scholarly journals Initial Efforts Toward Coordinated Community Data Processing to Accelerate the Growth of Publicly Available Bathymetric Data Products

2020 ◽  
Author(s):  
Vicki Ferrini ◽  
John Morton ◽  
Lindsay Gee ◽  
Erin Heffron ◽  
Hayley Drennon ◽  
...  
Keyword(s):  
Data Processing ◽  
Bathymetric Data ◽  
Data Products ◽  
Community Data

scholarly journals SPATIAL OUTLIERS DETECTION ALGORITHM (SODA) APPLIED TO MULTIBEAM BATHYMETRIC DATA PROCESSING

2019 ◽  
Vol 25 (4) ◽  
Author(s):  
Italo Oliveira Ferreira ◽  
Afonso de Paula dos Santos ◽  
Júlio César de Oliveira ◽  
Nilcilene das Graças Medeiros ◽  
Paulo César Emiliano
Keyword(s):  
Data Processing ◽  
Detection Algorithm ◽  
Bathymetric Data ◽  
Outliers Detection ◽  
Spatial Outliers

scholarly journals A comparison of bathymetry mapped with the Simrad ME70 multibeam echosounder operated in bathymetric and fisheries modes

2010 ◽  
Vol 67 (6) ◽  
pp. 1301-1309 ◽  
Author(s):  
George R. Cutter ◽  
Laurent Berger ◽  
David A. Demer
Keyword(s):  
Software Development ◽  
Data Processing ◽  
Bay Of Biscay ◽  
Marine Science ◽  
Dual Use ◽  
Detection Range ◽  
Multibeam Echosounder ◽  
Acoustic Backscattering ◽  
Bathymetric Data ◽  
Phase Data

Abstract Cutter, G. R. Jr, Berger, L., and Demer, D. A. 2010. A comparison of bathymetry mapped with the Simrad ME70 multibeam echosounder operated in bathymetric and fisheries modes. – ICES Journal of Marine Science, 67: 1301–1309. The Simrad ME70 multibeam echosounder was designed for quantitative fisheries research and is currently installed on Ifremer's fishery survey vessel (FSV) “Thalassa” and each of the new, quiet, NOAA FSVs. The ME70 has configurable beams and transmits in the range 70–120 kHz to provide calibrated, acoustic-backscattering data throughout the detection range (fisheries mode, FM). With optional hardware and software, the ME70 can also collect soundings that potentially meet International Hydrographic Organization's S–44 Order 1 standards (bathymetric mode, BM). Furthermore, with custom algorithms and software, bathymetric data can be obtained from the ME70 operating in FM, and volume backscatter can be sampled from the ME70 operating in BM. This flexibility allows data to be concurrently collected on fish and their seabed habitat. A method is described for processing the echo amplitude and phase data from multiple split-beams formed in FM to estimate seabed range, slope, and roughness. The resulting bathymetry is compared with that collected with the ME70 operating in BM in the same area of the Bay of Biscay. A proposal is made for software development to facilitate dual-use data processing.

New Developments in Multibeam Backscatter Data Collection and Processing

2001 ◽  
Vol 35 (4) ◽  
pp. 46-50 ◽  
Author(s):  
Doug Lockhart ◽  
Edward Saade ◽  
Jerry Wilson
Keyword(s):  
Data Collection ◽  
Sidescan Sonar ◽  
New Developments ◽  
Acoustic Data ◽  
Bathymetric Data ◽  
Data Products ◽  
Processing Techniques

Recognition of the superior data and coverage from multibeam echosounders (MBES) has been widespread and is increasing rapidly. In addition to the significant value of ensonification of a swath as compared to a profile of bathymetric data, the acoustic data have been frequently presented as "psuedo-sidescan-sonar". Field programs conducted during 2001 using Reson MBES systems and TritonElics software gave us the opportunity to develop enhanced acoustic imagery by manipulation of the backscatter information within each MBES beam. This work has resulted in improved MBES data products using new acquisition and processing techniques.

