astronomy

Y. S. Rao

Y. S. Rao is a astronomy 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 Y. S. Rao rather than just read about it. In short: Dr. Y.

Key takeaways

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

Reference excerpt

Dr. Y. S. Rao (Yalamanchili Subrahmanyewara Rao) is a professor at the Centre of Studies in Resources Engineering, Indian Institute of Technology Bombay, Mumbai, India. He has been working in the field of microwave remote sensing and land-based applications for more than four decades. His early research focused on the use of Synthetic Aperture Radar (SAR) interferometry for landslides and land deformation monitoring, Digital Elevation Model generation, and snow and glacier monitoring. He has also been actively involved in developing several techniques for soil moisture estimation using passive and active microwave remote sensing data for more than 25 years. His current research involves SAR Polarimetry for crop characterization, classification, and biophysical parameter retrieval using linear and compact-pol SAR data. Apart from applications, he has also contributed to the field of Polarimetric SAR system calibration and software tool development.

Education Rao received the M.Sc. degree in physics from Andhra University, Visakhapatnam, India, in 1982, and the Ph.D. degree in passive microwave remote sensing of soil moisture from the Indian Institute of Technology (IIT) Bombay, Mumbai, India, in 1992.

Professional career He joined the Centre of Studies in Resources Engineering, Indian Institute of Technology Bombay, in 1985, as a senior research assistant and then became a research scientist in 1999. During 2005–2009, he was a senior research scientist and then associate professor from 2009 to 2014. He is currently a professor since 2015. He was engaged in both passive and active microwave remote sensing for several applications viz. soil moisture, flood mapping, and crop inventory mapping. He has participated in several space borne campaigns for collecting synchronous ground-truth data and has experience in handling various data set for several applications of cryosphere, agriculture, soil moisture, and water-resources. His current research interests include application of polarimetry for geophysical parameter retrieval and SAR interferometry for DEM and land deformation. He is actively involved in teaching several courses including Principles of Remote Sensing, Microwave Remote Sensing, Atmospheric Remote Sensing, Advanced Concepts in Polarimetric SAR Data Analysis for M.Tech. and Ph.D. students for the last 12 years. He is also invited for lectures/training programs in several Institutes/Universities. He has conducted numerous training programmes for Indians on SAR and InSAR related activities as a member of task group, and also organized international programmes with the help of DLR Germany, CNES France and University of Cape Town, South Africa. He supervises doctoral and masters research on both PolSAR and InSAR applications. Dr. Rao is the principal and co-principal investigator of numerous projects sponsored by European Space Agency (ESRIN/ESA); German Aerospace Centre (DLR); the Department of Science and Technology (DST), Government of India; Snow & Avalanche Study Estt (SASE), Defence Electronics Application Laboratory (DEAL), Electronics and Radar Development Establishment (LRDE)- Defense Research and Development Organization (DRDO), Government of India; Indian Space Research Organization (ISRO); Society for Applied Microwave Electronics Engineering & Research (SAMEER), Ministry of Electronics & Information Technology, Government of India; and GEOGLAM-JECAM SAR Inter-Comparison Experiment. He has authored more than 100 scientific publications in refereed international-national journals and conference proceedings.

References

Illustrations

Worked examples

Example 1 — a first encounter with Y. S. Rao

Start with the simplest possible case. Write down what Y. S. Rao claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, 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 Y. S. Rao 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 Y. S. Rao 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 Y. S. Rao

In research: Y. S. Rao appears in astronomy 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 Y. S. Rao 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: Y. S. Rao is common in secondary-school and first-year university syllabi. It links to neighbouring topics Academic staff of IIT Bombay, Andhra University alumni, IIT Bombay alumni, so understanding it makes those chapters shorter.
In everyday life: Look for Y. S. Rao 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 Y. S. Rao in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Y. S. Rao 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 Y. S. Rao out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Y. S. Rao in simple terms?

Dr. Y.

Why does Y. S. Rao matter?

Because it connects several astronomy 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 Y. S. Rao?

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 Y. S. Rao.