wiki:SIS/glossary
Last modified 5 months ago Last modified on 03/28/17 12:26:49

Glossary

  1. Glossary
    1. A
    2. B
    3. C
    4. D
    5. E
    6. F
    7. G
    8. H
    9. I
    10. J
    11. K
    12. L
    13. M
    14. N
    15. O
    16. P
    17. Q
    18. R
    19. S
    20. T
    21. U
    22. V
    23. W
    24. XYZ

Jump to a particular alphabetical letter using the index links at right.

Further information on these terms can be found in the SEED manual, available from FDSN Publications.

A

  • A/D - Analog to digital converter
  • A/D Channels - A physical A/D channel (other names: P-Channel or Logger Module). A physical A/D channel is assigned to a specific pin number on a data logger.
  • Azimuth - Angular measurement in a spherical coordinate system. Measured in degrees [0 to 360], clockwise from a reference azimuth (typically True North).

B

  • Batch Enter Values when Creating Equipment Template - For loggers that have dozens of pins, users creating an equipment template can enter a single value for sensitivity and other fields, with the option to apply those values to all subsequent pins, like a "Copy first row" button/checkbox. See instructions at Batch Enter Values when Creating Equipment Template
  • Block Length, also called Data Record Length - Length of an individual record, in bytes. In SEED, this is often 512 or 4096 bytes.
    • SEED Manual definition: The exponent (as a power of two) of the record length for these data. The data record can be as small as 256 bytes but never greater than 4096 bytes. Place a “12” in this field for a 4096 byte record. 4096 is preferred.
    • To batch change the Block Length setting on various channels, use Batch Operations in Channel Manager; example tutorial (for SIS v.1) available at Batch Operations on Channel Configuration Epochs

C

  • Calibrate Unit - Indicate volts or amps. To batch change the Calibrate Unit setting on various channels, use Batch Operations in Channel Manager; example tutorial (for SIS v.1) available at Batch Operations on Channel Configuration Epochs
  • Category, Equipment - Secondary-level groupings of equipment, just below the hierarchal level "Group Category." For example, under the Group Category "Power," you have the Equipment Categories BATTERY, CHARGER, MODULATOR-BOX, POWER-DISTR-BOX, SENSOR HOST BOX, SOLAR-CHARGER, and SOLAR-PANEL
  • Category, Group - High-level groupings of equipment, which at this time are GPS, Power, Seismic-Equipment, and Telemetry
  • CGS - California Geological Survey
  • Channel Code - SEED channel code
  • Channel Manager - Interface found on any Station Summary page that allows you to edit a station's channel settings, on and off dates, epochs, etc.; tutorial available (for SIS v.1) at Channel Manager
  • Channels (physical) - also called A/D Channels or Logger Modules. A physical A/D channel for a specific sensor axis (Vertical, N/S, or E/W). Some data loggers have swappable channels and some do not.
  • Channels (virtual) - Also called State of Health Channel. In some loggers, may correspond to inputs on an auxiliary board for temperature, pressure, etc., but may not.
  • Clip (related to Channels) - Sample counts at which signal clips
  • Clock Drift - When a clock does not run at the exact right speed compared to another clock, or the inherent timing shift caused by sample rate filters.
    • SEED Manual definition: A tolerance value, measured in seconds per sample, used as a threshold for time error detection in the data. The number of samples in a record are multiplied by this value to calculate a maximum drift allowed for the time in the next record. If the difference in times is less than this drift, consider them in the same time series.
    • To batch change the Clock drift setting on various channels, use Batch Operations in Channel Manager; example tutorial (for SIS v.1) available at Batch Operations on Channel Configuration Epochs
  • Clone - Copy all settings, as in cloning channels. To batch clone channels, use Batch Operations in Channel Manager; example tutorial (for SIS v.1) available at Batch Operations on Channel Configuration Epochs
  • Co-located Sites - Sites related by equipment and/or location. You can designate a station as a co-located site, edit the co-located site code, or remove a current co-located site from a station's Site Detail page; see instructions at Co-Located Sites
  • Corner Frequency - That period (or frequency) which appears on an amplitude-frequency plot as a "corner" or bend in the response curve.
    • Corner frequency and natural frequency are the same property. The rate at which a pendulum swings with no forcing is its natural period (or frequency). That period (or frequency) appears on an amplitude-frequency plot as a "corner" or bend in the response curve. So they are the same idea - it's just that one is a time/rate description and the other is a frequency plot description.
    • While natural frequency (or period) is an inherent property of the instrument, some model names include various natural frequency options, e.g., the Guralp CMG-3T can come with a natural period of 30, 60, 100, 120 or 360 seconds. Once purchased, the frequency you ordered should not change by very much; you can check for undesired deviations when you calibrate. It's possible to describe them in the instrument response by adjusting the poles and/or zeros, if needed.
    • Also see Term: Frequency
  • COSMOS - Consortium of Organizations for Strong Motion Observation Systems; see Cosmos
  • CSV File Export - You can create a .csv file (e.g., spreadsheet that you can view in MS Excel or similar program) that captures a large list of data. You can also get such a display of certain views in SIS. For more details and instructions, see CSV File Export
  • Custom Links - (previously called External Links) connect pages to resources outside of SIS, e.g., a station photo album or e-mail archive hosted on a separate server. You can add Custom Links at the Network, Site, Equipment, Model and Category levels; see instructions at Adding Custom Links to SIS
  • Cutoff (related to Channels) - Two-second averaged absolute value amplitude counts for coda magnitude algorithms

