http://big5.xinhuanet.com/gate/big5/news.xinhuanet.com/mil/2009-04/11/content_11167907.htm
俄羅斯國防部將在2009年發射新的偵察衛星
2009年04月11日 10:45:55 來源:科技日報
俄羅斯國防部將在2009年發射新的偵察衛星,俄羅斯國防部主管裝備的副部長弗拉季米爾·巴波夫金在周五對媒體作上述表示。
弗拉季米爾·巴波夫金稱,“我們應在今年發射新的偵察衛星,新偵查衛星是全新的科研成果”。但巴波夫金並沒有具體透露新偵察衛星的新穎之處。
巴波夫金同時表示,俄國防部年內還將發射兩顆新的通訊衛星。此外,俄羅斯防導彈預警係統衛星也將不晚于2011年末或2012年初面世。 (張浩)
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俄表示導航衛星準時發射 不因經濟危機延後
2009年04月11日 11:21:38 來源:環球時報
“格洛納斯”係統的最後衛星發射將會于2010年底準時進行,不會因俄羅斯發生經濟危機而延後。這是負責發射工作的俄“通信衛星係統”企業在“太空--選擇-通信”的展覽會上做出的明確表示。
俄新社4月9日報道,“通信衛星係統”企業總裁傑斯陀耶朵夫說:“經濟危機不會影響最新改良型‘ГЛОНАСС-К’的發射。所需資金已全部到位。”3月初,“格洛納斯”係統已有20顆衛星進行工作,幾乎覆蓋俄羅斯全境,歐洲部分可以保證99%有信號。地表的其它部分兼容通過率不低于80%。地表衛星導航實際上共有24顆衛星提供服務。(梁小逸)
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GLONASS financing not to change -- Roskosmos
06.04.2009, 22.01
ST. PETERSBURG, April 6 (Itar-Tass) -- The financial parameters of the federal GLONASS programme up to 2011 will not change, a Federal Space Agency (Roskosmos) official said.
Six GLONASS-M satellites are launched and put into orbit every year for the normal operation of the system, Reshetnev Information Satellite Systems first deputy chief designer Viktor Kosenko said at the 3rd All-Russia Conference “Fundamental and Applied Coordinate, Time and Navigation Support” (KVNO-2009) in St. Petersburg on Monday.
Nineteen GLONASS-M satellites and one GLONASS satellite have been operating in orbit since March 8, 2009. “All 20 satellites are operating normally,” he said.
At the second stage, the number of satellites will be increased to 24 in 2010. The system will be developed using innovative GLONASS-K satellites, Kosenko said.
For GLONASS signals to be received continuously across Russia, the system needs at least 18 operating satellites, and 24 satellites for global coverage.
The Global Navigation Satellite System (GLONASS) is based on a constellation of active satellites which continuously transmit coded signals in two frequency bands, which can be received by users anywhere on the Earth's surface to identify their position and velocity in real time based on ranging measurements. The system is a counterpart to the United States Global Positioning System (GPS) and both systems share the same principles in the data transmission and positioning methods.
The development of the GLONASS began in 1976, with a goal of global coverage by 1991. The system was completed 1995 but then rapidly fell into decay after the collapse of the Soviet economy. In 2001, Russia decided to restore the system and has diversified and accelerated the programme aiming at global coverage by 2009.
GLONASS was developed to provide real-time positioning and velocity estimation, initially for use by the Soviet military.
The fully operational GLONASS system consists of 24 satellites.
GLONASS is a Russian version of the U.S. Global Positioning System (GPS), which is designed for both military and civilian use, and allows users to identify their positions in real time. The system can also be used in geological prospecting.
GLONASS is managed for the Russian Federation Government by the Russian Space Forces and the system is operated by the Coordination Scientific Information Center (KNITs) of the Defence Ministry.
The operational space segment of GLONASS consists of 21 satellites in 3 orbital planes, with 3 on-orbit spares. The three orbital planes are separated 120 degrees, and the satellites within the same orbit plane by 45 degrees. Each satellite operates in circular 19,100 km orbits at an inclination angle of 64.8 degrees and each satellite completes an orbit in approximately 11 hours 15 minutes.
The ground control segment of GLONASS is entirely located within the former Soviet Union territory. The Ground Control Center and Time Standards is located in Moscow and the telemetry and tracking stations are in St. Petersburg, Ternopol, Yeniseisk, and Komsomolsk-na-Amure.
The first GLONASS satellites were launched into orbit in 1982. Two Etalon geodetic satellites were also flown in the 19,100 km GLONASS orbit to fully characterise the gravitational field at the planned altitude and inclination. The original plans called for a complete operational system by 1991, but the deployment of the full constellation of satellites was not completed until late 1995 and early 1996. GLONASS was officially declared operational on September 24, 1993 by a decree of the President of the Russian Federation.
The Russian military identified, in the late 1960s a need for a Satellite Radio Navigation System (SRNS) for use in precision guidance of new generation of ballistic missiles in planning. The existing Tsiklon satellite navigation system required several minutes of observation by the receiving station to fix a position making them unusable for navigation positioning purposes. In 1968 to 1969 research institutes of the Ministry of Defence, Academy of Sciences, and Soviet Navy joined together to establish a single solution for air, land, sea, and space forces. This resulted in a 1970 requirements document that established the requirements for such a system. After further basic research in 1976 a decree was issued by the Soviet Union establishing the Global'naya Navigatsionnaya Sputnikovaya Sistema (GLONASS, Global Navigation Satellite System).
The constellation is currently operating in a degraded mode with only eight satellites fully operationall. A program for the gradual enhancement of the GLONASS constellation is being developed. That plan called for 12 functioning satellites in 2001.
Work is underway to modernise the system. The new GLONASS-M satellites have better signal characteristics as well as a longer design life (7-8 years instead of the current 3 years). In the future, the system should use low mass third generation GLONASS-K satellites with a guaranteed lifespan of 10 years.
In January 2008, with 13 operational satellites, GLONASS availability (the amount of the day when a position can be calculated) in Russia was 66.2 percent and average availability worldwide was at 56.0 percent.
GLONASS chief designer Yuri Urilich said earlier that Russian specialists had made considerable progress in improving the GLONASS system using new technologies.
"We have solved one of the most crucial tasks - upgrading the system," he said.