Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Instrument Calibration01:12

Instrument Calibration

Instrument calibration is essential for ensuring that instruments produce accurate and consistent results. It is vital in manufacturing, healthcare, testing laboratories, and scientific research. Calibration processes are specific to each instrument and help enhance data accuracy. Each instrument has a unique calibration process tailored to its design and function to improve data accuracy.
Analytical Balance Calibration
An analytical balance measures mass and requires regular calibration to...
Calibration Curves: Linear Least Squares01:20

Calibration Curves: Linear Least Squares

A calibration curve is a plot of the instrument's response against a series of known concentrations of a substance. This curve is used to set the instrument response levels, using the substance and its concentrations as standards. Alternatively, or additionally, an equation is fitted to the calibration curve plot and subsequently used to calculate the unknown concentrations of other samples reliably.
For data that follow a straight line, the standard method for fitting is the linear...
Calibration Curves: Correlation Coefficient01:10

Calibration Curves: Correlation Coefficient

In a linear calibration curve, there is a value called the calibration coefficient, denoted by 'r,' which measures the strength and the direction of association between two variables. The correlation coefficient value ranges from −1 to +1. A value of +1 indicates a perfect positive linear correlation, −1 denotes a perfect negative correlation, and 0 implies no correlation between the two variables. A positive correlation value establishes that as one variable increases, the other increases, and...
Distance Measurements by Taping01:18

Distance Measurements by Taping

Tapes are essential in surveying for accurate, durable, and short-distance measurements. Made from lightweight, nylon-coated steel, they offer flexibility and strength for rugged outdoor use. The nylon coating protects against rust and wear, extending the tape's life. Standard lengths, around 30 meters, are marked in meters and millimeters for precision.Surveyors select tapes based on site conditions and accuracy needs. Lightweight, nylon-coated tapes are commonly used for ease of handling and...
Common Leveling Mistakes and Errors01:17

Common Leveling Mistakes and Errors

A survey team is tasked with determining the elevation difference between points Point A and Point B, separated by uneven terrain. They use a leveling instrument and a leveling rod.Common MistakesMisreading the Rod: During a backsight reading at Point A, the instrumentman observes the rod partially obscured by tall grass. Instead of reading 1.135 m, they mistakenly record 1.735 m due to the misalignment of the crosshair with the wrong graduation. This error adds 0.600 m to all subsequent...
Electronic Distance Measuring Instruments01:30

Electronic Distance Measuring Instruments

Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over short distances...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

"In Situ" Orbital Correlations.

Accounts of chemical research·2026
Same author

Interstitial C/N Doping Stabilizes Pd@Pt Core-Shell Electrocatalysts by Atomic-Scale Interfacial Anchoring and Metal Dissolution Suppression.

Angewandte Chemie (International ed. in English)·2026
Same author

Structural Characterization of Chondroitin Sulfate from Hybrid Sturgeon (<i>Acipenser schrenckii</i> × <i>Huso dauricus</i>) Cartilage and Its Alleviating Effect on Osteoarthritis.

Nutrients·2026
Same author

Dark-EvGS: Event Camera as an Eye for Radiance Field in the Dark.

IEEE transactions on image processing : a publication of the IEEE Signal Processing Society·2026
Same author

Creep Behavior and Its Influencing Factors in High-Entropy Superalloys: A Molecular Dynamics Simulation Study.

Materials (Basel, Switzerland)·2026
Same author

Therapeutic Effect and Underlying Mechanism of Blue Mussel (<i>Mytilus galloprovincialis</i>) Oil on Adjuvant-Induced Rheumatoid Arthritis in Rats.

Nutrients·2026
Same journal

Long-term stabilization of intensity-difference squeezing from four-wave mixing in rubidium vapor.

Optics express·2026
Same journal

Robust 3D topography measurement of large-range high-aspect-ratio structures based on dual-domain statistical filtering in SD-OCT.

Optics express·2026
Same journal

Broadband transmissive terahertz metasurface for simultaneous quad-mode OAM multiplexing.

Optics express·2026
Same journal

Leveraging two-dimensional materials for high-sensitivity optical sensors: quasi-bound states in the continuum within hybrid metasurfaces.

Optics express·2026
Same journal

Resolution investigation for dual-spherical-wave optical scanning holographic microscopy: methods and performance.

Optics express·2026
Same journal

Robustness of parallel subnetwork-filtered diffractive deep neural networks.

Optics express·2026
See all related articles

Related Experiment Video

Updated: Jun 17, 2026

Three-dimensional Super Resolution Microscopy of F-actin Filaments by Interferometric PhotoActivated Localization Microscopy (iPALM)
11:57

Three-dimensional Super Resolution Microscopy of F-actin Filaments by Interferometric PhotoActivated Localization Microscopy (iPALM)

Published on: December 1, 2016

Passive interferometric array optimization based on redundant spacing calibration.

Yuntao He1, Yuesong Jiang, Li Liu

  • 1School of Electronic and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing, China. taoyunhe@ee.buaa.edu.cn

Optics Express
|December 10, 2009
PubMed
Summary
This summary is machine-generated.

This study optimizes passive interferometric circular arrays using redundant spacing calibration (RSC) to remove phase errors. The simulated annealing algorithm (SAA) is employed for array design, enhancing data quality in radio astronomy.

More Related Videos

Active Probe Atomic Force Microscopy with Quattro-Parallel Cantilever Arrays for High-Throughput Large-Scale Sample Inspection
05:04

Active Probe Atomic Force Microscopy with Quattro-Parallel Cantilever Arrays for High-Throughput Large-Scale Sample Inspection

Published on: June 13, 2023

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station
05:57

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station

Published on: April 1, 2020

Related Experiment Videos

Last Updated: Jun 17, 2026

Three-dimensional Super Resolution Microscopy of F-actin Filaments by Interferometric PhotoActivated Localization Microscopy (iPALM)
11:57

Three-dimensional Super Resolution Microscopy of F-actin Filaments by Interferometric PhotoActivated Localization Microscopy (iPALM)

Published on: December 1, 2016

Active Probe Atomic Force Microscopy with Quattro-Parallel Cantilever Arrays for High-Throughput Large-Scale Sample Inspection
05:04

Active Probe Atomic Force Microscopy with Quattro-Parallel Cantilever Arrays for High-Throughput Large-Scale Sample Inspection

Published on: June 13, 2023

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station
05:57

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station

Published on: April 1, 2020

Area of Science:

  • Radio astronomy
  • Array signal processing

Background:

  • Passive interferometric arrays are crucial for radio astronomy.
  • Phase errors limit the performance of array systems.
  • Existing calibration methods may not fully address array constraints.

Purpose of the Study:

  • To optimize passive interferometric circular arrays for improved performance.
  • To eliminate phase errors in array systems through advanced calibration.
  • To develop a robust method for array configuration and calibration.

Main Methods:

  • Optimization of passive interferometric circular arrays.
  • Application of redundant spacing calibration (RSC) principles.
  • Utilizing the simulated annealing algorithm (SAA) for array design.
  • Maximizing the distance between u-v points as an optimization criterion.

Main Results:

  • An optimized design for passive interferometric circular arrays is presented.
  • The simulated annealing algorithm effectively optimizes array configurations.
  • Redundant spacing calibration successfully addresses phase errors.
  • Demonstration with an optimized ten-element passive interferometric circular array.

Conclusions:

  • The proposed optimization technique effectively reduces phase errors in passive interferometric circular arrays.
  • SAA is a suitable algorithm for optimizing array element placement.
  • RSC provides a viable solution for calibrating these optimized arrays.
  • The method enhances the potential for high-resolution radio imaging.