Ceilometer Units This page has for goal to normalize the units used in Ceilometer. Status: this page was approved in the Feb 7th 2013 irc meeting. Whenever a volume is to be measured, SI approved units and their approved symbols should be used The instrument used to measure cloud cover is a laser beam ceilometer. Back in the 60's and 70's, meteorologists used a rotating beam ceilometer Each meter has its own unit, which you can retrieve with the ceilometer meter-list command. See also the user guide. cpu_util is the instance's CPU utilization measured in percent. The possible maximum value of this meter is 100 Ceilometer The CS135 LIDAR Ceilometer measures cloud height and vertical visibility for meteorological and aviation applications Measurement unit 620 × 235 × 200 mm (24.41 × 9.25 × 7.87 in) Height with shield 1190 mm (47 in) Total 1190 × 335 × 324 mm (46.85 × 13.19 × 12.76 in
powered unit. High voltage is present in AC Power Unit CLP311, Internal Heater CLH311, Ceilometer Engine Board CLE311, and the Window Blower CLB311 at the top of the Shield. Laser Transmitter CLT311, Receiver CLR311, and AC Power Unit CLP311 are equipped with the following warning label: WARNING! HIGH VOLTAGE INSIDE THIS ENCLOSUR A unit of measurement; A type, which indicates whether values increase monotonically (cumulative), are interpreted as a change from the previous value (delta), or are stand-alone and relate only to the current duration (gauge) Sample An individual data point that is associated with a specific meter Ceilometer GPL3+ Clouds meter <> establish the height of clouds through an IR measurement temperature of saturation
Ceilometer is a component of the Telemetry project. Its data can be used to provide customer billing, resource tracking, and alarming capabilities across all OpenStack core components Ceilometer, device for measuring the height of cloud bases and overall cloud thickness. One important use of the ceilometer is to determine cloud ceilings at airports SkyVUE™8 8km Ceiling LIDAR Ceilometer Cloud measurement with state-of-the-art signal processing Overview The SkyVUE™8 LIDAR Ceilometer is ideal for measuring cloud base heights and vertical visibility. Settings for Normal Operation..39 Factory Settings of User Programmable Parameters..40 CHAPTER
The Model 8339 Laser Ceilometer measures cloud height and thickness, in addition to vertical visibility. Unlike other ceilometers, the Model 8339 detects up to four cloud layers simultaneously to a distance of 25,000 vertical feet Ceilometer CT25K consists of three main parts (Figure 1-1): 1 Chapter 3 _____ Installation Mounting of Ceilometer CL31 Ceilometer CL31 is delivered with the measurement unit attached to the shield. The shield can be mounted with the measurement unit attached, but it is recommended that you first remove the measurement unit, mount the shield onto the foundation, and then install the measurement unit into. The Vaisala Ceilometer CL31 is a compact and lightweight instrument for cloud base height and vertical visibility measurements. It detects three cloud layers simultaneously. The CL31 employs a pulsed diode laser LIDAR (light detection and ranging) technology. The CL31 is ideal for aviation and meteorological applications. Measurement starts fro
. Within its measuring range of up to 15 km, it reliably detects several cloud layers, cirrus clouds and aerosol layers. The ceilometer is therefore often used for the following applications and events: Observation of up to 15,000 m high cirrus cloud ceilometer. To get help on a specific command: ceilometer help COMMAND. For example: ceilometer help meter-list. Meters. A meter measures an aspect of resource usage. A meter has a name, a type and a unit of measurement associated with i Vaisala Ceilometer CL31 measures cloud base height and vertical visibility in all weather - good or bad. Backscatter profiling performance and reliability in all weather conditions up to 25,000 feet (7.6 km). It is a compact and lightweight instrument for cloud base height and vertical visibility measurements
Glossary of lidar and ceilometer variables compiled by: I. Mattis and F. Wagner March 14th, 2014. Contents 1 Introduction 4 is to operationally provide vertical pro les of wind measurements and of the aerosol distribu- including formulas and units. Chapter 3 is a collection of de nitions used in the raw data of widely used ceilometers. 4 A unit of measurement is a defined magnitude of a quantity that it used as a standard for measurement for the same kind of quantity, such as measurements of length, weight, and volume. In the past, many systems of measurement were defined on a local level, and could be based on factors as arbitrary as the length of a king's thumb A ceilometer is a device that uses a laser or other light source to determine the height of a cloud ceiling or cloud base. Ceilometers can also be used to measure the aerosol concentration within the atmosphere Remove the transmitter from the unit. Refer to numbers 5 and 6 in Figure 18 on page 98. Place the new transmitter to its place and tighten the transmitter ring in such a way that the labels of the transmitter face the measurement unit door. Page 95 Figure 19 on page 99. The ceilometer unit should now return to normal operation A ceilometer is a tool used to determine the height of the base of a cloud (the lowest visible part of a cloud) or to measure the amount of aerosol in the atmosphere. A ceilometer uses a light source or a laser to measure the cloud base's height. To gather the information used to measure the cloud base height the ceilometer reflects a light beam or laser off the cloud base from the ground and.
