Data Item _diffrn_detector_element.reference_center_units
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General 
- Item name
- _diffrn_detector_element.reference_center_units
- Category name
- diffrn_detector_element
- Attribute name
- reference_center_units
- Required in PDB entries
- no
- Used in currrent PDB entries
- No
Item Description
The value of _diffrn_detector_element.reference_center_units
specifies the units in which the values of
'_diffrn_detector_element.reference_center_fast' and
'_diffrn_detector_element.reference_center_slow'
are presented. The default is 'mm' for millimetres. The
alternatives are 'pixels' and 'bins'. In all cases the
center distances are measured from the center of the
first pixel, i.e. in a 2x2 binning, the measuring origin
is offset from the centers of the bins by one half pixel
towards the first pixel.
If 'bins' is specified, the data in
'_array_intensities.pixel_fast_bin_size',
'_array_intensities.pixel_slow_bin_size', and
'_array_intensities.pixel_binning_method'
is used to define the binning scheme.
Data Type 
- Data type code
- code
- Data type detail
- code item types/single words ...
- Primitive data type code
- char
- Regular expression
- [_,.;:"&<>()/\{}'`~!@#$%A-Za-z0-9*|+-]*
Controlled Vocabulary
| Allowed Value | Details |
|---|---|
| bins | detector bins |
| mm | millimetres |
| pixels | detector pixels |
Controlled Vocabulary at Deposition
| Allowed Value | Details |
|---|---|
| bins | detector bins |
| mm | millimetres |
| pixels | detector pixels |