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Advancing Precision in Cloud Particle Analysis

The Hyper-Angular Cloud Polarimeter (HACP) is a state-of-the-art laser-based optical instrument designed for advanced cloud research. It enables non-contact, in-situ measurements of cloud particle ensembles, delivering highly precise data on their angular light scattering and polarization properties.

Applications
Applications&Features
  • Versatile Deployment

  • Non-Contact Measurements

  • Cloud Droplet Size Distribution

  • Real-time Cloud Phase Information

  • Validation of Optical Models for Non-Spherical Particles

Features
  • High Angular Resolution: Precise measurement from 101.5° to 168.5°, with a resolution better than 0.1°.

  • Comprehensive Data: Captures the full scattering phase matrix, including the six independent matrix elements.

  • Durability and Reliability: Designed for indoor and outdoor use, featuring IP66 protection against dust and water.

  • Safe and Non-Invasive: Powered by a Class 2 laser system, safe for trained personnel.

Specifications
Specifications

Concept

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Angular Resolution

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Accuracy & Precision

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Measurement Range

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Laser Wavelength

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Temperature

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Storage Temperature

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​Humidity

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Storage Humidity

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IP Protection Rating

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Precipitation

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Installation Place​

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Installation Space

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Altitude

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Gases

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The HACP is a cutting-edge laser-based optical instrument designed for precise, non-contact measurement of cloud particle scattering properties to advance atmospheric research and climate modeling.

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< 0.1°

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10% and 3%

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101.5° to 168.5°

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515 nm

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- 40°C to + 40°C (heating system in operation)

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- 25°C to + 55°C (or shortly up to +70°C for periods less than 24h)

 

20% to 100% relative humidity (r.h.)

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< 80% (non-condensing)

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IP66: dust-tight and protected against strong water jets

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Light and brief precipitation is permitted. In the event of heavy, prolonged precipitation or extreme weather conditions, it is recommended to power off the device and protect it from direct water exposure.

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Outside or indoor installation

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Approximately 5 m2

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< 3000 m asl

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Non-explosive atmospheres

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Operation
Operation
Schema aufbau.png

Schematic diagram of the HACP measurement setup

The HACP operates by emitting a laser beam with a defined and adjustable polarization state through the Sending Unit. As the beam interacts with...

References
References
ESA_BIC_BadenWuerttemberg_DS.png

SchnaiTEC GmbH is participating in the ESA Business Incubation Centre in Baden-Württemberg.

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