Output data

QRS — Internal Igor storage

../_images/OutputData1.png

Data are stored internally within the Igor experiment (when selected) in root:SAS:, organized in folders named by sample and integration type:

  • nameOfSample_C — circular average

  • nameOfSample_Angle_halfWidth — sector average around direction Angle with sector half-width halfWidth

Wave names

X-axis data

q_NameOfSample_C (or _Angle_halfWidth) — Q vector in Å-1

t_NameOfSample_C (or _Angle_halfWidth) — 2θ, when output is with respect to two-theta

d_NameOfSample_C (or _Angle_halfWidth) — d-spacing, when output is with respect to d

Y-axis data

r_NameOfSample_C (or _Angle_halfWidth) — intensity (if calibrated, in units of cm-1; thickness is internally converted to cm)

Error

s_NameOfSample_C (or _Angle_halfWidth) — uncertainty for intensity

Other

w_NameOfSample_C (or _Angle_halfWidth) — width of each Q/d/2θ bin. Used for LUT output and bin-width smearing. For linear binning this is constant (Max − Min) / numOfPoints; for log binning it varies with bin position.

Line profile data

For line profile output, wave names include a profile indicator and the Q value at which the profile was calculated. For example, a GI Vertical line profile might be named:

gc_saxs_395__GI_VLp_0.0077

where:

  • gc_saxs_395_ — part of the source image name

  • GI_VLp_ — GI Vertical Line profile indicator

  • 0.0077 — the Qy value in Å-1

Exported ASCII files contain columns: Int, error, Q, qx, qy, qz, with a header and column labels.

Waves saved in Igor for line profiles:

r_NameOfSample_ProfileIndicator_Qvalue — intensity

q_NameOfSample_ProfileIndicator_Qvalue — Q [Å-1]

s_NameOfSample_ProfileIndicator_Qvalue — uncertainty

qy_NameOfSample_ProfileIndicator_Qvalue — Qy [Å-1]

qz_NameOfSample_ProfileIndicator_Qvalue — Qz [Å-1]

qx_NameOfSample_ProfileIndicator_Qvalue — Qx [Å-1] (generated only for GI profiles)

Each intensity wave has an attached wave note containing useful metadata, for example:

CalibrationFormula=1*((Sa2D));CurrentMaskFileName=A mask_mask;
QvectorNumberPoints=300;CircularAverage=1;

ASCII export

See ASCII export from Irena.