D

  • Dataless SEED - A volume which contains metadata only, including instrument responses, instrument coordinates, compression type, etc.
  • Date Format - In SIS, acceptable inputs are YYYY-MM-DD or YYYY-M-DD or YYYY-M-D or YYYY-MM-D
  • Delete Logger Board Calibrations as a Group - See instructions and caveats at Delete Logger Board Calibrations as a Group
  • Depth - See Emplacement Depth.
  • Dip - The "upness/downness" of a component (as in the azimuth/dip pair for channel orientations); in general it is set to 0 for horizontals and -90 for verticals (unless the vertical component is reversed, and then by convention it is generally +90, unless you are using a different convention). To batch change the Dip setting on various channels, use Batch Operations in Channel Manager; example tutorial (for SIS v.1) available at Batch Operations on Channel Configuration Epochs
  • Double-Ended Output - E.g., a sensor with differential (a positive and negative) output. The peak-to-peak voltage would be the range over which the output goes. Also see IRIS's web page, Kinemetrics Episensor Accelerometer Response, under "Voltage and Output Types."

E

  • East/West Component Sensitivity - A component setting from an instrument's data sheet that allows refinement of results
  • Elevation - Station Elevation is the distance of ground level above sea level, in meters. Channel Elevation is the distance of the sensor above sea level, meters. To batch change the Elevation on various channels, use Batch Operations in Channel Manager; example tutorial (for SIS v.1) available at Batch Operations on Channel Configuration Epochs
  • E-mail - To send an email from SIS regarding a site, sign in to SIS, jump to station involved, and click Send Email For Site in User Actions box. You must fill in recipient e-mail address or other address you wish to use.
  • Emplacement Depth - Distance between ground level and instrument (e.g., from ground level down to borehole sensor), in meters. For downhole sensor, the depth of the sensor under the surface ground level. For underground vaults, the distance from the sensor to the local ground level above. Surface sensors can use zero. To batch change the Emplacement Depth on various channels, use Batch Operations in Channel Manager; example tutorial (for SIS v.1) available at Batch Operations on Channel Configuration Epochs
  • End Online and Begin New - Used to end the epoch of an instrument or channel, and at the same time initiate a new epoch; typically you will edit the new record, e.g., change serial number or other detail. To batch change the online status of various channels, use Batch Operations in Channel Manager; example tutorial (for SIS v.1) available at Batch Operations on Channel Configuration Epochs
  • Epoch - Period of time in which an item is in a specific, tracked state. Some examples in SIS are a period of time when (a) a station is active at a specific lat/long location or (b) a piece of equipment or channel is active at a station. See Epoch Types and Epoch Rules for more details.
  • Epoch Timeline - Graphical representation of each Site's epochs; see Epoch Timeline for examples and instructions on use
  • Equipment - Physical instruments plus non-response devices located at the station or telemetry location. Non-response devices refer to power (such as batteries) and telemetry hardware, and can be extended to include other geodedic equipment.
  • Equipment Template, Batch Enter Values when Creating - For loggers that have dozens of pins, users creating an equipment template can enter a single value for sensitivity and other fields, with the option to apply those values to all subsequent pins, like a "Copy first row" button/checkbox. See instructions at Batch Enter Values when Creating Equipment Template
  • External Links - now called Custom Links, which connect pages to resources outside of SIS, e.g., a station photo album or e-mail archive hosted on a separate server. You can add Custom Links at the Network, Site, Equipment, Model and Category levels; see instructions at Adding Custom Links to SIS