Vaisala CT25K Laser Ceilometer With over 1,000 installed worldwide, the Vaisala CT25K is a field-proven and popular laser ceilometer for measuring cloud height and vertical visibility. It employs pulsed diode laser Light Detection and Ranging (LIDAR) technology to Measurement unit 16 k . The unit is not correctly installed or the tilt angle is er than 45'. Instructions Replace CLM311. Replace cLE321 _ Replace cLR321_ Check the installation. The height measurement accuracy is Bost with tilt an r than 45' Glossary of lidar and ceilometer variables compiled by: I. Mattis and F. Wagner March 14th, 2014. Contents 1 Introduction 4 is to operationally provide vertical pro les of wind measurements and of the aerosol distribu- including formulas and units. Chapter 3 is a collection of de nitions used in the raw data of widely used ceilometers. 4 juju add-relation ceilometer:amqp rabbitmq-central juju add-relation ceilometer:amqp-listener rabbitmq-neutron juju add-relation ceilometer:amqp-listener rabbitmq-nova-cell2 High availability When more than one unit is deployed with the hacluster application the charm will bring up an HA active/active cluster A ceilometer is a device that uses a laser or other light source to determine the height of a cloud ceiling or a cloud base from the ground. Ceilometers can also be used to measure the aerosol concentration within the atmosphere
Overview The SkyVUE™8 LIDAR Ceilometer is ideal for measuring cloud base heights and vertical visibility at airports, helipads (onshore or offshore), and other meteorological applications measurements In lidar research, it is customary to consider the PBL height as the height, below which most of the aerosol is con- The CL31 ceilometer and the Raymetrics lidar were com- fined, even if this layer is not always a well-mixed layer bined and collocated for two days (26-27 November 2008) (e.g. Matthias and B¨osenberg, 2002) 7. More Info about CHM8k Ceilometer Lufft Business Unit Optical Laser Sensors. Contact: Nicolas Jalby (sales) Jessika Schugardt (sales) Holger Wille (product management) Carl-Scheele-Str. 16 Berlin - Adlershof German Atmospheric boundary‐layer characteristics from ceilometer measurements. Part 1: A new method to track mixed layer height and classify clouds. Simone Kotthaus. Corresponding Author. logarithm of cleaned and smoothed attenuated backscatter from Vaisala CL31 in arbitrary units for 26 hr detection period. G. Tsaknakis et al.: Inter-comparison of lidar and ceilometer retrievals 1263 Fig. 1. Attenuated backscatter coefﬁcient (in m −1 sr−1) obtained (a) by the ceilometer and (b) the Raymetrics lidar. (c) The ﬁrst derivative of the logarithm of the range-corrected lidar signal (in arbitrary units: A.U.) obtained by the Raymetrics system
Overview The SkyVUE™PRO LIDAR ceilometer measures cloud height and vertical visibility for meteorological and aviation applications and is ideal for long-term research applications where a high level of detail is required . Telemetry is about automated process by which measurements are made, the data is collected.
Meters: It's a measurement of a resource or in other terms a unit of measurement. Meters are a human readable value, such as CPU utilization per instance. 3. Alarms: These define a trigger that launches once a certain threshold is attained ensuring measurement confidence User-friendly stratocumulus calibration capability and easy test with supplied calibrator plate provided as standard, meaning the unit can be calibrated and easily set up in the field Overview The SkyVUE™8 is a generously specified ceilometer for airports, helipads (on or offshore) and meteorological applications Ceilometer measurements can provide high resolution information on atmospheric conditions such as cloud base height (CBH) and vertical frequency of cloud occurrence (CVF) . The SkyVUE™8 LIDAR Ceilometer is ideal for measuring cloud base heights and vertical visibility at airports, helipads (onshore or offshore), and other meteorological applications. The SkyVUE™8 measures the atmosphere with high stability and repeatibility, providing you with information on cloud base heights, sky condition (up to five layers), vertical visibility, and raw.
