Aster Flow Meter Catalogue Pdf

[Edelmar Easley]

Ourdigital flow meter necessarily has a flow sensor with a magnetic multi-bladed spinning rotor (impeller) mounted inside at right angles to the flow. The rotational speed of the impeller is proportional to the velocity of fluid. The pulse generated is transmitted and converted into a volumetric measurement. Our digital flow meters are individually calibrated to give reliable flow measurement.

Established in the year 2016 at Ahmedabad (Gujarat, India), we Aris Engineers are a leading manufacturer and trader of a remarkable range of Control Panel, SS Temperature Scanner, Digital Temperature Indicator, etc.

Our digital flow meter necessarily has a flow sensor with a magnetic multi-bladed spinning rotor (impeller) mounted inside at right angles to the flow. The rotational speed of the impeller is proportional to the velocity of fluid.

The pulse generated is transmitted and converted into a volumetric measurement. Our digital flow meters are individually calibrated to give reliable flow measurement.

Relay gets energized after a fixed quantity of water passes through the sensor. The batcher has an auto reset, manual reset and dual relay operation facility. Batch quantity counts downwards till zero value

The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) is a Japanese remote sensing instrument onboard the Terra satellite launched by NASA in 1999. It has been collecting data since February 2000.

ASTER provides high-resolution images of Earth in 14 different bands of the electromagnetic spectrum, ranging from visible to thermal infrared light. The resolution of images ranges between 15 and 90 meters. ASTER data is used to create detailed maps of surface temperature of land, emissivity, reflectance, and elevation.[1]

In April 2008, the SWIR detectors of ASTER began malfunctioning and were publicly declared non-operational by NASA in January 2009. All SWIR data collected after 1 April 2008 has been marked as unusable.[2]

As of 2 April 2016, the entire catalogue of ASTER image data became publicly available online at no cost.[4] It can be downloaded with a free registered account from either NASA's Earth Data Search delivery system[5] or from the USGS Earth Explorer delivery system.[6]

On 29 June 2009, the Global Digital Elevation Model (GDEM) was released to the public.[8][9]A joint operation between NASA and Japan's Ministry of Economy, Trade and Industry (METI), the Global Digital Elevation Model is the most complete mapping of the earth ever made, covering 99% of its surface.[10]The previous most comprehensive map, NASA's Shuttle Radar Topography Mission, covered approximately 80% of the Earth's surface,[11] with a global resolution of 90 meters,[12] and a resolution of 30 meters over the USA.The GDEM covers the planet from 83 degrees North to 83 degrees South (surpassing SRTM's coverage of 56 S to 60 N), becoming the first earth mapping system that provides comprehensive coverage of the polar regions.[11] It was created by compiling 1.3 million VNIR images taken by ASTER using single-pass[13] stereoscopic correlation techniques,[8] with terrain elevation measurements taken globally at 30-meter (98 ft) intervals.[10]

Despite the high nominal resolution, however, some reviewers have commented that the true resolution is considerably lower, and not as good as that of SRTM data, and serious artifacts are present.[14][15]

During October 2011, version 2 of Global Digital Elevation Model was publicly released.[17] This is considered an improvement upon version 1. These improvements include increased horizontal and vertical accuracy,[18] better horizontal resolution, reduced presence of artifacts, and more realistic values over water bodies.[3] However, one reviewer still regards the Aster version 2 dataset, although showing 'a considerable improvement in the effective level of detail', to still be regarded as 'experimental or research grade' due to presence of artefacts.[19]A 2014 study[18] showed that over rugged mountainous terrain the ASTER version 2 data set can be a more accurate representation of the ground than the SRTM elevation model.

The improved GDEM V3 adds additional stereo-pairs, improving coverage and reducing the occurrence of artifacts. The refined production algorithm provides improved spatial resolution, increased horizontal and vertical accuracy. The ASTER GDEM V3 maintains the GeoTIFF format and the same gridding and tile structure as V1 and V2, with 30-meter postings and 1 x 1 degree tiles. Version 3 is claimed to have significant improvements over the previous release. Automated processing of 2.3 million scenes from the ASTER archive was used to create the ASTER GDEM, which included stereo-correlation to create individual scene-based ASTER DEMs, masking to remove cloudy pixels, stacking all cloud-screened DEMs, removing residual bad values and outliers, averaging selected data to create final pixel values.