F

  • FDSN - Federation of Digital Seismic Networks, as used in FDSN Station XML
  • FDSN Station Codes list - Station Codes List
  • Find Equipment Form - Use to quickly navigate to equipment using your equipment category and/or its serial number. Instructions at Find Equipment Form
  • FIR (Filters) - Finite Impulse Response (Filters)
  • Frequency Corner - (High or Low) Frequency Corner of the transfer function as defined by manufacturer on datasheet; defined by the poles and zeros
  • Frequency of Sensitivity (Hz) - Frequency at which the sensitivity is valid, e.g., as reported in datasheet
  • Function set - Another way to refer to poles and zeros and other types of response coefficients such as polynomials and high- and low-pass filters. Usually refers only to poles and zeros.

G

  • Gain - SIS considers stage 0 response as gain, and individual stages as sensitivity. SIS calculates overall gain using these formulas.
  • Gain Correction (related to Channels) - Magnitude units correction for coda magnitude algorithms.

H

  • Hub logger - Logger that receives signals from sensors operating at one or more remote SIS sites.

I

  • IIR (Filters) - Infinite Impulse Response (Filters)
  • Input Range - Refers to the full-scale recording capability of an accelerometer (e.g., 2G); inputs greater than the input range will cause the sensor to saturate.
  • Instrument Response - The physical characteristics of the instruments that allows one to generate information from ground motion.
  • Instruments - In SIS, refers to equipment such as loggers, velocity transducers, and accelerometers.
  • Is Template - This is a radio box that is checked/unchecked to indicate if a piece of equipment "is a template" (checked) or "is not a template" (unchecked)

J

K

  • KML Files - File format for Google Earth program that specifies a set of features (place marks, images, polygons, 3D models, textual descriptions, etc.). SIS offers several KML Files to download and view using Google Earth, e.g., "All Known Stations Organized by Network."

