa), formally took delivery of the first satellites from industry in the shape of a paper exercise known as a qualification acceptance review.
"Qualification means the satellites have successfully passed all tests and are considered ready to fly and support the intended mission in orbit over the 12-year lifetime," Esa's Galileo project manager Javier Benedicto told BBC News.
Both satellites are being transferred to the brand new Sinamary spaceport in French Guiana, the new home for commercial Soyuz launches.
This facility is just north of the Kourou base traditionally used by Europe's workhorse launcher, the Ariane 5.
In the coming weeks, the Galileo pair will undergo final checks, which will see their flight software loaded and their propulsion sub-systems being fuelled. The last task will be to mate the duo to their Soyuz ST-B rocket. The launcher will put the satellies in a medium-altitude orbit some 23,000km above the planet.
The In-Orbit Validation (IOV) spacecraft have been built by a consortium, including Europe's two heavyweight space companies - Astrium and Thales Alenia Space.
Astrium's role, at its UK centre in Portsmouth, was to integrate all the payload components, including hydrogen-maser atomic clocks, the ultra-precise time-pieces on which Galileo's performance depends.
Astrium satellites CEO Evert Dudok told BBC News: "With the qualification acceptance review done, it means the satellites are now in Esa's hands - although of course we will be supporting the launch preparation.
"This, if you like, finishes the development programme of Galileo; and with the launch next year of the third and fourth satellites, the in-orbit verification will start.
"With these satellites, Europe masters navigation technologies, at least to the level of the US - and since Galileo has a more modern signal structure, I personally think we are a little bit ahead of the US."
Galileo should have been operational by now but the project has run into myriad technical, commercial and political obstacles, including early objections from the US, who thought a rival system to GPS might be used to attack its armed forces.
The venture came very close to being abandoned in 2007 when the public-private partnership put in place to build and run the project collapsed.
To keep Galileo alive, EU member-states had to agree to fund the entire project from the public purse. What should have cost European taxpayers no more than 1.8bn euros will now probably cost them in excess of 5bn euros.
The EU's continued commitment to the project despite severe budgetary and management failings is based on the belief that huge returns to the European economy will accrue from the investment.
Already, GPS is said to have spawned global markets that are worth several tens of billions of euros annually.
The new European constellation is expected to deepen and extend those markets as sat-nav functionality becomes ubiquitous in consumer devices such as mobile phones.
.
www.bbc.co.uk/news/science-environment-14886082
[Quote]The new European constellation is expected to deepen and extend those markets as sat-nav functionality becomes ubiquitous in consumer devices such as mobile phones.[/Quote]
[B]Europe's Galileo sat-nav spacecraft ready to fly[/B]
By Jonathan Amos
Science correspondent, BBC News, Paris
[u]Europe's first two Galileo satellite-navigation spacecraft are ready for launch.[/u]
The platforms passed a key technical review at the weekend, paving the way for their flight to orbit on a Russian Soyuz rocket on 20 October.
One satellite has already made the journey to the launch complex in French Guiana; the second will ship this week.
The European Commission is investing billions of euros in its own version of the American GPS system.
It expects Galileo to bring significant returns to the 27-nation bloc's economies in the form of new businesses that can exploit precise timing and location data delivered from space.
The first two satellites are pathfinders for the system as a whole. Together with another pair of spacecraft to be lofted next year, they will validate the entire Galileo system, proving that it works as designed. Consumers should begin using Galileo alongside GPS in 2015.
On Saturday, the EC's technical agent, the European Space Agency (Esa), formally took delivery of the first satellites from industry in the shape of a paper exercise known as a qualification acceptance review.
"Qualification means the satellites have successfully passed all tests and are considered ready to fly and support the intended mission in orbit over the 12-year lifetime," Esa's Galileo project manager Javier Benedicto told BBC News.
Both satellites are being transferred to the brand new Sinamary spaceport in French Guiana, the new home for commercial Soyuz launches.
This facility is just north of the Kourou base traditionally used by Europe's workhorse launcher, the Ariane 5.
In the coming weeks, the Galileo pair will undergo final checks, which will see their flight software loaded and their propulsion sub-systems being fuelled. The last task will be to mate the duo to their Soyuz ST-B rocket. The launcher will put the satellies in a medium-altitude orbit some 23,000km above the planet.
The In-Orbit Validation (IOV) spacecraft have been built by a consortium, including Europe's two heavyweight space companies - Astrium and Thales Alenia Space.
