The dataset of airborne LiDAR mission in the Dayekou flight zone on Jun. 20, 2008 included peak pulse data (*.LAS), full waveform data (.lgc), CCD photos, DEM, DSM and DOM. The DEM, DSM and DOM data are stored along with the Dataset of airborne LiDAR mission in the Dayekou flight zone on Jun. 23, 2008. The flight routes were as follows: {| ! flight route ! startpoint lat ! startpoint lon ! endpoint lat ! endpoint lon ! altitude (m) ! length (km) ! photos |- | 1 || 38°32′05.38″ || 100°12′24.59″ || 38°29′32.76″ || 100°18′35.69″ || 3650 || 10.1 || 49 |- | 2 || 38°32′11.13″ || 100°12′28.42″ || 38°29′42.06″ || 100°18′30.89″ || 3650 || 9.9 || 46 |- | 3 || 38°32′16.88″ || 100°12′32.24″ || 38°29′47.81″ || 100°18′34.72″ || 3650 || 9.9 || 47 |- | 4 || 38°32′22.63″ || 100°12′36.07″ || 38°29′56.20″ || 100°18′32.15″ || 3650 || 9.7 || 45 |- | 5 || 38°32′28.38″ || 100°12′39.90″ || 38°30′02.62″ || 100°18′34.33″ || 3650 || 9.7 || 47 |- | 6 || 38°32′37.44″ || 100°12′35.66″ || 38°30′10.63″ || 100°18′32.68″ || 3650 || 9.8 || 44 |- | 7 || 38°32′46.50″ || 100°12′31.43″ || 38°30′19.72″ || 100°18′28.37″ || 3650 || 9.8 || 47 |}
NI Wenjian LIU Qingwang Liu Qiang LI Xin MA Mingguo
The dataset of snow properties measured by the Snowfork was obtained in the Binggou watershed foci experimental area from Mar. 10 to 30, 2008, in cooperation with simultaneous airborne, satellite-borne and ground-based remote sensing experiments and other control experiments. Observation items included (1) physical quantities by direct observations: resonant frequency, the rate of attenuation and 3db bandwidth; (2) physical quantities by indirect observations: snow density, snow complex permittivity (the real part and the imaginary part), snow volumetric moisture and snow gravimetric moisture. 13 files are archived, and the user guide of the sampling plot and observation background is included too.
HAO Xiaohua
The dataset of airborne imaging spectrometer (OMIS-II) mission was obtained in the Zhangye-Yingke-Huazhaizi flight zone on Jun. 16, 2008. Data after radiometric correction and calibration and geometric approximate correction were released. The flying time of each route was as follows: {| ! id ! flight ! file ! starttime ! lat ! long ! alt ! image linage ! endtime ! lat ! long ! alt |- | 1 || 3-1 || 2008-06-16_14-26-53_DATA.BSQ || 14:44:01 || 38.992 || 100.446 || 3250.7 || 6698 || 14:51:28 || 38.744 || 100.286 || 3237.7 |- | 2 || 3-2 || 2008-06-16_14-52-37_DATA.BSQ || 14:55:47 || 38.731 || 100.284 || 3214.9 || 7202 || 15:03:47 || 38.981 || 100.445 || 3237.6 |- | 3 || 3-3 || 2008-06-16_15-04-57_DATA.BSQ || 15:09:29 || 38.989 || 100.457 || 3230.2 || 6740 || 15:16:58 || 38.739 || 100.297 || 3236.0 |- | 4 || 3-4 || 2008-06-16_15-18-07_DATA.BSQ || 15:21:19 || 38.728 || 100.296 || 3200.6 || 7256 || 15:29:23 || 38.979 || 100.457 || 3170.8 |- | 5 || 3-5 || 2008-06-16_15-30-32_DATA.BSQ || 15:35:06 || 38.983 || 100.466 || 3221.9 || 6627 || 15:42:28 || 38.736 || 100.307 || 3227.9 |- | 6 || 3-6 || 2008-06-16_15-43-37_DATA.BSQ || 15:47:39 || 38.726 || 100.308 || 3249.2 || 7013 || 15:55:27 || 38.975 || 100.467 || 3219.1 |- | 7 || 3-7 || 2008-06-16_15-56-36_DATA.BSQ || 16:00:46 || 38.981 || 100.476 || -1.0 || 6639 || 16:08:09 || 38.732 || 100.317 || 3276.8 |- | 8 || 3-8 || 2008-06-16_16-09-18_DATA.BSQ || 16:13:15 || 38.723 || 100.317 || 3212.7 || 7106 || 16:21:09 || 38.973 || 100.479 || 3216.1 |- | 9 || 3-9 || 2008-06-16_16-22-18_DATA.BSQ || 16:26:28 || 38.981 || 100.490 || 3218.6 || 6850 || 16:34:05 || 38.725 || 100.325 || 3235.9 |- | 10 || 3-10 || 2008-06-16_16-35-14_DATA.BSQ || 16:39:23 || 38.716 || 100.326 || 3261.3 || 7056 || 16:47:14 || 38.967 || 100.488 || 3208.4 |- | 11 || 3-11 || 2008-06-16_16-48-23_DATA.BSQ || 16:52:44 || 38.976 || 100.501 || 3204.8 || 6902 || 17:00:24 || 38.725 || 100.338 || 3230.1 |- | 12 || 3-12 || 2008-06-16_17-01-33_DATA.BSQ || 17:05:19 || 38.710 || 100.336 || 3253.8 || 7033 || 17:13:08 || 38.965 || 100.500 || 3225.6 |- | 13 || 3-13 || 2008-06-16_17-14-17_DATA.BSQ || 17:19:01 || 38.973 || 100.511 || 3224.8 || 6831 || 17:26:36 || 38.722 || 100.349 || 3230.1 |- | 14 || 3-14 || 2008-06-16_17-27-46_DATA.BSQ || 17:32:06 || 38.706 || 100.346 || 3233.7 || 3235 || 17:35:44 || 38.830 || 100.426 || 3235.1 |- | 15 || 3-15 || 2008-06-16_17-36-54_DATA.BSQ || 17:35:51 || 38.8334 || 100.428 || 3235.8 || 3625 || 17:39:52 || 38.963 || 100.511 || 3250.6 |}
Liu Liangyun LI Xin MA Mingguo
The dataset of ground truth measurement synchronizing with the airborne microwave radiometers (L&K bands) mission was obtained in L2, L4 and L5 of the A'rou foci experimental area on Mar. 19, 2008. The samples were collected every 100 m along the strip from south to north. In L2, the soil temperature, soil volumetric moisture, the loss tangent, soil conductivity, and the real part and the imaginary part of soil complex permittivity were acquired by the POGO soil sensor, the mean soil temperature from 0-5cm by the probe thermometer, and soil gravimetric moisture, volumetric moisture, and soil bulk density after drying by the cutting ring (100cm^3). In L4, the soil temperature, soil volumetric moisture, the loss tangent, soil conductivity, and the real part and the imaginary part of soil complex permittivity were acquired by the POGO soil sensor, the mean soil temperature from 0-5cm by the probe thermometer, the surface radiative temperature measured three times by the hand-held infrared thermometer, and soil gravimetric moisture, volumetric moisture, and soil bulk density after drying by the cutting ring (100cm^3). In L5, soil volumetric moisture was acquired by ML2X, the mean soil temperature from 0-5cm by the probe thermometer, and soil gravimetric moisture, volumetric moisture, and soil bulk density after drying by the cutting ring (100cm^3). Surface roughness was detailed in the "WATER: Surface roughness dataset in the A'rou foci experimental area". Besides, GPR (Ground Penetration Radar) observations were also carried out in L6 and the handheld thermal imager observations in L4. Those provide reliable ground data for retrieval and validation of soil moisture and freeze/thaw status from active remote sensing approaches.
JIN Rui ZHOU Hongmin LI Hua
The dataset of ground truth measurements synchronizing with the airborne microwave radiometers (L&K bands) mission was obtained along the sample lines 1, 2, 3, 4, 5 and 6 of the Linze grassland foci experimental area on Jul. 8, 2008. 25 points at intervals of 100m were selected along each line. Simultaneous with the satellite overpass, numerous ground data were collected, soil gravimetric moisture, volumetric moisture, and soil bulk density by the cutting ring, the mean soil temperature from 0-5cm by the probe thermometer, the canopy and the land surface temperature by the hand-held infrared thermometer. See WATER: Dataset of setting of the sampling plots and stripes in the foci experimental area of Linze station for more information.
