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IEEE GRSS Student Branch Chapter - University of Moratuwa

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13/08/2026

🛰️ Something exciting is on the horizon!

The IEEE GRSS Student Branch Chapter of the University of Moratuwa proudly presents GeoPulse - an upcoming article competition created to inspire innovative thinking in Remote Sensing and Geographic Information Systems (GIS).🌏📡

From satellite imagery and Earth observation to spatial analysis, environmental monitoring, disaster management, smart cities, agriculture and natural-resource exploration, GeoPulse offers a platform to transform your geospatial ideas into meaningful written contributions. ✨

Observe the Earth. Discover new patterns. Connect information. Imagine better solutions. Then, turn your ideas into words that can inform, inspire and create an impact.🌏🖋️

Are you ready to explore the possibilities of geospatial technology and share your perspective?💡

GeoPulse is coming soon. Stay tuned for the official launch, competition guidelines and submission details!

12/08/2026

A proud moment for the IEEE GRSS Student Branch Chapter of the University of Moratuwa! 🌍🛰️

Heartiest congratulations to Bhanuka Ranaweera on presenting his research at IGARSS 2026, proudly representing our Student Branch Chapter on an international platform. ✨🤍

📌 Research Topic:
Geospatial Modeling of Ecological Connectivity: A Least-Cost Path Optimization for the Minneriya–Wasgamuwa Elephant Corridor, Sri Lanka 📡🛰️

Your achievement reflects your dedication and passion for advancing geoscience, remote sensing and environmental conservation. 💫

See you there! 🎉

10/08/2026

Every powerful change begins with an idea and some ideas have the potential to map the future. 🌍✨

A new space for imagination, innovation, and fresh perspectives is coming your way. 📢

Get ready to explore the possibilities of Remote Sensing and GIS, where technology meets creativity to shape a smarter and more sustainable world.♻️💡

Something exciting is on the horizon. 🛰️
Stay curious. Stay inspired. *Stay tuned for GeoPulse!*

04/08/2026

🌍 Fact of the Week | The Electromagnetic Spectrum

Remote sensing begins with understanding the electromagnetic spectrum — the full range of electromagnetic energy traveling through space and the atmosphere.

While the human eye can only detect a small portion called visible light, satellites use many other wavelengths such as infrared, microwave, and radio waves to study Earth’s surface and atmosphere.👀

Each wavelength interacts with materials differently, creating unique spectral signatures that help identify vegetation, water, minerals, land changes, and environmental conditions.🌀

From mapping forests to monitoring climate change, the electromagnetic spectrum allows satellites to reveal details about our planet that are invisible to the naked eye. 🌎🛰️

28/07/2026

🛰️ Fact of the Week | Can You Spot the Resolution?

Spatial resolution determines the size of the smallest feature a satellite image can represent. Images with finer spatial resolution reveal more detail, making it easier to distinguish buildings, roads, individual trees, and other small features. 🗻🌧️

Here you're looking at the same location captured at different spatial resolutions.
⁉️Can you identify which image has the higher resolution and explain what visual clues led you to your answer.

💡 Hint: Sharper edges and more visible details don't always mean the image is the most suitable. Higher spatial resolution often comes with trade-offs such as smaller coverage, larger data volumes, and longer processing times. The ideal resolution depends on the purpose of the analysis.

🔍 Can you estimate the pixel size too?
Is it 30 m, 10 m, or 0.5 m?

Drop your answer in the comments, and we'll reveal the correct answer tomorrow! 😃

📸 : : USGS Landsat Spatial Resolution Comparison(From NASA)

21/07/2026

🌍 Fact of the Week

🛰️ One satellite image actually has four different resolutions and each tells a different story.

📌 Spatial Resolution - "How small can you see?"
Measures the size of one pixel on the ground (e.g., 30 m vs. 0.3 m). Higher spatial resolution reveals finer details like individual buildings or vehicles.

🎨 Spectral Resolution - "How many colors can you detect?"
Refers to the number and width of wavelength bands a sensor captures. More spectral bands help distinguish materials that look similar to the human eye, such as healthy vegetation, minerals, or water quality.