A ceilometer such as the Campbell Scientific CS135 (figure 1) may look simple but contains sophisticated optics and signal processing. The low noise signal processing allows measurements of small backscatter signals from aerosols. The optics in this model are based on a relatively large lens allowing a large collection area A unit of irradiance used in measuring the amount of power per area of absorbing surface, or per cross-sectional area of a laser beam. Also called power density
have the unit sent back for calibration. Reliable measurement is further assured by cross checking two separate internal quartz clocks, eliminating the possibility of unidentified errors due to clock drift. The SkyVUE™PRO can be tilted at various angles up to 24°. A small tilt is important as it allows the ceilometer to resist high level . More recently, Roy and Bissonnette  showed that rain extinction coefﬁcients and depolarization ratios varied strongly depending on the lidar zenith angle (0-75 ), demonstrating the importance of performing measurements with constant lidar scan direction
A ceilometer is a device which uses a laser or other Therefore, the ceilometer's measurement of the aerosol layer height gives valuable information about the particle concentration, e.g. PM2.5 fine dust. The diagram to the left shows an Measuring unit heater: 250 W @115/230 VAC Case heater: 150 W @115/230 VAC 450 W (in maximum heating. .dat files retrieved from PC connected to ceilometer Raw data attributes 10 m vertical resolution 15 sec between scans Backscatter recorded in units of (srad*km*105)-1 Data processing Converted to text files using CL-view program and imported into MATLAB. A 240 m vertical, 1800 sec time averaging filter used before plotting. Boundar Ceilometer This telemetry project within OpenStack provides a framework to meter and collect infrastructure metrics such as CPU, network, and storage utilization. This project aims to provide the infrastructure needed to collect measurements within OpenStack, such as physical and virtual resource utilization In Ceilometer, resource usage measurement, e.g., CPU utilization, Disk Read Bytes, etc., is done by meters or counters. Typically there exists a meter for each resource being tracked, and there is a separate meter for each instance of the resource. It is important to note that the lifetime of a meter is decoupledfrom the associated resource. Alarms arise when a fault is identified that prevents measurements from being taken. User-definable alarms include tilt-angle and lead-acid battery shut-down voltage. If the ceilometer senses that these are out of range, it will report alarms in the message string, as well as in the Alarm Flag section of each message
Right: A typical ASOS unit: ASOS Basics and Resources ASOS Technical Info; What is ASOS? Operations and Monitoring Center: ASOS User's Guide Change for Ice Pellets User's Guide Appendices If you have trouble viewing Table 4, and Figures 1, 18-19, see ASOS Charts: ASOS Tech News Page (restricted site Ceilometer measurements can provide high resolution information on atmospheric conditions such as cloud base height (CBH) and vertical frequency of cloud occurrence (CVF). This study presents the first comprehensive analysis of CBH and CVF derived using Vaisala CL51 ceilometers at two urban stations in Seoul, Korea, during a three-year period. Ceilometer project aims to become the infrastructure to collect measurements within OpenStack so that no two agents would need to be written to collect the same data. It's primary targets are monitoring and metering, but the framework should be easily expandable to collect for other needs For many airports and other weather stations, a ceilometer is used to measure the height of the cloud base above the weather station. The ceilometer works by shooting a laser pulse directly upwards and then measures the time it takes for the pulse to return. This time is then used to calculate the distance to the clouds overhead The Vaisala Laser Ceilometer (CEIL) is a self-contained, ground-based, active, remote-sensing device designed to measure cloud-base height, vertical visibility, and potential backscatter signals by aerosols. It detects up to three cloud layers simultaneously. Model CL31 has a maximum vertical range of 7700 meters (m)
The MTECH Systems 8200-CHS Ceilometer is a compact instrument designed for fixed and tactical installations where accurate and reliable cloud height information is required. The measurement is based on the LIDAR principle. The light emitting component is a low power diode laser with the output power limited to a The hard target testis performed by removing the measurement unit from the shield, placing the unit horizontally, turning off tilt angle correction, and detecting the return from a solid object of known distance at least 300 m from the ceilometer Ceilometer CL31 for Cloud Height Detection Features • Measurement range from 0 to 7.6 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. measurement unit, a tilt angle sensor automatically corrects the measured cloud distance reading to vertical cloud base height. The automatic window blower with heater improves performance by keeping the window clean and dry. In cold conditions heating prevents frost generation on the window. • Measurement range from 0 to 7.5 km (from 0 to. An optical fiber based ceilometer for sensing cloud height is disclosed. In a first embodiment, the ceilometer comprises a transmitter based upon optical fibers transmitting an output signal to a target. The transmitter includes a radiation source generating the output signal at a prescribed wavelength or wavelengths. A first waveguide is receptive of the output signal and guides the output.