L

  • Latitude - North-south position of a point on the Earth's surface, using the WGS84 standard. To batch change the Latitude of various channels, use Batch Operations in Channel Manager; example tutorial (for SIS v.1) available at Batch Operations on Channel Configuration Epochs
  • Links, Custom - (previously called External Links) connect pages to resources outside of SIS, e.g., a station photo album or e-mail archive hosted on a separate server. You can add Custom Links at the Network, Site, Equipment, Model and Category levels; see instructions at Adding Custom Links to SIS
  • Locations - In the previous version of SIS, any location that was specifically not a station was called a Location, e.g., it often referred to Telemetry locations. Currently, all stations, whether GPS, seismic, telemetry, or otherwise, are called Sites and coded by the Lookup code.
  • loccode - Location code, a two-character channel identifier that serves as a tie-breaker when needed. If left blank, SIS inserts 2 blank spaces that are displayed as two hyphens, i.e., --
  • Location Description - A field (in SIS v.1) that allows more characters to better describe the locale represented by the Station Code, e.g., for Station Code CI.BAR, this field reads "Barrett, San Diego County." In SIS v.2, this is called Site Description.
  • Log - A chronological archive. SIS offers the following logs:
    • Log Entries of work performed at a site (station)
      • To view: jump to station involved and click Site Logs in the Site History Links box.
      • To add to the log: sign in to SIS, jump to station involved, click Site Logs, then click Create New Log in User Actions box.
    • Equipment Log Entries of work performed on a type of instrument
      • To view: From SIS home page, click Equipment on top tool bar, then click Equipment Logs under Equipment Views
      • Click Select Filters to open bar and specify the equipment category, model, operator, or other detail
    • User Log Entries of work performed by users at a site
      • To view: From SIS home page, click Users on top tool bar, then click User Action Logs
      • Latest action is on top
    • Operator's List E-mail (SCSN only)
      • To view: jump to station involved and click SCSN Station Updates in the External Links box.
      • To add to the log: sign in to SIS, jump to station involved, and click Send Email For Site in User Actions box. You must fill in the Operators list e-mail address or other address you wish to use.
  • Logger Board - Contains the physical A/D channels, and is characterized by a serial number and the number of A/D channels it has. A board may also be called a channel card or a sensor port. In old Multishear systems, boards could be swapped out and replaced with another board; that is why SIS tracks an install date for each board. (With advent of Q330s, entire logger is now replaced, not any individual components.)
  • Logger Board Calibrations, Delete as a Group - See instructions and caveats at Delete Logger Board Calibrations as a Group
  • Logger Modules - The individual components of a logger board. It is abstract and may refer to:
    1. A physical A/D channel for a specific sensor axis (Vertical, N/S, or E/W). Some data loggers have swappable channels and some do not.
    2. A physical 'Boom' channel for a specific sensor mass-position axis
    3. 'Virtual' modules for the other state-of-health channels. These may correspond to inputs on an auxiliary board for temperature, pressure, etc., but may not.
    4. Channel card sub-component of the logger board in SIS:
      • Logger #1234 -> Logger Board #Board1 -> Channel Card -> Sensor axis component -> 1 or more SEED channel name(s)
      • This is to associate the channel with a particular channel card on a logger board
  • Logger pin - The physical input channel of a digitizer/logger.
  • Longitude - East-west position of a point on the Earth's surface, using the WGS84 standard. To batch change the Longitude of various channels, use Batch Operations in Channel Manager; example tutorial (for SIS v.1) available at Batch Operations on Channel Configuration Epochs
  • Lookup Code - Also called Site Lookup Code. In SIS v2, this is a customizable site identifier comprised of 20 alphanumeric characters (period, hyphen, and underscore allowed) with no spaces, not restricted to the FDSN 5-character standard; will display in all caps. Typically this is your sta (station) code. Examples:
    • If you have a site CI.BAR that houses only seismic equipment, the lookup code could simply be "BAR"
    • If you have two sites at CI.RVR, one analog and one digital, you could designate that the analog site's lookup code be "RVR_ANALOG"
    • The Lookup Code is unique per network, e.g., CI.BAR could have lookup code "BAR" and BK.BAR could have lookup code "BAR".
    • The Lookup Code will not appear in the Station XML or Dataless SEED.

