Mateusz Andrzej Kȩdzior

12 Questions 9 Answers 0 Followers

Questions related from Mateusz Andrzej Kȩdzior

Which polarisation in microwave C-band is most valuable for observing soil moisture change?

I'm searching for the articles which helps to answer the question: which polarisation is most valuable for tracking soil moisture changes? I found information for 9.0 Ghz (link to this question),...

06 June 2016 892 4 View

Remote calculations using ESA data products - which tools should I use?

I need to calculate the difference raster (between day X and (X + 3 days) ) for the following ESA products: Sentinel 1 radar: Sentinel_diff SMOS L3 (or L2): SMOS_diff Having them, I wish to...

05 May 2016 1,380 2 View

Disaggregation using linear dependence of radar backscatter change on soil moisture change - do you have any software recommendations?

I'm going to apply disaggregation algorithm described in the linked article. I'm going to use Sentinel-1 data as the high resolution data source. I thought about implementing mentioned algorithm...

05 May 2016 3,104 2 View

Is averaging of remote sensing data a source of the systematic bias?

Some of the remote sensing products are averages (or more precisely "composites", because they're not simple averages) of the instantaneous values for the satellite fly over time. An example of...

03 March 2016 5,950 2 View

Drought index SPEI why different time scale products have values for each month?

According to http://sac.csic.es/spei/home.html to calculate SPEI we use precipitation and potential evapotranspiration (PET): "the difference between the precipitation (P) and PET for the month i...

02 February 2016 5,132 6 View

Will cross-correlation between near surface and subsurface soil moisture be the same for different products?

Once precipitation fall into surface it affects surface soil moisture and after infiltration occurs, subsurface SM. Thus, I assume that both layers are always correlated, but with some shifts in...

01 January 2016 1,994 4 View

How does surface soil moisture change with depth?

In most (many?) articles dedicated to validate surface soil moisture products from ASCAT, SMOS or SMAP, authors compares SM estimates against in-situ measurement on fixed depth (for example 5 cm)....

08 August 2015 10,043 22 View

What is Integerized Sinusoidal (ISIN) projection?

Dear Researchers, I need to download LAI data set and transform it to the WGS84 (EPSG:4326). I found following resource:http://glcf.umd.edu/data/lai/ As I can see in the description, following...

04 April 2015 5,353 5 View

Are there any articles that analyses QC (Quality Control flags) in L-Band?

I'm aware of work Lee and Im 2015 (linked below) dedicated for bias correction in Africa.However, I wonder if there're more works that analyses QC flags in L-Band for global areas (or at least...

01 January 1970 7,703 0 View

Are there any GLDAS database counterparts / equivalents?

Global Land Data Assimilation System (GLDAS) provides public access to the results of global-scale modelling using four land surface models (LSMs). GLDAS provides information about land surface...

01 January 1970 3,332 2 View

Are there any studies that use lagged remote sensing measurements of near-surface soil moisture for flood and/or drought monitoring?

In the literature, lagged measurements of near-surface SM in microwave band are related with root-zone soil moisture. Thus, I wonder if there are studies that relates them (lagged SM) with drought...

01 January 1970 1,996 3 View

What is the formal definition of the SMOS snapshot?

I'm looking for a formal definition of SMOS snapshot (I guess that it might apply to other missions as well). Intuitively, I understand it as a one image taken by the mission sensor (MIRAS in case...

01 January 1970 2,061 0 View