XPoSat Launches with POEM: 10 Payloads Innovate in Orbital Space"

Girish Linganna , Vartha Bharati | 29-12-2023 | 20:36:00 IST

India's space endeavors in 2024 are set to commence with a launch on the first day of the year. The Indian Space Research Organisation (ISRO) is currently in the final stages of pre-launch activities, preparing to deploy the X-Ray Polarimeter Satellite (XPoSat) aboard a Polar Satellite Launch Vehicle (PSLV). Following the deployment of the main satellite, the PSLV's last stage will carry an additional 10 payloads.

In addition to XPoSAT, the primary satellite, the PSLV mission will transport an additional 10 payloads or instruments into space using its final stage, known as the PSLV Orbital Experimental Module, or POEM.

Space Startups Launch Cutting-Edge Technologies

The five instruments included on the POEM platform, as detailed by ISRO, are:

- Radiation Shielding Experimental Module (RSEM): Designed to assess the effectiveness of Tantalum coating, developed by TakeMe2Space, Hyderabad.

- Women Engineered Satellite (WESAT): Aims to measure Solar Irradiance and UV Index, crafted by LBS Institute of Technology for Women.

- BeliefSat-0: An amateur radio satellite created by KJ Somaiya Institute of Technology.

- Green Impulse Transmitter (GITA): A green bipropellant CubeSat propulsion unit from Inspecity Space Labs Private Limited.

- Launching Expeditions for Aspiring Technologies - Technology Demonstrator (LEAP-TD): For demonstrating microsatellite subsystems, by Dhruva Space.

Other 5 includes

- RUDRA 0.3 HPGP and ARKA-200: Two instruments from Bengaluru's Bellatrix Aerospace; RUDRA 0.3 HPGP is a green monopropellant thruster, and ARKA-200 is a heater-less hollow cathode for Hall thrusters.

- Fuel Cell Power System (FCPS) and Silicon-based High Energy Cell: Two payloads developed by ISRO's Vikram Sarabhai Space Centre (VSSC); FCPS for fuel cell demonstration and a Silicon-based high energy cell.

- Dust Experiment (DEX); A payload from Physical Research Laboratory (PRL) designed to measure the interplanetary dust count.

"PSLV's POEM: Pioneering Orbital Space Experiments"

The POEM (PSLV Orbital Experimental Module) is an innovative platform utilized for performing experiments in space, making use of the final stage of ISRO's Polar Satellite Launch Vehicle (PSLV). The PSLV is a rocket with four stages. The initial three stages drop into the ocean after use, while the final stage (PS4), typically left as space debris, is repurposed in POEM for conducting orbital experiments after delivering the satellite to its orbit.

During the PSLV-C53 mission, the final stage, after being expended, will serve as a "stabilized platform" for various experiments. This mission marks the first instance where the PS4 stage, through the POEM platform, will orbit the Earth as a stabilized platform for conducting experiments.

The PSLV Orbital Experimental Module (POEM) is equipped with a specialized Navigation Guidance and Control (NGC) system to maintain stable orientation in space. It is powered by solar panels mounted around the PS4 tank, supplemented by a lithium-ion battery. For navigation, POEM utilizes an array of four sun sensors, a magnetometer, gyroscopes, and the NavIC system.

"PS4 Fuel Tank: POEM's Core"

The term "PS4 tank" refers to the fuel tank of the fourth stage (PS4) of the Polar Satellite Launch Vehicle (PSLV). In a multi-stage rocket like the PSLV, each stage has its own engines and fuel tanks. The PS4 is the uppermost stage of the PSLV, responsible for placing the satellite into its final orbit. The fuel tank in this stage, known as the PS4 tank, holds the propellant needed for this final push. In the context of the PSLV Orbital Experimental Module (POEM), solar panels are installed around this tank, utilizing the structure of the PS4 stage even after its primary function of satellite deployment is completed.

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Vinod Tawde seeks apology from Kharge, Rahul through legal notice, warns of defamation lawsuit

Cash-for-vote row

22-11-2024 ¦ 22-11-2024 IST

Vinod Tawde seeks apology from Kharge, Rahul through legal notice, warns of defamation lawsuit

Congress leader Rahul Gandhi with chief Mallikarjun Kharge | PC: PTI File Photo

New Delhi, Nov 22: BJP leader Vinod Tawde has demanded an apology from Congress president Mallikarjun Kharge and the Leader of Opposition in Lok Sabha Rahul Gandhi for making "false and baseless" allegations against him in the cash-for-votes incident in Maharashtra, saying if they don't he would sue them for defamation.

Tawde was accused by Bahujan Vikas Aghadi, a regional party, of distributing Rs 5 crore to woo voters, with its members barging into a hotel room on November 19 in a Mumbai suburb, where the BJP leader was present.

The former Maharashtra minister and BJP national general secretary claimed innocence, saying the alleged amount was not recovered in the probe by the Election Commission and police.

"The Congress only believes in spreading lies, and this incident is a proof of the party's low level politics to dent me and my party's image," Tawde said.

The two Congress leaders and the party spokesperson Supriya Shrinate seized on the row to accuse the BJP of using money power to influence the November 20 assembly polls in the state.

The legal notice sent to the three claimed that they were aware that they were pushing a "totally false story fabricated" by them.

"You all have deliberately, mischievously with the sole intention of damaging the reputation of our client intentionally fabricated the story distribution of money. You all have published false, baseless allegations against our client on various media for tarnishing his image in the eyes of right thinking people in the society," the notice read.

The Congress leaders were in a "great hurry" to damage Tawde's reputation, they did not bother to check the fact and or despite knowing the entire fact they made the false, baseless allegations, it said.

"The entire imputation made by you all are totally false, baseless, malicious and mala fide and as our client is in no way involved in any such illegal activity and as a responsible office bearer of the national political party he is aware of his duties," it added.

The notice demanded an "unconditional apology" to Tawde within 24 hours from the time the receipt of the notice, which was sent on November 21, and published in newspapers and X.

If they do not offer apology, then Tawde will initiate criminal proceedings under Section 356, which covers defamation, of the Bharatiya Nyaya Sanhita and also civil proceedings for the damages of Rs 100 crore against the three Congress leaders, the notice said.