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Type: Prelims Only

  • ISRO Missions and Discoveries

    What is Project NETRA?

    Prelims Only | Science Tech | Mains Paper 3: Awareness in various sc and tech fields

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Project NETRA

    Mains level: Space Debris

    The Indian Space Research Organisation (ISRO) is building up its orbital debris tracking capability by deploying new radars and optical telescopes under the Network for Space Objects Tracking and Analysis (NETRA) project.

    Project NETRA

    • The project will give India its own capability in space situational awareness (SSA) like the other space powers — which is used to ‘predict’ threats from debris to Indian satellites.
    • NETRA’s eventual goal is to capture the GEO, or geostationary orbit, scene at 36,000 km where communication satellites operate.
    • The initial SSA will first be for low-earth orbits or LEO which have remote-sensing spacecraft.
    • Under NETRA the ISRO plans to put up many observational facilities: connected radars, telescopes; data processing units and a control centre.
    • They can, among others, spot, track and catalogue objects as small as 10 cm, up to a range of 3,400 km and equal to a space orbit of around 2,000 km.
    • The NETRA effort would make India a part of international efforts towards tracking, warning about and mitigating space debris.

    What NETRA consists of?

    • In the plans are a high-precision, long range telescope in Leh and a radar in the North East.
    • Along with them, we will also use the Multi-Object Tracking Radar (MOTR) that we have put up at the Satish Dhawan Space Centre in Sriharikota, and the telescopes at Ponmudi and Mount Abu to get a broad SSA picture.
    • NORAD, or the North American Aerospace Defense Command, is an initiative of the U.S. and Canada that shares selective debris data with many countries.
    • The new SSA centre would consolidate debris tracking activities that are now spread across ISRO centres.
    • Currently there are 15 functional Indian communication satellites in the geostationary orbit of 36,000 km; 13 remote sensing satellites in LEO of up to 2,000 km; and eight navigation satellites in medium earth orbits.

    Why Space debris matters?

    • Space junk or debris consists of spent rocket stages, dead satellites, fragments of space objects and debris resulting from ASAT.
    • Hurtling at an average speed of 27,000 kmph in LEO, these objects pose a very real threat as collisions involving even centimetre-sized fragments can be lethal to satellites.
    • Last year, ISRO monitored 4,382 events in LEO and 3,148 events in the geostationary orbit where space objects closely approached Indian assets.
    • Fragments from the Fengyun-1C satellite (part of the anti-satellite test (ASAT) by China in 2007) and the Cosmos 2251-Iridium satellite collision in 2009 accounted for the maximum number of these threats.
    • The observations also covered 84 “close approaches of less than one km” between Starlink satellites and Indian assets.

    Enhancing Space situational awareness (SSA)

    • India, as a responsible space power, should have SSA as a part of a national capability, as in the U.S. This is a vital requirement for protecting our space assets and a force multiplier.
    • The SSA has a military quotient to it and adds a new ring to the country’s overall security.
    • It uses satellites, ground and air radars to secure its two countries against attacks from air, space or sea.
    • With long-range tracking radars, the SSA also provides us the capability of an early warning system against ballistic missiles coming in at a height.
    • Apart from radars and telescopes, he said India should also think of deploying satellites that track other satellites — as the U.S. and other space powers had done.
    • Combined with other elements of military intelligence SSA would help us to understand motives behind any suspicious orbit changes of other satellites and to know if they were spying on or harming our spacecraft.

     

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  • Start-up Ecosystem In India

    Startup India Initiative and its Success

    Prelims Only | Economics | Mains Paper 3: Infrastructure: Energy, Ports, Roads, Airports, Railways Etc.

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Startup India Initiative

    Mains level: Success of the scheme

    A research, reviewing India’s entrepreneurial policy Startup India, affirmed its positive impact in reducing regional entrepreneurial disparities.