GE Chunmei Wang Yang WANG Xufeng
The dataset of ground truth measurement synchronizing with the airborne microwave radiometers (L&K bands) mission was obtained in the Biandukou foci experimental area on Jul. 4, 2008. Observation items included: (1) the soil temperature by the handheld infrared thermometer from L1 to L8 (1km from one another) in Biandukou and soil moisture by ML2X; nine samples were collected every 200 m along each line (1.6km). (2) 5 quadrates (50cm×50cm) investigations including GPS, the vegetation cover types and the height, the actual numbering, the valve bag numbering, wet weight+the refuse bag (g), dry weight+the envelope (g), the envelope (g) and the photo numbering. The data were archived as Excel files.
MA Mingguo RAN Youhua
The dataset of soil moisture profile (0cm, 20cm, 40cm and 1m) observations was obtained by TDR (with the probe 12cm and 20cm) in the Yingke oasis and Huazhaizi desert steppe foci experimental areas. Observation items included: (1) Soil moisture synchronizing with TM in Yingke oasis No. 1, 4 and 5 maize plots on May 20, 2008. (2) Soil moisture synchronizing with ASTER and MODIS in Yingke oasis foci experimental areas on May 28, 2008. (3) Soil moisture synchronizing with WiDAS (Wide-angle Infrared Dual-mode line/area Array Scanner) in Yingke oasis foci experimental areas on May 30, 2008. (4) Soil moisture synchronizing with WiDAS (Wide-angle Infrared Dual-mode line/area Array Scanner) in A'rou grassland on May 31, 2008. (5) Soil moisture synchronizing with OMIS-II in Yingke oasis foci experimental areas on Jun. 4, 2008. (6) Soil moisture synchronizing with OMIS-II in Yingke oasis maize field on Jun. 16, 2008. (7) Soil moisture by TDR and the cutting ring, synchronizing with ASAR in Yingke oasis maize field and wheat field on Jun. 19, 2008. (8) Soil moisture synchronizing with WiDAS (Wide-angle Infrared Dual-mode line/area Array Scanner) in Yingke oasis foci experimental areas on Jun. 29, 2008. (9) Soil moisture synchronizing with WiDAS (Wide-angle Infrared Dual-mode line/area Array Scanner) and TM in Yingke oasis foci experimental areas on Jul. 7, 2008. (10) Soil moisture synchronizing with WiDAS (Wide-angle Infrared Dual-mode line/area Array Scanner) in Yingke oasis foci experimental areas on Jul. 11, 2008.
Gai Yingchun Zhang Yang FENG Lei
The dataset of ground truth measurement synchronizing with Envisat ASAR was obtained in No. 1, 2 and 3 quadrates of the A'rou foci experimental area on Jul. 5 and Jul. 6, 2008. The Envisat ASAR data were in AP mode and VV/VH polarization combinations, and the overpass time was approximately at 11:14 BJT. The quadrates were divided into 4×4 subsites, with each one spanning a 30×30 m2 plot. Observation items included: (1) the quadrate investigation in No. 2 and 3 quadrates: GPS by GARMIN GPS 76, plant species by manual cognition, the plant number by manual work, the height by the measuring tape repeated 4-5 times, phenology by manual work, the coverage by manual work (compartmentalizing 0.5m×0.5m into 100 to see the percentage the stellera takes) and the chlorophyll content by SPAD 502. (2) spectrum of stellera and pasture by ASD FieldSpec (350～2 500 nm), with 20% reference board. The preprocessed canopy spectrum was archived. (3) BRDF by ASD FieldSpec (350～2 500 nm), with 20% reference board. The processed reflectance and transmittivity were archived as .txt files. (4) photosynthesis of stellera and pasture by LI-6400. The data were archived in Excel format. (5) soil moisture by WET soil moisture tachometer. Acquisition time, soil moisture (%vol), Ecp (ms/m), Tmp Eb and Ecb (ms/m) of 25 corner points were archived. (6) the soil temperature by the handheld infrared thermometer. Acquisition time, the soil temperature measured three times and the land cover types were archived. The data included the canopy reflectance on Jul. 5 and 6, photosynthesis on Jul. 5 and 6, BRDF on Jul. 5, photos on Jul. 5, the infrared land surface temperature and soil moisture by WET on Jul. 5, biomass on Jul. 5 and the surface temperature along No. 3 flight on Jul. 6.
