Data Item _diffrn_scan_axis.reference_angle

General

Item name
_diffrn_scan_axis.reference_angle
Category name
diffrn_scan_axis
Attribute name
reference_angle
Required in PDB entries
implicit
Used in currrent PDB entries
No

Item Description

The setting of the specified axis in degrees against which measurements of the reference beam centre and reference detector distance should be made. In general, this will agree with _diffrn_scan_frame_axis.reference_angle. If the individual frame values vary, then the value of _diffrn_scan_axis.reference_angle will be representative of the ensemble of values of _diffrn_scan_frame_axis.reference_angle (e.g. the mean). If not specified, the value defaults to zero.

Data Type

Data type code
float
Data type detail
float item types are the subset of numbers that are the floating point numbers.
Primitive data type code
numb
Regular expression
-?(([0-9]+)[.]?|([0-9]*[.][0-9]+))([(][0-9]+[)])?([eE][+-]?[0-9]+)?
Default value
0.0
Units
degrees