    Startup India Initiative

    • The Startup India campaign was first announced by PM Modi during his speech on 15 August 2015 address from the Red Fort.
    • The action plan for this initiative is focusing on three areas:
    1. Simplification and Handholding.
    2. Funding Support and Incentives.
    3. Industry-Academia Partnership and Incubation.
    • An additional area relating to this initiative is to discard restrictive States Government policies within this domain, such as License Raj, Land Permissions, Foreign Investment Proposals, and Environmental Clearances.
    • It was organized by the Department for promotion of industry and internal trade (DPI&IT).

    The success of the scheme

    • Minister for Commerce and Industry has informed the Lok Sabha that the entrepreneurial portal had more than 65,000 startups registered.
    • Of which, 40 attained the ‘unicorn’ status in the last twelve months, bringing the total as of date to 90.
    • India now ranks third among global startup eco-systems.
    • The networking, training and mentoring facilities provided by Startup India alongside entrepreneurship outreach campaigns in tier-2 and tier-3 cities, helped address regional entrepreneurial disparities in India.

    Limitations to its success

    (1) Heavy concentration in megacities

    • Entrepreneurship continues to be “highly concentrated” in three megacities, namely, Mumbai, Bengaluru and Delhi NCR.
    • India’s venture capital industry is also clustered in and around these three cities.
    • Such concentration can lead to increased economic inequality and hinder emergence of entrepreneurs from industries other than those belonging to the clusters.

    (2) Narrow Representation

    • The Startup India Action Plan document has no mention of the words ‘caste’, ‘tribe’, ‘marginalised’, ‘indigenous’ or ‘social group’.
    • Additionally, the policy’s reliance on technology does not take into consideration India’s digital divide, especially with respect to urban and rural areas.

    (3) Few Women in the industry

    • There is an under-representation of women and marginalized caste groups in the national startup ecosystem.

    Dedicated measures to support Women

    • 10% of the fund in the Fund of Funds operated by Small Industries Development Bank of India (SIDBI) has been reserved for women-led startups.
    • Further, all the alternate investment funds where the SIDBI takes equity have been mandated to contribute 20% in business which are women led.
    • There is a capacity-building program and a dedicated webpage for women on the portal.

    Way ahead

    • There is a need for policies and progressive strategies from governments to encourage startups and provide access and assistance in key areas including tax clarity, incubation, affordability and licensing.
    • In any case, governments should be well prepared and dedicated to creating a culture of startups to impact the entrepreneurial ecosystem in their cities, countries and citizens.

     

    Also read:

    [Burning Issue] Five Years of Startup India Scheme

     

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  • Forest Fires

    Places in news: Sariska Tiger Reserve

    Prelims Only | Enviro & Biodiversity | Mains Paper 3: Conservation, Environmental Pollution & Degradation, Eia

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Sariskta TR

    Mains level: Forest fires

    A massive fire has broken out in the Sariska Tiger Reserve and Air Force helicopters equipped with water sprays are battling to bring it under control.

    Sariska Tiger Reserve

    • Sariska Tiger Reserve is a tiger reserve in Alwar district, Rajasthan.
    • It stretches over an area of 881 sq km comprising scrub-thorn arid forests, dry deciduous forests, grasslands, and rocky hills.
    • This area was a hunting preserve of the Alwar state and was declared a wildlife sanctuary in 1958.
    • It was given the status of a tiger reserve making it a part of India’s Project Tiger in 1978.
    • It is the first reserve in the world with successfully relocated tigers.
    • It is a part of the Aravalli Range and the Khathiar-Gir dry deciduous forests eco-region.

    Existential threats

    • It is rich in mineral resources, such as copper.
    • In spite of the Supreme Court’s 1991 ban on mining in the area, marble mining continues to threaten the environment.

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  • Water Management – Institutional Reforms, Conservation Efforts, etc.

    Detecting Microplastics in Human Blood

    Prelims Only | Enviro & Biodiversity | Mains Paper 3: Conservation, Environmental Pollution & Degradation, Eia

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Microplastics

    Mains level: Microplastics Contamination

    A study by researchers from The Netherlands has found Microplastics in blood samples. About half of these were PET (polyethylene tertraphthalate) plastics, which is used to make food grade bottles.

