The assembled diffraction intensity group "/adi"

The raw data .nc files described in Sec. 2.1 contain considerable detail on the experimental settings used to record a particular exposure. However, the goal in the experiment is to produce a single, high quality file representing the processed diffraction data (possibly along with some indication of the error of various pixels). The "/adi" group contains both the data, and a structure adi_struct of related parameters. The elements of this structure are as follows:

photon_scaling: multiply adi_array by this factor to convert it into photons per pixel. Set to zero if unknown.
error_scaling: scaling factor $s_{e}$ to apply to error_array. See 2.2.3.
lambda_meters: x-ray wavelength in meters.
camera_z_meters: CCD camera distance from sample.
camera_x_pixelsize_meters: size of camera pixels in the nx direction, in meters.
camera_y_pixelsize_meters: size of camera pixels in the nx direction, in meters.
theta_x_radians: GMR position (rotation about the horizontal transverse direction) to which the sample was set to be at. Obsolete since already defined in "/ainfo" group?
theta_y_radians: orientation of the specimen about the vertical transverse direction. Set to zero if unknown. Obsolete since already defined in "/ainfo" group?
theta_z_radians: orientation of the specimen about the beam axis direction. Set to zero if unknown. Obsolete since already defined in "/ainfo" group?
xcenter_offset_pixels: location of the true center of the array relative to pixel $n_{x}/2$.
ycenter_offset_pixels: location of the true center of the array relative to pixel $n_{y}/2$.

Microscope User 2008-04-30