⏱️ Temporal Resolution - "How often do you revisit?"
Indicates how frequently a satellite images the same location. High temporal resolution is essential for monitoring floods, wildfires, crop growth, and environmental changes.

📡 Radiometric Resolution - "How sensitive is the sensor?"
Represents the sensor's ability to detect subtle differences in reflected energy. A higher bit depth (e.g., 12-bit vs. 8-bit) capture

📸 : NASA Earthdata. Data Basics: Remote Sensing Resolution. National Aeronautics and Space Administration.

# Resolutions

14/07/2026

🛰️ Fact of the Week | Satellite Orbits Matter?

Not all satellites orbit Earth at the same altitude. The orbit a satellite follows determines what it can observe, how frequently it revisits an area. 🌏

Here are the three main classes of Earth orbits:

🔹 Low Earth Orbit (LEO) | 160–2,000 km
Closest to Earth, LEO satellites provide high-resolution imagery, making them ideal for Earth observation, environmental monitoring, disaster response, and scientific research.

🔹 Medium Earth Orbit (MEO) | 2,000–35,500 km
Offers wider coverage and is primarily used by global navigation satellite systems, enabling accurate positioning, navigation, and timing services.

🔹 Geostationary Orbit (GEO) | 35,786 km
A satellite in GEO matches Earth's rotation and remains fixed over the same location. This continuous view makes it essential for weather forecasting, telecommunications, and broadcasting.

📸 : Data Basics: Orbits (NASA Earth Data)

27/05/2026

GIS Fact of the Week!

Why Every Raster Image Looks “Blocky” When You Zoom In ❓

In GIS, raster data (like satellite images and DEMs) is made up of tiny squares called pixels.
Each pixel stores a single value - such as color, elevation, or temperature. 🧮

🌍The important concept is called spatial resolution:

A 10 m resolution image means 1 pixel = 10 m × 10 m on the ground.
Higher resolution = more detail.
Lower resolution = larger pixels and less detail.

That’s why satellite images become blurry or blocky when you zoom too far - you are actually seeing the individual pixels.🏙️

💡Real Example !

Sentinel-2 imagery has 10 m resolution for visible bands.
Landsat 8 visible bands have 30 m resolution.

So, Sentinel-2 can capture finer ground details compared to Landsat 8.

💡Simple Analogy!

Think of raster data like a mosaic made of tiles:

Smaller tiles → clearer picture
Bigger tiles → less detail
Why This Matters in GIS

🖊️Spatial resolution affects:

Land cover mapping
Urban analysis
Change detection
Precision in measurement

$🌍 Beyond What We SeeThe human eye sees only a fraction of reality.Satellites, however, can detect what remains invisible...$

18/05/2026

🌍 Beyond What We See

The human eye sees only a fraction of reality.
Satellites, however, can detect what remains invisible to us - from vegetation stress and soil moisture to hidden environmental changes. 🍃

Through remote sensing, we are not just observing Earth; we are understanding it in ways never before possible. 💫

Sometimes, the most important insights are the ones we cannot see. 🌐

📸 : Illustration of the integration of Sentinel-1 radar satellites, CubeSats, and drone-based precision mapping to monitor Earth’s resources and vegetation using multi-band signal pe*******on. (Courtesy from Google)

13/05/2026

🔍 Beyond What We See…

More than 70% of our planet is covered by oceans—yet much of the seafloor remains less explored than the Moon or Mars. 🌕

Thanks to advancements in Synthetic Aperture Radar (SAR) and satellite altimetry, we can now map underwater landscapes from space. These technologies help scientists detect hidden features like seamounts, deep-sea trenches, and tectonic structures without ever going beneath the surface. 🏔️

This is the power of geoscience and remote sensing: revealing the unseen and expanding our understanding of Earth in ways once thought impossible.🛰️

🌊 From space to seafloor, innovation continues to bridge the gaps in exploration.

📸pc : Image: David Sandwell, Scripps Institution of Oceanography, UC San Diego

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