    What are Microplastics?

    • Microplastics are tiny bits of various types of plastic found in the environment.
    • The name is used to differentiate them from “macroplastics” such as bottles and bags made of plastic.
    • There is no universal agreement on the size of microplastics. It defines microplastic as less than 5mm in length.
    • However, for the purposes of this study, since the authors were interested in measuring the quantities of plastic that can cross the membranes and diffuse into the body via the blood stream.
    • Hence they agreed on an upper limit on the size of the particles as 0.0007 millimetre.

    What were the plastics that the study looked for in the blood samples?

    • The study looked at the most commonly used plastic polymers.
    • These were polyethylene tetraphthalate (PET), polyethylene (used in making plastic carry bags), polymers of styrene (used in food packaging), poly (methyl methylacrylate) and poly propylene.
    • They found a presence of the first four types.

    Significance of the study

    • Making a human health risk assessment in relation to plastic particles is not easy, perhaps not even possible, due to the lack of data on exposure of people to plastics.
    • In this sense, it is important to have studies like this one.
    • The authors of the paper also remark that validated methods to detect the tiny (trace) amounts of extremely small-sized (less than 10 micrometre) plastic particles are lacking.
    • Hence this study, which builds up a methods to check the same, is important.

    Health hazard of microplastics

    • It is not yet clear if these microplastics can cross over from the blood stream to deposit in organs and cause diseases.
    • The report point out that the human placenta has shown to be permeable to tiny particles of polystyrene ( 50, 80 and 24 nanometre beads).
    • Experiments on rats where its lungs were exposed to polystryrene spheres (20 nanometre) led to translocation of the nanoparticles to the placental and foetal tissue.
    • Oral administration of microplastics in rats led to accumulation of these in the liver, kidney and gut.
    • Further studies have to be carried out to really assess the impact of plastics on humans.

     

    Try this PYQ:

    Q. Why is there a great concern about the ‘microbeads’ that are released into environment?

    (a) They are considered harmful to marine ecosystems.

    (b) They are considered to cause skin cancer in children.

    (c) They are small enough to be absorbed by crop plants in irrigated fields.

    (d) They are often found to be used as food adulterants.

     

    Post your answers here.

     

     

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  • Climate Change Impact on India and World – International Reports, Key Observations, etc.

    The phenomenon of Coral Bleaching

    Prelims Only | Enviro & Biodiversity | Mains Paper 1: Important Geophysical Phenomena

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Coral Bleaching

    Mains level: Coral Reefs and their significance

    The management authority of the world’s largest coral reef system, Australia’s Great Barrier Reef, confirmed on March 25 that the reef is experiencing a mass coral bleaching event.

    What are Coral Reefs?

    • Corals are marine invertebrates or animals not possessing a spine.
    • Each coral is called a polyp and thousands of such polyps live together to form a colony, which grows when polyps multiply to make copies of themselves.
    • Australia’s Great Barrier Reef is the world’s largest reef system stretching across 2,300 km.
    • It hosts 400 different types of coral, gives shelter to 1,500 species of fish and 4,000 types of mollusc.
    • Corals are of two types — hard coral and soft coral:
    1. Hard corals, also called hermatypic or ‘reef building’ corals extract calcium carbonate (also found in limestone) from the seawater to build hard, white coral exoskeletons.
    2. Soft coral polyps, however, borrow their appearance from plants, attach themselves to such skeletons and older skeletons built by their ancestors. Soft corals also add their own skeletons to the hard structure over the years and these growing multiplying structures gradually form coral reefs. They are the largest living structures on the planet.

    How do the feed themselves?

    • Corals share a symbiotic relationship with single-celled algae called zooxanthellae.
    • The algae provides the coral with food and nutrients, which they make through photosynthesis, using the sun’s light.
    • In turn, the corals give the algae a home and key nutrients.
    • The zooxanthellae also give corals their bright colour.

    What is Coral Bleaching?

