نتایج جستجو برای: spectroradiometer
تعداد نتایج: 2673 فیلتر نتایج به سال:
In the geosciences, visible–near–short-wave infrared reflectance spectroscopy seems to have capability become a helpful technique for soil classification, mapping, and remote confirmation of characteristics mineral composition. Focus on improving spatial resolution maps in order better deal with localized problems like pollution. A variety physio-chemical properties were measured long-term spik...
Approval: The MISR web site should be consulted to determine the latest released version of this document
Aeolian desertification is poorly understood despite its importance for indicating environment change. Here we exploit Gaofen-1(GF-1) and Moderate Resolution Imaging Spectroradiometer (MODIS) data to develop a quick and efficient method for large scale aeolian desertification dynamic monitoring in northern China. This method, which is based on Normalized Difference Desertification Index (NDDI) ...
In this study Moderate Resolution Imaging Spectroradiometer (MODIS) Aqua retrievals of aerosol optical thickness (AOT) at 555 nm are compared to Sun photometer measurements from Svalbard for a period of 9 years. For the 642 daily coincident measurements that were obtained, MODIS AOT generally varies within the predicted uncertainty of the retrieval over ocean (ΔAOT = ±0.03 ± 0.05 · AOT). The re...
A two band Enhanced Vegetation Index (EVI2) without the blue band reflectance has recently been developed as a proxy for the phenology, quantity, and activity of vegetation. We compared the ability of EVI2 and the more commonly used Normalized Difference Vegetation Index (NDVI) to resolve differences in surface greenness and Leaf Area Index (LAI) among three sites located along a burn severity ...
A new 4π-spectroradiometer was developed for measuring actinic flux especially under cloudy conditions based on a fixed grating imaging spectrograph and a CCDdetector leading to a simultaneous measurement of the spectrum. The new instrument incorporates a novel optical head with a 4π-field of view independent of angle of incidence. Comparisons with the actinic flux spectroradiometer of the Inst...
Global and diffuse UV-visible solar irradiances are routinely measured since 2003 with a spectroradiometer operated by the Laboratoire d’Optique Atmosphérique (LOA) located in Villeneuve d’Ascq, France. The analysis of the direct irradiance derived by cloudless conditions enables retrieving the aerosol optical thickness (AOT) spectrum in the 330–450 nm range. The site hosts also sunphotometers ...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید