©2020 Biological and Chemical Oceanography Data Management Office.Funded by the U.S. National Science Foundation
©2020 Biological and Chemical Oceanography Data Management Office.Vaisala RS80-GPS radiosondes carried aloft by helium balloons measure atmospheric temperature, humidity, wind speed and direction. The GPS receiver of the GPS-radiosonde measures a shift in Doppler frequencies using a codeless detection and measurement technique. The measured Doppler shifts are a combination of satellite and radiosonde motion and contain the pertinent information for wind speed and
direction computation. Doppler frequency measurements of up to 8 satellites are sent to the ground equipment using a low bandwidth (1200 baud) digital link. New independent GPS Doppler measurements from the GPS-sonde are provided every 0.5 seconds for up to 8 channels with 24-bit resolution. The ground equipment computes the wind
speed and direction using the differential GPS concept. For more information see www.hobeco.net/pdf/RS80_GPS.pdf.
| Dataset Name | PI-Supplied Description | PI-Supplied Name |
|---|---|---|
| Radiosonde profiles of atmospheric temperature, humidity, wind speed and direction from R/V Tangaroa cruise VDT0410 in the South East of New Zealand, S.W. Bounty Trough in 2004 (SAGE project) | Radiosondes Profiles of atmospheric temperature, humidity, wind speed and direction were measured using Vaisala RS80-GPS radiosondes carried aloft by helium balloons. A list of radiosonde launches is given as the data file list. The data are transmitted from the sonde to a shipboard receiver and these are stored at 2-s intervals by computer. This sampling gives good height resolution in the atmospheric boundary layer, which is under the direct influence of the fluxes through the sea surface. The radiosondes were generally launched to coincide with the overpasses of the NASA Aqua earth observation satellite, as the atmospheric profiles derived from the radiosondes can be used to validate satellite retrievals of atmospheric temperature and humidity distributions. | Radiosonde |