883 research outputs found
MIVIS image geocoding experience on merging position attitude system data and public domain GPS stream (ASI-GeoDAF)
The use of airborne scanners involves geo-referencing problems, which are difficult because of the need to know
the exact platform position and attitude for each scan line. The errors of the onboard navigation system are normally
corrected using ground control point on the image. This post-processing correction procedure is too long
in case of multiple flight campaigns, and besides it implies the need to have available 1:10000 orthophotoimages
or maps in digital format. To optimize the above procedure a new method to correct MIVIS navigational
data in the post-processing phase has been implemented. The procedure takes into consideration the GPS stream
in Rinex format of common knowledge and findable on the web, acquired at the ground stations of the Geodetic
Data Archiving Facilities provided by ASI. The application of this correction entails the assumption that the
environmental variables affecting both onboard and geodetic GPS equally affect the position measurements. The
airborne data correction was carried out merging the two data sets (onboard and ground station GPS) to achieve
a more precise aircraft trajectory. The present study compares the geo-coded images obtained by means of the
two post-processing methods
Il servizio WCTS del Geoportale Nazionale
The 2007/2/CE INSPIRE directive requires every Member State to implement a set of services to
facilitate the interchange of spatial data; the Coordinate Transformation Service (CTS) is one of
the geometric transformation services required by the directive. The Italian National Geoportal
(GN) has recently published a new set of public access services that enable the users to transform
and convert the coordinate reference system of geographic data within the Italian territory using
the high-accuracy correction data provided by the Istituto Geografico Militare Italiano (IGM).
This article will illustrate these newly published services: a browser-based web application to
transform raster and vector files or sets of coordinates and an OGC-compliant Web Coordinate
Transformation Service (WCTS) that performs on the fly transformation of GML (Geography
Markup Language) data
Qualidade do solo em áreas de plantio convencional sob latossolos do cerrado.
O cultivo convencional envolve o revolvimento e pulverização do solo, aplicação de corretivos e fertilizantes e exposição das partículas de solo. Este cultivo pode alterar a estrutura do solo, o que reflete no índice de qualidade do solo. Assim, o objetivo do presente estudo foi estabelecer índices que expressam a qualidade do solo em áreas de manejo com cultivo convencional em Latossolos sob Cerrado, através da avaliação de atributos físicos e químicos dos solos
Gamma-hydroxybutyrate (GHB) for prevention and treatment of alcohol withdrawal
This is the protocol for a review and there is no abstract. The objectives are as follows: To evaluate the efficacy and safety of GHB in prevention and treatment of the AWS, more specifically • to compare the efficacy of GHB with placebo or other drugs; • to identify the most effective GHB dosage and schedules; • to estimate the incidence of side effects; • to carry out a risk-benefit analysis
Avaliação do padrão tecnológico e tendências da agricultura de precisão no Estado do Tocantins.
Mycobacterium leprae in Armadillo Tissues from Museum Collections, United States
We examined armadillos from museum collections in the United States using molecular assays to detect leprosy-causing bacilli. We found Mycobacterium leprae bacilli in samples from the United States, Bolivia, and Paraguay; prevalence was 14.8% in nine-banded armadillos. US isolates belonged to subtype 3I-2, suggesting long-term circulation of this genotype
Being a Gambler during the COVID-19 Pandemic: A Study with Italian Patients and the Effects of Reduced Exposition
MIVIS image geocoding experience on merging position attitude system data and public domain GPS stream (ASI-GeoDAF)
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Pushing Time-Domain Diffuse Optics to Its Ultimate Limits: New Large-Area Detector and Operation Modality
Large area single-photon detectors enhance light harvesting capability beyond state-ofthe-art provided that pile-up distortion is corrected. We test a 10 × 10 mm2 SiPM-based detector and study the possibility to work beyond singe-photon statistics
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