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ISRO Launches X-Ray Polarimeter Satellite From First Launch-Pad, SDSC-SHAR In Sriharikota

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Sriharikota: India Began 2024 with PSLV rocket lifting off with XPoSat Sriharikota (Andhra Pradesh). On the first day of the calendar year 2024, India’s Polar Satellite Launch Vehicle-C58 (PSLV-C58) on Monday morning lifted off with the country’s X-ray Polarimeter Satellite (XPoSat) with 10 other payloads.

The 44.4-metre tall PSLV-C58 rocket with a lift off mass of 260 ton carrying XPoSat and 10 other experimental payloads on its fourth stage blasted off from the first launch pad at the Satish Dhawan Space Centre (SDSC) here at 9.10 a.m. Slowly rising up towards the skies with a thick orange flame at its tail, the rocket gained speed with a sound resembling rolling thunder and went up and up leaving a thick plume while the people assembled at the viewing gallery clapped their hands with pride. Interestingly, this is the first space mission for ISRO on January 1 for the Indian Space Research Organisation (ISRO).

Procedure after 21 minutes into flight of rocket

At about 21 minutes into its flight, the rocket will orbit XPoSat at an altitude of about 650 km. Subsequently, the rocket’s fourth stage will be restarted twice to reduce the orbit into a 350 km circular orbit to maintain in 3-axis stabilised mode for Orbital Platform (OP) experiments.

The PSLV Orbital Experimental Module-3 (POEM-3) experiment will be executed, meeting the objective of 10 identified payloads, supplied by the ISRO and the Indian National Space Promotion and Authorisation Centre (IN-SPACe), the Indian space agency said.

In its normal configuration, the PSLV is a four-stage/engine expendable rocket powered by solid and liquid fuels, alternatively, with six booster motors strapped onto the first stage to give higher thrust during the initial flight moments.

ISRO’s five types of rockets

The ISRO has five types of PSLV rockets — Standard, Core Alone, XL, DL, and QL. The major difference between them is the use of strap-on boosters which, in turn, largely depends on the weight of the satellites to be orbited.

The PSLV uses 6,4,2 solid rocket strap-on motors to augment the thrust provided by the first stage in PSLV-XL, QL & DL variants, respectively. However, strap-ons are not used in the core-alone version (PSLV-CA). The XPoSat is the first dedicated scientific satellite from the ISRO to carry out research in space-based polarisation measurements of X-ray emission from celestial sources. The satellite configuration is modified from the IMS-2 bus platform.

Three objectives of XPoSat

The configuration of the mainframe systems is derived based on the heritage of IRS satellites. It carries two payloads, namely POLIX (Polarimeter Instrument in X-rays) and XSPECT (X-ray Spectroscopy and Timing). The POLIX is realised by the Raman Research Institute and XSPECT is by the Space Astronomy Group of the U.R. Rao Satellite Centre (URSC).

According to the ISRO, the three objectives of XPoSat are: (a) To measure polarisation of X-rays in the energy band 8-30keV emanating from about 50 potential cosmic sources through Thomson Scattering by POLIX payload. (b) To carry out long-term spectral and temporal studies of cosmic X-ray sources in the energy band 0.8-15keV by XSPECT payload and (c) To carry out polarisation and spectroscopic measurements of X-ray emissions from cosmic sources by POLIX and XSPECT payloads, respectively, in the common energy band.

Passivation of PS4

After orbiting the XPoSat in 650km, the rocket’s fourth stage — PS4 stage — will be lowered to 350km, about 9.6 deg orbit, by restarting it twice. The left-out propellant in the PS4 will be disposed of through the main engines as a precursor to enabling the safety of the PS4 stage in atmosphere re-entry experiments planned in future. The oxidiser will be let out first followed by fuel in a predetermined sequence of operations. The existing scheme of spent stage passivation by venting the tank pressure will also be active.

Post passivation of PS4, the control of the stage is transferred to the POEM Avionics, the ISRO added. The POEM is configured as a 3-axis stabilised orbital platform for conducting experiments to space qualify systems with novel ideas. The PS4 Stage Orbital Platform Electrical power requirements are catered by a Flexible Solar Panel in conjunction with 50Ah Li-Ion battery in battery tied configuration.

Navigation process

The orbital platform consists of avionic systems to take care of navigation, guidance, control and telecommands and Orbital Platform Attitude Control System to cater to control of the platform to test the payloads, the ISRO said. The 10 payloads are from Take Me 2 Space, LBS Institute Technology for Women, K J Somaiya Institute of Technology, Inspecity Space Labs Private Ltd, Dhruva Space Private Ltd, Bellatrix Aerospace Private Ltd (two payloads) and three payloads from the ISRO.

National News

Land victory only tangible factor in war, says Army chief General Dhiraj Seth

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New Delhi, Sep 27: Indian Army chief General Dhiraj Seth on Sunday called a land victory the only “tangible factor” of success in a war, despite increasing technological innovations in the defence sector.

In his address at the media Defence Summit 2016, General Seth said: “We see salvo after salvo in today’s social media covering warfare across the globe, where information narratives and warfare are being fired to fog the real battle picture, creating uncertainty and confusion…However, I strongly feel, through all this clutter, one reality that does not change: land will always be the one and only tangible and useful factor of success.”

“Victory was, is, and will always be measured in territorial terms and that territory will be occupied, secured, and defended only by the force,” he asserted.

“Every capability must address one question: how does it help that soldier who puts his boots or tracks on the ground? That is why I would place him at the heart of the capability development that you’re looking at…”

Recalling a photograph taken on December 16, 1971 that depicted Pakistan surrendering at the end of the Bangladesh Liberation War, the army chief said: “The reason I allude to this today is that that photo gave us a very defining moment, because that was the precise moment when the war came to an end. But there is no demarcating moment; there is no termination point which indicates an end to the hostilities.”

