# Measurement differences between air temperature instruments used at H.J. Andrews meteorological stations ## Dataset - **Database Code:** MS048 - **Title:** Measurement differences between air temperature instruments used at H.J. Andrews meteorological stations - **Abstract:** The PRIMET Horizontal Radiation Shield Comparison (PHRSC) experiment compares the difference between the air temperature measurements of a reference temperature sensor inside a fan aspirated radiation shield and temperature sensors located inside passively aspirated radiation shields including a cotton region shelter, Gill multi-plate shield, and a custom-fabricated model. Observed variables include air temperature, wind speed, and incoming and reflected solar radiation. Data was collected in the field between 2010 and 2017 at the Primary Meteorological Station (PRIMET) at H.J. Andrews Experimental Forest, located in Oregon’s Western Cascades (44.21, -122.26, elevation 430m). - **Keywords:** air temperature; maximum temperature - **Temporal coverage:** 2010-07-30 to 2017-04-27 - **Principal Investigator:** Mark D Schulze ## Data Entities 1. MS04801 2. MS04802 3. MS04803 4. MS04804 ## Entity 1: MS04801 ### Attribute list - **DBCODE** — varchar, enum FSDB Database Code (MS048) - **MS048** — FSDB Database Study Code - **ENTITY** — numeric(1), range 1.0000 1.0000, number Entity number - **SITE** — varchar, enum Site where data collected - **PRIMET** — Primary Meteorological Station - **DATE_TIME** — datetime, freetext Date and time collected - **ASPIRATED_MEAN** — numeric(1), range -16.1000 40.4000, degrees Celsius Mean air temperature measurement for interval sampled by a Campbell Scientific model 107 thermistor housed in a R.M. Young Model 43502-L compact aspirated shield at 150 cm height - **ASPIRATED_MEAN_FLAG** — varchar, enum Rows flagged for QA issues, including missing and out of range values - **A** — Accepted value has passed all QC tests applied as represented by the quality level - **M** — Missing value - **Q** — Questionable value, including out of range values - **CRS_MEAN** — numeric(1), range -16.8000 41.5000, degrees Celsius Mean air temperature measurement for interval sampled by a Campbell Scientific model 107 thermistor housed in a NovaLynx 380-605 large instrument (cotton region) shelter at 150 cm height - **CRS_MEAN_FLAG** — varchar, enum Rows flagged for QA issues, including missing and out of range values - **A** — Accepted value has passed all QC tests applied as represented by the quality level - **M** — Missing value - **Q** — Questionable value, including out of range values - **GILL_MEAN** — numeric(1), range -17.0000 41.5000, degrees Celsius Mean air temperature measurement for interval sampled by a Campbell Scientific model 107 thermistor housed in a R.M. Young 41303-5A 6-plate radiation shield at 150 cm height - **GILL_MEAN_FLAG** — varchar, enum Rows flagged for QA issues, including missing and out of range values - **A** — Accepted value has passed all QC tests applied as represented by the quality level - **M** — Missing value - **Q** — Questionable value, including out of range values - **HJA_MEAN** — numeric(1), range -17.1000 43.0000, degrees Celsius Mean air temperature measurement for interval sampled by a Campbell Scientific model 107 thermistor housed in a locally designed radiation shield at 150 cm height (8-inch long, 3.5 inch diameter, schedule 40 PVC pipe split in half lengthwise - **HJA_MEAN_FLAG** — varchar, enum Rows flagged for QA issues, including missing and out of range values - **A** — Accepted value has passed all QC tests applied as represented by the quality level - **M** — Missing value - **Q** — Questionable value, including out of range values ## Entity 2: MS04802 ### Attribute list - **DBCODE** — varchar, enum FSDB Database Code (MS048) - **MS048** — FSDB Database Study Code - **ENTITY** — numeric(1), range 2.0000 2.0000, number Entity number - **SITE** — varchar, enum Site where data collected - **PRIMET** — Primary Meteorological Station - **DATE_TIME** — datetime, freetext Date and time collected - **SOLAR_MEAN** — numeric(1), range 0.0000 1112.0000, watt per m2 Mean incoming solar radiation for interval is measured by a Kipp and Zonen solar radiation pyranometer, model CM3, with a Campbell Scientific data logger at 150 cm height - **SOLAR_MEAN_FLAG** — varchar, enum Rows flagged for QA issues, including missing and out of range values - **A** — Accepted value