    • Bleaching happens when corals experience stress in their environment due to changes in temperature, pollution or high levels of ocean acidity.
    • Under stressed conditions, the zooxanthellae or food-producing algae living inside coral polyps start producing reactive oxygen species, which are not beneficial to the corals.
    • So, the corals expel the colour-giving zooxanthellae from their polyps, which exposes their pale white exoskeleton, giving the corals a bleached appearance.
    • This also ends the symbiotic relationship that helps the corals to survive and grow.
    • Severe bleaching and prolonged heat stress in the external environment can lead to coral death.

    Impact of climate change

    • Over the last couple of decades, climate change and increased global warming owing to rising carbon emissions and other greenhouse gases have made seas warmer than usual.
    • Under all positive outlooks and projections in terms of cutting greenhouse gases, sea temperatures are predicted to increase by 1.5°C to 2°C by the time the century nears its end.
    • The first mass bleaching event had occurred in 1998 when the El Niño weather pattern caused sea surfaces in the pacific ocean to heat up; this event caused 8% of the world’s coral to die.
    • The second event took place in 2002.
    • In the past decade, however, mass bleaching occurrences have become more closely spaced in time, with the longest and most damaging bleaching event taking place from 2014 to 2017.

    Significance of Corals

    • Coral reefs support over 25% of marine biodiversity, including fish, turtles and lobsters; even as they only take up 1% of the seafloor.
    • The marine life supported by reefs further fuels global fishing industries. Even giant clams and whales depend on the reefs to live.
    • Besides, coral reef systems generate $2.7 trillion in annual economic value through goods and service trade and tourism.
    • In Australia, the Barrier Reef, in pre-COVID times, generated $4.6 billion annually through tourism and employed over 60,000 people including divers and guides.
    • Aside from adding economic value and being a support system for aquatic life, coral reefs also provide protection from storm waves.
    • Dead reefs can revive over time if there are enough fish species that can graze off the weeds that settle on dead corals, but it takes almost a decade for the reef to start setting up again.

    Current condition of the Great Barrier Reef

    • The United Nations Intergovernmental Panel on Climate Change (IPCC) released its report this month, which warned that the life of the Great Barrier is in grave danger.
    • The report said that if temperatures continue to rise, bleaching events may occur more often and a large proportion of the remaining reef cover in Australia could be lost.
    • Just a couple of weeks after this warning, the Barrier Reef Authority confirmed a mass bleaching phenomenon affecting all pockets of the reef system.

    Try this PYQ:

    Q. Consider the following statements:

    1. Most of the world’s coral reefs are in tropical waters.
    2. More than one third of the world’s coral reefs are located in the territories of Australia, Indonesia and Philippines.
    3. Coral reefs host far more number of animal phyla than those hosted by tropical rainforests.

    Which of the above statements is/are correct?

    (a) 1 and 2 only

    (b) 3 only

    (c) 1 and 3 only

    (d) 1 and 3 only

     

    Post your answers here.

     

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  • Indian Army Updates

    What are Articulated All-Terrain Vehicles?

    Prelims Only | Security Issues | Mains Paper 3: Various Security Forces, Agencies & Their Mandates

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Articulated All-Terrain Vehicles

    Mains level: Not Much

    The Indian Army has issued a Request For Information (RFI) for the supply of Articulated All-Terrain Vehicles to be deployed in Ladakh and Kutch.

    What are Articulated All-Terrain Vehicles?

    • Articulated ATV is a twin cabin, tracked, amphibious carrier for off road mobility.
    • The special design of this equipment exerts low ground pressure on the soil and a pull-push mode of locomotion between two cabins facilitates mobility over varied terrains like snow, desert and slush.
    • A ballistic protection in the cabin body ensures protection to troops travelling in it from small arms fire.
    • They can reach where wheeled vehicles cannot due to deep snow, slush or marshy terrain and can be very effective for patrolling and rapid deployment in operational situations.

    Utility of these vehicles

    • These vehicles are very useful to move troops or supplies in snow-bound terrains and in marshy/sandy environments.
    • The Indian Army wishes to use these vehicles in the snow-bound areas of Ladakh and in the marshy terrain of the Rann of Kutch.

