High-Level Project Summary
Despite cloudy conditions, darkness, rain or even snow is not a big deal to "SAR" technology and what makes it so special that you even get a high quality pictures of Earths surface. Well, it's optical sensors is totally different from other satellites optical sensors! It is all about its wavelengths which are often into bands such as: (x, c, l, p)bands. It include a lot structure as polarization: has two types which are horizontal and vertical. And Interferometric: uses the phase difference between two coherent synthetic aperture radar images of a scene to measure height. SAR is one of the impressive technology that needs to be known all over the world so people can see the world improving.
Link to Project "Demo"
Link to Final Project
Detailed Project Description
Our project is to create a 3 to 5 minute video for the public, and it is in fact a video that contains information and simplified data for the Sar technology and what are its data and its potential. Not only knowing that, but also it facilitate the scientific content about how the does SAR works. In addition of making the content interesting for all people in all ages. We make the video looks simple, we also aspire to make it very interesting to others as we never give scientific content to a normal technology like Sar technology, but the normal is to present the idea in a familiar way. What we also aspire to is that we give each content that presents the idea and the ideal and the appropriate presentation for it.
We've used a video maker app to montage.
Space Agency Data
- NASA Earth Data (Open Access for Open Science):
· DATA: -What is Synthetic Aperture Radar?
There is a directly relation between the spatial resolution of radar data andthe ratio of the sensor wavelength to the length of the sensor's antenna. And for the wavelength that is given there is a theory tells that the longer the antenna, the higher the spatial resolution. Then, when a satellite in space its wavelength 5cm – as it’s in (C-band radar) – leads to make a spatial resolution from 10 m, you would need a radar antenna about 4,250 m long.
-The Role of Frequency and Wavelength
Optical sensors such as - Landsat's Operational Land Imager (OLI)
-Sentinel-2's Multispectral Instrument (MSI)
collect data in the visible, near-infrared, and short-wave infrared portions of the electromagnetic spectrum. Radar sensors utilize longer wavelengths at the centimeter to meter scale, which gives it special properties, such as the ability to see through clouds (view electromagnetic spectrum to the right). The different wavelengths of SAR are often referred to as bands, with letter designations such as X, C, L, and P. We will show you the band and its associated frequency, wavelength, and the application typical for that band.
X 8–12 GHz 3.8–2.4 cm High resolution SAR (urban monitoring,; ice and snow, little penetration into vegetation cover; fast coherence decay in vegetated areas)
C 4–8 GHz 7.5–3.8 cm SAR Workhorse (global mapping; change detection; monitoring of areas with low to moderate penetration; higher coherence); ice, ocean maritime navigation
L 1–2 GHz 30–15 cm Medium resolution SAR (geophysical monitoring; biomass and vegetation mapping; high penetration, InSAR)
P 0.3–1 GHz 100–30 cm Biomass. First p-band spaceborne SAR will be launched ~2020; vegetation mapping and assessment. Experimental SAR.
Interferometry: Synthetic aperture radar (SAR) interferometry (InSAR) detects motion or elevation by comparing radar signals from two or more images of the same scene. The images are taken at different times from the same vantage point in space. SAR interferometry is often used to detect surface changes (for use in seismology, for example) or to generate digital elevation maps.
Polarization: By adjusting the analyzed polarization in both the transmit and receive lines, radar may collect signals in various polarizations. The orientation of the plane in which the transmitted electromagnetic wave oscillates is referred to as polarization. SAR sensors normally transmit linearly polarized signals, despite the fact that the orientation might be at any angle. The symbol H denotes horizontal polarization, while the letter V denotes vertical polarization.
Radar sensors have the advantage of being able to precisely regulate signal polarization on both transmit and receive. A VH indicates signals that are transmitted in vertical (V) polarization and received in horizontal (H) polarization. Alternatively, a signal could be used.
-We used that data and information for our scientific content, so we included many images and arranged the scientific content on those platforms and grouped them so that we made a video with this scientific content in an interesting and in useful way that helps the public to understand it easily.
-it inspire us in how to make a scientific content with an amazing way.
Hackathon Journey
Although the hackathon period was very changeable, but we managed to deal with every hard moment we've been through. In addition, the experience we had in solving the problem of the challenge in this project was the most effective thing that can make a change in an ordinary work to a great one, which is the "Teamwork".
We learned from each other a lot that made us did that great work as each member of the team share with all of his/her energy, effort, thoughts and skills moreover we were all one.
We chose this project exactly because it was the most suitable one for exerting efforts from each one. Also, we thought that if we had had more time we would have used every minute to this project for sure. We learned from this short time by supporting each other in everything even if any of our team members made a small thing to the project and the team. Finally we all want to thanks NASA space agency and NASA Space App for giving us this opportunity to find out our skills and how hard we can deal with and to get an effective ways and creative ones to solve problems.
References
1. Server Global - Synthetic Aperture Radar ( YouTube Video link: ( https://www.youtube.com/watch?v=em41MxplcDc&t= )
2. What is Synthetic Aperture Radar? – NASA EarthData https://earthdata.nasa.gov/learn/backgrounders/what-is-sar
3. NASA app space challenge: The Background of SAR
4. The SAR handbook- Comprehensive Methodologies for Forest Monitoring and Biomass Estimation.
5. Chapter: 2 SAR Issues - Development and Application of Small Spaceborne Synthetic Aperture Radars (1998)
6. Woodhouse, I. H., 2006, Introduction to Microwave Remote Sensing, Boca Raton, FL, CRC Press, Taylor & Francis Group
7. NASA Applied Remote Sensing Training (ARSET) Program Courses: Introduction to Synthetic Aperture Radar (available in English and Spanish)
Tags
#SAR #the_atmospheric_penterator
Global Judging
This project has been submitted for consideration during the Judging process.