has passed all QC tests applied as represented by the quality level - **M** — Missing value - **Q** — Questionable value, including out of range values - **REF_SOLAR_MEAN** — numeric(1), range 0.0000 546.0000, watt per m2 Mean reflected solar radiation for interval is measured by a downward-facing Kipp and Zonen solar radiation pyranometer, model CM3, with a Campbell Scientific data logger at 150 cm height - **REF_SOLAR_MEAN_FLAG** — varchar, enum Rows flagged for QA issues, including missing and out of range values - **A** — Accepted value has passed all QC tests applied as represented by the quality level - **M** — Missing value - **Q** — Questionable value, including out of range values - **WSPD_MEAN** — numeric(1), range 0.0000 2.0000, meters per second Mean wind speed for interval is measured by an RM Young Model 05103 Wind Monitor mounted to the tower at 150 cm with a Campbell Scientific data logger. - **WSPD_MEAN_FLAG** — varchar, enum Rows flagged for QA issues, including missing and out of range values - **A** — Accepted value has passed all QC tests applied as represented by the quality level - **M** — Missing value - **Q** — Questionable value, including out of range values - **B** — Wind speed measurement is below or equal to the instrument detection limit of 1 m per second - **NB** — Wind speed measurement is below or equal to 0.3 m per second and is not considered reliable and is below the instrument detection limit of 1 m per second ## Entity 3: MS04803 ### Attribute list - **DBCODE** — varchar, enum FSDB Database Code (MS048) - **MS048** — FSDB Database Study Code - **ENTITY** — numeric(1), range 3.0000 3.0000, number Entity number - **SITE** — varchar, enum Site where data collected - **PRIMET** — Primary Meteorological Station - **DATE_TIME** — datetime, freetext Date and time collected - **ASPIRATED_MEAN** — numeric(1), range -13.0000 226.0000, degrees Celsius Mean air temperature measurement for interval sampled by a Campbell Scientific model 107 thermistor housed in a R.M. Young Model 43502-L compact aspirated shield at 150 cm height - **ASPIRATED_MEAN_FLAG** — varchar, enum Rows flagged for QA issues, including missing and out of range values - **A** — Accepted value has passed all QC tests applied as represented by the quality level - **M** — Missing value - **Q** — Questionable value, including out of range values - **ASPIRATED_MAX** — numeric(1), range -12.8000 156.7000, degrees Celsius Maximum air temperature measurement for a 5-minute interval sampled by a Campbell Scientific model 107 thermistor housed in a R.M. Young Model 43502-L compact aspirated shield at 150 cm height - **ASPIRATED_MAX_FLAG** — varchar, enum Rows flagged for QA issues, including missing and out of range values - **A** — Accepted value has passed all QC tests applied as represented by the quality level - **M** — Missing value - **Q** — Questionable value, including out of range values - **ASPIRATED_MIN** — numeric(1), range -13.2000 40.1000, degrees Celsius Minimum air temperature measurement for a 5-minute interval sampled by a Campbell Scientific model 107 thermistor housed in a R.M. Young Model 43502-L compact aspirated shield at 150 cm height - **ASPIRATED_MIN_FLAG** — varchar, enum Rows flagged for QA issues, including missing and out of range values - **M** — Missing value - **Q** — Questionable value, including out of range values - **A** — Accepted value has passed all QC tests applied as represented by the quality level - **CRS_MEAN** — numeric(1), range -13.3000 41.7000, degrees Celsius Mean air temperature measurement for interval sampled by a Campbell Scientific model 107 thermistor housed in a NovaLynx 380-605 large instrument (cotton region) shelter at 150 cm height - **CRS_MEAN_FLAG** — varchar, enum Rows flagged for QA issues, including missing and out of range values - **A** — Accepted value has passed all QC tests applied as represented by the quality level - **M** — Missing value - **Q** — Questionable value, including out of range values - **CRS_MAX** — numeric(1), range -13.3000 41.9000, degrees Celsius Maximum air temperature measurement for a 5-minute interval sampled by a Campbell Scientific model 107 thermistor housed in a NovaLynx 380-605 large instrument (cotton region) shelter at 150 cm height - **CRS_MAX_FLAG** — varchar, enum Rows flagged for QA issues, including missing and out of range values - **A** — Accepted value has passed all QC tests applied as represented by