NISAR Satellite: A Step Forward in Indo-US Space Collaboration

 

Introduction and About the NISAR Satellite

  • NISAR satellite is an earth observation mission, a joint venture by NASA and ISRO.
  • It was launched from the region of Sriharikota by ISRO. 
  • The basis of collaboration marks a significant step, reflecting the global scientific partnership between India, referred to as 'Vishwa Bandhu', and the United States.

 

Key Facts and Technical Features of NISAR Satellite

  • NISAR is the first of its kind to use dual-frequency radar, L-band and S-band, from a single platform.
  • The advanced technical feature enables advanced microwave imaging, providing polarimetric and interferometric data.
  • The dual-band Synthetic Aperture Radar (SAR) differentiates with L-band SAR penetrating through forest canopy, useful for biomass and deformation studies, and S-band SAR catering to monitor the surface level features like crops and wetlands. 
  • It was launched using Geosynchronous Satellite Launch Vehicle Mark II, specifically GSLV-F16 variant, India's largest rocket, placing a satellite in sun-synchronous polar orbit for the first time.
  • The mission life is expected to last for 5 years, covering phases including launch, deployment, commissioning, and science operations. 

 

Key Objectives and Significance of NISAR Satellite

  • The mission aims to provide high-resolution data every 12 days to monitor land changes across Earth. 
  • It helps in tracking ground deformations caused by earthquakes, landslides, and volcanic activities. 
  • It aids in forest management by observing woody vegetation for measuring forest biomass and carbon stock.
  • Agricultural monitoring such as crop growth cycles and changes in wetlands driven by climatic variations are part of its applications. 
  • It also studies glacier and sea ice melts in polar regions.
  • This satellite supports significant areas like disaster management, agriculture, and climate monitoring.

 

Understanding the Radar Band 

  • Radio frequencies (RF) are electromagnetic radiation with frequencies among 10 kHz and 100 GHz.
  • They are divided into groups or bands like "S-band", "L-band", etc., that exhibit similar properties. 
  • Bands with lower frequency, for instance, ones like L, S can penetrate through rain, clouds, and vegetation thereby used in mapping and earth observation. 
  • Conversely, the higher frequency bands like X, Q, V, W provide sharper images and better resolution but can be affected by weather and atmospheric conditions.

 

Looking Ahead and India's Role

  • The collaboration reflects the depth of the space exploration partnership between India and the United States.
  • India is now a part of the Artemis Accords and collaborates with NASA on human spaceflight.

 

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BHARAT Study: A Comprehensive Look into Ageing Biomarkers in India

 

An Overview of the BHARAT Study

  • Launched by the Indian Institute of Science under the Longevity India Programme, the BHARAT (Biomarkers of Healthy Aging, Resilience, Adversity, and Transitions) study aims to map and understand ageing biomarkers specific to the Indian population. 
  • The study's primary goals are to build a reliable "Bharat Baseline" - a reference that defines normal health markers specifically for Indians - and to use AI and machine learning to predict health outcomes and design effective interventions.

 

The Complexity of Ageing

  • Ageing is a multifaceted process influenced by numerous factors such as molecular changes, cellular adaptations, environmental impacts, lifestyle choices, and socioeconomic conditions. 
  • Due to this complexity, chronological age might not accurately represent a person's true biological age.

 

Need for India-Specific Data 

  • Current biomarkers and diagnostic standards, typically based on Western norms, might not be accurate or applicable to Indians, thereby risking misdiagnosis and ineffective treatment methods. 
  • Despite India's increasing life expectancy (now at 67.3 years), there is a forecasted increase in age-related diseases like Parkinson's (expected 168% increase by 2050) and a 200% rise in dementia cases. This highlights the need for early detection and preventive measures specifically tailored for the Indian population.

 

Role and Significance of Biomarkers in the Study

  • Biomarkers play a crucial part in the BHARAT study, which covers a broad spectrum of indicators, including genomic biomarkers, proteomic and metabolic markers, and environmental and lifestyle factors. 
  • These indicators would help define the "Bharat Baseline", thus ensuring more accurate diagnoses and effective treatment schemes for the Indian population.

 

Using AI and Machine Learning in Health Predictions

  • The BHARAT study also aims to use artificial intelligence and machine learning in analyzing complex multi-dimensional health datasets. 
  • Such technology would aid in predicting health outcomes and designing effective intervention strategies.

 

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DengiAll – India’s First Indigenous Dengue Vaccine

 

Introduction about DengiAll

  • DengiAll is the first indigenous tetravalent dengue vaccine in India.
  • The development of DengiAll represents a significant advancement in India's attempts to develop a safe and effective dengue vaccine.
  • As of the last update, DengiAll has achieved 50% enrollment in Phase 3 clinical trials.

