ISRO successfully launches earth observation satellite RISAT-2B
Sriharikota: In a pre-dawn launch on Wednesday, Indian space agency ISRO scripted history by successfully launching earth observation satellite RISAT-2B that would enhance the country's surveillance capabilities among others.
As the 25-hour countdown which had began Tuesday concluded, the agency's trusted workhorse, the Polar Satellite Launch Vehicle (PSLV-C46) blasted off at 5.30 am from the first launch pad of the Satish Dhawan Space Centre here on its 48th mission, carrying the 615 kg satellite.
The RISAT-2B (Radar Imaging Satellite-2B), meant for application in fields such as surveillance, agriculture, forestry and disaster management support, was successfully released into its orbit at about 15 minutes and 30 seconds after the lift-off.
Commenting on the launch from the Mission Control Centre, ISRO Chairman K Sivan said that the PSLV-C46 successfully injected RISAT-2B precisely in the designated orbit of 555 km, with an inclination of 37 degrees.
"This particular mission for PSLV is a very, very important mission. With this launch, PSLV lofts 50 tonnes to space by launching 354 satellites, including national, student and foreign satellites," Sivan said.
The ISRO chairman said the PSLV-C46 carried two important piggyback payloads, an indigenously developed processor and a low cost Inertial Navigation System.
"It is going to revolutionise our future launch vehicle missions" he said.
Sivan said the RISAT-2B is an advanced earth observation satellite. "In this satellite, another very complex new technology has flown. That is a 3.6 metre unfurlable radial rib antenna. This is also going to be the technology of the future," he added.
On future launches, Sivan said, "The next mission -- Chandrayaan-2 -- is going to be a landmark mission for India. It is going to be the most complex mission ever undertaken by ISRO. It is going to take place between July 9 and July 16 this year."
He added that the landing on the moon is expected to be on September 6. "It is going to land at a particular location where nobody has gone before."
After Chandrayaan-2, Sivan said, "ISRO would look at launching the very high resolution CARTOSAT 3 satellite."
"A second demonstration of the reusable launch vehicle is going to happen in the coming months. Cost effective small satellite launch vehicle developments are also going to take place in a few months from now," he added.
RISAT-2B launched on Wednesday would replace the RISAT-2, which was successfully launched in 2009.
The RISAT-2B is equipped with a synthetic aperture radar that can take pictures of the earth during day and night, and also under cloudy conditions.
With a mission life of five years, the satellite would also be used for military surveillance, ISRO sources told PTI.
The RISAT-2 has been actively used by India to monitor activities in camps across the border in Pakistan to thwart infiltration bids by terrorists.
The PSLV-C46 was the 14th flight of the PSLV in its core-alone configuration sans the use of the solid strap-on motors. It was the 72nd launch vehicle mission from Sriharikota and also marked the 36th launch from the first launch pad.
Wednesday's launch of the PSLV also marked the third launch in 2019.
The other two were the PSLV-C45/EMISAT mission, which successfully injected the EMISAT and 29 international customer satellites into their orbits on April 1, and the PSLV-C44, which successfully placed the Microsat-R and the Kalamsat-V2 satellites in designated orbits on January 24.
ISRO had launched RISAT-1, a microwave remote sensing satellite, on April 26, 2012 from Sriharikota.
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Sujit Nair raises concerns over speculation of DMK-AIADMK understanding to block TVK
Chennai: Journalist and political commentator Sujit Nair has expressed concern over speculation that the Dravida Munnetra Kazhagam and the All India Anna Dravida Munnetra Kazhagam could explore a post-poll understanding to prevent Vijay-led Tamilaga Vettri Kazhagam from forming the government in Tamil Nadu.
In a social media post, Sujit Nair said the election verdict in Tamil Nadu reflected a clear public demand for political change and argued that the mandate should be respected irrespective of political preferences.
Referring to reports and political discussions surrounding a possible understanding between the DMK and AIADMK, he said he hoped such developments remained only speculative conversations and did not turn into reality.
Nair stated that if such an alliance were to take shape, it would raise serious questions about ideological politics in the country. He said TVK had emerged through a democratic electoral process and that the legitimacy to govern in a parliamentary democracy comes from the people’s verdict.
According to him, attempts to prevent an electoral winner from forming the government through unexpected political arrangements may be constitutionally valid, but many people could view them as politically opportunistic.
He further said that such a move could particularly affect the political image of the DMK, which has historically projected itself around ideology, social justice and opposition politics. Nair said that in ideological terms, the DMK appeared closer to TVK than to the AIADMK, and joining hands with its long-time political rival only to remain in power could weaken its broader political narrative.
He added that the same questions would apply to the AIADMK as well, as the party had spent decades positioning itself against the DMK and such an arrangement could create discomfort among its cadre and supporters.
Drawing a comparison with Maharashtra politics in 2019, Nair said he had expressed similar views when the Shiv Sena formed an alliance with the Indian National Congress and the Nationalist Congress Party after the Assembly elections.
He said post-poll alliances between long-standing political rivals often create a public perception that ideology and electoral mandates become secondary when political power equations come into play.
Nair also said such developments increase public cynicism towards politics and reinforce the belief among voters that ideology is often sidelined after elections.
He maintained that the Tamil Nadu verdict was emphatic and said respecting both the spirit and substance of the mandate was important for the credibility of democratic politics.