the quality level - **M** — Missing value - **Q** — Questionable value, including out of range values - **CRS_MIN** — numeric(1), range -94.2000 41.5000, degrees Celsius Minimum air temperature measurement for a 5-minute interval sampled by a Campbell Scientific model 107 thermistor housed in a NovaLynx 380-605 large instrument (cotton region) shelter at 150 cm height - **CRS_MIN_FLAG** — varchar, enum Rows flagged for QA issues, including missing and out of range values - **A** — Accepted value has passed all QC tests applied as represented by the quality level - **M** — Missing value - **Q** — Questionable value, including out of range values - **GILL_MEAN** — numeric(1), range -13.6000 74.2000, degrees Celsius Mean air temperature measurement for interval sampled by a Campbell Scientific model 107 thermistor housed in a R.M. Young 41303-5A 6-plate radiation shield at 150 cm height - **GILL_MEAN_FLAG** — varchar, enum Rows flagged for QA issues, including missing and out of range values - **A** — Accepted value has passed all QC tests applied as represented by the quality level - **M** — Missing value - **Q** — Questionable value, including out of range values - **GILL_MAX** — numeric(1), range -13.5000 68.4000, degrees Celsius Maximum air temperature measurement for a 5-minute interval sampled by a Campbell Scientific model 107 thermistor housed in a R.M. Young 41303-5A 6-plate radiation shield at 150 cm height - **GILL_MAX_FLAG** — varchar, enum Rows flagged for QA issues, including missing and out of range values - **A** — Accepted value has passed all QC tests applied as represented by the quality level - **M** — Missing value - **Q** — Questionable value, including out of range values - **GILL_MIN** — numeric(1), range -38.0000 41.3000, degrees Celsius Minimum air temperature measurement for a 5-minute interval sampled by a Campbell Scientific model 107 thermistor housed in a R.M. Young 41303-5A 6-plate radiation shield at 150 cm height - **GILL_MIN_FLAG** — varchar, enum Rows flagged for QA issues, including missing and out of range values - **A** — Accepted value has passed all QC tests applied as represented by the quality level - **M** — Missing value - **Q** — Questionable value, including out of range values - **HJA_MEAN** — numeric(1), range -14.0000 43.1000, degrees Celsius Mean air temperature measurement for interval sampled by a Campbell Scientific model 107 thermistor housed in a locally designed radiation shield at 150 cm height (8-inch long, 3.5 inch diameter, schedule 40 PVC pipe split in half lengthwise - **HJA_MEAN_FLAG** — varchar, enum Rows flagged for QA issues, including missing and out of range values - **A** — Accepted value has passed all QC tests applied as represented by the quality level - **M** — Missing value - **Q** — Questionable value, including out of range values - **HJA_MAX** — numeric(1), range -13.9000 43.5000, degrees Celsius Maximum air temperature measurement for a 5-minute interval sampled by a Campbell Scientific model 107 thermistor housed in a locally designed radiation shield at 150 cm height (8-inch long, 3.5 inch diameter, schedule 40 PVC pipe split in half lengthwis - **HJA_MAX_FLAG** — varchar, enum Rows flagged for QA issues, including missing and out of range values - **A** — Accepted value has passed all QC tests applied as represented by the quality level - **M** — Missing value - **Q** — Questionable value, including out of range values - **HJA_MIN** — numeric(1), range -109.0000 42.8000, degrees Celsius Minimum air temperature measurement for a 5-minute interval sampled by a Campbell Scientific model 107 thermistor housed in a locally designed radiation shield at 150 cm height (8-inch long, 3.5 inch diameter, schedule 40 PVC pipe split in half lengthwis - **HJA_MIN_FLAG** — varchar, enum Rows flagged for QA issues, including missing and out of range values - **A** — Accepted value has passed all QC tests applied as represented by the quality level - **M** — Missing value - **Q** — Questionable value, including out of range values ## Entity 4: MS04804 ### Attribute list - **DBCODE** — varchar, enum FSDB Database Code (MS048) - **MS048** — FSDB Database Study Code - **ENTITY** — numeric(1), range 4.0000 4.0000, number Entity number - **SITE** — varchar, enum Site where data collected - **PRIMET** — Primary Meteorological Station - **DATE_TIME** — datetime, freetext Date and time collected - **SOLAR_MEAN** — numeric(1), range 0.0000 