scholarly journals DESIGN OF A FREE AND OPEN SOURCE DATA PROCESSING, ARCHIVING, AND DISTRIBUTION SUBSYSTEM FOR THE GROUND RECEIVING STATION OF THE PHILIPPINE SCIENTIFIC EARTH OBSERVATION MICRO-SATELLITE

2016 ◽  
Vol XLI-B7 ◽  
pp. 909-911
Author(s):  
R. K. D. Aranas ◽  
B. J. D. Jiao ◽  
B. J. P. Magallon ◽  
M. K. F. Ramos ◽  
J. A. Amado ◽  
...  
Keyword(s):  
Data Processing ◽  
Open Source ◽  
The Philippines ◽  
Tunable Filter ◽  
Earth Observation ◽  
Wide Field ◽  
Data Archiving ◽  
Data Products ◽  
Control Segment ◽  
Processing Subsystem

The Philippines’s PHL-Microsat program aims to launch its first earth observation satellite, DIWATA, on the first quarter of 2016. DIWATA’s payload consists of a high-precision telescope (HPT), spaceborne multispectral imager (SMI) with liquid crystal tunable filter (LCTF), and a wide field camera (WFC). Once launched, it will provide information about the Philippines, both for disaster and environmental applications. Depending on the need, different remote sensing products will be generated from the microsatellite sensors. This necessitates data processing capability on the ground control segment. Rather than rely on commercial turnkey solutions, the PHL-Microsat team, specifically Project 3:DPAD, opted to design its own ground receiving station data subsystems. This paper describes the design of the data subsystems of the ground receiving station (GRS) for DIWATA. The data subsystems include: data processing subsystem for automatic calibration and georeferencing of raw images as well as the generation of higher level processed data products; data archiving subsystem for storage and backups of both raw and processed data products; and data distribution subsystem for providing a web-based interface and product download facility for the user community. The design covers the conceptual design of the abovementioned subsystems, the free and open source software (FOSS) packages used to implement them, and the challenges encountered in adapting the existing FOSS packages to DIWATA GRS requirements.

scholarly journals Correction to: Kanzelhöhe Observatory: Instruments, Data Processing and Data Products

Solar Physics ◽  
2022 ◽  
Vol 297 (1) ◽  
Author(s):  
Werner Pötzi ◽  
Astrid Veronig ◽  
Robert Jarolim ◽  
Jenny Marcela Rodríguez Gómez ◽  
Tatiana Podladchikova ◽  
...  
Keyword(s):  
Data Processing ◽  
Data Products

scholarly journals From NEON Field Sites to Data Portal: A Community Resource for Surface–Atmosphere Research Comes Online

2019 ◽  
Vol 100 (11) ◽  
pp. 2305-2325 ◽  
Author(s):  
Stefan Metzger ◽  
Edward Ayres ◽  
David Durden ◽  
Christopher Florian ◽  
Robert Lee ◽  
...  
Keyword(s):  
Data Processing ◽  
Atmospheric Chemistry ◽  
Meteorological Data ◽  
The United States ◽  
Observation System ◽  
Ongoing Research ◽  
Continental Scale ◽  
Surface Atmosphere ◽  
Data Products ◽  
Data Portal

AbstractThe National Ecological Observatory Network (NEON) is a multidecadal and continental-scale observatory with sites across the United States. Having entered its operational phase in 2018, NEON data products, software, and services become available to facilitate research on the impacts of climate change, land-use change, and invasive species. An essential component of NEON are its 47 tower sites, where eddy-covariance (EC) sensors are operated to determine the surface–atmosphere exchange of momentum, heat, water, and CO2. EC tower networks such as AmeriFlux, the Integrated Carbon Observation System (ICOS), and NEON are vital for providing the distributed observations to address interactions at the soil–vegetation–atmosphere interface. NEON represents the largest single-provider EC network globally, with standardized observations and data processing explicitly designed for intersite comparability and analysis of feedbacks across multiple spatial and temporal scales. Furthermore, EC is tightly integrated with soil, meteorology, atmospheric chemistry, isotope, phenology, and rich contextual observations such as airborne remote sensing and in situ sampling bouts. Here, we present an overview of NEON’s observational design, field operation, and data processing that yield community resources for the study of surface–atmosphere interactions. Near-real-time data products become available from the NEON Data Portal, and EC and meteorological data are ingested into AmeriFlux and FLUXNET globally harmonized data releases. Open-source software for reproducible, extensible, and portable data analysis includes the eddy4R family of R packages underlying the EC data product generation. These resources strive to integrate with existing infrastructures and networks, to suggest novel systemic solutions, and to synergize ongoing research efforts across science communities.