DING Songshuang MA Mingguo
The dataset of ground-based RPG-8CH-DP microwave radiometer and ground truth observations for soil freeze/thaw cycle was obtained in the A'rou foci experimental area from Mar. 10 to 11, 2008. The radiometer was set 4.5m height above a smooth land, which was covered with snow less than 10cm deep. The field of view was roughly determined and not as ideal. Frozen soil was observed clockwise 240° and snow clockwise 270° with the truck head as the 0 degree azimuth; the elevation angle was set at -40° for the former, and from -20° to -70° for the latter. Observation items included surface soil moisture (microwave drying to get the gravimetric moisture), the soil temperature by the thermal resistor and vegetation. The shallow layer of the site was covered with withered grass with exuberant roots underground due to rich organic. The soil temperature changes were reflected by the thermal resistor and recorded by the DataTaker. The brightness temperature was archived as .BRT and .txt files (the ASCII format). Data in two formats were the same. Each row in .txt format was listed by year, month, date, hour, minute, second, 6.925GHz (h), 6.925GHz (v), 10.65GHz (h), 10.65GHz (v) , 18.7GHz (h), 18.7GHz (v), 36.5GHz (h), 36.5GHz (v), the elevation angle, and the azimuth angle. Values for 6.925GHz and 10.65GHz were zero due to disfunction.
The dataset of ground truth measurement synchronizing with the airborne microwave radiometers (L&K bands) was obtained in the Biandukou foci experimental area from 11:20 to 12:30BJT on Mar. 19, 2008. Observation items included: (1) the frost depth by the chopstick and the ruler. The soil was considered frozen when it was hard and with ice crystal. The data can be opened by Microsoft Office Word. (2) the surface radiative temperature by the handheld infrared thermometer and the physical temperature by the thermocouple. The data can be opened by Microsoft Office Word. (3) the soil moisture (soil samples from 0-1cm, 1-3cm and 3-5cm) by the microwave drying method. The data can be opened by Microsoft Office Word. (4) photos of each sampling point in .jpg for further reference. Six data files were included, the ground-based K-band microwave radiometer, the ground-based L-band microwave radiometer, the frost depth, soil moisture, the surface temperature and the surface conditions.
Fang Qian ZHANG Zhiyu ZHAO Shaojie Zhao Tianjie Zhou Ji CHE Tao ZHANG Zhiyu
The dateset of sun photometer observations was obtained in the Biandukou foci experimental area from Mar. 7 to 17, 2008, simultaneous with MODIS and TM. Those provide reliable data for atmosphere correction of the same period in this area. Atmospheric parameters were measured by CE318. The optical depth in 1020nm, 936nm, 870nm, 670nm and 440nm were all acquired. Column water vapor can also be retrieved according to data in 936 nm. The dataset archived in txt files includes processed data on Mar. 7, 14 and 17 respectively.
The dataset of ground truth measurements synchronizing with PROBA CHRIS was obtained in 21 quadrates of the Biandukou foci experimental area on Jul. 18, 2008. Observation items included: (1) GPS by GARMIN GPS 76; (2) species by manual cognition; (3) the plant number by manual work, (4) the height by the measuring tape repeated 4-5 times, (5) the chlorophyll content by SPAD 502; (6) the coverage by manual work; (7) photo taking by Nikon D80 with a lens of Sigma 8mm F3.5 EX DG CIRCULAR FISHEYE, shooting straight downwards at the height of 1.5m; original photos were in JPG format and the processed data in Excel format. (8) the biomass (samples over 0.5m×0.5m) by wet weight and dry weight; as Excel files.