M

  • Mass Position - The position of a seismometer's mass, generally measured as a current or voltage; gives information on how close to center the mass physically is. See Mass Position Recentering Logs
  • Master Tables - In SIS v.2, collections that contain information used by all organizations in SIS, like the list of Units, list of Manufacturers, and list of Models. Editing of the Master Tables is limited to admins and above, since changing a master table changes that list for every RSN in SIS. For more detail including additional examples, see SIS Concepts: Master Tables
  • Mis-wiring, mis-installation, or mis-orientation, notation of - if you want to note that an equipment piece or channel is mis-wired or mis-oriented, you have to flip the sign of either the channel epoch azimuth or dip, or the sensitivity of the instrument component. For example, the user can edit the sensitivity of the east component to be -1500 V/m/s or change the azimuth of the BHE channel from 90 to -90. It is the user's choice on which one to choose. However the user should note that flipping the sign of a data channel's azimuth will only effect that epoch, while changing the sign of a instrument component's sensitivity will affect any seismic installation using that component in its response chain. If a standardized way is desired on how to handle this, RSNs should communicate within their network as to the appropriate standard. SIS does not enforce a standard beyond making sure that whatever method is chosen, the dataless (or StationXML or whatever output) is correct on the output end.
  • Module Span - Scaled sensitivity, particular to EpiSensors. This is often labeled on calibration sheet; see sample_EpiSensor_data_sheet-opt.pdf.
  • Monument Epoch ID - In SIS v2, you can name the various time periods that demark what equipment was at the site.
  • Multi-Site - Installation that includes seismic equipment at more than one SIS site, e.g., a hub logger at one site, and remote sensor(s) at sites at different geographic locations. You can also have a multi-site setup where the sensor is at the same SIS site as the hub logger, but there is usually at least one remote sensor connected to a hub logger. Analog and short-period-telemetered stations are common examples of multi-site stations.

N

  • Name space - In SIS v. 2, a naming scheme used to prevent uniqueness conflicts in responses and projects. Multiple organizations can belong to a name space. For example, the name space “NCEDC” is used by the organizations BDSN and NCSN. This means users from these two organizations by default would use the same group of responses. For more, see [wiki:SIS/UI/Tutorial-v2.0/Intro#SISConcepts3NameSpaces SIS Concepts: Name Spaces].
  • Natural Frequency - The rate at which a pendulum swings with no forcing is its natural period (or frequency).
    • Natural frequency and corner frequency are the same property. While natural frequency is the rate at which a pendulum swings with no forcing, with corner frequency, that period (or frequency) appears on an amplitude-frequency plot as a "corner" or bend in the response curve. So they are the same idea - it's just that one is a time/rate description and the other is a frequency plot description.
    • While natural frequency (or period) is an inherent property of the instrument, some model names include various natural frequency options, e.g., the Guralp CMG-3T can come with a natural period of 30, 60, 100, 120 or 360 seconds. Once purchased, the frequency you ordered should not change by very much; you can check for undesired deviations when you calibrate. It's possible to describe them in the instrument response by adjusting the poles and/or zeros, if needed.
    • Also see Term: Frequency
  • NCEDC - Northern California Earthquake Data Center
  • netcode or Network Code - Two-letter FDSN Network code that is the official designation in SIS of a particular seismic or GPS station's parent network; see List of Networks
  • Network - In SIS, refers to a group of seismic-monitoring stations belonging to a university or other entity; see List of Networks
  • Network External Links - Links to resources outside of SIS, e.g., a station photo album or e-mail archive hosted on a separate server. To add external links at the Network level, see Adding External Links to SIS
  • Non-response devices - Equipment such as power (batteries, solar panels) and telemetry hardware; can be extended to include other geodedic equipment
  • North/South Component Sensitivity - A component setting from an instrument's data sheet that allows refinement of results
  • NRL Picker - Graphical tool that assists in building response info for channels, used in Create (or Augment) Data Stream Template forms, Create (or Augment) Sensor Template forms, among other places. Tool is based on work done by Phillip Crotwell, U. of S. Carolina. See more details at NRL Picker
  • NRL Response - Equipment responses as captured in the IRIS DMC Library of Nominal Responses for Seismic Instruments. SIS daily syncs its database with the NRL, so users can choose up-to-date NRL responses as maintained by IRIS/DMC.