The ASTER Global Digital Elevation Model (ASTER GDEM) is a joint product developed and made available to the public by the Ministry of Economy, Trade, and Industry (METI) of Japan and the United States National Aeronautics and Space Administration (NASA). It is generated from data collected from the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER), a spaceborne earth observing optical instrument.The ASTER GDEM is the only DEM that covers the entire land surface of the Earth at high resolution. Version 2 of the ASTER GDEM is developed, employing an advanced algorithm to improve GDEM resolution and elevation accuracy and reprocessing a total of 1.5 million scene data including additional 250,000 scenes acquired after the previous release. Accuracy of this latest version is validated by the collaborate effort between Japan and the United States, which shows significant improvements over Version 1

The Shuttle Radar Topography Mission (SRTM) was flown aboard the space shuttle Endeavour February 11-22, 2000. The National Aeronautics and Space Administration (NASA) and the National Geospatial-Intelligence Agency (NGA) participated in an international project to acquire radar data which were used to create the first near-global set of land elevations.Endeavour orbited Earth 16 times each day during the 11-day mission, completing 176 orbits. SRTM successfully collected radar data over 80% of the Earth's land surface between 60 north and 56 south latitude with data points posted every 1 arc-second (approximately 30 meters).SRTM 1 Arc-Second Global elevation data offer worldwide coverage of void filled data at a resolution of 1 arc-second (30 meters) and provide open distribution of this high-resolution global data set. Some tiles may still contain voids. Users should check the coverage map in EarthExplorer to verify if their area of interest is available. Please note that tiles above 50 north and below 50 south latitude are sampled at a resolution of 2 arc-second by 1 arc-second.

The Shuttle Radar Topography Mission (SRTM) was flown aboard the space shuttle Endeavour February 11-22, 2000. The National Aeronautics and Space Administration (NASA) and the National Geospatial-Intelligence Agency (NGA) participated in an international project to acquire radar data which were used to create the first near-global set of land elevations.Endeavour orbited Earth 16 times each day during the 11-day mission, completing 176 orbits. SRTM successfully collected radar data over 80% of the Earth's land surface between 60 north and 56 south latitude with data points posted every 1 arc-second (approximately 30 meters).Andy Jarvis and Edward Guevara of the CIAT Agroecosystems Resilience project, Hannes Isaak Reuter (JRC-IES-LMNH) and Andy Nelson (JRC-IES-GEM) have further processed the original DEMs to fill in these no-data voids. This involved the production of vector contours and points, and the re-interpolation of these derived contours back into a raster DEM. These interpolated DEM values are then used to fill in the original no-data holes within the SRTM data. Resampled data (250m, 500m, and 1 km): (Password: ThanksCSI!)CitationJarvis, A., H.I. Reuter, A. Nelson, E. Guevara, 2008, Hole-filled SRTM for the globe Version 4, available from the CGIAR-CSI SRTM 90m Database ( ).

The Global Multi-resolution Terrain Elevation Data 2010 (GMTED2010) provides a new level of detail in global topographic data. Previously, the best available global DEM was GTOPO30 with a horizontal grid spacing of 30 arc-seconds. The GMTED2010 product suite contains seven new raster elevation products for each of the 30-, 15-, and 7.5-arc-second spatial resolutions and incorporates the current best available global elevation data. The new elevation products have been produced using the following aggregation methods: minimum elevation, maximum elevation, mean elevation, median elevation, standard deviation of elevation, systematic subsample, and breakline emphasis.

The Japan Aerospace Exploration Agency (JAXA) releases the global digital surface model (DSM) dataset with a horizontal resolution of approx. 30-meter mesh (1 arcsec) free of charge. The dataset has been compiled with images acquired by the Advanced Land Observing Satellite "DAICHI" (ALOS).The dataset is published based on the DSM dataset (5-meter mesh version) of the "World 3D Topographic Data", which is the most precise global-scale elevation data at this time, and its elevation precision is also at a world-leading level as a 30-meter mesh version. This dataset is expected to be useful for scientific research, education, as well as the private service sector that uses geospatial information. April 2016: Version 1 covering Japan and a part of individual continent released (Total 7,278 tiles)Next release expanding area is planned around end of May 2016.

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