     

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  • Modern Indian History-Events and Personalities

    Back in news: Malabar Rebellion

    Prelims Only | | Mains Paper 1: Modern Indian History

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Malabar Rebellion

    Mains level: Not Much

    The Indian Council for Historical Research (ICHR) has deferred its decision on a recommendation to remove the 1921 Malabar Rebellion martyrs, including Variamkunnaathu Kunhahamad Haji and Ali Musliyar, from the list of India’s freedom fighters.

    Malabar Rebellion

    • The Malabar Rebellion in 1921 started as resistance against the British colonial rule and the feudal system in southern Malabar but ended in communal violence between Hindus and Muslims.
    • There were a series of clashes between Mappila peasantry and their landlords, supported by the British, throughout the 19th and early 20th centuries.
    • It began as a reaction against a heavy-handed crackdown on the Khilafat Movement, a campaign in defence of the Ottoman Caliphate by the British authorities in the Eranad and Valluvanad taluks of Malabar.
    • The Mappilas attacked and took control of police stations, British government offices, courts and government treasuries.

    Who was Variyankunna Kunjahammed Haji?

    • He was one of the leaders of the Malabar Rebellion of 1921.
    • He raised 75000 natives, seized control of large territory from the British rule and set up a parallel government.
    • In January 1922, under the guise of a treaty, the British betrayed Haji through his close friend Unyan Musaliyar, arresting him from his hideout and producing him before a British judge.
    • He was sentenced to death along with his compatriots.

    Back2Basics: “Dictionary of Martyrs” Project

    • The project for compilation of “Dictionary of Martyrs” of India’s Freedom Struggle was commissioned by the Ministry of Culture, to the Indian Council of Historical Research (ICHR) to commemorate the 150th anniversary of uprising of 1857.
    • In this dictionary a martyr has been defined as a person who died or who was killed in action or in detention, or was awarded capital punishment while participating in the national movement for emancipation of India.
    • It includes ex-INA or ex-military personnel who died fighting the British.
    • Information of about 13,500 martyrs has been recorded in these volumes.

    Who are included?

    • It includes the martyrs of 1857 Uprising, Jallianwala Bagh Massacre (1919), Non-Cooperation Movement (1920-22), Civil Disobedience Movement (1930-34), Quit India Movement (1942-44), Revolutionary Movements (1915-34), Kissan Movements, Tribal Movements, Agitation for Responsible Government in the Princely States (Prajamandal), Indian National Army (INA, 1943-45), Royal Indian Navy Upsurge (RIN, 1946), etc.

    Five Volumes

    • Volume 1: In this volume, more than 4400 martyrs of Delhi, Haryana, Punjab and Himachal Pradesh have been listed.
    • Volume 2: In this volume more than 3500 martyrs of Uttar Pradesh, Uttarakhand, Madhya Pradesh, Chhattisgarh, Rajasthan and Jammu & Kashmir have been listed.
    • Volume 3: The number of martyrs covered in this volume is more than 1400. This volume covers the martyrs of Maharashtra, Gujarat and Sind.
    • Volume 4: The numbers of martyrs covered in this volume is more than 3300. This volume covers the martyrs of Bengal, Bihar, Jharkhand, Odisha, Assam, Arunachal Pradesh, Manipur, Meghalaya, Nagaland and Tripura.
    • Volume 5: The number of martyrs covered in this volume is more than 1450. This volume covers the martyrs of Andhra Pradesh, Telangana, Karnataka, Tamil Nadu and Kerala.

    Try this question from CSP 2020:

    Q. With reference to the history of India, “Ulgulan” or the Great Tumult is the description of which of the following event?

    (a) The Revolt of 1857

    (b) The Mappila Rebellion of 1921

    (c) The Indigo Revolt of 1859-60

    (d) Birsa Munda’s Revolt of 1899-1900

     

    Post your answers here.

     

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  • Defence Sector – DPP, Missions, Schemes, Security Forces, etc.

