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

Precipitation Gravimetry01:03

Precipitation Gravimetry

Precipitation gravimetry is based on converting an analyte into a sparingly soluble precipitate, which is separated by filtration and weighed. An ideal precipitate should be pure, insoluble, of known composition, and easily filtered from the reaction mixture.
In determining nickel by gravimetric analysis, a precipitant of ethanolic dimethylglyoxime is added to a hot nickel salt solution. This is quickly followed by the dropwise addition of dilute ammonia solution until precipitation occurs. A...
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...
Flame Photometry: Lab01:16

Flame Photometry: Lab

In a flame photometer, when a solution like potassium chloride is aspirated into the flame, the solvent evaporates, leaving behind dehydrated salt. This salt dissociates into free gaseous atoms in their ground state. Some of these atoms absorb energy from the flame, leading to their excitation. The excited atoms return to the ground state, emitting photons at characteristic wavelengths. Because only electronic transitions are involved, the resulting emission lines are very narrow. The intensity...
Gravimetry: Overview01:05

Gravimetry: Overview

Gravimetric analysis is a quantitative method where the analyte is isolated and weighed directly or after conversion into a substance of known composition. Gravimetric analysis can be classified as precipitation, electrogravimetry, volatilization, and particulate gravimetry, based on the method used to isolate the analyte.
In precipitation gravimetry, the analyte is converted into a precipitate and weighed. For example, the silver content in a sample can be estimated by precipitating and...
Types of Global Positioning System Surveys01:30

Types of Global Positioning System Surveys

GPS surveying methods vary in application, accuracy, and data collection techniques, catering to diverse surveying and mapping needs. Static GPS, kinematic GPS, and real-time kinematic (RTK) surveying are widely used. Each technique offers distinct advantages.Static GPS involves placing one receiver at a known reference point and another at the target point. It collects exact positional data by observing multiple satellite ranges over an extended period, achieving centimeter-level accuracy for...

You might also read

Related Articles

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

Sort by
Same author

School readiness and its determinants among children 4 to 6 years in Zanzibar: a baseline population-based cross-sectional survey.

Frontiers in public health·2026
Same author

C-reactive protein and residual cardiovascular risk in hypertension: a prospective cohort study.

Journal of human hypertension·2026
Same author

Vulnerable Narcissism Modulates Early Neural Processing of Verbal Violence in Women: An ERP Study.

Behavioral sciences (Basel, Switzerland)·2026
Same author

High power and efficiency tandem-pumping of a widely tunable Tm-doped all-fiber MOPA.

Optics express·2026
Same author

Particulate matter and respiratory health in middle-aged and older adults: disentangling size-fractionated and constituent-specific effects under China's clean-air policies.

BMC medicine·2026
Same author

Spatiotemporal Visualization of Nanoscale Rotational Dynamics by Movie-Mode Transmission Electron Microscopy.

ACS nano·2026

Related Experiment Video

Updated: May 29, 2026

Measuring the Structure, Composition, and Change of Underwater Environments with Large-area Imaging
09:19

Measuring the Structure, Composition, and Change of Underwater Environments with Large-area Imaging

Published on: April 18, 2025

CALIPSO lidar ratio retrieval over the ocean.

Damien Josset1, Raymond Rogers, Jacques Pelon

  • 1SSAI, Hampton, VA 23681, USA. damien.b.josset@nasa.gov

Optics Express
|September 22, 2011
PubMed
Summary

This study shows CALIPSO can accurately measure the 532 nm lidar ratio over oceans using CloudSat data. Results show good agreement with airborne High Spectral Resolution Lidar (HSRL), indicating CALIPSO

More Related Videos

Investigating the Relationship between Sea Surface Chlorophyll and Major Features of the South China Sea with Satellite Information
10:28

Investigating the Relationship between Sea Surface Chlorophyll and Major Features of the South China Sea with Satellite Information

Published on: June 13, 2020

Surface Mapping of Earth-like Exoplanets using Single Point Light Curves
06:48

Surface Mapping of Earth-like Exoplanets using Single Point Light Curves

Published on: May 10, 2020

Related Experiment Videos

Last Updated: May 29, 2026

Measuring the Structure, Composition, and Change of Underwater Environments with Large-area Imaging
09:19

Measuring the Structure, Composition, and Change of Underwater Environments with Large-area Imaging

Published on: April 18, 2025

Investigating the Relationship between Sea Surface Chlorophyll and Major Features of the South China Sea with Satellite Information
10:28

Investigating the Relationship between Sea Surface Chlorophyll and Major Features of the South China Sea with Satellite Information

Published on: June 13, 2020

Surface Mapping of Earth-like Exoplanets using Single Point Light Curves
06:48

Surface Mapping of Earth-like Exoplanets using Single Point Light Curves

Published on: May 10, 2020

Area of Science:

  • Atmospheric Science
  • Remote Sensing
  • Lidar Technology

Background:

  • Accurate measurement of aerosol properties is crucial for climate modeling.
  • CALIPSO (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation) provides global aerosol data.
  • Lidar ratio is a key parameter for aerosol characterization.

Purpose of the Study:

  • To demonstrate CALIPSO's capability in retrieving the 532 nm lidar ratio over ocean surfaces.
  • To validate CALIPSO-derived lidar ratios using CloudSat surface scattering constraints.
  • To compare CALIPSO lidar ratio retrievals with NASA's airborne High Spectral Resolution Lidar (HSRL).

Main Methods:

  • Utilizing CloudSat surface scattering cross-section as a constraint for CALIPSO lidar ratio retrieval.
  • Developing and presenting a novel algorithm for CALIPSO data processing.
  • Conducting comparative analysis between CALIPSO and HSRL column lidar ratio data.

Main Results:

  • CALIPSO demonstrated good agreement with HSRL for retrieved 532 nm column lidar ratios.
  • Average CALIPSO lidar ratio bias was 13.7% with a 13.6% relative standard deviation compared to HSRL.
  • Best results (7% bias, 6% std dev) achieved for homogeneous aerosol conditions during nighttime.

Conclusions:

  • CALIPSO, constrained by CloudSat data, is a capable tool for retrieving oceanic lidar ratios.
  • The retrieved lidar ratio serves as a reliable indicator of aerosol types.
  • Accuracy is influenced by aerosol homogeneity, signal-to-noise ratio, and optical depth errors.