Visualizzazione post con etichetta glonass. Mostra tutti i post
Visualizzazione post con etichetta glonass. Mostra tutti i post

26 febbraio 2011

GLONASS, a lancio la navigazione sat made in Russia

Dopo lo sfortunato lancio del dicembre scorso, con il vettore inabissatosi nel Pacifico, il programma spaziale russo ha perfezionato il lancio di uno degli ultimi satelliti della costellazione GLONASS, il sistema di navigazione alternativo al GPS che opererà in analoghi segmenti della banda satellitare L. La costellazione è arrivata a 22 satelliti su 24 (più 2 o 3 di riserva). Contemporaneamente il mercato prepara il lancio dei dispositivi compatibili con il nuovo sistema di geoposizionamento. I cinesi delal ZTE forniranno infatti ad aprile un nuovo smartphone abilitato al GLONASS, che con il suo prezzo di circa 320 dollari, un terzo rispetto al prezzo dell'iPhone in Russia, punta a un grosso successo commerciale. La Russia vuole fare sempre più da sola nell'ambito dei servizi digitali, tanto è vero che in sede europea è stata anche fatta la proposta di un nuovo standard di radio digitale, il RAVIS, con cui i russi vogliono studiare la possibilità di digitalizzazione della banda FM.

Russia launches Glonass-K satellite

The Russian Space Forces have successfully launched a new Glonass-K navigation satellite from the Plesetsk space center, a Defense Ministry spokesman said Saturday.
The previous launch under the Glonass project in December 2010, supposed to conclude the forming of the satellite grouping, was unsuccessful as the rocket veered off course and sunk in the Pacific Ocean. The loss cost Russia 2.5 billion rubles ($86 million) in direct damages.
The Glonass satellite network is Russia's answer to the U.S. Global Positioning System, or GPS, and is designed for both military and civilian uses. Both systems allow users to determine their positions to within a few meters.
The Glonass-K, which has a service life of 10 years, will beam five navigation signals - four in the special L1 and L2 bands and one for civilian applications in the L3 band.
The complete grouping must have 24 operational and 2-3 reserve satellites for the Glonass network to operate with global coverage.
Russia currently has 22 Glonass satellites in orbit and will launch another three Glonass-M satellites on board a Proton heavy carrier rocket later this year to complete the Glonass grouping.

Glonass Smartphones Coming in April
21.02.2011

Mobile TeleSystems will begin selling its new Glonass-compatible smartphones in April, a month later than initially announced, and though it is technically less advanced than the iPhone, experts say, the new handset could easily outsell it in Russia.
The MTS Glonass 945, which AFK Sistema main owner Vladimir Yevtushenkov compared to the iPhone earlier this year, will sell for 11,000 rubles ($376) and will be the first smartphone to operate with the Russian navigation system, MTS spokeswoman Irina Osadchaya told The Moscow Times.
The new phone will be produced by ZTE, a major Chinese telecommunications equipment manufacturer, but the price for it may still be adjusted, the spokeswoman said.
When presented with the prototype of the phone late last year, Prime Minister Vladimir Putin joked that it would be good to have the phone ready by International Women's Day, so that Russian women, whom the holiday is supposed to celebrate, could find out where their husbands are.
"From the technical point of view, this smartphone is worse than the iPhone," said Vladimir Karpenko of J'Son & Partners. "The number of iPhones sold in Russia is quite small."
With the iPhone currently selling at 34,900 rubles, it constitute less than 1 percent of the market and will be easy to outsell, especially when the average cost of a cellular phone purchased by Russians is estimated at 4,100 rubles ($140) and smartphones at $320 to $330, Karpenko said.
Experts also point out that selling the new Glonass-compatible phone will require a substantial marketing effort, because the phone's main advantage is supposed to be its navigation system.
"People buy phones not for the sake of their navigation system," said Anna Lepetukhina, telecommunications analyst at Troika Dialog. "The phone is a bit too expensive if you just want to toy with the navigation system."
The Russian government has been cheerleading for Glonass and Yevtushenkov despite a carrier rocket with three Glonass-M satellites sinking in the Pacific Ocean on Dec. 5.
The government is now looking into introducing a 25 percent fee on GPS-only compatible equipment, and the Transportation Ministry has already drafted a bill to fine legal entities that own certain types of cars unequipped with Glonass up to 50,000 rubles.

02 febbraio 2011

Ricezione GPS/Galileo, l'evoluzione del silicio

Da EETimes ecco un paio di notizie che ci parlano dell'ultima generazione di chip per la ricezione dei satelliti GPS e di altre costellazioni satellitari, tra cui un nuovo prodotto STMicro compatibile con GPS, Galileo, Glonass e con la nuovissima costellazione giapponese QZSS. Dopo i car navigator e i telefonini le funzioni di geoposizionamento presto verranno integrate in una tipologia sempre più vasta di dispositivi fissi e mobili.
Single-chip receiver works with multiple satellite navigation systems

STMicroelectronics has introduced Teseo II single-chip stand-alone positioning receivers for in-car navigation, telematics, and portable navigation applications. These systems-on-chips are claimed to be the industry’s first monolithic devices capable of receiving signals from multiple satellite navigation systems, including GPS, Galileo, Glonass and QZSS*. The Teseo II family looks to combine high positioning accuracy and indoor sensitivity with processing capabilities and design flexibility.
The devices ability to acquire the position, velocity, and time data from all major global navigation systems greatly improves position accuracy and navigation in poor satellite visibility conditions, such as in urban canyons. Using ST’s Self-Trained Assisted GPS technology, which improves the startup performance of a positioning device in difficult signal conditions, gives the Teseo II chips short signal-acquisition times (Time To First Fix).
Samples of ST’s Teseo II receivers (STA8088EX) (data sheets here) are available and volume production is scheduled for Q3 2011. Unit pricing of the STA8088EX is less than $6 for volumes in the range of 500,000 pieces.

*Galileo is the European global navigation satellite system, currently scheduled to become fully operational in 2013-2014. Glonass (Global Navigation Satellite System) is the Russian alternative and complement to GPS covering 100% of Russia and soon planned to provide continuous global coverage. QZSS (Quasi-Zenith Satellite System) is a Japanese enhancement for GPS. Its first satellite was launched in 2010.

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SkyTraq achieves low power in high-performance satellite receiver

SkyTraq has introduced S4554GNS-LP, a high-performance low-power GLONASS/GPS receiver. The company reports that the new device achieves best in class perofmrance:

29 second cold start TTFF
-159dBm navigation sensitivity
-145dBm cold starting sensitivity
250mW power consumption

The S4554GNS-LP can operate in 12 tracking channel GPS-only mode, 12 tracking channel GLONASS-only mode, and 24 tracking channel GLONASS + GPS mode. It performs 10 million time-frequency hypothesis testing per second. It features a 45mm x 54mm form factor, with MCX connector and 20-pin header for easy plug-and-play usage. The operating temperature range is -40 ~ +85degC.
Volume delivery to customer begins in latter half of February 2011. Evaluation kits avaialable now.
More Information: