National News
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
J&K Heading For ‘Historic’ Assembly Elections Under National Flag & Constitution: Amit Shah
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Jammu, Sep 7: Union Home Minister Amit Shah on Saturday assured restoration of statehood to Jammu and Kashmir after the assembly polls, which he said are the first under the national flag and the Constitution following the abrogation of Article 370 by the Modi government.
He accused the Congress-National Conference alliance of making attempts to revive the “old system”.
The NDA government will not allow the revival of terrorism, “autonomy”, and injustice with any community including Gujjars, Pahari, Bakerwals and Dalits who were granted reservation by the BJP dispensation, he said.
Shah is in Jammu on a two-day visit to boost the BJP’s election campaign for the three-phase assembly elections, beginning September 18.
He released the party’s manifesto on his first day of visit on Friday and also chaired two crucial meetings with senior leaders to discuss the campaign strategy.
“The coming elections in J-K are historic because after Independence, the polls are happening the first time under our national flag and Constitution, unlike in the past practice of two flags and two constitutions. We have only one prime minister from Kashmir to Kanyakumari and he is Modi,” the home minister told a BJP workers’ rally here on Saturday.
Taking a dig at the National Conference-Congress alliance, Shah alleged they are trying to push Jammu and Kashmir into the fire of terrorism once again when the government has brought down terror incidents in the union territory by 70 percent.
“The National Conference and the Congress will never be able to form a government in J-K, be confident about it,” Shah told the party workers, encouraging them to ensure the success of the BJP candidates to form the next government.
National News
Chandrababu Naidu Narrowly Escapes As Speeding Train Passes Inches Away From Him During Flood Inspection In Vijayawada
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Andhra Pradesh Chief Minister N Chandrababu Naidu had a narrow escape while inspecting flood-affected areas in Vijayawada. On September 3, Naidu was on a small bridge evaluating the damage caused by recent floods when a speeding passenger train passed dangerously close to him.
Naidu, along with his security personnel and officials, was standing near the railing on a narrow platform when the train whizzed by. A video of the incident has gone viral, showing the Chief Minister and his team standing just inches away from the fast-moving train. Passengers aboard the train were seen waving at Naidu as it sped past. Fortunately, no one was injured during the incident.
Situation worsens due to heavy rains
Meanwhile, the flood situation in Andhra Pradesh has worsened due to heavy rains, claiming the lives of at least 32 people.
Vijayawada and surrounding areas have been particularly hard-hit, with thousands displaced from low-lying regions.
The NTR district, which encompasses Vijayawada, has suffered the most, with 24 fatalities. Other severely affected areas include Guntur, with seven deaths, and Palnadu, with one reported death.
More than 40,000 people have been moved to relief camps across the state as water levels continue to rise. Farmers, too, have borne the brunt of the flooding, with over 2.35 lakh farmers reporting significant crop damage due to the unrelenting rains.
In response to the crisis, Andhra Pradesh Deputy Chief Minister Pawan Kalyan has donated Rs 5 crore for flood relief. His contribution is aimed at supporting recovery efforts across the state, with 400 panchayats set to receive Rs 1 lakh each.
“I will make sure these funds are directly deposited into the panchayats’ accounts, ensuring they are used for immediate flood recovery,” said Kalyan in a statement.
The Andhra Pradesh government continues to monitor the situation closely, working to provide relief and assistance to affected areas as rains persist across the region.
National News
PM Modi To Not Address UNGA Debate This Time, Jaishankar To Represent India
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Prime Minister Narendra Modi will not be addressing United Nations General Assembly debate scheduled to take place later this year and India’s Minister of External Affairs S Jaishankar will be representing India instead on September 28. PM Modi will be travelling to New York though, to attend a major community event at Nassau Veterans Memorial Coliseum in Long Island. The event is slated to take place on September 22. PM Modi will also be attending United Nations’ ‘Summit of the Future’ on September 22-23. This summit is focused on global co-operation for challenges that await humanity.
The general debate of the 79th UNGA session is scheduled to be held between September 24 and September 30. The summit will see major world leaders addressing the world. US President Joe Biden will address the assembly as well. This will be his last address to the UNGA as president of the United States as a new president will be elected in the presidential elections slated to take place in November this year. The contest will be between Republican Party nominee Donald Trump and Democratic Party nominee Kamala Harris.
Modi’s last address to the UNGA came in September 2021. He visited UN headquarters in June 2022.
The community event in Long Island has seen registration from over 24,000 Indian-Americans. PM Modi held his first such event at Madison Square Garden in 2014. This upcoming event marks the 10-year anniversary of the event.
That registrations for PM Modi’s event came through 590 community organisations in the US. There was a huge response from the tri-state area.
PM Modi’s community outreach events in the US have in past, drawn huge crowds. Last such event was ‘Howdy Modi’ which was held in Houston in 2019. The event had witnessed enthusiastic participation from Indian-Americans.
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