Data Item _em_map_resolution.nyquist_frequency

General

Item name
_em_map_resolution.nyquist_frequency
Category name
em_map_resolution
Attribute name
nyquist_frequency
Required in PDB entries
no
Used in currrent PDB entries
No

Item Description

The Nyquist frequency is double the sampling step. e.g. for data sampled at 5 angstroms the Nyquist frequency is 1/10 angstroms. It is important to have the sampling rate of the data high enough so that the image information stays sufficiently away from the Nyquist frequency, otherwise there is a danger that the high- resolution information in both of the reconstruction volumes may be correlated.

Data Type

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