# Interrogator metadata

**Interrogator Metadata**

* The Interrogator metadata contains information about the interrogator unit used for the data collection. More than one interrogator may be operating during an experiment, therefore each unit is given a unique identifier and described in individual Interrogator metadata blocks.
* Required fields *(mark with an asterisk, and indicated in the tables below)*\
  [interrogator\_id\*](#interrogator_id) | [manufacturer\*](#manufacturer) | [model\*](#model) |
* Optional fields\
  [serial\_number](#serial_number) | [firmware\_version](#firmware_version) | [comment](#comment)

***

#### interrogator\_id

| attributeID          | interrogator\_id  `Required`                                                                                                                                                                                              |
| -------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **Description**      | Unique identifier of the interrogator unit used in the experiment, assigned by data provider. Identifier should have a maximum of 8 alphanumeric characters with no special characters (e.g., underscores, period, dash). |
| **Required**         | True                                                                                                                                                                                                                      |
| **Type**             | String                                                                                                                                                                                                                    |
| **Style**            | Alphanumeric                                                                                                                                                                                                              |
| **Units or options** | --                                                                                                                                                                                                                        |
| **Example**          | IU001                                                                                                                                                                                                                     |

#### manufacturer

| attributeID          | manufacturer  `Required`               |
| -------------------- | -------------------------------------- |
| **Description**      | Manufacturer name of the interrogator. |
| **Required**         | True                                   |
| **Type**             | String                                 |
| **Style**            | Free form text                         |
| **Units or options** | --                                     |
| **Example**          | Silixa                                 |

#### model

| attributeID          | model  `Required`                 |
| -------------------- | --------------------------------- |
| **Description**      | Model number of the interrogator. |
| **Required**         | True                              |
| **Type**             | String                            |
| **Style**            | Free form text                    |
| **Units or options** | --                                |
| **Example**          | iDAS                              |

#### serial\_number

| attributeID          | serial\_number  `Optional`         |
| -------------------- | ---------------------------------- |
| **Description**      | Serial number of the interrogator. |
| **Required**         | False                              |
| **Type**             | String                             |
| **Style**            | Free form text                     |
| **Units or options** | --                                 |
| **Example**          | 16043                              |

#### firmware\_version

| attributeID          | firmware\_version  `Optional`                                  |
| -------------------- | -------------------------------------------------------------- |
| **Description**      | Firmware version of the software used within the interrogator. |
| **Required**         | False                                                          |
| **Type**             | String                                                         |
| **Style**            | Free form text                                                 |
| **Units or options** | --                                                             |
| **Example**          | --                                                             |

#### comment

| attributeID          | comment  `Optional`  |
| -------------------- | -------------------- |
| **Description**      | Additional comments. |
| **Required**         | False                |
| **Type**             | String               |
| **Style**            | Free form text       |
| **Units or options** | --                   |
| **Example**          | --                   |