Absolute spectroradiometric measurements

Errors in Spectroradiometric Measurements Using Multi-Channel Detectors

Angular Spectroradiometric Field Measurements for Precision Farming Purposes

Precision farming requires information about the present status of the vegetation canopy. Remote sensing products can provide such information. The general investigation approach is based on the evaluation of remotely sensed data by the inversion of physical backscatter models and coupled growth models. The presented paper describes the measurement strategy, developed for the establishment of a...

Extraction and Validation of Biophysical Variables of Grassland Communities Using Fielp Spectroradiometric Measurements

Ground spectroradiometric measurements using a GER3700 spectroradiometer on grassland communities are used to assess the potential of unmixing methods, derivative spectroscopy, and spectral feature fitting. The reference testsite used for this work is a well controlled and maintained area by a multinational biodiversity project, namely ’BIODEPTH’. Results of the application of the different met...

Spectroradiometric Measurements of Tree Species in the Caspian Forests of Iran

Forest type maps play a significant role in sustainable forest management. For many years aerial photos and satellite data were a primary data source supporting forest type mapping. Recent developments in remote sensing provide opportunities to further enhance forest type maps by introducing variations of spectral, biochemical and biophysical properties at various scales. A structural sampling ...

Absolute density measurements in the middle atmosphere

In the last ten years a total of 25 sounding rockets employing ionization gauges have been launched at high latitudes (∼ 70 N) to measure total atmospheric density and its small scale fluctuations in an altitude range between 70 and 110 km. While the determination of small scale fluctuations is unambiguous, the total density analysis has been complicated in the past by aerodynamical disturbance...