Changeset 27aabc1 in sasview


Ignore:
Timestamp:
Jan 4, 2017 6:28:20 AM (6 years ago)
Author:
smk78
Branches:
master, ESS_GUI, ESS_GUI_Docs, ESS_GUI_batch_fitting, ESS_GUI_bumps_abstraction, ESS_GUI_iss1116, ESS_GUI_iss879, ESS_GUI_iss959, ESS_GUI_opencl, ESS_GUI_ordering, ESS_GUI_sync_sascalc, costrafo411, magnetic_scatt, release-4.1.1, release-4.1.2, release-4.2.2, ticket-1009, ticket-1094-headless, ticket-1242-2d-resolution, ticket-1243, ticket-1249, ticket885, unittest-saveload
Children:
ae9b8bf
Parents:
c1681ea
Message:

Changes to smearing help at
/sasview/src/sas/sasgui/perspectives/fitting/media/sm_help.rst

File:
1 edited

Legend:

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  • src/sas/sasgui/perspectives/fitting/media/sm_help.rst

    r7805458 r27aabc1  
    2020================== 
    2121 
    22 Sometimes it will be necessary to correct reduced experimental data for the 
    23 physical effects of the instrumental geometry in use. This process is called 
    24 *desmearing*. However, calculated/simulated data - which by definition will be 
    25 perfect/exact - can be *smeared* to make it more representative of what might 
    26 actually be measured experimentally. 
    27  
    28 SasView provides the following three smearing algorithms: 
     22Sometimes the instrumental geometry used to acquire the experimental data has  
     23an impact on the clarity of features in the reduced scattering curve. For  
     24example, peaks or fringes might be slightly broadened. This is known as  
     25*Q resolution smearing*. To compensate for this effect one can either try and  
     26remove the resolution contribution - a process called *desmearing* - or add the  
     27resolution contribution into a model calculation/simulation (which by definition  
     28will be exact) to make it more representative of what has been measured  
     29experimentally - a process called *smearing*. SasView will do the latter. 
     30 
     31Both smearing and desmearing rely on functions to describe the resolution  
     32effect. SasView provides three smearing algorithms: 
    2933 
    3034*  *Slit Smearing* 
    3135*  *Pinhole Smearing* 
    3236*  *2D Smearing* 
     37 
     38SasView also has an option to use Q resolution data (estimated at the time of  
     39data reduction) supplied in a reduced data file: the *Use dQ data* radio button. 
     40 
     41.. ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ 
     42 
     43dQ Smearing 
     44----------- 
     45  
     46If this option is checked, SasView will assume that the supplied dQ values  
     47represent the standard deviations of Gaussian functions. 
    3348 
    3449.. ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ 
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