 

Developer and Progress

  • Developed by Panacea Biotec under a licensing agreement with the US National Institutes of Health (NIH), DengiAll targets all four dengue virus subtypes.
  • The vaccine has demonstrated a balanced and robust immune response during Phase I and II trials.
  • No serious safety concerns have been reported amid these trials.

 

Significance of DengiAll

  • The development of DengiAll is crucial as there is currently no specific treatment available for dengue. 
  • Severe cases of dengue can lead to serious complications such as internal bleeding and shock. 
  • With DengiAll, the hope is to contain this mosquito-transmitted viral disease effectively.

 

Dengue and Its Impact

  • Dengue is a viral disease transmitted by the Aedes aegypti mosquito and is caused by the dengue virus (genus Flavivirus). 
  • Symptoms include high fever, severe headache, eye pain, muscle and joint pain, rash, and fatigue. Diagnosis is done through a blood test, and there is no specific antiviral treatment available currently; care is largely supportive. 
  • The female Aedes aegypti mosquito also spreads diseases like chikungunya, yellow fever, and Zika. 

 

Dengue Burden in India

  • India faces a heavy burden of dengue, with over 2.3 lakh cases and 297 deaths reported in 2024. 
  • This underscores the importance of vaccine development to tackle this public health issue. 
  • Dengvaxia, the first dengue vaccine, was approved by the US FDA in 2019, available for individuals aged 9–16 with a previous infection in endemic regions.

  

DengiAll hopes and concluding thoughts

  • DengiAll, as an indigenous solution, brings hope for providing a solution to the dengue problem prevalent across India.
  • While it has made promising progress in clinical trials, it is crucial to watch how it fares in the next phases.
  • Alongside, continued efforts in vector control and public health measures are also critical to combating dengue.

 

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Blocking of AI Web Crawlers and Impact on Content Rights

 

Introduction and Context

  • Major US and UK publishers have started blocking Artificial Intelligence (AI) web crawlers to limit unauthorised usage of their online content. 
  • This signals a significant step towards potential reform in AI governance, sparking discussions on consent, copyright, and fair revenue sharing schemes in a digital landscape. 
  • This move has triggered renewed calls in India for improvements to digital governance, copyright enforcement, and the ethical usage of AI. 

 

Understanding AI Web Crawlers

  • AI web crawlers are automated software systems that mine and collect content from the internet. 
  • They are specifically designed to assist in AI model training exercises, such as Large Language Models, and real-time information retrieval for AI assistants. 
  • Model Training Crawlers (like GPTBot from OpenAI, Amazonbot from Amazon and GoogleOther from Google) extract data from various websites to train generative AI models.
  • Live Retrieval Crawlers (used by AI platforms like Bing and ChatGPT) pull real-time data from websites to ensure up-to-date and relevant responses in AI search tools. 

 

Issuing Concerns in India in AI Governance

  • India presently lacks a comprehensive regulatory framework to supervise the methods of data acquisition and use by AI firms. 
  • This has resulted in a situation where larger tech firms can freely exploit Indian content without obtaining consent or jurisdiction, thereby disadvantaging smaller publishers.
  • AI companies often use blogs, news articles, and educational content to train their LLMs without explicit permission or compensation.
  • India's Copyright Act 1957 isn’t designed to handle AI-specific cases, such as derivative AI outputs or rights pertaining to training data.
  • The country lacks clear definitions and understanding of terms like "fair use" and "unlicensed training" in an AI context.
  • India is currently without a data protection law focusing on non-personal data, which is primarily employed in AI training.

 

Ethical AI Use and India’s Path Forward

  • The data sources utilised by AI developers are typically undisclosed, thereby denying original creators any credit or financial benefits.  
  • Training AI on unverified or outdated material can also introduce errors and biases, which can diminish public trust in AI systems.  
  • This highlights the need for India to craft a consent-based, rights-respecting digital environment.
  • Drawing from the EU's AI Act 2024 and US's approach to data rights, India needs to form a uniquely Indian model for AI governance that strikes a balance between innovation and creators' rights. 
  • The Ministry of Electronics and IT (MeitY) and the Ministry of Information & Broadcasting (I&B) should jointly legislate against "unauthorised data scraping".
  • A consent-oriented AI licensing framework should be introduced to protect creators’ rights.
  • Provisions for technical safety measures should be made, offering AI bot-blocking tools to Indian publishers via platforms such as Cloudflare to secure digital content.

 

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Ham Radio Communication & Life on the International Space Station with Indian Astronaut 

 

Introduction about Ham Radio

  • Ham radio, also known as amateur radio, is a non-commercial radio communication service used for purposes such as education, experimentation and emergency communication.
  • It involves the use of radio waves, transceivers and antennas to establish contact locally, globally and even from space. 

