Raman lidar in the frame of INTERACT campaign of ACTRIS. 1 and data message No. - Chapter 2, Product Overview, introduces the features, advantages,. This manual consists of the following chapters: Chapter 1, General Information, Chapter 3provides general notes for the manual and the product.
01a Table 1-1 lists the revision history that may apply in comparison to other units. · With over 1,000 installed worldwide, the Vaisala CT25K is a field-proven and popular laser ceilometer for measuring cloud height and vertical visibility. rameters in the CT25K manual (V aisala, 1999) can be used to calculate the optical overlap function of the instrument. Meanwhile, additional CEILs were gradually deployed at all other ARM sites, including the now-decommissioned Tropical Western Pacific sites, between 19.
Ceilometer aerosol profiling vs. ASOS ceilometer algorithm(2, CT25K embedded algorithm and the new Sky Condition algorithm are presented in table 1. CT25K Data Messages Ceilometer CL31 also includes two Ceilometer CT25K data messages. exceed design limits. 5 CT25K Messages MESSAGE 113, CT25K Data Message No.
From the backscatter profiles cloud base heights and signal penetration depths, aerosol layer heights and vertical visibility are determined. View online or download Vaisala CL31 User Manual. bas, respectively. Ceilometer CL31 for Cloud Height Detection Features • Measurement range from 0 to 7.
· In addition to the manual observations, each site (except Cape Grim) features a single vertically pointing Vaisala CT25K ceilometer. 1 This message is intended for cloud height/vertical visibility measurement when no other measurement information is desired. · Ceilometer CT25K CT25K-U059en-2. Vaisala CT25K Pdf User Manuals. It is a compact and lightweight instrument for cloud base height and vertical visibility measurements.
Product Manual 65 MESSAGE 114, CT25K Data Message No. Page 11: Safety Summary. These are data message No. Model CT25K has a maximum vertical range of 25,000.
A ceilometer measures the cloud base height,. V aisala’s CT25k ceilometer was presented by Mark owicz et al. bas, and HygroClip. (Product manuals are available for review online at. station uses a CT25K model ceilometer from the Vaisala.
Each sensor program has been written to be associated with a Basic Sensor block in the graphical setup. It´s backscatter profiling over full range is up to 15 km (49,200 ft). The CL31 is ideal for aviation and. eu or by telephoningUK). Chapter 1 offers an overview and technical specifications of the CT25K Ceilometer. If there are clouds present, compare CT25K height values to qualified observers height approximation.
Backscatter profiling performance and reliability in all weather conditions up to 25,000 feet (7. After 1 minute blower should start, remove paper, after 1 minute blower should stop. About This Manual This manual provides information for installing, operating, and maintaining Vaisala Ceilometer CL31.
The CL31 employs a pulsed diode laser LIDAR (light detection and ranging) technology. CT25K Data Message No. CT25K uses the same sin-. To continue using Vaisala online store, we recommend to use Google Chrome, Firefox or Edge browsers. Connect the maintenance terminal to CT25K to check Status message and Message line ; Place a piece of paper on the window (blower off).
Meanwhile, additional VCEILs. FD12P users manual, the visibility measurement has an uncertainty of about ±4% and the precipitation intensity measurement has an uncertainty of ±30%. A basic program file exists for each of these sensors: CT25k. Contents of This Manual This manual consists of the following chapters: - Chapter 1, General Information, provides general notes for the product. 5 km) thus covering most heights where dense clouds appear. View and Download Campbell Scientific CS135 Lidar Ceilometer instruction manual online. CL31 Ceilometer for Cloud Height Detection The Vaisala Ceilometer CL31 is a compact and lightweight instrument for cloud base height and vertical visibility measurements. 1 VALIDITY OF THIS MANUAL This manual covers ceilometer CT25K in all its configurations as defined by the parts and options listed in section 1.
Any reflected signal back towards the ceilometer will be sensed by the unit’s receiver. 6 Example message. Chapter 2, Product Overview, introduces the features, advantages, and the product nomenclature. Menus, option screens, icons and help texts. This document is divided into 8 chapters. Ceilometer CHM15k. The ceilometer can detect clouds below 12 500 ft (3810 m).
and the new generation CL31. It detects three cloud layers simultaneously. The Vaislala CT25K ceilometer transmits a single vertical or near vertical-pointing laser pulse from the unit’s transmitter. 1 User’s Guide vii INTRODUCTION TO MANUAL The purpose of this User’s Guide is to be a general information source as well as a detailed operational guide for the user of Ceilometer CT25K. Vaisala Ceilometer CL31 measures cloud base height and vertical visibility in all weather - good or bad. sensors: Vaisala CT25K ceilometer, Vaisala FS11 visibility sensor, Vaisala PTB220 barometer, and Rotronic Hygroclip AT/RH.
