science

GSAT-7R

GSAT-7R is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand GSAT-7R rather than just read about it. In short: GSAT-7R (also known as CMS-03) is a multi-band communication satellite developed by ISRO for the Indian Navy. The satellite is meant to replace the existing and operational GSAT-7.

Key takeaways

GSAT-7R belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect GSAT-7R to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of GSAT-7R from memory before moving on to harder problems.

Reference excerpt

GSAT-7R (also known as CMS-03) is a multi-band communication satellite developed by ISRO for the Indian Navy. The satellite is meant to replace the existing and operational GSAT-7.

Satellite The satellite, weighing 4,410 kilograms (9,720 lb), is meant to transmit voice, video and data among the naval ships, submarines, aircraft and Maritime Operation Centres of the Indian Navy deployed across the Indian Ocean Region, covering up to 2,000 km from India's coastline. The satellite employs advanced payloads in multiple frequency bands, including UHF, S, C and Ku bands. It is also equipped with indigenous components like a 1,200 litres (260 imp gal; 320 US gal) propulsion tank and collapsible antenna systems. It also has a planned lifespan of 15 years. The contract for the ₹1,589 crore (US$225.65 million) satellite project was signed on 11 June 2019 between the Indian Navy and the ISRO.

History During the time of contract signing in 2019, the projected launch date of the satellite was expected between 2020 and 2022.By August 2025, the delivery timeline had slipped by few years to November 2025. By 23 October, the launch date was scheduled on 2 November. The vehicle performance of LMV3-M5 had been enhanced by 10% to accommodate the CMS-03 satellite which is heavier than its payload capacity of 4 tonnes (3.9 long tons; 4.4 short tons) for GTO orbits. The satellite assembly and integration with launch vehicle has been completed by early October 2025. The launch vehicle was moved to the launchpad on 26 October and pre-launch procedures were initiated thereafter. It is the heaviest satellite to be launched to the Geostationary Transfer Orbit orbit from India till date. A preflight inspection fixed problems in the fuel control systems that plagued the NVS-02 satellite which used a similar spacecraft bus. On 2 November 2025, at 5:26 pm IST, ISRO successfully placed the CMS-03 satellite into the desired orbit through the LVM3-M5 rocket from the Second Launch Pad of the Satish Dhawan Space Centre, Sriharikota. The mission featured an experiment, re-ignition of the cryogenic upper stage. The satellite was separated from the launch vehicle at around 16 minutes in sub-GTO orbit. from launch with a perigee of 26,700 kilometres (16,600 mi). The upper stage of the rocket was passivated. Given the NORAD ID 66310 and International Designator 2025-249A, the stage re-entered the planet's atmosphere by 12:08 UTC on 30 July 2026 over the Atlantic Ocean.

Illustrations

Worked examples

Example 1 — a first encounter with GSAT-7R

Start with the simplest possible case. Write down what GSAT-7R claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to GSAT-7R before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about GSAT-7R ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of GSAT-7R

In research: GSAT-7R appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses GSAT-7R in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: GSAT-7R is common in secondary-school and first-year university syllabi. It links to neighbouring topics Communications satellite stubs, GSAT satellites, November 2025 in India, so understanding it makes those chapters shorter.
In everyday life: Look for GSAT-7R outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study GSAT-7R in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what GSAT-7R means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain GSAT-7R out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is GSAT-7R in simple terms?

GSAT-7R (also known as CMS-03) is a multi-band communication satellite developed by ISRO for the Indian Navy. The satellite is meant to replace the existing and operational GSAT-7.

Why does GSAT-7R matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study GSAT-7R?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on GSAT-7R.