1222.0000, watt per m2 Mean incoming solar radiation for interval is measured by a Kipp and Zonen solar radiation pyranometer, model CM3, with a Campbell Scientific data logger at 150 cm height - **SOLAR_MEAN_FLAG** — varchar, enum Rows flagged for QA issues, including missing and out of range values - **A** — Accepted value has passed all QC tests applied as represented by the quality level - **M** — Missing value - **Q** — Questionable value, including out of range values - **SOLAR_MAX** — numeric(1), range 0.0000 1384.0000, watt per m2 Maximum incoming solar radiation for a 5-minute interval is measured by a Kipp and Zonen solar radiation pyranometer, model CM3, with a Campbell Scientific data logger at 150 cm height - **SOLAR_MAX_FLAG** — varchar, enum Rows flagged for QA issues, including missing and out of range values - **A** — Accepted value has passed all QC tests applied as represented by the quality level - **M** — Missing value - **Q** — Questionable value, including out of range values - **REF_SOLAR_MEAN** — numeric(1), range 0.0000 475.0000, watt per m2 Mean reflected solar radiation for interval is measured by a downward-facing Kipp and Zonen solar radiation pyranometer, model CM3, with a Campbell Scientific data logger at 150 cm height - **REF_SOLAR_MEAN_FLAG** — varchar, enum Rows flagged for QA issues, including missing and out of range values - **A** — Accepted value has passed all QC tests applied as represented by the quality level - **M** — Missing value - **Q** — Questionable value, including out of range values - **REF_SOLAR_MAX** — numeric(1), range 0.0000 479.0000, watt per m2 Maximum reflected solar radiation for a 5-minute interval is measured by a downward-facing Kipp and Zonen solar radiation pyranometer, model CM3, with a Campbell Scientific data logger at 150 cm height - **REF_SOLAR_MAX_FLAG** — varchar, enum Rows flagged for QA issues, including missing and out of range values - **A** — Accepted value has passed all QC tests applied as represented by the quality level - **M** — Missing value - **Q** — Questionable value, including out of range values - **WSPD_MEAN** — numeric(1), range 0.0000 18.0000, meters per second Mean wind speed for interval is measured by an RM Young Model 05103 Wind Monitor mounted to the tower at 150 cm with a Campbell Scientific data logger. - **WSPD_MEAN_FLAG** — varchar, enum Rows flagged for QA issues, including missing and out of range values - **A** — Accepted value has passed all QC tests applied as represented by the quality level - **M** — Missing value - **Q** — Questionable value, including out of range values - **B** — Wind speed measurement is below or equal to the instrument detection limit of 1 m per second - **NB** — Wind speed measurement is below or equal to 0.3 m per second and is not considered reliable and is below the instrument detection limit of 1 m per second - **WSPD_MAX** — numeric(1), range 0.0000 18.0000, meters per second Maximum wind speed for a 5-minute interval is measured by an RM Young Model 05103 Wind Monitor mounted to the tower at 150 cm with a Campbell Scientific data logger. - **WSPD_MAX_FLAG** — varchar, enum Rows flagged for QA issues, including missing and out of range values - **A** — Accepted value has passed all QC tests applied as represented by the quality level - **M** — Missing value - **Q** — Questionable value, including out of range values - **B** — Wind speed measurement is below or equal to the instrument detection limit of 1 m per second - **NB** — Wind speed measurement is below or equal to 0.3 m per second and is not considered reliable and is below the instrument detection limit of 1 m per second ## Attribute Definitions **ASPIRATED_MAX** Maximum air temperature measurement for a 5-minute interval sampled by a Campbell Scientific model 107 thermistor housed in a R.M. Young Model 43502-L compact aspirated shield at 150 cm height **ASPIRATED_MAX_FLAG** Rows flagged for QA issues, including missing and out of range values **ASPIRATED_MEAN** Mean air temperature measurement for interval sampled by a Campbell Scientific model 107 thermistor housed in a R.M. Young Model 43502-L compact aspirated shield at 150 cm height **ASPIRATED_MEAN_FLAG** Rows flagged for QA issues, including missing and out of range values **ASPIRATED_MIN** Minimum air temperature measurement for a 5-minute interval sampled by a Campbell Scientific model 107 thermistor housed in a R.M. Young Model 43502-L compact