edu.ucar.eol::129.005 eng; USA utf8 dataset EOL Data Support NSF NCAR Earth Observing Laboratory EOL Data Support PO Box 3000 Boulder CO 80307-3000 datahelp@eol.ucar.edu https://data.eol.ucar.edu/ homepage pointOfContact 2026-04-09T21:19:59Z ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://doi.org/10.26023/P4JW-9T0T-QG0S https://data.eol.ucar.edu/file/download/546DFF4FCA293/CHATS_summaryHighRateData-Disclaimer.pdf https Documentation #1 CHATS_summaryHighRateData-Disclaimer.pdf information https://data.eol.ucar.edu/file/download/546DFF4FCA298/ISFS_Operations_at_CHATS.pdf https Documentation #2 ISFS_Operations_at_CHATS.pdf information https://data.eol.ucar.edu/dataset/129.001 https 129.001 is superseded by dataset 129.005 information https://data.eol.ucar.edu/dataset/129.002 https 129.002 is superseded by dataset 129.005 information ISFS High Rate Tower and Array Surface Meteorology and Flux Products 129.005 2019-11-21T17:54:16Z publication 2.0 2019-11-21T17:54:16Z ISFS High Rate Tower and Array Surface Meteorology and Flux Products 2019-11-21T17:54:16Z creation NSF NCAR Earth Observing Laboratory EOL Data Support PO Box 3000 Boulder CO 80307-3000 datahelp@eol.ucar.edu https://data.eol.ucar.edu/ homepage resourceProvider 129.005 doi:10.26023/P4JW-9T0T-QG0S NSF NCAR Earth Observing Laboratory EOL Data Support PO Box 3000 Boulder CO 80307-3000 datahelp@eol.ucar.edu https://data.eol.ucar.edu/ homepage publisher Thomas W. Horst NSF NCAR Earth Observing Laboratory ATD Boulder Colorado 80307 USA horst@ucar.edu originator Steve Oncley NSF NCAR Earth Observing Laboratory 303-497-8757 P.O. Box 3000 Boulder CO 80307-3000 USA oncley@ucar.edu originator NSF NCAR/EOL Integrated Surface Flux System Team author ISFS CHATS High rate Data The operations and measurements of the ISFS (formerly called ISFF) at CHATS are documented in the CHATS home page, at https://www.eol.ucar.edu/field_projects/chats. ISFS data are typically made available in NetCDF form, The format of ISFS NetCDF files is documented at https://www.eol.ucar.edu/content/isfs-netcdf-files. The ISFS variable naming convention is discussed at https://www.eol.ucar.edu/content/isfs-variable-names. DATA DISCLAIMER Time-tags The time-tag associated with each sensor sample was read from the data system clock when each sample was received. Unfortunately the ISFS data systems were using a faulty method to maintain the accuracy of their clocks, and as a result the sample time-tags were frequently in error on the order of a second, with both backward and forward discontinuities. This problem could have been significantly improved in post-processing, but the raw archive data files were sorted in time, placing the samples out-of-order in the archive. The original, unsorted archive files are no longer available. Samples from Campbell CSAT3 sonic anemometers contain a 6 bit sequence number (0-63), which provides a way to re-order the anemometer samples, and then assign corrected time-tags. This is a best-effort correction and a small fraction of samples may still be out-of-order with incorrect time tags. This re-ordering also resulted in some samples to be discarded when no correction could be determined. Values from the krypton hygrometers were recorded with the sonic anemometer samples, and so those have been corrected. Time-tag corrections to 10/sec samples from the Licor 7500 H2O/CO2 analyzers were not possible. In addition, no corrections were applied to time-tags of the remaining sensors, those sampled at 1/sec or less. Only the sonics’ time stamp has been corrected (time is sequential). Analyses using sensor data on their own should be fine, such as validation with other instruments and models. Time averaging (~5-10 min) may be needed for variables where the unresolved time offset remains. Please note, the time stamp offsets will affect cross correlations, power spectrums, etc. where high rate time resolved data is important and thus such analyses on instantaneous data is not recommended. Dataset “hr_qc_geo_tiltcor_shadowcor60” The high-rate NetCDF files contain data from all primary sensors deployed at CHATS by ISFS, at the sampling rate of each sensor. Sonic anemometers were operated at 60 samples per second, and the majority of the remaining sensors sampled at 1 sps. As noted above, time-tag corrections to water vapor and carbon dioxide samples from Licor 7500’s were not possible and these data have been removed. 