logo
Indo-US Earth Radar Mission: NISAR To Finally Lift-Off From Sriharikota On July 30

Indo-US Earth Radar Mission: NISAR To Finally Lift-Off From Sriharikota On July 30

News187 days ago
NISAR has been nearly a decade in the making, with scientists from both India and the United States meticulously developing two scientific payloads for the powerful satellite
After a long delay, the much-anticipated Indo-US joint satellite mission, NISAR, is set to launch from Sriharikota at 5:40 pm on July 30, the Indian Space Research Organization (ISRO) confirmed on Monday. The mission will deploy one of the largest and most advanced radar systems in space to provide an unprecedented view of the Earth.
The satellite will lift-off on a GSLV-F16 from Satish Dhawan Space Centre in Sriharikota, and inject it into a 743 km Sun-synchronous orbit with an inclination of 98.4 degrees.
Weighing nearly 2392 kg, the NASA-ISRO Synthetic Aperture Radar (NISAR) has been developed jointly by scientists from ISRO as well as NASA. NISAR has been nearly a decade in the making, with scientists from both India and the United States meticulously developing the mission's two scientific payloads — even through the challenges posed by the Covid-19 pandemic. While NASA developed the L-band radar for longer-wavelength imaging, ISRO and the Space Applications Centre (SAC) in Ahmedabad built the complementary S-band radar.
It is the first satellite to observe the Earth with a dual frequency synthetic aperture radar both using NASA's 12-metre unfurlable mesh reflector antenna integrated to ISRO's modified 13K satellite bus.
The powerful satellite will observe Earth with a swath of 242 km and provide high-resolution imagery using SweepSAR technology for the first time, said the space agency. It will scan the entire globe and provide all weather, day and night data at an interval of 12 days. It can even detect small changes in the Earth's surface, any deformation, movement of ice sheets and loss of vegetation.
According to the space agency, NISAR will enable a wide range of applications, and help in studies which require classification of sea ice, monitoring of shorelines, changes in soil moisture, mapping and monitoring of surface water resources, as well as characterising storms, and detecting ships in the sea. This will also help in streamlining early disaster response, said ISRO.
Initially scheduled for an early 2024 launch, the mission has faced multiple delays after one of its components had to be sent back to the US for corrections.
view comments
Disclaimer: Comments reflect users' views, not News18's. Please keep discussions respectful and constructive. Abusive, defamatory, or illegal comments will be removed. News18 may disable any comment at its discretion. By posting, you agree to our Terms of Use and Privacy Policy.
Orange background

Try Our AI Features

Explore what Daily8 AI can do for you:

Comments

No comments yet...

Related Articles

NASA-ISRO joint satellite NISAR set to be launched on July 30: All you need to know
NASA-ISRO joint satellite NISAR set to be launched on July 30: All you need to know

Indian Express

time21 minutes ago

  • Indian Express

NASA-ISRO joint satellite NISAR set to be launched on July 30: All you need to know

An earth observation satellite NISAR, jointly developed by NASA and ISRO, is set to be launched on July 30 at 5.40 pm from the country's only spaceport in Sriharikota, Andhra Pradesh. Weighing 2,392 kg, NISAR — which stands for NASA-ISRO Synthetic Aperture Radar — is a one-of-its kind earth observation satellite and will be the first one ever to observe the Earth in two frequencies — NASA's L-band and ISRO's S-band. 'Each system's signal is sensitive to different sizes of features on Earth's surface, and each specialises in measuring different attributes, such as moisture content, surface roughness, and motion,' said NASA. Putting two radar systems on a single satellite is a unique engineering feat because the two systems require different sets of hardware, and yet have to function in a complementary fashion without interfering with one another. Costing around USD 1.5 billion, it is the most expensive earth observation satellite in the world, with ISRO contributing Rs 469.4 crores for the satellite. The satellite will be launched on the GSLV-F16 and be put in a 734 km sun synchronous orbit — an orbit in which the satellite reaches over a place at the same time each day. The satellite will scan the entire globe every 12 days, proving a series of very detailed images of the Earth's surface. NISAR will provide an unprecedented view of the planet. With two radar systems in place, the satellite would be able to provide very high-resolution data, in all types of weather conditions, and both during the day and the night. The satellite is powerful enough to capture changes as small as one centimetre in size during its repeated observations over the same terrain. It will therefore be able to study the dynamic processes happening on Earth's surface, like retreat of glaciers, movement of sea ice, the path of a storm, changes in vegetation and forest cover, and even the movements during earthquakes and volcanoes. Scientists expect this satellite to provide new insights into our understandings of processes like climate change or natural hazards and better prepare for them. It can also help with practical applications such as tracking the changes in soil moisture or mapping surface water levels. 'The satellite will benefit India, the US and the entire world… it is also crucial for monitoring earth's natural resources,' ISRO chairman V Narayanan added. There have been several delays in NISAR's launch, with the last year's scheduled launch getting postponed after technical issues. There was a need to fix the one of the key components of the satellite — a 12-metre unfurlable antennae — for which the satellite was shipped back to the United States.