aspirated shield at 150 cm height **ASPIRATED_MIN_FLAG** Rows flagged for QA issues, including missing and out of range values **CRS_MAX** Maximum air temperature measurement for a 5-minute interval sampled by a Campbell Scientific model 107 thermistor housed in a NovaLynx 380-605 large instrument (cotton region) shelter at 150 cm height **CRS_MAX_FLAG** Rows flagged for QA issues, including missing and out of range values **CRS_MEAN** Mean air temperature measurement for interval sampled by a Campbell Scientific model 107 thermistor housed in a NovaLynx 380-605 large instrument (cotton region) shelter at 150 cm height **CRS_MEAN_FLAG** Rows flagged for QA issues, including missing and out of range values **CRS_MIN** Minimum air temperature measurement for a 5-minute interval sampled by a Campbell Scientific model 107 thermistor housed in a NovaLynx 380-605 large instrument (cotton region) shelter at 150 cm height **CRS_MIN_FLAG** Rows flagged for QA issues, including missing and out of range values **DATE_TIME** Date and time collected **DBCODE** FSDB Database Code (MS048) **ENTITY** Entity number **GILL_MAX** Maximum air temperature measurement for a 5-minute interval sampled by a Campbell Scientific model 107 thermistor housed in a R.M. Young 41303-5A 6-plate radiation shield at 150 cm height **GILL_MAX_FLAG** Rows flagged for QA issues, including missing and out of range values **GILL_MEAN** Mean air temperature measurement for interval sampled by a Campbell Scientific model 107 thermistor housed in a R.M. Young 41303-5A 6-plate radiation shield at 150 cm height **GILL_MEAN_FLAG** Rows flagged for QA issues, including missing and out of range values **GILL_MIN** Minimum air temperature measurement for a 5-minute interval sampled by a Campbell Scientific model 107 thermistor housed in a R.M. Young 41303-5A 6-plate radiation shield at 150 cm height **GILL_MIN_FLAG** Rows flagged for QA issues, including missing and out of range values **HJA_MAX** Maximum air temperature measurement for a 5-minute interval sampled by a Campbell Scientific model 107 thermistor housed in a locally designed radiation shield at 150 cm height (8-inch long, 3.5 inch diameter, schedule 40 PVC pipe split in half lengthwis **HJA_MAX_FLAG** Rows flagged for QA issues, including missing and out of range values **HJA_MEAN** Mean air temperature measurement for interval sampled by a Campbell Scientific model 107 thermistor housed in a locally designed radiation shield at 150 cm height (8-inch long, 3.5 inch diameter, schedule 40 PVC pipe split in half lengthwise **HJA_MEAN_FLAG** Rows flagged for QA issues, including missing and out of range values **HJA_MIN** Minimum air temperature measurement for a 5-minute interval sampled by a Campbell Scientific model 107 thermistor housed in a locally designed radiation shield at 150 cm height (8-inch long, 3.5 inch diameter, schedule 40 PVC pipe split in half lengthwis **HJA_MIN_FLAG** Rows flagged for QA issues, including missing and out of range values **REF_SOLAR_MAX** Maximum reflected solar radiation for a 5-minute interval is measured by a downward-facing Kipp and Zonen solar radiation pyranometer, model CM3, with a Campbell Scientific data logger at 150 cm height **REF_SOLAR_MAX_FLAG** Rows flagged for QA issues, including missing and out of range values **REF_SOLAR_MEAN** Mean reflected solar radiation for interval is measured by a downward-facing Kipp and Zonen solar radiation pyranometer, model CM3, with a Campbell Scientific data logger at 150 cm height **REF_SOLAR_MEAN_FLAG** Rows flagged for QA issues, including missing and out of range values **SITE** Site where data collected **SOLAR_MAX** Maximum incoming solar radiation for a 5-minute interval is measured by a Kipp and Zonen solar radiation pyranometer, model CM3, with a Campbell Scientific data logger at 150 cm height **SOLAR_MAX_FLAG** Rows flagged for QA issues, including missing and out of range values **SOLAR_MEAN** Mean incoming solar radiation for interval is measured by a Kipp and Zonen solar radiation pyranometer, model CM3, with a Campbell Scientific data logger at 150 cm height **SOLAR_MEAN_FLAG** Rows flagged for QA issues, including missing and out of range values **WSPD_MAX** Maximum wind speed for a 5-minute interval is measured by an RM Young Model 05103 Wind Monitor mounted to the tower at 150 cm with a Campbell Scientific data logger. **WSPD_MAX_FLAG** Rows flagged for QA issues, including missing