science

Indian Data Relay Satellite System

Indian Data Relay Satellite System 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 Indian Data Relay Satellite System rather than just read about it. In short: Indian Data Relay Satellite System or IDRSS is a planned Indian constellation of Inter-satellite communications satellites. It is planned to initially comprise two satellites, CMS-04 (formerly IDRSS-1) & IDRSS-2 in geostationary orbit.

Key takeaways

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

Reference excerpt

Indian Data Relay Satellite System or IDRSS is a planned Indian constellation of Inter-satellite communications satellites. It is planned to initially comprise two satellites, CMS-04 (formerly IDRSS-1) & IDRSS-2 in geostationary orbit. It will facilitate relay of information between various Indian spacecraft, in-flight launch vehicle monitoring and assist the Indian Human Spaceflight Programme.

Objectives A Data Relay Satellite System (DRSS) facilitates continuous real-time communication between Low Earth orbit bound spacecraft to the ground station as well as inter-satellite communication. Such a satellite in geostationary orbit can track a low altitude spacecraft up to almost half of its orbit. India operates one of world's largest remote sensing satellites systems. Visibility of these satellites is not more than 10–15 minutes in a day and sometimes even lower. The IDRSS satellites, one opposite to each half of earth in GEO, can see about 80 per cent of the area where Indian remote sensing satellites are orbiting, hence enhancing visibility range and data transfer rates of satellites. IDRSS can also monitor a launch vehicle from the time it lifts off from the launch pad. Satellites will hereby also reduce dependency on ground stations. Implementation of the system will be essential for tracking Gaganyaan, India's future crewed spacecraft. The main objectives of IDRSS are:

TTC, Data, Audio and Video links to Gaganyaan TTC links to LEO satellite Data transfer from Antarctica Ground Stations

Design IDRSS satellites would be based on 2,000 kg class, I-2K extended bus and will be compatible for launch onboard GSLV Mk-II Launch Vehicle.

Payload Data relay payloads operating in S, Ka and Ku bands. 2.5 m deployable Cassegrain antenna System operating in dual frequency bands (S and Ka bands) 1.5 m fixed Cassegrain Antenna System operating in Ku and Ka frequency bands. The deployable antenna system will interface with the satellite by means of a deployable, pointing and tracking mechanism along with a S band rotary joint. Satellites might carry optical communication payload for increased data security and high transfer rates.

Satellites

Launch IDRSS was approved by the Government of India and had funds allocated in budget of 2019-20. CMS-04 would be the first spacecraft in the IDRSS constellation, and its launch is currently scheduled for 2025-26. IDRSS-2 would have a different orbit in order to facilitate better communication during vehicle ascent and with the ISRO terminal in Cocos islands.

See also Tracking and Data Relay Satellite System Luch (satellite) European Data Relay System Tianlian I

References

Worked examples

Example 1 — a first encounter with Indian Data Relay Satellite System

Start with the simplest possible case. Write down what Indian Data Relay Satellite System 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 Indian Data Relay Satellite System 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 Indian Data Relay Satellite System 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 Indian Data Relay Satellite System

In research: Indian Data Relay Satellite System 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 Indian Data Relay Satellite System 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: Indian Data Relay Satellite System is common in secondary-school and first-year university syllabi. It links to neighbouring topics 2023 in India, 2023 in spaceflight, Communications satellite constellations, so understanding it makes those chapters shorter.
In everyday life: Look for Indian Data Relay Satellite System 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 Indian Data Relay Satellite System in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Indian Data Relay Satellite System 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 Indian Data Relay Satellite System out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Indian Data Relay Satellite System in simple terms?

Why does Indian Data Relay Satellite System 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 Indian Data Relay Satellite System?

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 Indian Data Relay Satellite System.