3-D Wind Data from Sonic Anemometers The u, v and w components of wind vectors have been corrected for the estimated tilt of the sonic anemometers, as discussed under Sonic Anemometers and Sensor Notes in the CHATS home page. Components u and v have then been rotated from instrument coordinates to geographic coordinates, where +u is wind to the east, +v is wind to the north, using the anemometer orientation, as described in the sensor notes. Files and Downloads: The typical data file size range is between 300 - 550 Mbytes unzipped. If your request is larger than permitted, please adjust the data period to obtain a smaller chop of the data, and repeat downloads to get all data. completed EOL Data Support NSF NCAR Earth Observing Laboratory EOL Data Support PO Box 3000 Boulder CO 80307-3000 datahelp@eol.ucar.edu https://data.eol.ucar.edu/ homepage pointOfContact NSF NCAR Earth Observing Laboratory EOL Data Support PO Box 3000 Boulder CO 80307-3000 datahelp@eol.ucar.edu https://data.eol.ucar.edu/ homepage pointOfContact netCDF compressed with GNU Zip (.gz) (application/x-gzip) dataset theme Resource Type 2014-10-16 revision 3.1 DataCite Metadata Working Group originator resourceTypeGeneral Flux Tower NCAR/EOL Integrated Surface Flux Facility - ISFF platform Surface EARTH SCIENCE > CLIMATE INDICATORS > LAND SURFACE/AGRICULTURE INDICATORS > SOIL TEMPERATURE EARTH SCIENCE > AGRICULTURE > SOILS > SOIL TEMPERATURE EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY > CARBON AND HYDROCARBON COMPOUNDS > ATMOSPHERIC CARBON DIOXIDE EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WATER VAPOR > WATER VAPOR INDICATORS > WATER VAPOR EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC RADIATION > SHORTWAVE RADIATION EARTH SCIENCE > AGRICULTURE > SOILS > ELECTRICAL CONDUCTIVITY EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC RADIATION > HEAT FLUX EARTH SCIENCE > LAND SURFACE > SOILS > SOIL TEMPERATURE EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC RADIATION > LONGWAVE RADIATION EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WATER VAPOR > WATER VAPOR PROCESSES > EVAPOTRANSPIRATION EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC RADIATION > NET RADIATION EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC RADIATION > OUTGOING LONGWAVE RADIATION EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WINDS > SURFACE WINDS > WIND SPEED EARTH SCIENCE > LAND SURFACE > SOILS > THERMAL CONDUCTIVITY EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC RADIATION > RADIATIVE FLUX EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC TEMPERATURE > SURFACE TEMPERATURE > DEW POINT TEMPERATURE EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WINDS > SURFACE WINDS > WIND DIRECTION EARTH SCIENCE > AGRICULTURE > SOILS > THERMAL CONDUCTIVITY EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC TEMPERATURE > SURFACE TEMPERATURE > AIR TEMPERATURE EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC PRESSURE > SURFACE PRESSURE EARTH SCIENCE > LAND SURFACE > SOILS > SOIL MOISTURE/WATER CONTENT EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC WATER VAPOR > WATER VAPOR INDICATORS > HUMIDITY > SPECIFIC HUMIDITY Global Change Master Directory (GCMD) 2018-02-27 revision 8.5 National Aeronautics and Space Administration originator none none grid eng climatologyMeteorologyAtmosphere -121.00000 -121.00000 38.00000 38.00000 2007-03-13T16:00:00Z 2007-06-12T23:59:59Z NSF NCAR Earth Observing Laboratory EOL Data Support PO Box 3000 Boulder CO 80307-3000 datahelp@eol.ucar.edu https://data.eol.ucar.edu/ homepage distributor 184593 https://data.eol.ucar.edu/dataset/129.005 https ISFS High Rate Tower and Array Surface Meteorology and Flux Products homepage Dataset homepage https://data.eol.ucar.edu/cgi-bin/codiac/fgr_form/id=129.005 https ISFS High Rate Tower and Array Surface Meteorology and Flux Products Data Order Form Dataset order request form. Data files are made available via HTTPS. order