Assist-II

Atmospheric Sounder Spectrometer by Infrared Spectral Technology

The ASSIST II is the field deployable sounder that the atmospheric community has been waiting for. It is the first product that includes a self-calibrating spectroradiometer, a network-enabled control software that can operate from anywhere in the world and an integrated data processing pipeline that generates in near real time the end products that you need, autonomously.

Benefits
  • Works out of the box: Highly integrated hardware and software (Edgar) allows you to install your instrument virtually anywhere. Turn the instrument on and it will start sounding the atmosphere and send you relevant data!
  • Trust your results: End-to-end performance validated in the field by the scientific community
  • Manipulate less data: Produces atmospheric parameter profiles directly, not only interferograms or spectra
  • See further: Highest sensing performances available, using state-of-the-art technology and software algorithms
  • Use less manpower: True unattended 24/7 operation, with tools to help you keep track of its operation.
  • Work from anywhere: 100% remotely controllable
Features
  • Measures temperature, water vapor, O3 CO, CO2, CH4 and NOx vs altitude (Atmospheric profiles)
  • Generate temperature and moisture profile every 2 minutes (near real time)
  • High accuracy measurements for weather applications
  • High vertical resolution and high temporal resolution
  • Integrated and automatic radiometric calibration
  • Extensive instrument health monitoring
  • Network-centered architecture
  • Extensive remote monitoring for maintenance
  • Accepts additional user devices via the built-in USB, LVDS, and CameraLink interfaces
  • Rugged construction (field deployable)
Specifications

Michelson interferometer :

  • Spectral range: 500 to 5,000 cm-1 (Optional extended range from 400 to 5,000 cm-1)
  • Single plate KBr beamsplitter (self compensated);
  • Nominal beam diameter at beam stop: 2.54 cm.
  • Maximum beam divergence is 45 milliradians full angle;
  • Throughput: 0.00805 sr cm2
  • Spectral sampling: 0.5 cm-1;
  • HeNe laser metrology system (for digital sampling and mirror velocity control) mounted on pre-aligned assembly for easy replacement);
  • Sampling rate (laser fringe rate: 32khz to 100 kHz, computer selectable)

Offer 3 optimized scan speeds:

  • 32KHz (1.14 scan/sec.)
  • 50KHz (1.8 scans/sec.)
  • 100KHz (3.56 scan/sec.)

Mirror speed stability:

  • 5% rms at 100KHz
  • 1% rms at <50KHz

Communication interface:
Ethernet;
 
Calibration unit:
2 high emissivity blackbodies are permanently mounted on the ASSIST II. They are automatically selected according to the desired calibration sequence.

Blackbody:

Effective Emissivity >0.9998
Temperature Range ambient to 70.00oC
Radiance uncertainty <±0.005 K
Temperature Display Resolution (as  per controller BC-231)
Temperature Stability 0.005C° over 120 sec.
Temperature Gradient <0.35C
Temperature Setting Resolution 0.001C°
Temperature knowledge ± 0.1 K° Absolute
Aperture diameter 2,75 inch
Publications
Brochures
Contact us to get more details