passive microwave observations
The impact of land surface temperature on soil moisture anomaly detection from passive microwave observations
... years passive microwave observations have been used to retrieve soil moisture from the Earth’s ...frequency observations have the most sen- sitivity to soil moisture, therefore the current ...
17
Inter-comparison and evaluation of sea ice algorithms: towards further identification of challenges and optimal approach using passive microwave observations
... The algorithms shown in Fig. 3 overestimate SIC, which can be caused by higher Tbs in the areas between melt ponds. During summer these areas comprise wet snow and/or bare ice with a different physical structure than ...
21
Monitoring soil wetness variations by means of satellite passive microwave observations: the HYDROPTIMET study cases
... In order to try to overcome (or reduce) the problems related to vegetation and/or roughness effects, a new technique has already been suggested (Lacava et al., 2005). It is based on a general data analysis strategy, the ...
10
Towards variational retrieval of warm rain from passive microwave observations
... It is concluded that a variational retrieval can add infor- mation relative to operational precipitation products, albeit in limited circumstances. Treatment of correlated forward model errors, especially those caused by ...
23
Nordic Snow Radar Experiment
... near-continuous observations of snow cover radar signatures in the boreal forest/taiga region using a tower-based configuration, supported by frequent in situ ...multi-frequency microwave radiometer ...
13
Error characterisation of global active and passive microwave soil moisture datasets
... and passive datasets can be as- cribed to the observation principle (active versus passive) and how much depends on the retrieval method ...band passive microwave observations over ...
12
The sensitivity of land emissivity estimates from AMSR E at C and X bands to surface properties
... Abstract. Microwave observations at low frequencies ex- hibit more sensitivity to surface and subsurface properties with little interference from the ...using passive microwave ...
13
Spatiotemporal variability and decadal trends of snowmelt processes on Antarctic sea ice observed by satellite scatterometers
... The previously described seasonal cycle of snow processes and the related backscatter signal (Sect. 1) are typically found on perennial sea ice (Figs. 2 and 4a). The strong sum- mer backscatter rise may be interrupted by ...
16
Detecting cloud contamination in passive microwave satellite measurements over land
... IR observations, but only under clear-sky ...information. Passive microwave observations from satellites can partly fill this gap: they are much less sensitive to clouds and can provide ...
13
Dimensionality reduction in Bayesian estimation algorithms
... of passive microwave observations of precipitation over land, the signal due to rain rate is intentionally weak in ab- solute magnitude relative to the background noise but with a spectral component ...
10
Schlenz, Florian (2012): Coupled land surface and radiative transfer models for the analysis of passive microwave satellite observations. Dissertation, LMU München: Fakultät für Geowissenschaften
... temperature observations in an iterative inversion algorithm allows to disentangle vegetation and soil moisture ...soil’s microwave emission, are retrieved ...L-band Microwave Emission of the ...
106
The microwave emissivity variability of snow covered first-year sea ice from late winter to early summer: a model study
... The microwave emissivity of snow-covered sea ice is not only sensitive to the presence of melt water but varies in magnitude along with the seasonal changes that occur in snow stratification, grain sizes, density ...
14
Radiometric correction of observations from microwave humidity sounders
... resentative of the climate; thus they may be used for studies related to climate change and variability. As stated before, because of negligible diurnal cycle over the tropical oceans, the orbital drift should not ...
10
A simple parameterisation for retrieving soil moisture from passive microwave data
... This final example uses data collected over five different vegetation covers and a sandy loam soil (Wang et al., 1984). The microwave brightness temperature was monitored sporadically through the growing period ...
10
Mixing layer height retrievals by multichannel microwave radiometer observations
... sensing observations from instruments like lidar, wind profiling radar, or ...by microwave radiometers ...direct observations (brightness temperatures, Tb) instead of retrieved ...Tb ...
11
The new Passive microwave Neural network Precipitation Retrieval (PNPR) algorithm for the cross-track scanning ATMS radiometer: description and verification study over Europe and Africa using GPM and TRMM spaceborne radars
... TRMM-PR observations (in particular the rain type flag and the freezing level height) and different climatic regions in order to cover as much as possible the climatic variability in the area of in- terest with a ...
20
Antarctic summer sea ice concentration and extent: comparison of ODEN 2006 ship observations, satellite passive microwave and NIC sea ice charts
... of observations increased on 22 De- cember when a more highly concentrated sea ice area was encountered and were made continuously through the pack ice zone of the Ross Sea from 23 to 25 ...Ice observations ...
9
Simulation of Electromagnetic Wave Propagation in Microwave Directional Couplers and Rat-Race Hybrid Coupler Using Open Source Finite Element Software
... are microwave passive devices used in power division. Microwave directional coupler is a four- port circuit designed such a way that each pair of ports is always ...
9
Designs and Analyses of Some RF/Microwave Passive Elements on Cylindrical Cpws
... There is a growing interest in non-planar transmission lines recently. Since these type transmission lines are quite flexible they can be especially applied in aircraft, missiles, and mobile communication applications in ...
9
Advanced Microwave Active & Passive Remote Sensing Application and Its Utilization
... called passive sensors. passive sensors can only be used to detect energy when the naturally occurring energy is ...much microwave radiation, compared to sea ...
8