scholarly journals Experiment to quantify the solar radiative temperature error of radiosondes

2021 ◽  
Author(s):  
Christoph von Rohden ◽  
Michael Sommer ◽  
Tatjana Naebert ◽  
Ruud Dirksen
Keyword(s):  
Solar Radiation ◽  
Data Processing ◽  
Temperature Sensor ◽  
Ambient Pressure ◽  
Longitudinal Axis ◽  
Atmospheric Temperature ◽  
Temperature Error ◽  
Data Products ◽  
Set Up

<p>One of the main goals of the GCOS Reference Upper Air Network (GRUAN) is to perform reference observations of profiles of atmospheric temperature and humidity for the purpose of monitoring climate change. Two essential criteria for establishing a reference observation are measurement-traceability and the availability of measurement uncertainties. Radiosoundings have proven valuable in providing in-situ profiles of temperature, humidity and pressure at unmatched vertical resolution. Data products from commercial radiosondes often rely on black-box or proprietary algorithms, which are not disclosed to the scientific user. Furthermore, long-term time-series from these products are frequently hampered by changes in the hardware and/or the data processing. GRUAN data products (GDPs) comply with the above-mentioned criteria for a reference product. Correction algorithms are open-source and well-documented and the data include vertically resolved best-estimates of the uncertainties.</p><p>This presentation discusses the quantification and the correction for the temperature error due to solar radiation that is applied in the GRUAN data processing for the Vaisala RS41 radiosonde. Heating of the temperature sensor by solar radiation is the dominant source of error for daytime radiosoundings.</p><p>At Lindenberg Observatory a dedicated laboratory set-up was built to quantify the solar temperature error of radiosondes. The setup allows to create conditions that are similar to those encountered during an actual radiosounding, with special emphasis on parameters such as pressure, air flow (ventilation), and illumination conditions. The radiosonde is placed inside a quartz tube that is integrated in a wind tunnel-like construction that can be operated between ambient pressure and 3 hPa. During the measurements the radiosonde is rotated along its longitudinal axis to mimic the spinning during ascent, and the large quartz window makes it possible to illuminate the temperature sensor together with a considerable part of the sensor boom, allowing to assess the contribution of the heat transfer from the sensor boom to the sensor. A parameterization of the heating of the sensor in terms of flux, pressure, ventilation and solar elevation is presented. This parameterization is the basis of the GRUAN correction algorithm, which in addition includes a radiation model and altitude information. In conclusion the GRUAN data product is compared to the manufacturer-processed data.</p>

scholarly journals Long term evolution of a dam reservoir subjected to regular flushing events

2014 ◽  
Vol 39 ◽  
pp. 89-94 ◽  
Author(s):  
L. Guertault ◽  
B. Camenen ◽  
C. Peteuil ◽  
A. Paquier
Keyword(s):  
Data Processing ◽  
Morphological Evolution ◽  
Spatial Dynamics ◽  
Dam Reservoir ◽  
Reservoir Sediment ◽  
Volume Calculation ◽  
Bathymetric Data ◽  
Sediment Volume ◽  
Term Evolution

Abstract. An analysis of the long term morphological evolution of the Génissiat reservoir (France) is provided. First, a methodology for bathymetric data processing and reservoir sediment volume budget calculation is described. An estimation of global uncertainties in volume calculation is proposed. The reservoir bathymetric budget for several dam flushing events and interflush periods is presented, showing the global decrease of deposited sediment volume with time. The spatial dynamics of the reservoir subreaches is highlighted and typical patterns in flush and interflush periods are identified.

Sign in / Sign up

Export Citation Format

Share Document