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NV5 Geospatial Blog

Each month, NV5 Geospatial posts new blog content across a variety of categories. Browse our latest posts below to learn about important geospatial information or use the search bar to find a specific topic or author. Stay informed of the latest blog posts, events, and technologies by joining our email list!



Not All Supernovae Are Created Equal: Rethinking the Universe’s Measuring Tools

Not All Supernovae Are Created Equal: Rethinking the Universe’s Measuring Tools

6/3/2025

Rethinking the Reliability of Type 1a Supernovae   How do astronomers measure the universe? It all starts with distance. From gauging the size of a galaxy to calculating how fast the universe is expanding, measuring cosmic distances is essential to understanding everything in the sky. For nearby stars, astronomers use... Read More >

Using LLMs To Research Remote Sensing Software: Helpful, but Incomplete

Using LLMs To Research Remote Sensing Software: Helpful, but Incomplete

5/26/2025

Whether you’re new to remote sensing or a seasoned expert, there is no doubt that large language models (LLMs) like OpenAI’s ChatGPT or Google’s Gemini can be incredibly useful in many aspects of research. From exploring the electromagnetic spectrum to creating object detection models using the latest deep learning... Read More >

From Image to Insight: How GEOINT Automation Is Changing the Speed of Decision-Making

From Image to Insight: How GEOINT Automation Is Changing the Speed of Decision-Making

4/28/2025

When every second counts, the ability to process geospatial data rapidly and accurately isn’t just helpful, it’s critical. Geospatial Intelligence (GEOINT) has always played a pivotal role in defense, security, and disaster response. But in high-tempo operations, traditional workflows are no longer fast enough. Analysts are... Read More >

Thermal Infrared Echoes: Illuminating the Last Gasp of a Dying Star

Thermal Infrared Echoes: Illuminating the Last Gasp of a Dying Star

4/24/2025

This blog was written by Eli Dwek, Emeritus, NASA Goddard Space Flight Center, Greenbelt, MD and Research Fellow, Center for Astrophysics, Harvard & Smithsonian, Cambridge, MA. It is the fifth blog in a series showcasing our IDL® Fellows program which supports passionate retired IDL users who may need support to continue their work... Read More >

A New Era of Hyperspectral Imaging with ENVI® and Wyvern’s Open Data Program

A New Era of Hyperspectral Imaging with ENVI® and Wyvern’s Open Data Program

2/25/2025

This blog was written in collaboration with Adam O’Connor from Wyvern.   As hyperspectral imaging (HSI) continues to grow in importance, access to high-quality satellite data is key to unlocking new insights in environmental monitoring, agriculture, forestry, mining, security, energy infrastructure management, and more.... Read More >

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Sentinel-1 SAR Images Show Buildup of Marine Traffic at Suez Canal

Megan Gallagher

Marine traffic has come to a standstill in Egypt’s Suez Canal, one of the busiest and most important waterways in the world. The Ever Given, a 224,000 ton vessel that is as long as the Empire State Building, ran aground on March 23, 2021 after being caught in 40-knot winds and a sandstorm that caused poor visibility. Currently eight tugboats are working to free the large container ship.

The Sentinel-1 series of images above gives a clear idea of how the disruption of one of the main marine communication lines can lead to significant economic problems.

The images above were captured by the Sentinel-1  sensors (data courtesy EU/ESA) and processed using ENVI® SARscape®. The ability to observe theearth in any atmospheric condition as well as to shoot the same geographical area with the high temporal frequency, provided by the Sentinel-1 A and B sensors, not only allows us to capture the event in near-real time, but also to observe its evolution. These images show normal traffic in the Canal prior to the blockage, as well as the ever- increasing traffic jam to access the passageway that accounts for approximately 30 percent of container ship traffic globally each day.

Using ENVI SARscape and ENVI SARscape Analytics, ships can be distinguished on water due to their signal response with SAR data. SAR show ships as very bright points and areas as compared to the dark background of water. This is because of how the energy gets reflected. With this analysis, we can easily detect, count and track ships. In this case, we can see just how many ships are backed up waiting for passage through the Suez Canal. With Sentinel-1 15m ground range data we can even see the orientation of the Ever Given as it is lodged in the canal. 

Data processed by sarmap SA.

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