Acquisition metadata
Acquisition Metadata
The Acquisition metadata describes the acquisition parameters set by the user on a particular interrogator. While different interrogator vendors may implement various photonics design and algorithms which are not easily translatable across interrogators, the Acquisition metadata intends to capture the critical acquisition attributes that are commonly required to analyze and interpret the output time series or matrices. These attributes are carefully defined to be standardized across all interrogator systems.
While the Acquisition metadata listed below should be self-sufficient for most purposes, the native headers provided by interrogator vendors can be preserved for expert users.
Required fields (mark with an asterisk, and indicated in the tables below) acquisition_id* | interrogator_id* | acquisition_start_time* | acquisition_end_time* | acquisition_sample_rate* | acquisition_sample_rate_unit* | gauge_length* | gauge_length_unit* | unit_of_measure* | number_of_channels* | spatial_sampling_interval* | spatial_sampling_interval_unit*
Optional fields pulse_rate | pulse_rate_unit | pulse_width | pulse_width_unit | comment
acquisition_id
attributeID | acquisition_id |
Description | Unique identifier of the data acquisition, assigned by data provider. Identifier should have a maximum of 8 alphanumeric characters with no special characters (e.g., underscores, period, dash). One identifier per acquisition settings. |
Required | True |
Type | String |
Style | Alphanumeric |
Units or options | -- |
Example | A001 |
interrogator_id
attributeID | interrogator_id |
Description | Unique identifier of the interrogator unit used in this data acquisition. The acquisition_id must nest within this interrogator_id. |
Required | True |
Type | String |
Style | Alphanumeric |
Units or options | -- |
Example | IU001 |
acquisition_start_time
attributeID | acquisition_start_time |
Description | Start time of this data acquisition in UTC. |
Required | True |
Type | String |
Style | ISO formatted datetime |
Units or options | -- |
Example | 2016-03-11T16:46:18.000Z |
acquisition_end_time
attributeID | acquisition_end_time |
Description | End time of this data acquisition in UTC. if data acquisition is still in operation, use a date in the future (e.g. 2999-01-01T00:00:00.000Z). |
Required | True |
Type | String |
Style | ISO formatted datetime |
Units or options | na |
Example | 2016-03-26T01:01:15.000Z |
acquisition_sample_rate
attributeID | acquisition_sample_rate |
Description | The rate at which the interrogator provides output data. |
Required | True |
Type | Integer |
Style | na |
Units or options | na |
Example | 1000 |
acquisition_sample_rate_unit
attributeID | acquisition_sample_rate_unit |
Description | Unit of acquisition sample rate. |
Required | True |
Type | String |
Style | Controlled vocabulary |
Units or options | Hertz |
Example | Hertz |
gauge_length
attributeID | gauge_length |
Description | The averaging length along the fiber for a measurement, determined at experiment setup and used during acquisition. |
Required | True |
Type | Float |
Style | na |
Units or options | na |
Example | 10 |
gauge_length_unit
attributeID | gauge_length_unit |
Description | Unit of gauge length. |
Required | True |
Type | String |
Style | Controlled vocabulary |
Units or options | meter |
Example | meter |
unit_of_measure
attributeID | unit_of_measure |
Description | Unit of measure of archived data set. This may be the same unit as the Interrogator Unit of Measure if the data are raw. |
Required | True |
Type | String |
Style | Controlled vocabulary |
Units or options | [count |
Example | count |
number_of_channels
attributeID | number_of_channels |
Description | The total number of sampling points along the fiber as output from the interrogator, referred to as NumberOfLoci in PRODML. |
Required | True |
Type | Integer |
Style | na |
Units or options | na |
Example | 8720 |
spatial_sampling_interval
attributeID | spatial_sampling_interval |
Description | The channel spacing, or offset, between channels. |
Required | True |
Type | Float |
Style | na |
Units or options | na |
Example | 1.000 |
spatial_sampling_interval_unit
attributeID | spatial_sampling_interval_unit |
Description | Unit of spatial sampling interval. |
Required | True |
Type | String |
Style | Controlled vocabulary |
Units or options | meter |
Example | meter |
pulse_rate
attributeID | pulse_rate |
Description | Rate at which the interrogator unit interrogates the fiber sensor. |
Required | False |
Type | Float |
Style | na |
Units or options | -- |
Example | 1000 |
pulse_rate_unit
attributeID | pulse_rate_unit |
Description | Unit of pulse rate. |
Required | False |
Type | String |
Style | Controlled vocabulary |
Units or options | Hertz |
Example | Hertz |
pulse_width
attributeID | pulse_width |
Description | Width of the pulse sent down the fiber in unit of time. |
Required | False |
Type | Float |
Style | na |
Units or options | -- |
Example | -- |
pulse_width_unit
attributeID | pulse_rate_unit |
Description | Unit of pulse width. |
Required | False |
Type | String |
Style | Controlled vocabulary |
Units or options | nanoseconds |
Example | nanoseconds |
comment
attributeID | comment |
Description | Additional comments. |
Required | False |
Type | String |
Style | Free form text |
Units or options | -- |
Example | na |
Last updated