Isro-Nasa Earth observation satellite to be launched on July 30
Isro-Nasa Earth observation satellite to be launched on July 30

Time of India

time34 minutes ago

  • Time of India

Isro-Nasa Earth observation satellite to be launched on July 30

Isro-Nasa Earth observation satellite to be launched on July 30 CHENNAI: The Indian space research organisation (Isro) is gearing up for a series of exciting missions. According to the organisation's chief, Dr V Narayanan, Isro will launch the Nasa-Isro Synthetic aperture radar (NISAR) satellite on July 30 using the GSLV-F16 rocket . This satellite will scan the entire globe every 12 days, providing high-resolution, day-and-night, all-weather imagery across a 242 km swath. NISAR aims to support climate change research, disaster response, and Earth science studies. "We are going to launch the Nasa-Isro Synthetic aperture radar (NISAR) satellite through the GSLV-S16 rocket by July 30th," said the Isro chief. Nisar features Nasa's L-band and Isro's S-band radar, enabling it to track surface changes with centimeter-level precision. The satellite will systematically map Earth's surface, monitoring dynamic processes like glacier retreat, vegetation changes, and earthquakes. NISAR will deliver high-resolution data crucial for monitoring natural disasters, environmental degradation, and infrastructure stress. Narayanan also provided an update on the Gaganyaan Mission, which aims to send Indian astronauts into space. Before the crewed mission, Isro will conduct three uncrewed missions, including the Humanoid Mission. In December, a robot called Vyommitra will be sent into space to test the systems. Two uncrewed missions: If the humanoid mission is successful, two more uncrewed missions will be launched next year. Following the completion of all tests, the Gaganyaan Mission is scheduled to launch in March 2027. "We will conduct three uncrewed missions before the Gaganyaan mission. In December, a humanoid mission will be conducted, during which a robot called Vyommitra will be sent into space. If it's successful, then two uncrewed missions will be launched next year. After all the tests in March 2027, as PM Modi said, Gaganyan Mission will be launched," added the Isro chief. Vyommitra is a name derived from two Sanskrit words: "Vyoma" (meaning "space") and "Mitra" (meaning "friend"). This female robot astronaut is equipped with the capability to monitor module parameters, issue alerts, and execute life support operations. It can perform tasks such as operating six panels and responding to queries. These missions demonstrate India's growing capabilities in space exploration and technology, with Isro playing a vital role in advancing the nation's vision of self-reliance and global leadership in space.

Covid And Other Infections Leave Lasting Impact: Chronic Fatigue, Brain Fog
Covid And Other Infections Leave Lasting Impact: Chronic Fatigue, Brain Fog

NDTV

timean hour ago

  • NDTV

Covid And Other Infections Leave Lasting Impact: Chronic Fatigue, Brain Fog

Stellenbosch: Millions of people who recover from infections like COVID-19, influenza and glandular fever are affected by long-lasting symptoms. These include chronic fatigue, brain fog, exercise intolerance, dizziness, muscle or joint pain and gut problems. And many of these symptoms worsen after exercise, a phenomenon known as post-exertional malaise. Medically the symptoms are known as myalgic encephalomyelitis or chronic fatigue syndrome (ME/CFS). The World Health Organization classifies this as a post viral fatigue syndrome, and it is recognised by both the WHO and the United States Centers for Disease Control and Prevention as a brain disorder. Experiencing illness long after contracting an infection is not new, as patients have reported these symptoms for decades. But COVID-19 has amplified the problem worldwide. Nearly half of people with ongoing post-COVID symptoms - a condition known as long-COVID - now meet the criteria for ME/CFS. Since the start of the pandemic in 2020, it is estimated that more than 400 million people have developed long-COVID. To date, no widely accepted and testable mechanism has fully explained the biological processes underlying long-COVID and ME/CFS. Our work offers a new perspective that may help close this gap. Our research group studies blood and the cardiovascular system in inflammatory diseases, as well as post-viral conditions. We focus on coagulation, inflammation and endothelial cells. Endothelial cells make up the inner layer of blood vessels and serve many important functions, like regulating blood clotting, blood vessel dilation and constriction, and inflammation. Our latest review aims to explain how ME/CFS and long-COVID start and progress, and how symptoms show up in the body and its systems. By pinpointing and explaining the underlying disease mechanisms, we can pave the way for better clinical tools to diagnose and treat people living with ME/CFS and long-COVID. What is endothelial senescence? In our review, our international team proposes that certain viruses drive endothelial cells into a half-alive, "zombie-like" state called cellular senescence. Senescent endothelial cells stop dividing, but continue to release molecules that awaken and confuse the immune system. This prompts the blood to form clots and, at the same time, prevent clot breakdown, which could lead to the constriction of blood vessels and limited blood flow. By placing "zombie" blood-vessel cells at the centre of these post-viral diseases, our hypothesis weaves together microclots, oxygen debt (the extra oxygen your body needs after strenuous exercise to restore balance), brain-fog, dizziness, gut leakiness (a digestive condition where the intestinal lining allows toxins into the bloodstream) and immune dysfunction into a single, testable narrative. From acute viral infection to 'zombie' vessels Viruses like SARS-CoV-2, Epstein-Barr virus, HHV-6, influenza A, and enteroviruses (a group of viruses that cause a number of infectious illnesses which are usually mild) can all infect endothelial cells. They enable a direct attack on the cells that line the inside of blood vessels. Some of these viruses have been shown to trigger endothelial senescence. Multiple studies show that SARS-CoV-2 (the virus which causes COVID-19 disease) has the ability to induce senescence in a variety of cell types, including endothelial cells. Viral proteins from SARS-CoV-2, for example, sabotage DNA-repair pathways and push the host cell towards a senescent state, while senescent cells in turn become even more susceptible to viral entry. This reciprocity helps explain why different pathogens can result in the same chronic illness. Influenza A, too, has shown the ability to drive endothelial cells into a senescent, zombie-like state. What we think is happening We propose that when blood-vessel cells turn into "zombies", they pump out substances that make blood thicker and prone to forming tiny clots. These clots slow down circulation, so less oxygen reaches muscles and organs. This is one reason people feel drained. During exercise, the problem worsens. Instead of the vessels relaxing to allow adequate bloodflow, they tighten further. This means that muscles are starved of oxygen and patients experience a crash the day after exercise. In the brain, the same faulty cells let blood flow drop and leak, bringing on brain fog and dizziness. In the gut, they weaken the lining, allowing bits of bacteria to slip into the bloodstream and trigger more inflammation. Because blood vessels reach every corner of the body, even scattered patches of these "zombie" cells found in the blood vessels can create the mix of symptoms seen in long-COVID and ME/CFS. Immune exhaustion locks in the damage Some parts of the immune system kill senescent cells. They are natural-killer cells, macrophages and complement proteins, which are immune molecules capable of tagging and killing pathogens. But long-COVID and ME/CFS frequently have impaired natural-killer cell function, sluggish macrophages and complement dysfunction. Senescent endothelial cells may also send out a chemical signal to repel immune attack. So the "zombie cells" actively evade the immune system. This creates a self-sustaining loop of vascular and immune dysfunction, where senescent endothelial cells persist. In a healthy person with an optimally functioning immune system, these senescent endothelial cells will normally be cleared. But there is significant immune dysfunction in ME/CFS and long-COVID, and this may enable the "zombie cells" to survive and the disease to progress. Where the research goes next There is a registered clinical trial in the US that is investigating senescence in long-COVID. Our consortium is testing new ways to spot signs of ageing in the cells that line our blood vessels. First, we expose healthy endothelial cells in the lab to blood from patients to see whether it pushes the cells into a senescent, or "zombie," state. At the same time, we are trialling non invasive imaging and fluorescent probes that could one day reveal these ageing cells inside the body. In selected cases, tissue biopsies may later confirm what the scans show. Together, these approaches aim to pinpoint how substances circulating in the blood drive cellular ageing and how that, in turn, fuels disease. Our aim is simple: find these ageing endothelial cells in real patients. Pinpointing them will inform the next round of clinical trials and open the door to therapies that target senescent cells directly, offering a route to healthier blood vessels and, ultimately, lighter disease loads. (Author: Burtram C. Fielding, Dean Faculty of Sciences and Professor in the Department of Microbiology, Stellenbosch University; Etheresia Pretorius, Distinguished Professor in Physiological Sciences, Stellenbosch University, and Massimo Nunes, Postdoctoral Research Fellow , Stellenbosch University (Disclaimer Statement: Burtram C. Fielding works for Stellenbosch University. He has received funding from the National Research Foundation, South Africa and the Technology Innovation Agency. Resia Pretorius is a Distinguished Research Professor at Stellenbosch University and receives funding from Balvi Research Foundation and Kanro Research Foundation. She is also affiliated with University of Liverpool as a Honorary Professor. Resia is a founding director of the Stellenbosch University start-up company, Biocode Technologies and has various patents related to microclot formation in Long COVID. Massimo Nunes receives funding from Kanro Research Foundation.)

DOWNLOAD THE APP

Get Started Now: Download the App

Ready to dive into a world of global content with local flavor? Download Daily8 app today from your preferred app store and start exploring.
app-storeplay-store