    DRDO’s Corner-Shot Weapon System

    Prelims Only | Science Tech | Mains Paper 3: Indigenization Of Technology

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: CSWS

    Mains level: Not Much

    A corner-shot weapon system (CSWS), designed and developed by the Defence Research and Development Organisation (DRDO), is at an advanced stage of being inducted by the Central Reserve Police Force (CRPF) and the Jammu and Kashmir police.

    What is CSWS?

    • The CSWS is a special purpose weapon designed by the Armament Research and Development Establishment (ARDE), Pune.
    • It can engage targets located around the corners as the system bends and captures video feed thus saving soldiers from any surprise counter-attack and is best suited for urban, close quarter situations.
    • It is equipped with weapon, camera, laser, infrared illuminator and torch in front portion, while display, electronics, battery and swivelling mechanism are located at rear portion.
    • The body is made from high-grade aluminium alloy to make it lighter and durable.

    Key features

    • Day-night firing capability, colour display, digital zoom, zeroing facility, hot keys, high power battery along with status display and compliance with JSS 5855 makes it a very potent system for security forces.
    • It is very helpful in Counter Insurgency and Counter Terror (CI/CT) operations.
    • This indigenously developed system has many superior features compared to its contemporary international systems and available for 9 mm GLOCK 17/19 and 1A1 Auto Pistol variant.

     

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  • Zoonotic Diseases: Medical Sciences Involved & Preventive Measures

    What is T-Cell Immunity?

    Prelims Only | Science Tech | Mains Paper 3: Awareness in various sc and tech fields

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: T-Cell Immunity

    Mains level: Long term health impact of COVID

    A new study from Wuhan has studied the role of T-Cell Immunity against prolonged and sever COVID-19.

    What are T-Cells?

    • Like B cells, which produce antibodies, T cells are central players in the immune response to viral infection.
    • For your immune system to fight off any kind of invader, such as a virus, you need a kind of white blood cell called a B cell, which makes antibodies, and a similar-looking white blood cell called a T cell.
    • T cells can play different roles altogether.
    • They can act as “killer cells”, attacking cells which have been infected with a virus or another kind of pathogen, or they can act as “helper cells” by supporting B cells to produce antibodies.

    How do they function?

    • Alongside antibodies, the immune system produces a battalion of T cells that can target viruses.
    • Some of these, known as killer T cells (or CD8+ T cells), seek out and destroy cells that are infected with the virus.
    • Others, called helper T cells (or CD4+ T cells) are important for various immune functions, including stimulating the production of antibodies and killer T cells.
    • T cells do not prevent infection, because they kick into action only after a virus has infiltrated the body. But they are important for clearing an infection that has already started.
    • In the case of COVID-19, killer T cells could mean the difference between a mild infection and a severe one that requires hospital treatment.

    What did the latest research find?

    • The researchers found that neutralising antibodies were detectable even 12 months after infection in “most individuals”.
    • It remained stable 6-12 months after initial infection in people younger than 60 years.
    • The researchers found that “multifunctional T cell responses were detected for all SARS-CoV-2 viral proteins tested”.
    • And most importantly, the magnitude of T cell responses did not show any difference immaterial of how severe the disease was.
    • While the ability of antibodies to neutralise was nearly absent against the Beta variant, it was reduced in the case of the Delta variant.

    Neutralizing antibodies

    • SARS-CoV-2-specific neutralising antibody and T cell responses were retained 12 months after initial infection.
    • Neutralising antibodies to the D614G, Beta, and Delta were reduced compared with those for the original strain, and were diminished in general.
    • Memory T cell responses to the original strain were not disrupted by new variants.
    • The findings show that robust antibody and T cell immunity against SARS-CoV-2 is present in majority of recovered patients 12 months after moderate-to-critical infection.

    Robustness of antibodies

    • The study reveals the durability and robustness of the T cell responses against variants, including Delta, even after one year of infection.
    • Most importantly, the robust and longstanding T cell responses were seen in people who have not been reinfected or vaccinated.
    • This would mean even in the absence of vaccination, a person who has been infected by the virus even one year ago would have robust immune responses.
    • It would offer protection against disease progressing to a severe form requiring hospitalization.

