Download Data Processing in Precise Time and Frequency Applications by M. Desaintfuscien PDF

By M. Desaintfuscien

Actual approaches, concerning atomic phenomena, permit an increasing number of distinct time and frequency measurements. This growth isn't attainable with out handy processing of the respective uncooked facts. The ebook describes the information processing at numerous degrees: layout of the time and frequency references, characterization of the time and frequency references, purposes concerning exact time and/or frequency references.The metrological houses balance, accuracy and reproducibility are outlined and the approaches resulting in their characterization are proven. some of the features of the variance of the frequency fluctuations are mentioned and in comparison and their importance is given.Some significant purposes of the simplest frequency and time criteria are ultimately mentioned. the way in which the extraordinary precision of those resources is used to acquire special time and place details is proven: Time scales, used to explain each human and physical games, similar to astronomy, actual legislation, etc.; Positioning platforms, similar to GPS; Very lengthy base interferometry (VLBI).

Show description

Read or Download Data Processing in Precise Time and Frequency Applications PDF

Similar organization and data processing books

Statistical Treatment of Analytical Data

SynopsisIf for no different cause, the yank ISO 25 and eu EN45001 criteria have elevated analytic laboratories' know-how of the statistic remedy of analytic information and its have to be either actual and designated at the same time. right here the authors support practitioners via interpreting statistical measures of experimental information, distribution features, self assurance limits of the capability, value assessments, and outliers.

The CB EPROM Data Book

My curiosity in CB conversions begun a few years after Lou Franklin first released his"Screwdriver Expert's advisor" and "The CB PLL facts Book". for this reason i used to be capable toread those and stepped forward fast from having a passing curiosity in CB to really runninga fix enterprise and publishing a quarterly e-newsletter for like-minded members.

Large-Scale Parallel Data Mining

With the unparalleled growth-rate at which information is being gathered and saved electronically this day in just about all fields of human activity, the effective extraction of worthwhile details from the information on hand is turning into an expanding clinical problem and an incredible monetary desire. This ebook provides completely reviewed and revised complete models of papers offered at a workshop at the subject held in the course of KDD'99 in San Diego, California, united states in August 1999 complemented via a number of invited chapters and a close introductory survey which will supply whole insurance of the appropriate matters.

Extra info for Data Processing in Precise Time and Frequency Applications

Sample text

39) In conclusion, for very low values of the Fourier frequency ν (such that 1)), the direct contribution of the local oscillator frequency noise |GOL (ν)| vanishes, but the effect of frequency aliasing due to the sampling brings the contribution fout (ν) ≈ δfLO (ν + k/Tl ) . 40) k=0 Special care must be taken to reduce this contribution by choosing the local oscillator. This local oscillator is often a hydrogen maser (see [57] for an example). 37) shows that the frequency noise of the local oscillator is totally transmitted on the output of the device.

Measure the residual population unbalance after the interrogation, which indicates how far f1 is from fCs . This is the response of the beam. 6. The response of the beam is then used to correct the frequency fo , so that it is as close as possible to its nominal value according to the definition of the SI second. This is the servo control of the output frequency. These steps can be found in every passive atomic frequency standard. They are summarized in Fig. 6 and details are given below. The atomic beam is in a vacuum chamber as good as possible, and the region where the atoms are excited by the microwave radiation is protected from spurious magnetic field by magnetic shields.

The difference between the output frequency (neglecting the effect of the various noise sources) and the atomic transition frequency. This is done by calculating the frequency response of the loop at the null Fourier frequency for the nominal frequency of the local oscillator and that of the atomic signal. This loop is shown in Fig. 5. The blocks with a transfer function ν and 1/ν correspond to the conversions phase → frequency and frequency → phase. The following frequency responses are deduced from this loop: fout kpc KH(ν) = f0 ν + nkpc KH(ν) 1 = , n fout ν = fLO ν + nkpc KH(ν) =0.

Download PDF sample

Rated 4.36 of 5 – based on 46 votes