The Eliasson CBME80 is a stand-alone ceilometer designed on the Lidar principle using a laser diode. The measurement range is 7600 meters with an accuracy of ±1% of the measured distance LiDAR ceilometer light detection and ranging measure clouds ceilometer safety compliance LiDAR laser safety electrical safety air pollution eye safety Product Details With an operational reporting range of 10 km, the SkyVUE PRO is easy to use yet boasts advanced signal processing and unique optical arrangements to provide superior resolution. The cloud effective emissivity measurements were in good agreement with that of the MODIS/AQUA MYD06 Collection 6 (C6) cloud products. The mean difference between them was 0.03, with a linear. An optical fiber based ceilometer (100) for sensing cloud height is disclosed. In a first embodiment, the ceilometer (100) comprises a transmitter based upon optical fibers transmitting an output signal (120) to a target (100d). The transmitter (100a) includes a radiation source (102) generating the output signal (120) at a prescribed wavelength or wavelengths
a Vaisala CL31 ceilometer. Overall good agreement between radiosonde- and aerosol-derived boundary layer heights was found for all methods. The cluster method was found to be particularly sensitive to noise in ceilometer signals and lofted aerosol layers (48.8% of comparisons), while the gradient method showed limitations in low-aerosol. The following example uses the heat client to create an auto-scaling stack and the ceilometer client to measure resources. Create an auto-scaling stack: $ heat stack-create -f cfn/F17/AutoScalingCeilometer.yaml -P KeyName=heat_ke Mile. Definition: A mile (symbol: mi or m) is a unit of length in the imperial and US customary systems of measurement. It is currently defined as 5,280 feet, 1,760 yards, or exactly 1,609.344 meters. History/origin: The mile is an English unit (predecessor of Imperial units and United States Customary Units) of length. The use of the abbreviation m for mile was common before the widespread. The ceilometer measure device for measuring the height of cloud bases and cloud thickness at airports. The LIDAR is a method for measuring distances ranging by illuminating the measurement target with laser light and measuring the time the laser light return to the sensor. - Units: cm- The model was created with the optimal number of.
The Vaisala Ceilometer (VCEIL) is a self-contained, ground-based, active, remote sensing device designed to measure cloud-base height, vertical visibility, and potential backscatter signals by aerosols. It detects up to three cloud layers simultaneously. Model CL31 has a maximum vertical range of 7700 m Charles N. Long, Ph.D. Journal: Atmospheric Measurement Techniques (Impact factor 3.205, journal 15 of 74, 1st Quartile of Meteorology and Atmospheric Sciences category). - Title: Behavior of cloud base height from ceilometer measurements. Authors Ceilometer. Ceilometer is a tool for collecting various statistical data in the OpenStack cloud. The primary goal of the project is to monitor the load and measure the resource consumption by the clients, but the framework features can be extended for other purposes. You can obtain the access to metrics through a separately implemented REST API MARWIS is the first road and runway weather sensor from Lufft detecting road conditions, temperatures, friction and other parameters mobile from a driving vehicle The mobile road weather sensor MARWIS turns vehicles into driving weather stations by detecting several critical road and runway weather parameters. It can be installed on vehicles with 1 - 2m [ In case of ceilometer measurements the lo w signal and. high noise lev el (see Sect. 5) abov e 5 km makes this cali-bration difﬁcult. An example of different reference height
In general, computer performance is compared in FLOPS (Floating Point Operations Per Second). A top super computer today is in the order of 10 PFLOPS (Peta FLOPS), or 10,000,000,000,000,000 FLOPS. That is a lot! To give some perspective the CRAY-1.. Since we don't have a full repo of ceilometer, we setup the ceilometer repo in venv and copy monasca integration files in there, and run the unit tests over that code. At present this is tested against ceilometer stable/pike branch, if you need to test against different branch you can change it in test-requirements.txt. Relevant files are The international standard unit of length, approximately equivalent to 39.37 inches. It was redefined in 1983 as the distance traveled by light in a vacuum in 1/299,792,458 of a second. See Table at measurement Aerosol Lidar Ceilometer a modern airport ground support high tech service a special atmospheric aerosol measure equipment. The LIDAR is a specialized method for measuring distances ranging by illuminating the target object with laser light and measuring the time the laser light return to the sensor high as 2s. The ceilometer is connected to a PC computer for automated data storage and display (Fig. 2b). An application (CL-VIEW) is used to visualise the data for monitoring opera-tion of the ceilometer during the measurement period. Depending on weather conditions and burn intensity, in this study the ceilometer was located 3-10km. Since ceilometer is a vertically pointing laser, there are times when ceilometer miss clouds in mostly clear or partly cloudy conditions, usually under conditions of widely scattered fair weather cumulus (NWS, 1998). However, model in a 32‐km box will catch these cloud bases, thus resulting in an overestimation of CBF