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Update Artykuł “testowy-artykuł-tytuł” +2

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@@ -4,13 +4,13 @@ description: Testowy artykuł - opis
date: 2026-07-24
category: news
author: CTAO
cover: /uploads/Zrzut ekranu 2026-07-24 o 20.28.05.jpg
cover: /uploads/UAE_Event.jpg
draft: false
---
*Artykuł testowy — treść skopiowana z newsa CTAO: [Preparing the Montpellier Raman LIDAR Calibration System for CTAO-South](https://www.ctao.org/news/preparing-the-montpellier-raman-lidar-calibration-system-for-ctao-south/).*
_Artykuł testowy — treść skopiowana z newsa CTAO:_ [_Preparing the Montpellier Raman LIDAR Calibration System for CTAO-South_](https://www.ctao.org/news/preparing-the-montpellier-raman-lidar-calibration-system-for-ctao-south/)_._
---
***
**An essential part of the CTAO telescopes' detectors is situated well above their actual mechanical structure: the Earth's atmosphere.** It is there that high-energy gamma rays interact with atmospheric molecules, giving rise to a [cascade of particles that produce faint flashes of Cherenkov light](https://www.ctao.org/emission-to-discovery/science/how-ctao-works/). Because atmospheric conditions dictate how this light reaches the ground, it is fundamental to characterise our skies continuously — a task performed by devices known as **Raman LIDARs**.
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1. The instrument fires powerful laser pulses into the atmosphere — two beams of different wavelengths at once, covering the spectrum of Cherenkov light seen by the telescopes.
2. A telescope collects the light that bounces back.
3. By measuring the exact time it takes for this light to return, it calculates the amount of aerosols present at different altitudes.
4. The backscattered signal is separated into four channels — one dedicated to *Raman-scattered* light, produced when photons interact with atmospheric nitrogen and shift slightly in wavelength.
4. The backscattered signal is separated into four channels — one dedicated to _Raman-scattered_ light, produced when photons interact with atmospheric nitrogen and shift slightly in wavelength.
This configuration provides scientists with highly detailed atmospheric profiles, allowing them to pinpoint various aerosols.
[![Widok placu budowy CTAO-South na pustyni Atakama](/uploads/Zrzut%20ekranu%202026-07-24%20o%2020.29.07.jpg "Tytuł zdjęcia")](https://www.ctao.org/news/italian-minister-of-university-and-research-visits-the-ctao-south-site-in-chile/)
*Zdjęcie testowe — kliknięcie prowadzi do powiązanego newsa CTAO.*
[![Widok placu budowy CTAO-South na pustyni Atakama](/uploads/MontpellierRamanLidar-1600x1069.jpg "Tytuł zdjęcia")](https://www.ctao.org/news/italian-minister-of-university-and-research-visits-the-ctao-south-site-in-chile/)
_Zdjęcie testowe — kliknięcie prowadzi do powiązanego newsa CTAO._
## Two instruments, two sites