India launched Remote sensing Radar Imaging Satellite(RISAT 1) successfully

[Maulik]

RISAT-1 (short for Radar Imaging Satellite - 1) is the first of the RISAT series of Indian remote sensing satellites built by the Indian Space Research Organisation (ISRO). It uses a C-band Synthetic Aperture Radar (SAR) for all-weather earth observation.
According to ISRO officials, RISAT-1 at 1,850 kilograms (4,100 lb) is the heaviest microwave satellite to be built by India. While the RISAT-1 was the first satellite of the RISAT series to be built, it will be the second to be launched.[2] RISAT-1 is in queue for launch by ISRO's PSLV-XL rocket in April 2012.
Previous Indian remote sensing satellites relied mainly on optical and infrared sensors. RISAT-1 uses an indigenously developed C-band SAR, operating in multi-polarisation, multi-resolution modes.[2]
The fabrication and launch of RISAT-1 was postponed in the aftermath of the 2008 Mumbai attacks in order to prioritize the launch of RISAT-2 with its X-band SAR of Israeli origin.[3][4][5]
The features of RISAT include:
160 x 4 Mbps data handling system
50 Newton-meter-second reaction wheels
SAR antenna deployment mechanism
Phased array antenna with dual polarisation
RISAT-1 has a resolution of 3m-50m. It also supports a spotlight mode for prolonged focus on a given geographical area at a resolution of 1m.[1] Most of the design and the installation of basic instrument subsystems for the satellite was done in 2010.

20th consecutive successful flight of PSLV..

[Maulik]

Top 10 facts about RISAT-1, India's own 'spy satellite'

New Delhi: After a highly successful launch of the Agni V, India today successfully launched its own 'spy satellite' RISAT-1. It was powered by the Polar Satellite Launch Vehicle (PSLV) from Sriharikota at 5.47 am this morning. Here are the top 10 facts on RISAT-1:

1. Weighing at 1528 Kg, RISAT-1 is the heaviest satellite ever launched by India.

2. It will be powered by a 321 tonnes rocket, the most powerful Polar Satellite Launch Vehicle (PSLV).

3. This is the third time that ISRO is using a PSLV-XL (Extra Large) rocket. It was first used in October 2008 to put Chandrayaan-1 in orbit and again in July 2011 during the communication satellite GSAT-12 launch.

4. The indigenously made satellite has day and night viewing capacity and will not be blinded by cloud cover.

5. RISAT-1 will help in crop monitoring and flood forecasting. It will give India the ability for continuous surveillance.

6. The satellite carries a C-band Synthetic Aperture Radar (SAR) payload, operating in a multi-polarisation and multi-resolution mode to provide images with coarse, fine and high spatial resolutions. It has a best resolution of up to 1 m

7. It has taken ISRO 10 years to make this sophisticated satellite. So far PSLV has consecutive 19 successful launches.

8. The total cost of mission is about 500 crores. While the cost of the rocket is about 120 crores, the satellite costs around 380 crores. However, none of them are insured.

9. The project Director N Valarmathi, is the first woman to head a remote sensing satellite project, and the second to be the satellite project director at ISRO.

10. Apart from RISAT-1, India already has another spy satellite RISAT-2 acquired from Israel which was launched in 2009.

[Wahe Guru]

Pslv-c19 launching risat-1

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