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Clutter present in radar return signals as used for wind profiling is substantially removed by carrying out a Daubechies wavelet transformation on a time series of radar return signals. The smoothly varying nature of the return from clutter provides a relatively small number of high amplitude components in the wavelet transformation, which are truncated to remove the clutter. Inverse transformation yields a time series having had a significant amount of clutter removed, without distortion of the radar return from turbulence, which can then be processed to provide useful wind profile data.
Tags radar signal wavelet
Updated
March 25 2015
Views
99


Data Provided by census.data.commerce.gov
External Link
The North American Industry Classification System (NAICS) is the standard used by Federal statistical agencies in classifying business establishments for the purpose of collecting, analyzing, and publishing statistical data related to the U.S. business economy.
Tags accommodation administration administrative agriculture and 50 more
Updated
March 25 2015
Views
367

External Link
A system for wind profiling comprises sondes for being borne through the atmosphere by balloons and transmitting signals enabling identifying the sondes, and received by receivers capable of determining the angle of arrival (AOA) of the signals from the sondes, so that they can be tracked. In the preferred embodiment, the signal transmitted by each sonde is a phase-shift-keyed (PSK) signal. The carrier phase difference as measured at two spaced antennas is measured to provide an accurate but ambiguous measure of the difference in distance of the path length between the sonde and receivers, and the symbol phase difference is employed to remove the ambiguity. The difference in path length is then used to determine AOA. Atmospheric data and the sonde identification are encoded using a psuedo-random sequence (PRS) of the PSK symbols.
Tags prs psk receiver signals and 1 more
Updated
March 25 2015
Views
97


Data Provided by ita.data.commerce.gov
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This tariff search tool allows users to find tariff information on specific industrial goods covered under the U.S. FTAs. The tool shows the tariff applied on the date the FTA enters into force and the rates each subsequent year as the tariffs are eliminated under the agreement.
Tags agreement free trade fta goods
Updated
March 25 2015
Views
364


Data Provided by uspto.data.commerce.gov
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Contains four research datasets containing time series and micro-level data by National Bureau of Economic Research (NBER) technology sub-category on applications, grants, and in-force patents spanning two centuries of innovation.
Tags csv dta micro-level nber and 5 more
Updated
June 25 2020
Views
363


Data Provided by census.data.commerce.gov
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National survey that collects data from a sample of the resident population in the United States. Housing units in every county in the United States and municipio in Puerto Rico, including institutional and non-institutional group quarters, are included in the sample.
Tags
Updated
March 25 2015
Views
362

External Link
Frequently asked questions (FAQs) with answers of what to expect from Audits, Evaluations and Inspections. This page provides the public the reasoning behind why we conduct audits. Also includes FAQs on audits with standards and a general description of the audit process from start to finish with links to Quality Standards for Inspection and Evalutions (January 2012). There is a link to the Departmental Administrative Order 213-5 for the Audit Action Plan and the phone number of the Director of Audit and Evaluaiton as well.
Tags oig audits questions oig commerce
Updated
March 25 2015
Views
95


Data Provided by noaa.data.commerce.gov
External Link
This study was based on the sediment quality triad (SQT) approach. The purpose was to define the extent and magnitude of contamination and biological effects associated with contaminants in the Massachusetts/Cape Cod Bays, Stellwagen Bank, and Boston Harbor. A stratified probabilistic sampling design was utilized to characterize the systems in terms of chemical contamination and benthic infaunal community structure. In addition, samples were taken in the vicinity of the new Boston sewage outfall in Massachusetts Bay and in Boston Harbor where the sewage outfall used to discharge. Toxicity bioassays were not done. A secondary objective was to coordinate with the NOAA NMFS to collect sediment and fish tissue samples at previously sampled Benthic Surveillance Program sites. This file contains sediment and water data measured in all areas sampled in 2004.
Tags analytes benthic butyltins chemical and 25 more
Updated
March 25 2015
Views
352

External Link
The Correspondence category currently includes OIG responses to Congressional requests for information, OIG memoranda to Commerce and bureau leadership regarding OIG review of programs and policies as well as semiannual nonfederal audit results; and occasional miscellaneous postings (e.g., the results of OIG peer reviews by outside organizations). Sometimes, OIG responses to Congressional requests are issued as audit/inspection reports under “Audits/Evaluations.”
Tags noaa inspection oig audit oig inspection
Updated
March 25 2015
Views
94

External Link
Signal processing is used to detect transient signals in the presence of noise. Two embodiments are disclosed. In both embodiments, the time series from a remote sensor is broken into a number of short time series. The power spectrum of each short time series are then calculated along with the mean noise level. The moments of each peak in every power spectrum are calculated and the peak with the largest power selected from each power spectrum. A histogram of the moments from these selected peaks is generated and normalized to become a measured PDF. In addition, a pre-determined PDF is derived, in the same method as above, from theoretically calculated noise, numerically simulated noise, or measured noise. Comparison between the measured and pre-determined PDF's establish the detection of a transient signal. The first embodiment compares the area between the measured and pre-determined PDF's against a threshold to determine detection. In a second embodiment, the differences between the measured and pre-determined PDF's are weighted and summed to form a score. This score is compared to a threshold to determine detection.
Tags histogram noise power sensor and 2 more
Updated
March 25 2015
Views
94

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