Space has been a subject of science and human curiosity until now. It was developed and used by public organizations as national projects. In recent years, space has become a business object, with the activities of private companies gaining notable momentum. Development is steadily advancing towards the private use of space as a new field of technological development that will bring innovation to all industries and businesses.
Free high resolution satellite images are images of the Earth acquired by satellites operated by governments or corporations. High resolution satellite imagery is one of the most powerful and important tools for monitoring the Earth. They make it possible to monitor the physical environment (water, air, land, vegetation) and the changing human footprint across the planet. High resolution satellite images are used to measure, identify and track human activities.
The business owner or business project owner needs to pay attention to everything from clarity and resolution to pricing and revisions to help you choose the right solution for your business’s specific needs. Through the Internet, you can find new business opportunities with free high resolution imagesand learn about anything that might be of interest to the company’s decision makers, and ultimately the company will make the right choice of which satellite imaging solution is right for its specific needs.
How many satellites are watching us right now?
Earth observation satellites are divided into geosynchronous equatorial orbits (GEO) and low earth orbits (LEO).
GEO satellites orbit at the same speed as Earth’s rotation and therefore are always above the same point on Earth. To enter such an orbit, they must be very high. Since they maintain their position relative to the Earth’s surface, they can simply transmit their data as they receive it, since they don’t leave the range of the receiving antenna. However, this also means that they are too far away to acquire detailed close-up images of Earth. GEO satellites are used for meteorological monitoring and are considered satellites with low spatial resolution.
In order to obtain clearer images of the Earth’s surface, a series of satellites are installed in LEO (Low Earth Orbit). Its orbital paths travel from pole to pole, providing coverage of the entire surface of the globe, one swath at a time. Most polar orbiting satellites take approximately 90 minutes to return to the same pole. As the Earth rotates under the satellite, the next swath of images will be taken over a different part of the Earth.
To image the entire globe, satellites can take a small number of lower resolution images ‘reduced’ by fewer revolutions, or a larger number of high resolution images enlarged by a greater number of revolutions.
Who uses satellite data?
Global coverage satellite data is widely used to study ecosystems and monitor global events. Researchers use these satellite images to study weather patterns and track climate change, and to measure and predict human impact on the environment. Aggregating long-term data helps scientists assess impacts and develop policies to improve forest cover, crop yields and environmental protection.
Governments use satellite data and information when planning urban development and infrastructure projects. Governments use the data in various political situations to identify country borders, identify military targets and track illegal activities. High resolution satellite imagery plays an important role in assessing and predicting the magnitude of natural disasters and epidemics through the use of algorithms and machine learning models.
Companies use satellite data for a variety of analytical tasks. They use the predictive value of this data to assess future growth and potential investment opportunities. Satellite data on other planets and astronomical bodies are used in space exploration programs.
How should I test data quality
In image processing, sophisticated tools are often used and the data is of high quality. Verification of data quality depends on the intended use. You need to assess whether the data attributes match your usage scenario and whether their accuracy meets your requirements.
Time resolution: Some images are updated every three hours and others are updated daily. You can experiment and select the most appropriate temporal resolution.
Spatial resolution: Very high resolution radar images provide a spectral resolution of less than 5 meters and very high resolution optical images can be below 1 meter. It is always possible to test and select a data acquisition method that is suitable for use.
The quality of the data must be checked and it must be ensured that the attributes of the data are suitable for your use case. You need to ensure that the temporal and spectral resolution is appropriate for your needs.
EOSDA LandViewer
The main important bonus of EOSDA LandViewer is that every registered user can get 10 free images per day. Listed below are other benefits you can get from EOSDA LandViewer:
- Can filter images by area of interest (AOI)
- Viewing and obtaining free samples allowed
- You can get a quote right away and the image itself in just three business days.
- It is possible to process high resolution images in the browser as they are delivered directly to the EOS Platform account. There is no need to FTP and upload high resolution satellite images for further analysis.
The software allows users to get free access to medium resolution images (10 free images per day) and thus serves as a catalog of satellite images obtained from multiple data sources: Sentinel-2 L2A, Landsat 8 OLI + TIRS, Landsat 7 ETM+, Landsat 4-5 MSS, Landsat 4-5 TM, CBERS-4 MUX, CBERS-4 WFI, CBERS-4 PAN5, CBERS-4 PAN 10, and CBERS-4 NAIP. Users can also acquire high and very high resolution images (up to 0.4m per pixel) taken from satellite constellations including KOMPSAT-2, KOMPSAT-3A, KOMPSAT-3, SuperView, Gaofen 1, Gaofen 2, Ziyuan- 3, and TripleSat.
What are common problems with satellite imagery?
Accuracy and timeliness of the data are the biggest challenges. These are amplified by bandwidth restrictions on data links. There is also the problem of data resolution, which depends on the research methods, and it must be ensured that the supplier can guarantee the expected level.
Conclusion
Satellites and the accuracy of their data are the engine of today’s progress and ease of decision-making. An enormous number of hours can be saved by tackling the root cause of the world’s emerging problems. They are high resolution satellite images that help to see and cover the entire problem and help to find solutions.
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