He noted that conflict timelines are becoming “increasingly indefinite”, with intermittent spikes of intense fighting.

“Technology is certainly shortening the battles, but it is not necessarily shortening the war. These millennium wars can best be described as wars with pause. Pause, in fact, is becoming a part of military strategy, with the pause representing not the domination of conflict but merely a change in its intensity and manifestation,” General Seth added.

Underlining that there is no substitute for self-reliance, he said when crisis becomes prolonged, being ‘atmanirbhar’ (self-reliant) will mark the winning factor between the victor and the vanquished.

“Atmanirbharta must be about ensuring that we have the capability to endure without being constrained by what others can or cannot provide. That gives us a good reason to take a hard look at the very pathways of our indigenous capability,” he said.

However, the Army chief advised caution regarding “indigenous obsolescence”.

“The challenge is not just to reduce dependencies on others but also to ensure that what we develop indigenously does not become outdated by the time it is dumped. I would like to term it as indigenous obsolescence or that kind of a trap that can get created,” he said.

According to the government, the value of India’s indigenous defence production increased from Rs 46,429 crore in 2014-15 to a record Rs 1.78 lakh crore in 2025-26.

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Business

Uttar Pradesh’s exports to more than double as new FTAs kick in: Piyush Goyal

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Greater Noida, Sep 27: Union Commerce and Industry Minister Piyush Goyal highlighted that as global markets open up to India through Free Trade Agreements (FTAs), Uttar Pradesh’s annual exports are expected to more than double from Rs 2 lakh crore to Rs 5 lakh crore by 2030.

Addressing the UP International Trade Show in Greater Noida, Goyal said that expanding exports, investments and global market access would contribute to the state’s goal of becoming a $1 trillion economy.

The minister said the expanding global market access through FTAs, investments, tourism and international recognition of Uttar Pradesh’s products and brands would create new opportunities for the state’s entrepreneurs. He called for active participation and cooperation from the state’s trade and industrial community in taking forward this development journey.

He said new investments are expected to flow into India from across the globe and noted that Uttar Pradesh has emerged as a preferred investment destination, supported by favourable industrial policies and proactive industrial schemes. He said major corporations and global investors are arriving across sectors, creating new employment opportunities.

The minister highlighted the role of modern technology, international enterprises, and the evolving craftsmanship and technical skills of Uttar Pradesh’s youth in driving the state’s development. He said international events of this scale provide opportunities for direct access to global markets, enabling Uttar Pradesh’s diverse products, cuisines and services to reach international markets.

Goyal underscored the international participation at the UP International Trade Show, including six partner countries, hundreds of delegates and exhibitors, and buyer-seller meetings. He noted the participation of international stakeholders and the opportunities created for businesses through the event.

He highlighted the development of expressways, modern airports and industrial parks in Uttar Pradesh and noted the state’s growing presence across sectors including defence, semiconductors, electronics and other modern high-technology domains. He also referred to the expansion of a large robotics manufacturing facility in Greater Noida as an example of modern industrial growth and technological development.

The next frontier for Uttar Pradesh’s development lies in expanding exports in global markets, attracting international investments, strengthening tourism and building global recognition for brands from the state, he said, adding that the state is strengthening its foundation for greater global trade and progressing towards its development objectives.

The minister also highlighted the importance of coordination between the Central and state governments, along with the participation of citizens, youth and stakeholders from the trade and industrial sector, in supporting Uttar Pradesh’s continued economic and export growth.

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Entertainment

Assam CM reviews preparations at Bharat Mandapam for Bhupen Hazarika centenary finale

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Guwahati, Sep 27: Assam Chief Minister Himanta Biswa Sarma on Sunday visited Bharat Mandapam in New Delhi to review arrangements for the grand closing ceremony of the centenary celebrations of the legendary singer, composer and cultural icon Bharat Ratna Dr Bhupen Hazarika.

CM Sarma took stock of the facilities and preparations at the venue ahead of the concluding programme, which is being planned as a major tribute to Hazarika and his enduring contribution to Indian music and culture.

Sharing details of his visit on X, the Assam Chief Minister said the preparations were aimed at creating a memorable tribute befitting the legacy of the celebrated artiste, popularly known as ‘Sudhakantha’.

“Visited Bharat Mandapam today to review the facilities and preparations for the grand closing ceremony of the centenary celebrations of Bharat Ratna Dr. Bhupen Hazarika. We are curating an unforgettable tribute, one truly befitting the legacy of Sudhakantha,” CM Sarma posted.

The centenary celebrations have been organised to commemorate the 100th birth anniversary of Hazarika, whose music and literary works have had a lasting influence not only in Assam and the Northeast but across India and beyond.

Hazarika, who was born on September 8, 1926, in Assam, was known for his distinctive musical style and compositions that drew extensively from the cultural traditions and social realities of the Northeast.

His songs often addressed themes of humanity, social harmony, equality and the lives of ordinary people. The artist was conferred the Bharat Ratna, India’s highest civilian honour, posthumously in 2019. He had earlier received several other major national honours, including the Padma Vibhushan and the Dadasaheb Phalke Award.

The concluding ceremony at Bharat Mandapam is expected to mark the culmination of a year-long series of programmes celebrating Hazarika’s life, music and cultural legacy.

The Assam government has been highlighting the centenary as an opportunity to showcase Hazarika’s contribution to Indian cultural heritage and to introduce his works to younger generations. The final event is expected to bring together cultural personalities, dignitaries and artistes for a large-scale tribute to the legendary musician and filmmaker.

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