On May 28, 2008, the aster satellite ground synchronous observation test was carried out in the encrypted observation area of Linze station. The observation contents include soil moisture, surface radiation temperature, surface feature spectrum and BRDF. ASTER data not obtained.
1. Soil moisture observation; Observation target: 0-5cm topsoil. Observation instrument: ring knife (volume 50cm ^ 3), ml2x soil moisture rapid tester. Observation quadrats and observation times: Desert East-West sample belt (including 40 sub quadrats, each sub quadrat corner point is sampled once), desert north-south sample belt (including 9 sub quadrats, each sub quadrat corner point is sampled once), wulidun farmland sample is sampled at the midpoint of 9 small quadrats, sample No. 5 in the center is encrypted, and 4 corner points are also sampled (each measuring point is sampled once with a ring knife), Ml2x soil moisture meter (1 observation). The pretreatment data is soil volume water content. Data storage: Excel.
2. Surface radiation temperature observation; Observation instrument: hand held infrared thermometer (cold and drought Institute 5#, cold and drought Institute 6#), and the instruments have been calibrated (please refer to the calibration data of hand-held infrared thermometer. XLS). Observation quadrats and sampling times: Desert East-West sample zone (including 40 sub quadrats, 14-30 observations in each sub quadrat), desert north-south sample zone (including 9 sub quadrats, 12-30 observations in each sub quadrat). Preprocessing data according to the thermal infrared calibration data (the standard source is blackbody), the measured temperature of each instrument is linearly fitted with the corresponding blackbody temperature to obtain the fitting equation, and then the above fitted equation is used to calibrate the observed original observation data. Data storage: Excel.
3. Ground feature spectrum; Observation instrument: ASD spectrometer of Beijing Normal University, 350-2500 nm, 40% reference plate. Observation site: wulidun farmland quadrat and desert transition zone. Observation target: spectrum of surface features such as corn field, soil and soil with known water content. Data storage: data includes original data and preprocessed data. The original data is the binary file directly generated by the spectrometer, which can be opened with viewspecpro software. See the daily observation records in the data file for detailed observation records; The reflectance data obtained by preprocessing is in text format.
4．BRDF； Observation instrument: ASD spectrometer of Beijing Normal University, 350-2500 nm; 40% reference plate; The multi angle observation frame includes an old multi angle observation frame of Beijing Normal University, a new multi angle observation frame made by Beijing Normal University in 2008 and a new multi angle observation frame made by Remote Sensing Institute. Observation site: wulidun farmland quadrat and desert transition zone. Sample type: maize, shrub in desert transition zone. Storage mode: this data set includes original data and processed data. The original data is composed of binary files and record tables, and the binary files can be read by viewspecpro software; The processed reflectivity and transmittance are in text format.
5. Manually measure Lai; Observation site: wulidun farmland quadrat and Linze station quadrat. Observation items: Lai, plant height and spacing. Lai measurement scheme: (1) use a ruler and a triangular plate to sample, measure and record the leaf length and width, the total number of crops in the quadrat and the quadrat size, calculate the average leaf area of the crop, multiply by the total number of plants in the quadrat, obtain the estimated total leaf area of the crop, and divide it by the quadrat area to obtain the average Lai measurement value of the observed quadrat every day（ 2) Lai was measured using li-3100. Plant height measurement scheme: measure the height of male and female parents of seed Maize in the quadrat with a tape measure. Spacing measurement scheme: measure the row spacing, plant spacing and ridge spacing of male and female parents of seed maize with tape. Storage method: this data is processed data, and the file format is excel.
See the metadata "Heihe integrated remote sensing joint test: layout of quadrat transects in the densified observation area of Linze station" for the distribution and number of quadrat transects, and see the quadrat transect coordinates.xls of the densified observation station of Linze station for the quadrat location
On May 28, 2008, the aster satellite ground synchronous observation test was carried out in the encrypted observation area of Linze station. The observation contents include soil moisture, surface radiation temperature, surface feature spectrum and BRDF. ASTER data not obtained
1. Soil moisture observation; Observation target: 0-5cm topsoil. Observation instrument: ring knife (volume 50cm ^ 3), ml2x soil moisture rapid tester. Observation quadrats and observation times: Desert East-West sample belt (including 40 sub quadrats, each sub quadrat corner point is sampled once), desert north-south sample belt (including 9 sub quadrats, each sub quadrat corner point is sampled once), wulidun farmland sample is sampled at the midpoint of 9 small quadrats, sample No. 5 in the center is encrypted, and 4 corner points are also sampled (each measuring point is sampled once with a ring knife), Ml2x soil moisture meter (1 observation). The pretreatment data is soil volume water content. Data storage: Excel.
2. Surface radiation temperature observation; Observation instrument: hand held infrared thermometer (cold and drought Institute 5#, cold and drought Institute 6#), and the instruments have been calibrated (please refer to the calibration data of hand-held infrared thermometer. XLS). Observation quadrats and sampling times: Desert East-West sample zone (including 40 sub quadrats, 14-30 observations in each sub quadrat), desert north-south sample zone (including 9 sub quadrats, 12-30 observations in each sub quadrat). Preprocessing data according to the thermal infrared calibration data (the standard source is blackbody), the measured temperature of each instrument is linearly fitted with the corresponding blackbody temperature to obtain the fitting equation, and then the above fitted equation is used to calibrate the observed original observation data. Data storage: Excel.
3. Ground feature spectrum; Observation instrument: ASD spectrometer of Beijing Normal University, 350-2500 nm, 40% reference plate. Observation site: wulidun farmland quadrat and desert transition zone. Observation target: spectrum of surface features such as corn field, soil and soil with known water content. Data storage: data includes original data and preprocessed data. The original data is the binary file directly generated by the spectrometer, which can be opened with viewspecpro software. See the daily observation records in the data file for detailed observation records; The reflectance data obtained by preprocessing is in text format.
4．BRDF； Observation instrument: ASD spectrometer of Beijing Normal University, 350-2500 nm; 40% reference plate; The multi angle observation frame includes an old multi angle observation frame of Beijing Normal University, a new multi angle observation frame made by Beijing Normal University in 2008 and a new multi angle observation frame made by Remote Sensing Institute. Observation site: wulidun farmland quadrat and desert transition zone. Sample type: maize, shrub in desert transition zone. Storage mode: this data set includes original data and processed data. The original data is composed of binary files and record tables, and the binary files can be read by viewspecpro software; The processed reflectivity and transmittance are in text format.
5. Manually measure Lai; Observation site: wulidun farmland quadrat and Linze station quadrat. Observation items: Lai, plant height and spacing. Lai measurement scheme: (1) use a ruler and a triangular plate to sample, measure and record the leaf length and width, the total number of crops in the quadrat and the quadrat size, calculate the average leaf area of the crop, multiply by the total number of plants in the quadrat, obtain the estimated total leaf area of the crop, and divide it by the quadrat area to obtain the average Lai measurement value of the observed quadrat every day（ 2) Lai was measured using li-3100. Plant height measurement scheme: measure the height of male and female parents of seed Maize in the quadrat with a tape measure. Spacing measurement scheme: measure the row spacing, plant spacing and ridge spacing of male and female parents of seed maize with tape. Storage method: this data is processed data, and the file format is excel.
Good data quality
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CSTR:11738.11.ncdc.nieer.2020.1547
10.12072/ncdc.NIEER.db1861.2022