 

Ham Radio Communication in Space

  • In a unique occurrence of space-to-Earth communication, Indian astronaut Shubhanshu Shukla communicated with Earth using ham radio communication from aboard the ISS in the Axiom-4 mission.
  • This method of communication was first used in space in 1983 by astronauts, and the ISS features the ARISS (Amateur Radio on the ISS) system supported by countries such as the US, Russia, Canada, Japan and Europe. 

 

Ham Radio In India

  • In India, ham radio licenses can be obtained by individuals above 12 years of age from the Ministry of Electronics and Information Technology. 
  • Ham radio has been instrumental in facilitating emergency communications during disasters such as the Indian Ocean tsunami in 2004, the Uttarakhand floods in 2013, and various others.

 

About Radio Waves

  • Discovered by Heinrich Hertz, radio waves are a type of long-wavelength electromagnetic waves utilised in communication systems.
  • They can propagate through different media, such as line-of-sight, ionospheric reflection or satellite relay, allowing for long-distance transmission and are vital to wireless communication technology.

 

Life on the International Space Station (ISS)

  • In the microgravity environment of the ISS, astronauts consume dehydrated and packaged food that is rehydrated with hot water to avoid food crumbs from damaging equipment.
  • Meals are kept secure using Velcro trays, and utensils are cleaned without water but with wipes.
  • A diet rich in calcium, low in sodium and with Vitamin D intake is recommended for astronauts to maintain bone health during long space missions.

 

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Low-Cost Sensor for Toxic Sulfur Dioxide Detection 

 

Introduction and Novelty 

  • A team of scientists at the Centre for Nano and Soft Matter Sciences (CeNS) in Bengaluru has successfully created a highly sensitive yet low-cost sensor primarily engineered to detect Sulfur dioxide (SO?). 
  • The sensor has an outstanding capability of locating this toxic gas at astonishingly low concentrations, thus excelling over many commercial-grade sensors available in the market today. 
  • The device is beneficial for wide-scale public health use in densely populated urban areas or industrial regions where the harmful gases exposure remains a critical issue. 

 

Innovations in the Sensor's Development 

  • This newly fabricated sensor is a combination of two vital components - Nickel Oxide (NiO) and Neodymium Nickelate (NdNiO?). 
  • Nickel oxide works as the gas receptor, whereas Neodymium Nickelate performs the task of a transducer, sending out appropriate detection signals. 
  • The advanced sensor can detect Sulfur Dioxide (SO?) levels as marginal as 320 parts per billion (ppb), outperforming many of its commercial counterparts. 

 

Real-Time Detection and Threshold Alert System 

  • The innovative system incorporates real-time SO? detection feature. 
  • It is supplemented with an accessible and user-friendly threshold alert system signalling varying levels of danger through different colours (green for safe levels; yellow for warning), proving fit for public health use. 

 

About Sulfur Dioxide

  • Sulfur Dioxide (SO?) is a largely colourless and water-soluble gas that is toxic to human health. 
  • It is mainly produced by vehicles and industrial activities which can adversely affect public health, especially in urban or industrial zones. 
  • Prolonged or even brief exposure to the gas can cause severe respiratory problems, such as triggering asthma attacks, and in the long term, can lead to lung damage.

  

Public Health and Industrial Importance 

  • The affordable cost of the sensor means it can be deployed widely across industrial and urban areas where SO? is a significant concern. 
  • The sensor will provide real-time warnings, allowing authorities to respond quickly to elevated SO? levels. 
  • It can potentially drive significant improvements in public health by assisting in the prevention and control of respiratory-related diseases and conditions perpetuated by the toxic gas.

 

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High-Efficiency Material for Next-Gen Energy Storage

 

Introduction and Development:

  • The Centre for Nano and Soft Matter Sciences (CeNS), based in Bengaluru, has recently partnered with Aligarh Muslim University (AMU) to make significant advancements in energy storage technology.
  • Their research has resulted in the development of an energy storage material that is based on lanthanum-doped silver niobate, enhancing the performance of supercapacitors.

 

Lanthanum-Doped Silver Niobate Energy Storage Material:    

  • This advanced nanostructured compound is formed by infusing silver niobate, a lead-free and environmentally friendly perovskite material, with lanthanum, a rare-earth material.
  • The introduction of lanthanum reduces the size of the nanoparticles, thereby increasing the surface area available for energy storage and improving electrical conductivity for faster charge-discharge cycles. 
  • Lanthanum-doped silver niobate's responsiveness is stellar, with excellent energy retention (118%) and zero energy loss during use (100% coulombic efficiency).
  • This material is also eco-friendly, is devoid of any environmental complexity as it is lead-free, and can be used in green energy applications. 

