Version 05.06.19
The minimal requirements for a portable station to be used for earthquake location within TexNet is:
- Sensor:
- 3-component orthogonal axis seismometer
- Nominally flat velocity sensor response 10sec to 100Hz
- Steel case for posthole/direct burial installation
- Sensor cable should have a 1000PSI connector
- Datalogger:
- 24-bit digitizer
- Sampling rate at least up to 200 sps
- Integrated seedlink server for continuous streams of both waveform data and State-of-Health
- File transfer via ethernet to the TexNet Hub
- Timing using GPS
- Communication preferably using a web based user interface
- Local storage
- Enclosure, power, and communication
- Ensure autonomous operation through solar power
- Ensure autonomous operation on solar power for a minimum of two (2) years.
- A pole mounted water-tight enclosure with mountable solar panel on top. Enclosures must remain functional during deployments lasting at least two (2) years or longer.
- Preferably two 110Ah batteries, a power regulator (with a user defined fail-safe shutoff voltage) and a 160W solar panel or comparable set up
- Data should be sent by telemetry to TexNet in real time
- Other requirements
- Sensor installation depth should be from 3-6 ft
- Orientation preferably should be so that horizontal orthogonal components are to North (magnetic) and East. If not, azimuth clockwise from North (magnetic) should be defined.
- Provide metadata information in the form of: (a) Dataless SEED[1], (b) Response files[2], and (c) FDSN Station XML[3]
- Station uptime should be more than 95%
- Station should be fenced to avoid noise
[1] http://ds.iris.edu/ds/nodes/dmc/data/formats/dataless-seed/