MA Mingguo RAN Youhua
The dateset of the ground-based RPG-8CH-DP microwave radiometer observations was obtained in the Biandukou foci experimental area from Mar. 14 to 17, 2008. Observation items included the brightness temperature by the ground-based microwave radiometer (18.7GHz and 36.5GHz), the soil temperature by the thermal resistor, the gravimetric soil moisture by the microwave drying method, and the surface roughness by the grid board. The wheat stubble land (38°15'44.13"N, 100°55'35.34"E) was chosen for continuous observations from 11:00 to 24:00 on Mar. 14, with the incidence 20°-70° and the step length 5°. The rape stubble land (38°15'23.17"N, 100°58'37.84"E) was chosen for continuous observations from 10:00 to 21:30 on Mar. 16, with the incidence 20°-70° and the step length 5°. The deep plowed land (38°18'8.28"N, 101° 3'27.22"E) was chosen for short time observations from 17:26 to 19:20 on Mar. 17, with the azimuth angle 240°-300° and the step length 10°, the incidence 40°-70° and the step length 5°. The brightness temperature was archived as .BRT and .txt files (the ASCII format). Each row in .txt was listed by year, month, date, hour, minute, second, 6.925GHz (h), 6.925GHz (v), 10.65GHz (h), 10.65GHz (v) , 18.7GHz (h), 18.7GHz (v), 36.5GHz (h), 36.5GHz (v), the elevation angle, and the azimuth angle. Values for 6.925GHz and 10.65GHz were zero due to malfunction. The roughness data were obtained by the grid board and the camera and the RMS height (cm) and correlation length (cm) were also calculated and archived, which could be opened by Notepad or Microsoft Office Word. Those provide reliable reference for the roughness of the same land cover type. The gravimetric soil moisture (soil samples from 0-1cm, 1-3cm and 3-5cm) was measured by the microwave drying method. The file can be opened by Microsoft Office Word. The shallow layer soil moisture was measured by hydra prob from 12:00 to 17:00 on 14 and by the Hydra probe (straight downward for 0-5cm) and HH2 (level into the soil surface) on 16. The surface temperature was measured by the thermal resistor. The file can be opened by Microsoft Office Word. Four data files were included, the brightness temperature, the surface temperature, the soil moisture and the surface roughness.
ZHANG Zhiyu ZHAO Shaojie Zhao Tianjie ZHANG Zhiyu
The dataset of ground-based microwave scatterometer (C-5 and LS-C-5; S-3; LS-S-3) and ground truth observations was obtained in the Linze grassland foci experimental area. Besides, TDR-200 was also used. Observation items included: (1) soil moisture of the grassland on Jul. 9, 2008. HH, HV, VV and VH polarization combinations were applied. (2) soil moisture of the maize field on Jul. 10, 2008. VV, HH, VH and HV polarization combinations were applied. (3) humidity of the grassland at around 11:30am on Jul. 11, 2008. VH, HH, VV and HV polarization combinations were applied.
Dataset of airborne imaging spectrometer (OMIS-II) mission was obtained in the Zhangye-Yingke-Huazhaizi flight zone on Jun. 4, 2008. Data after radiometric correction and calibration and geometric approximate correction were released. The flying time of each route was as follows: {| ! id ! flight ! file ! starttime ! lat ! long ! alt ! image linage ! endtime ! lat ! long ! alt |- | 1 || 3-15 || 2008-06-04_10-09-09_DATA.BSQ || 10:09:16 || 38.964 || 100.512 || 3315.0 || 6764 || 10:16:47 || 38.713 || 100.351 || 3351.0 |- | 2 || 3-14 || 2008-06-04_10-20-29_DATA.BSQ || 10:21:20 || 38.713 || 100.344 || 3319.1 || 6865 || 10:28:57 || 38.961 || 100.504 || 3311.7 |- | 3 || 3-13 || 2008-06-04_10-33-05_DATA.BSQ || 10:34:27 || 38.974 || 100.505 || 3340.1 || 6934 || 10:42:09 || 38.718 || 100.341 || 3370.7 |- | 4 || 3-12 || 2008-06-04_10-45-51_DATA.BSQ || 10:47:00 || 38.711 || 100.30 || 3331.2 || 6999 || 10:54:47 || 38.966 || 100.494 || 3315.8 |- | 5 || 3-11 || 2008-06-04_10-58-29_DATA.BSQ || 11:00:26 || 38.978 || 100.495 || 3332.3 || 6914 || 11:08:07 || 38.723 || 100.331 || 3356.2 |- | 6 || 3-10 || 2008-06-04_11-11-48_DATA.BSQ || 11:12:43 || 38.716 || 100.320 || 3326.8 || 6969 || 11:20:28 || 38.970 || 100.484 || 3318.1 |- | 7 || 3-9 || 2008-06-04_11-24-09_DATA.BSQ || 11:25:54 || 38.978 || 100.483 || 3337.7 || 6755 || 11:33:25 || 38.727 || 100.321 || 3339.4 |- | 8 || 3-8 || 2008-06-04_11-37-06_DATA.BSQ || 11:38:31 || 38.721 || 100.310 || 3327.3 || 6930 || 11:46:13 || 38.976 || 100.474 || 3326.6 |- | 9 || 3-7 || 2008-06-04_11-49-54_DATA.BSQ || 11:51:37 || 38.984 || 100.473 || 3333.0 || 6730 || 11:59:05 || 38.732 || 100.311 || 3351.4 |- | 10 || 3-6 || 2008-06-04_12-02-47_DATA.BSQ || 12:03:48 || 38.725 || 100.300 || -1.0 || 6790 || 12:11:21 || 38.978 || 100.462 || 3325.8 |- | 11 || 3-5 || 2008-06-04_12-15-02_DATA.BSQ || 12:16:41 || 38.991 || 100.465 || 3357.9 || 6893 || 12:24:21 || 38.734 || 100.300 || 3386.0 |- | 12 || 3-4 || 2008-06-04_12-28-02_DATA.BSQ || 12:28:52 || 38.729 || 100.290 || 3331.3 || 6820 || 12:36:27 || 38.983 || 100.453 || 3327.5 |- | 13 || 3-3 || 2008-06-04_12-40-09_DATA.BSQ || 12:41:59 || 38.994 || 100.454 || 3347.3 || 6934 || 12:49:41 || 38.741 || 100.291 || 3360.4 |- | 14 || 3-2 || 2008-06-04_12-53-23_DATA.BSQ || 12:54:31 || 38.734 || 100.280 || 3328.1 || 7110 || 13:02:25 || 38.990 || 100.445 || 3338.6 |- | 15 || 3-1 || 2008-06-04_13-06-07_DATA.BSQ || 13:07:35 || 39.000 || 100.444 || 3325.9 || 6979 || 13:15:20 || 38.746 || 100.281 || 3334.4 |}
Liu Liangyun LI Xin MA Mingguo
The dataset of ground truth measurement synchronizing with Envisat ASAR and MODIS was obtained in the arid region hydrological experimental area on May 24, 2008. The Envisat ASAR data were in AP mode and VV/VH polarization combinations, and the overpass time was approximately at 11:34 BJT. Observation items included: (1) The radiative temperature of Reaumuria soongorica and the bare soil in Huazhaizi desert No. 2 plot (HZZHMYD2)was collected using ThermaCAM SC2000 (1.2m above the ground, FOV = 24°×18°), along the diagonal (NW-SE). The data included raw data (read by ThermaCAM Researcher 2001), recorded data and the blackbody calibrated data (archived as Excel files). (2) The radiative temperature by the automatic thermometer (FOV: 10°; emissivity: 0.95), were measured at nadir with time intervals of one second. Raw data, blackbody calibrated data and processed data were all archived as Excel files. (3) The radiative temperature in Huazhaizi desert No. 2 plot by the handheld infrared thermometer (which belongs to BNU) along the diagonal (NW-SE). Raw data (.doc), blackbody calibrated data and processed data (in Excel format) were all archived. (4) Soil moisture (0-40cm) by the cutting ring and the soil temperature by the thermocouple thermometer in Yingke oasis and Huazhaizi foci experimental area. Besides, (a) roughness of No. 1 and 2 Huazhizi desert plots was also measured by self-made instruments . Sample points were selected every 30m along the diagonal of each plot. (b) soil profile moisture (0-100cm) and the temperature in the maize field of Yingke oasis. (c) soil profile moisture (0-100cm) and the temperature in one orchard of Yingke Oasis. Data were all archived as Excel files. (5) the photosynthetic rate of alfalfa and barley at Linze grass station by LI-6400. Raw data were archived in the user-defined format (by notepat.exe) and processed data were as Excel files. (6) ground object reflectance spectra of new-born rape and the bare land in Biandukou foci experimental area by ASD FieldSpec (350～2500 nm) from Institute of Remote Sensing Applications (CAS). Raw data were binary files direct from ASD (by ViewSpecPro), and pre-processed data on reflectance were in Excel format. (7) LAI by the measuring tape and the ruler in the alfalfa field of Linze grass station. The maximum length and width of alfalfa leaves and barley were measured. Data were archived as Excel files. (8) surface roughness in Huazhaizi desert No. 2 plot with the self-made roughness board (Cold and Arid Regions Environmental and Engineering Research Institute, CAS), the digital camera and the compass. Sample points were selected at equal intervals along the diagonals and marked in the photos.