 

Applications:

  • Its potential applications can be found in a vast array of devices and technologies, including portable electronics, electric vehicles (EVs), and renewable energy systems.
  • The efficiency of the material was demonstrated when it successfully powered an LCD display via a prototype supercapacitor. 

 

Insight on Supercapacitors: 

  • Supercapacitors, otherwise known as ultracapacitors, serve as energy storage systems that form a bridge between traditional capacitors and batteries. 
  • They are equipped with high power density, swift charge-discharge ability, and a durable life cycle that can withstand millions of cycles. 
  • Unlike batteries, supercapacitors store energy through electrostatic charge separation rather than through chemical reactions, improving their safety and longevity.
  • Despite having lower energy density than batteries, this can be enhanced by material doping processes, such as the integration of lanthanum within silver niobate, as demonstrated by CeNS and AMU.

 

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Smart Mosquito Surveillance System and Mosquito-Borne Diseases

 

Introduction to SMoSS

  • The Smart Mosquito Surveillance System (SMoSS) is a recent public health initiative launched by Andhra Pradesh, aimed at monitoring and controlling the local mosquito population.
  • This system utilises Artificial Intelligence (AI), drones, and Internet of Things (IoT) devices in an effort to precisely identify different mosquito species, their respective gender and population density, along with related weather conditions.
  • Upon detection of mosquito levels exceeding safe thresholds, real-time alerts are triggered to enable targeted spraying and fogging, a more efficient alternative to unjustified blind spraying.
  • Drones have been incorporated into this system to execute cost-effective larvicide spraying, while the implementation of a centralized dashboard ensures real-time monitoring and faster responses.
  • The management of this system will be carried out by specialised agencies, with their accountability being tracked through mobile apps. 

 

Common Mosquito-Borne Diseases

  • Mosquitoes are known carriers of multiple harmful diseases. Some of the most prevalent include Zika Virus Disease, Dengue, Yellow Fever, and Chikungunya.
  • Zika Virus Disease is primarily spread by the Aedes aegypti mosquito resulting in Microcephaly and other birth defects in babies born to infected pregnant women.
  • Dengue is caused by the dengue virus, also spread by Aedes mosquitoes. India continues to bear a significant dengue burden with over 2.3 lakh cases and 297 deaths reported in 2024.
  • Yellow Fever is a viral haemorrhagic disease, caused by the Aedes aegypti mosquito. It results in severe health conditions like jaundice, organ failure, or death in extreme cases. Annually, around 30,000 deaths are reported due to Yellow Fever.
  • Chikungunya, spread by Aedes aegypti mosquitoes, exhibits symptoms of sudden fever and intense joint pain. Currently, specific treatments for Chikungunya are not available.
  • Preventive measures, such as the 17D yellow fever vaccine, are regarded as safe and affordable by the World Health Organization (WHO). It is crucial to control mosquito populations in efforts to mitigate these diseases.

 

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Enhanced Phosphate Uptake in Gene-Edited Japonica Rice by Indian Scientists

 

Introduction and About 

  • Indian scientists have successfully achieved an increase in phosphate uptake in japonica rice varieties using the revolutionary genome editing tool, CRISPR-Cas9. 
  • This potentially transformative move for rice cultivation could lead to superior yields and a significant reduction in phosphate fertiliser usage. 

 

Role of CRISPR-Cas9 Technology

  • CRISPR-Cas9 is a revolutionary tool that allows scientists to selectively modify the genome. It works by using the Cas9 enzyme as molecular scissors to accurately cut DNA and insert, delete, or repair genetic material.
  • In rice cultivation, gene-editing using CRISPR-Cas9 increased the yield by 40% whilst using only 10% of the recommended phosphate fertilizer dose. 

 

Mechanism of Gene-Editing

  • The gene targeted for editing in japonica rice was OsPHO1;2, which is primarily responsible for phosphate transfer from the root to shoot. 
  • The editing approach did not aim to remove the repressor but the repressor's binding site, enhancing phosphate transfer and uptake.

 

Significance and Potential Impact

  • This groundbreaking approach to rice cultivation holds significance for India, a country that imports over 4.5 million tonnes of phosphate fertilisers annually. 
  • The use of gene-editing in rice cultivation paves the way to increased agricultural sustainability and self-reliance in the country.

 

Nutrient Deficiency in Indian Soils 

  • A 2022 study by the Centre for Science and Environment (CSE) revealed that approximately 85% of soil samples from India are deficient in organic carbon.
  • Indian soils showed a steep deficiency in essential nutrients like nitrogen (97% deficient), phosphorus (83% deficient), and potassium (71% deficient), which are crucial for successful crop growth and development.
  • Furthermore, Indian soils exhibited deficiencies in Boron (47%), Zinc (39%), Iron (37%), and Sulphur (36%), which impacts nutrition security as zinc-deficient grains can aggravate malnutrition. 

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