With over 1,000 installed worldwide, the Vaisala CT25K is a field-proven and popular laser ceilometer for measuring cloud height and vertical visibility. Vaisala CL31 Pdf User Manuals. Be familiar and comply with all instructions provided in product manuals. on the ceilometer window. Vaisala CT25K Ceilometer in. The Vaisala CT25K Laser Ceilometer is a general-purpose cloud height sensor employing LIDAR (Light Detection ct25k ceilometer manual and Ranging) technology for detection of clouds, precipitation and other obstructions to vision. Ceilometer CT25K.
CS135 Ceilometer. 5 CT25K Messages. The Ceilometer model&39;s CT12K and LD40 are also partially supported. Manuals; Brands;. 6 km (from 0 to 25 000 feet) • Modular design for easy installation and maintenance • Second-generation, advanced single-lens optics provides excellent performance also at low altitudes • Fast measurement enables detection of thin cloud layers below a.
December ; DOI: 10. SkyVUETM8M LIDAR Ceilometer 62 6. Vaisala´s CL51, CL31, CT25K and CT75K Laser Ceilometers. User’s Guide CT25K-U059en-2. CT25K Data Messages Ceilometer CL31 ct25k ceilometer manual includes two Ceilometer CT25K data messages. Use the key to open the door of the ceilometer and in this order, turn on the equipment power switch, the window conditioner switch, and the battery switch.
Company, a version between the old generation CT12K. ct25k ceilometer manual 7013C Laser Ceilometer was deployed at the ARM Climate Research Facility Southern Great Plains site in 1994 and was replaced with a Vaisala CT25K Ceilometer in. Figure 1-1 Ceilometer CT25K. By this method, overlap is found to be 45 % at 100 m, 78 %. The CHM 15k ceilometer is a robust, autonomous and low power lidar for measuring vertical profiles of backscatter signal from aerosol particles and hydrometeors. It records the intensity of the return from the atmosphere and can infer the presence of up to three cloud layers. Features/Benefits Produces sky condition information from a single ceilometer New calculation algorithm – good results compared to human observers Optional for the CL31 and CL51 ceilometer&39;s Generally used in automatic. The Vaisala ceilometer (VCEIL) is a self-contained, ground-based, active, remote-sensing device designed to measure cloud-base height at up to three levels and potential backscatter signals by aerosols.
1, running under software revision CT25K- 2. CT25K Data Message No. Vaisala Graphical User Interface for Ceilometers CL-VIEW is an independent data collection, storage and presentation program designed for Vaisala&39;s CL51, CL31, CT25K and CT75K Laser Ceilometers. This station uses a CT25K model ceilometer from the Vaisala Company, a version between the old generation CT12K and the new generation CL31. Manuals are available at www. Connecting and Setting up CT25K: To turn ON: Connect one end of power cable to J2 which is located underneath the device and connect other end to a power outlet. The CL-VIEW program runs on a PC with Microsoft ® Windows 7, ct25k Windows Vista or earlier operating systems, providing all conveniences of a graphical user interface. You are responsible for conformance with governing codes and regulations, including safety regulations, and the integrity and location of structures or land.
Samples are recorded every 30 s and integrated over a 30-min period, with more weighting given to the last 10 min of the sample period to make the sky. This pulse will be reflected or scattered when it encounters cloud. 6 page 8 and section 5. The CT25K provides reliable determination of cloud height up to 25,000 feet (7.
It employs pulsed diode laser Light Detection and Ranging (LIDAR) technology to detect clouds, precipitation and other obstructions to vision. The Vaisala Ceilometer CL51 is designed to measure high-range cirrus cloud heights ct25k ceilometer manual without surpassing the low and middle layer clouds, or vertical visibility in harsh conditions. 9 The VIASALA CT25K Ceilometer uses a pulsed diode laser at a wavelength of 905 nm and Light Detection and Ranging (LIDAR) principles to determine cloud base height. (), but under operational conditions such a de- tailed consideration of water vapor absorption is not possi-. See manual section 1. View online or download Vaisala CT25K User Manual. The Vaisala CT25K ceilometer is a vertically pointing laser device operating at 905 nm.
The ceilometer does not specifically measure cloud base but instead receives a strong return when any part of a cloud is directly above it. CT25K uses the same single lens technology as CL31 and comparison between CT25K and CL31 shows that these instruments capture a similar pattern of cloud features, while CL31 has a better vertical.
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