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

Design Example: Measuring Distance Between Two Points with Obstructions01:10

Design Example: Measuring Distance Between Two Points with Obstructions

When measuring distances in areas with physical obstructions, such as a lake in a field, surveyors must employ techniques to calculate accurate lengths without direct line measurements. One effective method is the offset technique, which allows for precise distance estimation over inaccessible stretches.In this scenario, a surveyor must measure a side of an area that crosses a lake. Since the measuring tape cannot span the lake, the surveyor begins by establishing a baseline that aligns with...
Difference from Background: Limit of Detection01:05

Difference from Background: Limit of Detection

The limit of detection (LOD) is the smallest amount of analyte that can be distinguished from the background noise. The LOD value corresponds to the concentration at which the analyte signal is three times larger than the standard deviation of the blank signal. Below this value, the analyte signal cannot be differentiated from the background noise. It is calculated by dividing the calibration slope by 3 times the standard deviation of the blank signals.
The LOD indicates the presence or absence...
Application of Linearization and Approximation01:29

Application of Linearization and Approximation

A drone flying through complex terrain often relies on more than one sensing method to estimate small changes in altitude. Along with direct measurements, air pressure provides a useful indirect indicator of vertical movement. Atmospheric pressure decreases as altitude increases, and this relationship is commonly described using an exponential model. Although accurate, converting pressure measurements into altitude values requires calculations that are too complex to perform repeatedly during...
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...
Differential Leveling01:12

Differential Leveling

Differential leveling is a precise method in surveying used to determine the elevation difference between two points. Its primary goal is to establish accurate vertical measurements to create level surfaces or grade lines critical for designing and constructing infrastructures such as roads, bridges, and buildings.The procedure for differential leveling begins with setting up and leveling the instrument at a point where the benchmark can be seen. The level rod is held on the benchmark (BM), and...
Influence of Earth's Curvature and Atmospheric Refraction on Leveling01:26

Influence of Earth's Curvature and Atmospheric Refraction on Leveling

During leveling, the Earth's curvature and atmospheric refraction introduce deviations in the line of sight from a true horizontal reference. When the line of sight is leveled, it remains perpendicular to the plumb line only at a single point. Beyond this, it deviates due to the Earth’s curvature, represented by the correction C. For a sight distance D, the deviation can be derived using the relationship:This relationship shows that the deviation increases quadratically with distance. Over a...

You might also read

Related Articles

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

Sort by
Same author

Chromobox 2 Inhibition: A Novel Activity of Alisertib, an Aurora A Kinase Inhibitor.

Molecular cancer therapeutics·2026
Same author

Author Correction: Electrical and thermal characterisation of liquid metal thin-film Ga<sub>2</sub>O<sub>3</sub>-SiO<sub>2</sub> heterostructures.

Scientific reports·2024
Same author

Thermal Behavior Changes of As-Received and Retrieved Bio-Active<sup>®</sup> (BA) and TriTanium<sup>®</sup> (TR) Multiforce Nickel-Titanium Orthodontic Archwires.

Materials (Basel, Switzerland)·2023
Same author

Electrical and thermal characterisation of liquid metal thin-film Ga[Formula: see text]O[Formula: see text]-SiO[Formula: see text] heterostructures.

Scientific reports·2023
Same author

Effects of Clinical Use on the Mechanical Properties of Bio-Active<sup>®</sup> (BA) and TriTanium<sup>®</sup> (TR) Multiforce Nickel-Titanium Orthodontic Archwires.

Materials (Basel, Switzerland)·2023
Same author

Predicting wildfire particulate matter and hypothetical re-emission of radiological Cs-137 contamination incidents.

The Science of the total environment·2021

Related Experiment Video

Updated: Jun 23, 2026

Tracking Infiltration Front Depth Using Time-lapse Multi-offset Gathers Collected with Array Antenna Ground Penetrating Radar
07:14

Tracking Infiltration Front Depth Using Time-lapse Multi-offset Gathers Collected with Array Antenna Ground Penetrating Radar

Published on: May 1, 2018

Alternative method for determining the constant offset in lidar signal.

Vladimir A Kovalev1, Cyle Wold, Alexander Petkov

  • 1United States Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory, 5775 Highway 10 West, Missoula, Montana 59808, USA. vkovalev@fs.fed.us

Applied Optics
|May 5, 2009
PubMed
Summary

This study introduces a novel lidar signal offset determination method, improving accuracy by correcting atmospheric and electronic offsets simultaneously. The technique enhances lidar data inversion results by providing a more precise signal constant offset estimation.

More Related Videos

Field Measurement of Effective Leaf Area Index using Optical Device in Vegetation Canopy
06:28

Field Measurement of Effective Leaf Area Index using Optical Device in Vegetation Canopy

Published on: July 29, 2021

Continuous-Wave Propagation Channel-Sounding Measurement System - Testing, Verification, and Measurements
09:36

Continuous-Wave Propagation Channel-Sounding Measurement System - Testing, Verification, and Measurements

Published on: June 25, 2021

Related Experiment Videos

Last Updated: Jun 23, 2026

Tracking Infiltration Front Depth Using Time-lapse Multi-offset Gathers Collected with Array Antenna Ground Penetrating Radar
07:14

Tracking Infiltration Front Depth Using Time-lapse Multi-offset Gathers Collected with Array Antenna Ground Penetrating Radar

Published on: May 1, 2018

Field Measurement of Effective Leaf Area Index using Optical Device in Vegetation Canopy
06:28

Field Measurement of Effective Leaf Area Index using Optical Device in Vegetation Canopy

Published on: July 29, 2021

Continuous-Wave Propagation Channel-Sounding Measurement System - Testing, Verification, and Measurements
09:36

Continuous-Wave Propagation Channel-Sounding Measurement System - Testing, Verification, and Measurements

Published on: June 25, 2021

Area of Science:

  • Atmospheric Science
  • Optical Remote Sensing

Background:

  • Lidar systems require accurate offset determination for reliable atmospheric measurements.
  • Existing methods for offset correction can be complex and sensitive to atmospheric conditions.

Purpose of the Study:

  • To develop an alternative, more accurate method for determining total offset in lidar signals.
  • To improve the precision of lidar signal inversion by refining offset estimation.

Main Methods:

  • A new signal square-range correction procedure is applied to the total lidar signal before offset subtraction.
  • Simultaneous compensation for atmospheric molecular scattering is performed during square-range correction.
  • Offset is determined by calculating the slope of the transformed signal against a specific function involving range and molecular scattering components.

Main Results:

  • The new method accurately estimates lidar signal offset even with moderate aerosol loading.
  • Comparison with conventional techniques using simulated and experimental data shows improved accuracy.
  • Analysis of one-directional and multiangle measurements confirms the method's robustness.

Conclusions:

  • The proposed technique offers a more accurate estimation of the constant offset in lidar signals.
  • This enhanced offset estimation leads to more precise lidar signal inversion results.
  • The method is less sensitive to variations in aerosol loading at the far end of the measurement range.