SkyDOAS
The SkyDOAS (Sky Differential Optical Absorption Spectroscopy) instrument system measures atmospheric emissions (flux) of SO2, NO2 and HCHO using zenith-scattered solar UV-light (SkyDOAS). The system consists of a UV-Spectrometer Unit and a Solar Telescope. The system also includes a control unit, an optical fiber and a mounting beam. IT-infrastructure including GPS-receiver, computer and monitor can also be provided on request.
Note: the SkyDOAS system requires a mobile platform (vehicle) with zenith sky access of the Solar Telescope.
Note: Local wind measurements are needed for the flux calculations.
| Specifications (Standard Configuration) | |
| Units (version) | SkyDOAS Telescope (v2) Spec. Unit -S (v2) SkyDOAS Control Unit (v2) |
| Measurement Principle | Passive, Open Path |
| Measured Quantity (unit) | Vertical Path Integrated Concentration (mg/m2) |
| Light Source | Zenith Sky (Scattered Sunlight) |
| Calibration Source | Internal Hg-lamp |
| Optical FOV | 20 mRad |
| Spectrometer Type | Czerny-Turner Grating Spectrometer |
| Detector Type | CCD |
| Spectral Range | UV: 290 - 390 nm |
| Spectral Resolution | 0.44-0.64 nm |
| Standard Species & Detection Limits (mg/m2) |
Sulphur Dioxide - SO2 (7) Nitrogen Dioxide - NO2 (5) Formaldehyde - HCHO (5) |
| Additonal Species | |
| Sampling Time | 1-5 s |
| Housing | Powder Coated Aluminium (RAL9003) |
| Dimensions W x H x D | 55 x 55 x 250 mm- Telescope 304 x 462 x 370 mm - Spec Unit - S 130 x 160 x 70 mm - Control Unit |
| Weight | 0.9 kg - Telescope 17 kg - Spec Unit -S 1.2 kg - Control Unit |
| Operational Environment | Temperature: 5-35°C Relative Humidity: 0-90% (non-condensing) |
| Vibration Suppression | Rubber Mounts |
| Internal Temp. Regulation | Cooling (Peltier Element) |
| Supply Voltage | 100-240V AC, 50/60 Hz, & 10-14V DC |
| Nominal Power | 70 W |
| Data Interface | USB-B / Ethernet (RJ45) |
| Software | FluxMeasureTM, FluxReportTM |
| Main Accessories | Measurement Computer, GPS Receiver, Optical Fiber, Wind Station, Wind Mast, Spare Parts & Tool Kit |