     

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  • ISRO Missions and Discoveries

    GSAT 7B and India’s other Military Satellites

    Prelims Only | Science Tech | Mains Paper 3: Awareness in various sc and tech fields

    Note4Students

    From UPSC perspective, the following things are important:

    Prelims level: Indias military satellites

    Mains level: Not Much

    The Defence Acquisition Council (DAC) chaired by Defence Minister Rajnath Singh cleared the Acceptance of Necessity (AoN) for procurement of a GSAT 7B satellite.

    What are the GSAT 7 series satellites?

    • GSAT 7 satellites are advanced satellites developed by the ISRO to meet the communication needs of the defence services.
    • The satellite was injected into a geosynchronous transfer orbit (GTO) of 249 km perigee (nearest point to earth), 35,929 km apogee (farthest point to earth) and an inclination of 3.5 degree with respect to the equator.
    • The GSAT 7 satellite was launched in August 2013 from an Ariane 5 ECA rocket from Kourou in French Guiana.
    • It is a 2,650 kg satellite which has a footprint of nearly 2,000 nautical miles in the Indian Ocean region.

    Utility of this satellite

    • This satellite is mainly used by the Indian Navy for its communication needs.
    • The GSAT 7 provides a gamut of services for military communication needs, which includes low bit voice rate to high bit rate data facilities, including multi-band communications.
    • Named Rukmini, the satellite carries payloads in UHF, C-band and Ku-band, and helps the Navy to have a secure, real time communication link between its land establishments, surface ships, submarines and aircraft.

    What will be the role of the GSAT 7B satellite?

    • The GSAT 7B will primarily fulfil the communication needs of the Army.
    • Currently, the Army is using 30 per cent of the communication capabilities of the GSAT 7A satellite, which has been designed for the Indian Air Force (IAF).
    • The GSAT 7B will also help the Army enhance its surveillance in border areas.
    • While many features of this satellite are still a closely guarded secret, it is expected that the state of the art, multi-band, military-grade satellite shall be a shot in the arm for the communication and surveillance needs of the Army.

    What is the role of the GSAT 7A satellite, which is already operational?

    • The GSAT 7A was launched in 2018 from the Satish Dhawan Space Centre in Sriharikota.
    • It has gone a long way in boosting the connectivity between the ground radar stations, airbases and the airborne early warning and control aircraft (AEW&C) of the IAF.
    • It also helps in satellite controlled operations of unmanned aerial vehicles (UAVs) which gives a great deal of reliability to the operations as compared to ground-controlled operations.
    • This satellite has 10 channels in Ku band with switchable frequency for mobile users, one fixed Gregorian or parabolic antenna, and four steerable antennae.

    Future plans

    • A GSAT 7C satellite is on the cards for the IAF, and a proposal to this effect was cleared by the DAC in 2021.
    • This satellite would facilitate real time communication with IAF’s software defined radio communication sets.
    • It will increase the capability of the IAF to communicate beyond the line of sight in a secure mode.

    What other kinds of military satellites does India have?

    • An Electromagnetic Intelligence Gathering Satellite (EMISAT), developed by ISRO, was launched in April 2020 through a Polar Satellite Launch Vehicle (PSLV-C45).
    • It has an Electronic Intelligence (ELINT) package called Kautilya, which allows the interception of ground-based radar and also carries out electronic surveillance across India.
    • The ELINT package provides the capability in direction-finding of radar and fixing their locations.
    • It is placed in a 748-km orbit, and is said to be based on the Israeli satellite system.
    • This satellite circles the globe pole-to-pole, and is helpful in gathering information from radars of countries that have borders with India.
    • India also has a RISAT 2BR1 synthetic aperture radar imaging satellite, which was launched in December 2019 from Sriharikota.
    • It has the capability to operate in different modes including very high resolution imaging modes of 1×0.5 metre resolution and 0.5×0.3 m resolution with a swath of 5-10 km.

     

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