Sigma-SAR Institute, a provider of satellite data analysis-related solutions, released the "Sigma-SAR Cloud Platform Ver. 1.1", a cloud service for analyzing Synthetic Aperture Radar (SAR) data, on August 31, 2020.
Sigma-SAR Cloud Platform is a cloud service that analyzes observation data from earth observation satellites to detect the state and change of the earth's surface. We are pleased to announce the renewed version 1.1 with expanded support satellites and additional functions.
Sigma-SAR Cloud Platform specializes in data observed by the Synthetic Aperture Radar (SAR) among earth observation satellite data. This advanced sensor can monitor 24 hours a day and 365 days a year, regardless of the weather conditions. The sophisticated analysis core engine "Sigma-SAR" outputs highly detailed and precise results.
Sigma-SAR Cloud Platform is a subscription type of cloud service. All operations, such as uploading the satellite data to be analyzed, setting analysis parameters, and viewing and downloading analysis results, can be done with your web browser. You can easily use this service as it only charges for the period, number of executions, and storage capacity required for your analysis work. You will need to purchase the satellite data separately from your respective satellite data provider. We also offer advice on data selection and proxy purchasing as an optional service.
Various subscription plans are available depending on the number of analysis runs, the amount of satellite data and cloud storage space for analysis results, and the period of use (monthly, yearly, etc.). Please contact us for details.
Unlike optical satellites that use sunlight for their observations, SAR satellites emit radio waves to the ground surface, and use the reflected waves (scattered waves) to obtain information on the ground surface. For example, the time it takes for the reflected waves to return and the Doppler frequency can be used to determine the reflection point's location. The intensity of the reflected waves can be used to determine the structure, characteristics, and roughness of the ground surface. The analysis image is a monochrome shading of the intensity of the reflected waves.
The analysis results of SAR data provide useful information that supports our daily life in a wide range of fields, including monitoring infrastructures such as roads, bridges, and buildings and the management of agricultural growth and disaster prevention and disaster mitigation for earthquakes and landslides. In general, however, imaging and analysis of SAR data require advanced and specialized analysis software, and interpretation and analysis of SAR results require a high level of expertise. Therefore, a paradigm shift in the utilization of SAR data is desired, and innovative applications have been expected for a long time.
Therefore, we developed a cloud service that allows you to analyze data with simple operations, specialized in SAR data, which is considered to be one of the most difficult types of earth observation satellite data to handle. Our cloud performs the CPU-consuming analysis processing smoothly and reduces the cost and time to manages the massive satellite data and output results of the analysis so that you can easily analyze SAR data and view the results with your PC or smartphone.
The era of spending time analyzing SAR data is over. Spend more time examining the results of the analysis.
With Sigma-SAR Cloud Platform, you can easily analyze SAR data without any high-performance workstations/PCs, expensive software, nor large storage systems to manage data files. Now, you can concentrate your resources on analyzing various SAR images output from the SSCP.
Also, since Sigma-SAR Cloud Platform is a subscription type of service, you can start using it on a monthly basis by selecting the disk space and the number of times of analysis according to your purpose.
Some preset allows you to analyze data with minimal settings. If you need advanced analysis, you can make a separate analysis order (optional service).
Once you've uploaded your SAR data files to the cloud server in advance, you can submit analysis jobs and view the results from your smartphone or tablet device.
We can image various SAR data and perform higher-order processing (ortho-transform and slope correction).
We can analyze data from the world's major SAR satellites.
Amplitude Image Generation - capturing surface features
SAR data imaging. We use our noise reduction technology to create high-precision, high-definition images with amplitude. It can create images that perfectly match the topographic map by ortho-correction using various DEMs. It also images with less variation in brightness due to the unevenness of the terrain by slope correction. These can be used to extract changes in land use.
Interferometric analysis - Visualizing the movement of the ground surface
"Interferometric Analysis" is performed on two periods of SAR data to produce an interferometric image that represents the surface displacement that occurred between the two periods. The interferometric analysis of long-term data periodically produces an interferogram that shows signs of minute crustal deformation.
Time series analysis - Visualizing time-series changes in surface features
Amplitude images are generated from multiple periods of SAR data, and a group of image files is generated by converting and aligning observation data from the same region and multiple periods into an image. In this way, it is possible to find the location of a change in amplitude in a time series.
Sigma-SAR Cloud Platform supports data analysis of many domestic and international SAR sensors. In this renewal, we are pleased to announce to start supporting data analysis of Japan's first commercial small SAR satellite "ASNARO-2" (NEC/Ministry of Economy, Trade and Industry).
Analysis Example of ASNARO-2: Amplitude Image around Yokohama Port
In the analysis menu of SSCP (Amplitude Image Generation), SAR data can be imaged.
The most significant features of the Sigma-SAR, the core engine for analysis, are removing unwanted noise which is unavoidable in radar observations, slope correction, ortho-rectification. These help in getting denser and higher definition images.
The above example analysis captures the features of the Port of Yokohama in detail, including artificial structures such as bridges and roads, ship shadows, and vehicles awaiting shipment.
Analysis Example of ASNARO-2: Amplitude and interferometric Images before and after the Northern Osaka Earthquake
In the "Interferometric Analysis" menu of Sigma-SAR Cloud Platform, we can detect the ground surface movement that occurred between two periods.
In addition to the intensity of the radio waves reflected from the ground surface and returned to the observation satellite, radar observations also measure the phase. From the difference in phase, we can get information on the displacement of the ground between the two periods of time. Interferometric images are visualized by assigning colors to the amount of displacement on the ground surface.
A big earthquake of seismic intensity six lower hit the northern Osaka Prefecture at 7:58:39 on June 18, 2018. "Interferometric Image 1" is the result of interferometric analysis from July 31 to August 14, 2018, and "interferometric Image 2" is the result from August 14 to August 28, 2018.
"Interference Image 1" shows the possibility that the after-effect variability caused by the June 18 earthquake is in progress, although weather disturbances and ionospheric effects are also possible. In the "Interference Image 2" after two weeks, the fluctuation shows a calming down trend. Analysis of a longer period with more data will improve the accuracy of the analysis.
We welcome subscription applications, trial and demo requests, collaboration proposals, and other inquiries for Sigma-SAR Cloud Platform.