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Data used: the Amsterdam dataset
Published in Rémi Cresson, Deep Learning for Remote Sensing Images with Open Source Software, 2020
The Spot-7 product is composed of one multispectral image (6.0m physical spacing, Bands: red, green, blue, near infra-red) and one panchromatic channel (1.5m physical spacing). The encoding is 12bits. The Spot image can be freely downloaded from the Airbus, Defense & Space sample imagery web page1. To download the product, follow these steps: Go to the ADS sample imagery web page,In the search field, enter amsterdam (next to the magnifying icon),Click on the Search button,Select the available Spot-7 product named SPOT 7 - Amsterdam, Netherlands.
Remote Sensing Monitoring of Marine Oil Spills
Published in Lin Mu, Lizhe Wang, Jining Yan, Information Engineering of Emergency Treatment for Marine Oil Spill Accidents, 2019
Lin Mu, Lizhe Wang, Jining Yan
SPOT series. Five SPOT satellites have been launched since France launched the first SPOT satellite in February 1986, and SPOT 1/2/4/5 are currently in operation. SPOT satellites run on a sun-synchronous quasi-recursive orbit with an altitude of 832 km and an inclination of 98.7 degrees. The local time when the satellites pass over the equator is 10:30 a.m. and the visit cycle is 26 days. In front of each detector of the SPOT, there is a swingable reflector, which can be used to conduct tilt observation of the earth within a certain angle through reflector swinging, shortening the revisit cycle. The nominal revisit cycle of the SPOT is 26 days. Now, four satellites with the same orbital parameters are running simultaneously and each satellite can conduct tile observation. SPOT can actually repeat observations of the same spot within one to two days, which is of great significance in dealing with emergencies such as natural or man-made disasters.
Land Degradation Assessment and Monitoring of Drylands
Published in Prasad S. Thenkabail, Remote Sensing Handbook, 2015
Marion Stellmes, Ruth Sonnenschein, Achim Röder, Thomas Udelhoven, Stefan Sommer, Joachim Hill
The Satellite Pour l’Observation de la Terre (SPOT) satellites operated by Centre National d’Études Spatiales (CNES) provide multispectral data since 1986 with a spatial resolution of 6 m × 6 m up to 20 m × 20 m with a revisit rate of 26 days. The SPOT system is operated commercially, which offers the possibility to prioritize the observation of specific areas. Whereas the Landsat sensors are restricted to Nadir acquisition, the SPOT sensors are able to incline the sensor allowing for the acquisition of data for specific areas more often than these 26 days. At the same time, this means that other areas are not recorded on a regular basis.
Predicted Heat Flux Performance of Actively Cooled Tungsten-Armored Graphitic Foam Monoblocks
Published in Fusion Science and Technology, 2021
Dennis Youchison, James Klett, Brian Williams, Douglas Wolfe
High-heat-flux testing will use the 60-kW, EB-60 electron beam system at the Applied Research Laboratory (ARL) of The Pennsylvania State University. The mock-up will be cooled with available 10 m/s, 0.7 MPa water with a 22°C inlet temperature, but the maximum heat flux will be limited to 20 MW/m2. In addition to the thermocouples, calibrated infrared thermography and spot pyrometry will be used to characterize the heated surface. Real-time water calorimetry will be used to ascertain the absorbed steady-state power and infer the heat flux during testing. The test data will be used to validate computational fluid dynamics (CFD) models under these conditions and ascertain the fatigue behavior and failure mode of the coatings including melting, deformation, cracking, and delamination, and the mock-up regarding tube detachment and ablation.
Improved auto-extrinsic calibration between stereo vision camera and laser range finder
Published in International Journal of Image and Data Fusion, 2021
Some other calibration methods for camera and LRF are based on auxiliary sensors such as inertial measurement unit (IMU). Aliakbarpour et al. (2009) proposed a method for estimating extrinsic calibration parameters between a 3D LRF and a stereo camera with the aid of IMU data and a visible laser bright spot by estimating Euclidean 3D transformation between them. Nunez et al. (2009) also used an IMU to construct geometric constraints between a LIDAR and a camera system for calculating the transformation (rotation and translation) by observing the resulting motion of the sensors. Liu et al. (2019) provided a calibration method that utilises an infrared camera to detect laser spot in the camera image. The extrinsic parameters are then estimated by establishing relationship between visible light camera and infrared camera.
A Review of Morton Effect: From Theory to Industrial Practice
Published in Tribology Transactions, 2018
The orbit size influences how film thickness varies circumferentially. Take the circular orbit, for example, as illustrated in Fig. 4, where the phase lag between the hot spot and the high spot is neglected. Figures 4a and 4b show hot spots and cold spots induced by circular orbits of radius and radius , respectively, where is smaller than . The following relationships hold:where and represent the film thickness at the hot spot and cold spot, respectively; is the static eccentricity; and is the journal radius. From Eq. [1], the differential temperature amplitudes induced by the two orbits hold the following relationship (see Appendix for derivation).