Astrium's role, at its UK centre in Portsmouth, was to integrate all the payload components, including hydrogen-maser atomic clocks, the ultra-precise time-pieces on which Galileo's performance depends.
Astrium satellites CEO Evert Dudok told BBC News: "With the qualification acceptance review done, it means the satellites are now in Esa's hands - although of course we will be supporting the launch preparation.
"This, if you like, finishes the development programme of Galileo; and with the launch next year of the third and fourth satellites, the in-orbit verification will start.
"With these satellites, Europe masters navigation technologies, at least to the level of the US - and since Galileo has a more modern signal structure, I personally think we are a little bit ahead of the US."
Galileo should have been operational by now but the project has run into myriad technical, commercial and political obstacles, including early objections from the US, who thought a rival system to GPS might be used to attack its armed forces.
The venture came very close to being abandoned in 2007 when the public-private partnership put in place to build and run the project collapsed.
To keep Galileo alive, EU member-states had to agree to fund the entire project from the public purse. What should have cost European taxpayers no more than 1.8bn euros will now probably cost them in excess of 5bn euros.
The EU's continued commitment to the project despite severe budgetary and management failings is based on the belief that huge returns to the European economy will accrue from the investment.
Already, GPS is said to have spawned global markets that are worth several tens of billions of euros annually.
The new European constellation is expected to deepen and extend those markets as sat-nav functionality becomes ubiquitous in consumer devices such as mobile phones.
.
Re: GPS, ГЛОНАСС, Galileo и COMPASS
Мисля, че 4-5 спътника ще са напълно достатъчни за Европа, но нали системата трябва да е глобална. (woo) . Някои геодезични прибори ползват всички налични сателити, но потребителската електроника не е така - трябва цялата система да е вкарана в действие и тогава почват да мислят за евентуалната и поддръжка.
Re: GPS, ГЛОНАСС, Galileo и COMPASS
Настоящите телефони с GPS приемник ще могат ли да ползват Galileo и ГЛОНАСС ?
Re: GPS, ГЛОНАСС, Galileo и COMPASS
Не. В бъдеще със сигурност един чип ще обслужва всичките, ако руснаците позволят.
Re: GPS, ГЛОНАСС, Galileo и COMPASS
Не. В бъдеще със сигурност един чип ще обслужва всичките, ако руснаците позволят.
-
Atlantique
- Мнения: 332
- Регистриран: 06 фев 2010, 22:33
Re: GPS, ГЛОНАСС, Galileo и COMPASS
Докато умните се наумуват, Китай май вече ни изпревари...
:)
Сега да очакваме мобилни телефони [B]ZTE[/B] и [B]Huawei[/B], снабдени с навигация [B]BeiDou 2[/B]. ;)
http://www.bbc.co.uk/news/world-asia-pacific-15089720
www.bbc.co.uk/news/world-asia-pacific-15089720
[Quote][B]Satellites and Launchers[/B]
-- China is now launching satellites more frequently than the US
-- It is rapidly completing the BeiDou 2 satellite system, to provide high-accuracy positioning services for users in China
-- Complete BeiDou 2 constellation will be made up of 35 satellites with five in geostationary orbit
-- China has launched 11 remote-sensing satellites (eg gathering visual data from space) since 2006
-- It has a family of highly reliable Long March launchers and three operational launch sites
-- In 2007 a ballistic missile launched from a mobile launcher intercepted and destroyed an ageing Chinese weather satellite[/Quote]
:)
Сега да очакваме мобилни телефони [B]ZTE[/B] и [B]Huawei[/B], снабдени с навигация [B]BeiDou 2[/B]. ;)
http://www.bbc.co.uk/news/world-asia-pacific-15089720
www.bbc.co.uk/news/world-asia-pacific-15089720
[Quote][B]Satellites and Launchers[/B]
-- China is now launching satellites more frequently than the US
-- It is rapidly completing the BeiDou 2 satellite system, to provide high-accuracy positioning services for users in China
-- Complete BeiDou 2 constellation will be made up of 35 satellites with five in geostationary orbit
-- China has launched 11 remote-sensing satellites (eg gathering visual data from space) since 2006
-- It has a family of highly reliable Long March launchers and three operational launch sites
-- In 2007 a ballistic missile launched from a mobile launcher intercepted and destroyed an ageing Chinese weather satellite[/Quote]
