Skip to data content Skip to data search



The objective of CHATS was to make spatial measurements of the velocity and scalar turbulence fields in a uniformly vegetated canopy, using arrays of sonic anemometer/thermometers augmented with fast response water vapor and carbon dioxide sensors. With this spatial information, the three-dimensional fields of velocity and scalar fluctuations can be studied to quantify turbulence transport processes and coherent structures throughout the canopy layer. An ancillary goal was to characterize the turbulent structure of the fields of wind, temperature, humidity, and trace chemical species within and above the orchard canopy.

The main sonic array was supplemented with a 30-m vertical profile of 16 sonic anemometers and 12 hygrothermometers, extending from near the surface, through the canopy and roughness sublayer, to well above canopy top. Also requested are fast-response static pressure sensors and hot-wire/film anemometers to be collocated with the sonic anemometers in the horizontal array, as well as a digital camera system to measure leaf area index (LAI). Finally radiation and soil measurements were made to complete the thermal energy budget of the canopy.

This dataset contains Sound Detection and Ranging (SODAR) data collected by the NCAR/EOL Integrated Sounding System (ISS) during the CHATS campaign and is available in raw ASCII format. These data have not been quality-controlled.

Data access

  • ORDER data for delivery by FTP

Additional information

Data Quality final
  • 1.0 (2016-06-08)
Subscribe Subscribe to receive email when new or updated data is available.
Related projects
Frequency continuous
Language English
GCMD Science Keywords Expand keywords
Related links

Temporal coverage

Begin datetime 2007-03-07 00:00:00
End datetime 2007-06-14 23:59:59

Spatial coverage

Map data from IBCSO, IBCAO, and Global Topography.

Maximum (North) Latitude: 38.00, Minimum (South) Latitude: 38.00
Minimum (West) Longitude: -121.00, Maximum (East) Longitude: -121.00

Primary point of contact information

EOL Data Support <>

Additional contact information


UCAR/NCAR - Earth Observing Laboratory, Brown, W. 2016. CHATS ISS SODAR Data. Version 1.0. UCAR/NCAR - Earth Observing Laboratory. Accessed 24 May 2024.

Today's date is shown: please replace with the date of your most recent access.

Additional citation styles

The citation text below is from the DataCite Content Resolver service and may take a few seconds to load. The styles and locales are obtained from CrossCite, which also provides a citation formatter. See ReFindit for another alternative. Formatting is not perfect: please verify and edit before use. Today's date is shown: please replace with the date of your most recent access.

Style: Locale:

Ancillary information

Metadata download

Note that your browser may not display the above metadata links, but automatically save them as files in a folder such as "Downloads"