The canopy effect in AEM revisited: investigations using laser and radar altimetry
نویسندگان
چکیده
منابع مشابه
Estimating Forest Canopy Height using Photon-counting Laser Altimetry
Reliable global estimates of forest biomass and its dynamics are critically important for understanding the global carbon cycle and its dynamics (e.g., Bellassen et al. 2011). Many studies have been published regarding the estimation of above-ground biomass using airborne or satellite analog lidar systems (e.g., Nelson et al. 1988; Naesset 2002; Drake et al. 2003; Popescu et al. 2003; Lim and T...
متن کاملImproved Accuracy for Interferometric Radar Images Using Polarimetric Radar and Laser Altimetry Data
The ability to measure land surface topography over large areas to assess natural hazard threats posed by seismic and flooding events is a critical, international need. Interferometric synthetic aperture radar (INSAR) has been used to map topography; however, accuracies are limited because observations are not measurements of true surface topography over vegetated areas. Instead, the measuremen...
متن کاملSensitivity Analysis of Brown Model Waveform in Radar Altimetry
In satellite altimetry (radar altimetry), the altimeter emits a pulse, with known power, to the earth surface and receives it back continuously to determine of the sea surface height. The time series of the mean returned power is recorded individually at satellite as the so-called waveform. Analytical model for the waveform is first introduced by Brown, which consists of six parameters: signif...
متن کاملFibrous nanoinclusions in massive rose quartz: HRTEM and AEM investigations
Pink fibrous crystals within massive rose quartz from localities in California, South Dakota, Brazil, Madagascar, and Namibia were examined with high-resolution transmission electron microscopy (HRTEM) and analytical electron microscopy (AEM). This study reveals that the nanofibers in all samples are related to dumortierite. Selected-area electron diffraction (SAED) patterns and HRTEM images in...
متن کاملPhotogrammetry and Laser Altimetry
Laser altimetry has, and is continuing to have a profound impact on photogrammetry. This paper discusses the interrelationship between the two fields, identifies problems, and suggests a common research agenda. Surface reconstruction is an important application in photogrammetry. DTMs, for example, are as much an end result as an intermediate step for orthophoto generation and for object recogn...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Near Surface Geophysics
سال: 2009
ISSN: 1569-4445
DOI: 10.3997/1873-0604.2009054