Sat Jul 26 23:50:00 UTC 2025: Okay, here’s a news article based on the provided text, along with a summary:

**Summary:**

ISRO (Indian Space Research Organisation) and NASA are jointly launching the NISAR (NASA-ISRO Synthetic Aperture Radar) satellite on July 30th from Sriharikota. This advanced earth-observation satellite will use dual-band radar to monitor earth’s surface changes with unprecedented detail, including those related to natural disasters, climate change, ecosystems, and infrastructure. The mission has cost over $1.5 billion and is designed for a three-year lifetime, with data freely available to users. ISRO plays a critical role in the mission, providing key hardware and launch services, while NASA contributed the L-band radar system. The mission’s data policy entails that the data NISAR produces will be freely available to all users (typically) within a few hours. The operations will be led from the ISRO Telemetry, Tracking and Command Network in Bengaluru and processed by India’s National Remote Sensing Centre.

**News Article:**

**ISRO and NASA Gear Up for Landmark NISAR Satellite Launch**

**Sriharikota, India – July 27, 2025** – The Indian Space Research Organisation (ISRO) is set to launch the NASA-ISRO Synthetic Aperture Radar (NISAR) satellite on July 30th from the Satish Dhawan Space Centre in Sriharikota. The mission is a collaborative effort between ISRO and NASA, representing a significant advancement in Earth observation technology.

The three-tonne NISAR satellite, a decade-long project costing over $1.5 billion, will provide unprecedented high-resolution data on changes occurring on the Earth’s surface. Equipped with a dual-band radar system, NISAR will be capable of observing changes through clouds, smoke, and vegetation, day and night, offering invaluable insights into earthquakes, volcanoes, ecosystems, ice sheet dynamics, floods, landslides, and infrastructure stability.

“NISAR represents a powerful global mission, giving ISRO guaranteed access to high‑resolution data tailored to India’s specific needs,” stated an ISRO spokesperson. The satellite will operate in a sun-synchronous polar orbit at 747 km altitude, using synthetic aperture radar (SAR) technology to bounce radar waves off the planet’s surface and measure how long the signal takes to come back and how its phase changes. NISAR combines an L-band SAR (1.257 GHz), which uses longer-wavelength radiowaves to track changes under thick forests and soil and deformations on the ground, and an S-band SAR (3.2 GHz), which uses shorter-wavelength radiowaves to capture surface details, such as crops and water surfaces.

ISRO has reserved routine, planned acquisitions with the S‑band SAR over India. The latter acquisitions have extended sensitivity to biomass, better soil‑moisture retrieval, and mitigate ionospheric noise — all capabilities tuned to India’s needs in agriculture, forestry, and disaster management.

ISRO is contributing the I-3K spacecraft bus, S-band radar electronics, high-rate telecom subsystem, and launch services via a GSLV Mk-II rocket. NASA provided the L-band SAR system and 12m mesh antenna.

The mission, designed for a three-year lifespan (with a design lifetime of at least five years), has a unique data policy, ensuring free access to data for all users within hours of acquisition.

Following the launch, mission operations will be centered at NASA’s Jet Propulsion Laboratory, but day-to-day flight operations will be led from the ISRO Telemetry, Tracking and Command Network in Bengaluru. India’s National Remote Sensing Centre will then process and distribute the data required for Indian users.

NISAR is poised to provide critical information for disaster response, climate change monitoring, resource management, and a wide array of scientific applications, marking a new era in collaborative space exploration.

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