CLAMPS: Instrumentation

CLAMPS1

CLAMPS-1 was funded by the NSF, NSSL, and OU, and was constructed in 2015. It is collaboratively maintained and operated by OU and NSSL.

Doppler LIDAR

LIDAR

Doppler LIDAR measures the radial velocity of atmospheric scatterers, which are primarily small aerosol particles that trace atmospheric motion, as a function of distance from the lidar. Measurements along different azimuth and elevation directions using the 3d scanner allow horizontal wind speed and direction to be derived. Turbulence profiles can also be derived using repeated vertically pointing measurements. CLAMPS1 is equipped with a Halo Photonics Streamline Doppler lidar, which is a fully-scanning, eye-safe, lidar operating at 1.9 µm. This lidar is capable of 18-m gate resolution, has a 38 m/s nyquist limit, and has a max range of 7-10km. Scan stategies are entirely user configurable.

Atmospheric Emitted Radiance Interferometer

AERI

The Atmospheric Emitted Radiance Interferometer (AERI) measures downwelling infrared radiance from 3-19 µm at high spectral resolution. Profiles of temperature and water vapor are retrieved from these observations, as well as cloud properties and trace gas information. Two blackbody targets maintain calibration to better than 1%. These measurements are used in a thermodynamic retreival algortihm (either AERIoe or TROPoe). AERI systems are essentially identical between the CLAMPS facilities.

Microwave Radiometer

Microwave Radiometer

The Microwave Radiometer measures downwelling microwave radiance from 22 to 60 GHz in 10-20 channels (depending on model/configuration). Profiles of temperature and water vapor are retrieved from these observations. The MWR has lower vertical resolution than the AERI, but is able to get some information through clouds. These measurements are used in a thermodynamic retreival algortihm (either AERIoe or TROPoe). CLAMPS1 is equiped with a RPG HATPRO microwave radiometer.

Additional Capabilities

Person launching weather balloon

CLAMPS1 also includes a surface meteorological station, and supports radiosonde ballooning. It is an air-conditioned trailer with room for up to 4 people to work. An integrated generator is able to supply system power during short deployments and during transit. For longer deployments, CLAMPS operates on 220V/50A shore power. The CLAMPS onboard datasystem ingests and processes instrument data feeds in real-time.

CLAMPS2

CLAMPS-2 was built in early 2016 with funding from NSSL. It is maintained and operated by NSSL and CIMMS scientists, but collaborates often with CLAMPS1.

Doppler LIDAR

LIDAR

Doppler LIDAR measures the radial velocity of atmospheric scatterers, which are primarily small aerosol particles that trace atmospheric motion, as a function of distance from the lidar. Measurements along different azimuth and elevation directions using the 3d scanner allow horizontal wind speed and direction to be derived. Turbulence profiles can also be derived using repeated vertically pointing measurements. CLAMPS2 is equipped with a Halo Photonics Streamline XR+ Doppler lidar, which is a fully-scanning, eye-safe, lidar operating at 1.9 µm. This lidar is capable of 18-m gate resolution, has a 38 m/s nyquist limit, and has a max range of 12km. Scan stategies are entirely user configurable.

Atmospheric Emitted Radiance Interferometer

AERI

The Atmospheric Emitted Radiance Interferometer (AERI) measures downwelling infrared radiance from 3-19 µm at high spectral resolution. Profiles of temperature and water vapor are retrieved from these observations, as well as cloud properties and trace gas information. Two blackbody targets maintain calibration to better than 1%. These measurements are used in a thermodynamic retreival algortihm (either AERIoe or TROPoe). AERI systems are essentially identical between the CLAMPS facilities.

Microwave Radiometer

Microwave Radiometer

The Microwave Radiometer measures downwelling microwave radiance from 22 to 60 GHz in 10-20 channels (depending on model/configuration). Profiles of temperature and water vapor are retrieved from these observations. The MWR has lower vertical resolution than the AERI, but is able to get some information through clouds. These measurements are used in a thermodynamic retreival algortihm (either AERIoe or TROPoe). Currently, CLAMPS2 does not have a microwave radiometer. From 2016-2019, a Radiometrics MP-3000A operated in the facility.

Additional Capabilities

Person preparing weather balloon for launch

CLAMPS2 also includes a surface meteorological station, and supports radiosonde ballooning. It is an air-conditioned trailer with room for up to 4 people to work. An integrated generator is able to supply system power during short deployments and during transit. For longer deployments, CLAMPS operates on 220V/50A shore power. The CLAMPS onboard datasystem ingests and processes instrument data feeds in real-time.