Gai Yingchun WANG Jianhua GUANG Jie XIN Xiaozhou ZHANG Yang
The dataset of BRDF observations was obtained in the Linze station foci experimental area from May 25 to Jul. 11, 2008. Spectrum of the maize field quadrate and desert scrub quadrate in Wulidun farmland (May 25, 28, 30, Jun. 29 and Jul. 11), the desert transit zone strip (May 28 and 30) and Linze station quadrates (Jun. 25, 30 and Jul. 9) was measured by ASD Spectroradiometer (350～2 500 nm) from BNU, the reference board (40% before Jun. 15 and 20% hereafter), two observation platforms of BNU make and one of Institute of Remote Sensing Applications make. Raw spectral data were archived as binary files, which were recorded daily in detail, and pre-processed data on reflectance and transmittivity were archived as text files (.txt). See the metadata record “WATER: Dataset of setting of the sampling plots and stripes in the Linze station foci experimental area” for more information of the quadrate locations.
LI Jing QU Yonghua CHEN Shaohui LI Shihua
The dataset of ground-based microwave scatterometer and snow parameter observations was obtained in the Binggou watershed experimental area on Mar. 16, 2008. Observation items included: (1) Snow backscattering coefficient by the scatterometer (2) Snow parameters as the snow surface temperature by the probe thermometer, snow grain size by the handheld microscope, snow density by the snow shovel, the snow surface temperature and the snow-soil interface temperature by the handheld infrared thermometer in BG-I. (3) The snow spectrum by the portable ASD (Xinjiang Meteorological Administration) at the Dadongshu mountain pass; the major and minor axis and shape of the snow layer grain through the snow sieve. (4) Snow albedo by the total radiometer from 10:29 to 15:00 (5) Snow density, snow complex permittivity, snow volumetric moisture and snow gravimetric moisture by the Snowfork at the Dadongshu mountain pass Two subfolders including raw data and preprocessed data were archived.
WANG Xufeng MA Mingguo
The dataset of ground truth measurement synchronizing with Envisat ASAR was obtained in No. 2 and 3 quadrates of the A'rou foci experimental area on Mar. 14, 2008. The Envisat ASAR data were in AP mode and VV/VH polarization combinations, and the overpass time was approximately at 23:21 BJT. The quadrates were divided into 4×4 subsites, with each one spanning a 30×30 m2 plot. Only the corner points of each subsite were chosen for observations. Those provide reliable ground data for retrieval and verification of soil moisture from active remote sensing approaches. In No. 2 quadrate, simultaneous with the satellite overpass, numerous ground data were collected, the soil temperature, soil volumetric moisture, the loss tangent, soil conductivity, and the real part and the imaginary part of soil complex permittivity by the POGO soil sensor, the mean soil temperature from 0-5cm by the probe thermometer, the surface radiative temperature measured three times by the hand-held infrared thermometer, soil gravimetric moisture, volumetric moisture, and soil bulk density after drying by the cutting ring (100cm^3). In No. 3 quadrate, simultaneous with the satellite overpass, numerous ground data were collected, the soil temperature, soil volumetric moisture, the loss tangent, soil conductivity, and the real part and the imaginary part of soil complex permittivity by the POGO soil sensor, soil volumetric moisture by ML2X, the mean soil temperature from 0-5cm by the probe thermometer, the surface radiative temperature measured three times by the hand-held infrared thermometer, soil gravimetric moisture, volumetric moisture, and soil bulk density after drying by the cutting ring (100cm^3). Surface roughness was detailed in the "WATER: Surface roughness dataset in the A'rou foci experimental area".
JIN Rui LI Xin MA Mingguo WANG Xufeng
The dataset of object spectral was obtained in the Linze station foci experimental area from May 25 to Jul. 11, 2008. The measurement instrument is ASD Spectroradiometer (350～2 500 nm) from BNU and the reference board (40% before Jun. 15 and 20% hereafter). The selected typical objects included maize field, soil, soil with known moisture and desert scrub. The measured quadrates included Wulidun farmland quadrates (May 28 and 30, Jun. 16 and 29 and Jul. 11), the desert transit zone strips (May 28 and 30 and Jun. 16) and Linze station quadrates (May 23 and Jul. 9) Besides, soil samples were collected inside Linze station quadrates on Jun. 24 and 30, 2008. Raw spectral data were archived as binary files, which were recorded daily in detail, and pre-processed data on reflectance and transmittivity were archived as text files (.txt). See the metadata record “WATER: Dataset of setting of the sampling plots and stripes in the Linze station foci experimental area” for more information of the quadrate locations.
LI Jing QU Yonghua CHEN Shaohui LI Shihua