and out of range values **WSPD_MEAN** Mean wind speed for interval is measured by an RM Young Model 05103 Wind Monitor mounted to the tower at 150 cm with a Campbell Scientific data logger. **WSPD_MEAN_FLAG** Rows flagged for QA issues, including missing and out of range values ## Enumerated Domains ### DBCODE - **MS048** — FSDB Database Study Code ### SITE - **PRIMET** — Primary Meteorological Station ### ASPIRATED_MEAN_FLAG - **A** — Accepted value has passed all QC tests applied as represented by the quality level - **M** — Missing value - **Q** — Questionable value, including out of range values ### CRS_MEAN_FLAG - **A** — Accepted value has passed all QC tests applied as represented by the quality level - **M** — Missing value - **Q** — Questionable value, including out of range values ### GILL_MEAN_FLAG - **A** — Accepted value has passed all QC tests applied as represented by the quality level - **M** — Missing value - **Q** — Questionable value, including out of range values ### HJA_MEAN_FLAG - **A** — Accepted value has passed all QC tests applied as represented by the quality level - **M** — Missing value - **Q** — Questionable value, including out of range values ### SOLAR_MEAN_FLAG - **A** — Accepted value has passed all QC tests applied as represented by the quality level - **M** — Missing value - **Q** — Questionable value, including out of range values ### REF_SOLAR_MEAN_FLAG - **A** — Accepted value has passed all QC tests applied as represented by the quality level - **M** — Missing value - **Q** — Questionable value, including out of range values ### WSPD_MEAN_FLAG - **A** — Accepted value has passed all QC tests applied as represented by the quality level - **M** — Missing value - **Q** — Questionable value, including out of range values - **B** — Wind speed measurement is below or equal to the instrument detection limit of 1 m per second - **NB** — Wind speed measurement is below or equal to 0.3 m per second and is not considered reliable and is below the instrument detection limit of 1 m per second ### ASPIRATED_MAX_FLAG - **A** — Accepted value has passed all QC tests applied as represented by the quality level - **M** — Missing value - **Q** — Questionable value, including out of range values ### ASPIRATED_MIN_FLAG - **M** — Missing value - **Q** — Questionable value, including out of range values - **A** — Accepted value has passed all QC tests applied as represented by the quality level ### CRS_MAX_FLAG - **A** — Accepted value has passed all QC tests applied as represented by the quality level - **M** — Missing value - **Q** — Questionable value, including out of range values ### CRS_MIN_FLAG - **A** — Accepted value has passed all QC tests applied as represented by the quality level - **M** — Missing value - **Q** — Questionable value, including out of range values ### GILL_MAX_FLAG - **A** — Accepted value has passed all QC tests applied as represented by the quality level - **M** — Missing value - **Q** — Questionable value, including out of range values ### GILL_MIN_FLAG - **A** — Accepted value has passed all QC tests applied as represented by the quality level - **M** — Missing value - **Q** — Questionable value, including out of range values ### HJA_MAX_FLAG - **A** — Accepted value has passed all QC tests applied as represented by the quality level - **M** — Missing value - **Q** — Questionable value, including out of range values ### HJA_MIN_FLAG - **A** — Accepted value has passed all QC tests applied as represented by the quality level - **M** — Missing value - **Q** — Questionable value, including out of range values ### SOLAR_MAX_FLAG - **A** — Accepted value has passed all QC tests applied as represented by the quality level - **M** — Missing value - **Q** — Questionable value, including out of range values ### REF_SOLAR_MAX_FLAG - **A** — Accepted value has passed all QC tests applied as represented by the quality level - **M** — Missing value - **Q** — Questionable value, including out of range values ### WSPD_MAX_FLAG - **A** — Accepted value has passed all QC tests applied as represented by the quality level - **M** — Missing value - **Q** — Questionable value, including out of range values - **B** — Wind speed measurement is below or equal to the instrument detection limit of 1 m per second - **NB** — Wind speed measurement is below or equal to 0.3 m per second and is not considered reliable and is below the instrument detection limit of 1 m per second