Changes for page Integrated Distributed Acoustic Sensing (iDAS)

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1		-=== **Silixa iDAS Setup Manual for Reoccupying/Duplicating Experiment** ===
	1	+= **DAS Data Collection System** =
2	2
	3	+==== **1. Interrogator Unit** ====
	4	+
	5	+* **Function:** The interrogator unit is the core component of a DAS system. It sends laser pulses through the optical fiber and measures the backscattered light.
	6	+* **Recording Information:** It records various settings such as the optical system configurations, spatial sampling rates, and the duration of data acquisition.
	7	+* **Multiple Interrogators:** More than one interrogator may be used in an experiment. Each unit should have a unique identifier and is described in its respective metadata block.
	8	+
	9	+==== **2. Surface Installation** ====
	10	+
	11	+* **Cable Arrangement:** The optical fiber cable can be a single long continuous cable or multiple cables with connectors, used across different installation environments.
	12	+* **Cable Types:** Cables may vary in construction types based on the installation environment.
	13	+* **Geographical Metadata:** Parameters related to geographical location are specified for easy searchability in databases.
	14	+
	15	+==== **3. Fiber Optic Cable** ====
	16	+
	17	+* **Cable Composition:** Several optical fibers may be enclosed within one cable.
	18	+* **Metadata Identification:** The metadata identifies each individual fiber used in the acquisition, including its intrinsic properties.
	19	+
	20	+==== **4. Installation Environments** ====
	21	+
	22	+* **Shallow Burial:** The cable can be shallowly buried.
	23	+* **In-Conduit Installation:** The cable can also be installed within a conduit.
	24	+* **Water Installation:** Suitable for underwater environments.
	25	+
	26	+==== **5. Channels** ====
	27	+
	28	+* **Sensor Distribution:** Channels represent sensors distributed along the fiber array at fixed intervals.
	29	+* **Physical Location Determination:** The physical locations of these channels are ascertainable through methods like tap tests and GPS tracking.
	30	+* **Metadata for Channels:** Each channel or group of channels has its own metadata block, detailing specifics like location and properties.
	31	+
	32	+=== ===
	33	+
3	3	----
4	4
5		-==== **General Information** ====
	36	+=== ===
6	6
	38	+= **Pre-processing Steps for DAS Data (2.5 months, 90 TB)** =
	39	+
	40	+1. (((
	41	+**Create a Deployment Log**
	42	+
	43	+* Document key details like photonics settings, duration of data collection, instances of hard disk failure, power outages, etc.
	44	+)))
	45	+1. (((
	46	+**Generate Geographic Coordinates**
	47	+
	48	+* Assign latitude and longitude coordinates to each DAS channel for spatial referencing.
	49	+)))
	50	+1. (((
	51	+**Data Conversion**
	52	+
	53	+* Convert the raw DAS time series data from counts to strain rate, which is more meaningful for seismic analysis.
	54	+)))
	55	+1. (((
	56	+**Data Decimation**
	57	+
	58	+* Reduce the sampling rate from 1000 Hz to 100 Hz. This step is essential to manage data volume and focus on frequencies of interest for seismic activities.
	59	+)))
	60	+1. (((
	61	+**Extract Specific Time Series**
	62	+
	63	+* Isolate time series data of special interest, such as those related to earthquake events, for detailed analysis.
	64	+)))
	65	+1. (((
	66	+**Data Hosting**
	67	+
	68	+* Store the processed data on Research School of Earth Sciences (RSES) clusters and the National Computational Infrastructure (NCI) for accessibility and further analysis.
	69	+)))
	70	+1. (((
	71	+**Extract Data and Instrument Response from Seismic Nodes**
	72	+
	73	+* Retrieve both the raw data and the corresponding instrument response characteristics for accurate interpretation of the seismic signals.
	74	+)))
	75	+1. (((
	76	+**Long-term Archiving and Data Sharing**
	77	+
	78	+* Ensure that the data is archived in a format and location that supports long-term preservation and accessibility, such as the AuScope Distributed Acoustic Sensing (DAS) Collection.
	79	+)))
	80	+1. (((
	81	+**Data Access and Record Keeping**
	82	+
	83	+* Maintain records and access paths (e.g., NCI local file path) for the data, including metadata and other associated records, to facilitate future research and data sharing.
	84	+)))
	85	+
	86	+=== ===
	87	+
	88	+=== ===
	89	+
	90	+=== ===
	91	+
	92	+=== ===
	93	+
	94	+=== ===
	95	+
	96	+----
	97	+
	98	+= **Silixa iDAS Setup Manual for Reoccupying/Duplicating Experiment** =
	99	+
	100	+= **General Information** =
	101	+
7	7	* **Experiment Name:** ~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~__
8	8	* **Local Date:** ~_~_~_~_/~_~__**/202**
9	9	* **Local Time:** ~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~__
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