O

  • Off Date - Termination date of a station, epoch, channel, or other instrument.
  • On Date - Creation date of a station, epoch, channel, or other instrument.
  • Operator - Generally, the organization which maintains and collects the data from a station or telemetry location and its equipment. See below for the different levels operator status is tracked in SIS (in certain cases, this organization is also the Owner).
    • Channel Operator
    • Equipment Operator
    • Network Operator
    • Site Operator
    Note: The TIC will decide or approve business rules that ideally will automatically derive Operator status for the above levels, to assist the upload process
  • Operators List - E-mail distribution list that includes all SIS field engineers and dispatch personnel.
    • To send an e-mail to the Operators List: sign in to SIS, jump to station involved, and click Send email to operators list in For Logged-In Users: User Actions box.
    • To view the e-mail archive of a particular station: jump to station involved and click Station Updates/Email archive in the Station Links box.
  • Organization - In SIS v.2, an entity that can own or operate equipment and sites. For more detail including examples, see SIS Concepts: Organizatons.
  • Other Operator - In SIS v.2, the secondary point-of-contact operator for the Site. The Primary Operator is the one listed in each site epoch, as there is only room for one operator.
  • Owner - Generally, the organization which holds the deed to a station or telemetry location's land parcel, or which has a property tag on a piece of equipment. See below for the different levels of ownership, all of which will be tracked in SIS:
    • Channel Owner
    • Equipment Owner
    • Network Owner
    • Site Owner: Landowner
    Note: The TIC will decide or approve business rules that ideally will automatically derive Ownership status for the above levels, to assist the upload process

P

  • Peak amplitude - The maximum absolute value of the signal, also referred to as "single-ended." Peak voltage can be written as Vpk or Vp. See IRIS's web page, Kinemetrics Episensor Accelerometer Response, under "Voltage and Output Types."
  • Peak-to-peak amplitude - The measurement from peak to trough, also referred to as "double-ended." Peak-to-peak voltage can be abbreviated Vpp or Vp-p or Vpkpk or Vpk-pk. See IRIS's web page, Kinemetrics Episensor Accelerometer Response, under "Voltage and Output Types."
  • Pin - A physical pin inset into a board (e.g., data logger pin), that is named after a number and wired to another piece of equipment (e.g., logger pin wired to a place on a sensor)
  • Place - In SIS v.2, the geographic location name in short form. This can be the same as the Site Code (or sta code).
  • Primary Operator - In SIS v.2, the primary point-of-contact operator for the Site. If there is an Other Operator listed, you will only see the Primary Operator in each site epoch, as there is only room for one operator.

Q

R

  • Reason - Explanation for an installation, swap, or other change. To batch change the Reason for edits to channels, use Batch Operations in Channel Manager; example tutorial (for SIS v.1) available at Batch Operations on Channel Configuration Epochs
  • Remove/Delete - Either (a) remove all vestiges of something, or (b) code something with an End Date, e.g., an epoch or channel, while retaining the information for historical purposes. To batch delete epochs or channels, use Batch Operations in Channel Manager; example tutorial (for SIS v.1) available at Batch Operations on Channel Configuration Epochs
  • Response - An umbrella term that describes the various mathematical calculations received from an instrument reacting to ground motion. These calculations are obtained using poles and zeros, channel sensitivity/gain (calculated using these formulas), coefficients, and decimation. For more, see [wiki:SIS/UI/Tutorial-v2.0/Intro#SISConcepts4Responses SIS Concepts: Responses].

S

  • Sample Rate - The number of samples per second per channel. To batch change the Sample Rate on various channels, use Batch Operations in Channel Manager; example tutorial (for SIS v.1) available at Batch Operations on Channel Configuration Epochs
  • SEED - Standard for the Exchange of Earthquake Data. See SEED Manual (PDF)
    • Dataless SEED - Metadata that describes the data (i.e., everything but the data)
    • Full SEED - Dataless and Data together
    • Mini SEED - Data portion
  • Sensitivity - SIS considers individual response stages as sensitivity, and stage 0 response as gain. For how SIS calculates sensitivity and gain, see these formulas.
  • Sensitivity, Units of - When reporting values of North/South Component Sensitivity or East/West Component Sensitivity, abbreviate Volts/m/sec (V/M/S) or Volts per G(ravity) (V/G) as desired
  • Sensor Component Number - An abstract SIS concept. If you know the Vertical, N/S, and E/W component sensitivities, they can be automatically assigned as:
    • Vertical axis component -> used for SEED channel name with 'Z' orientation code
    • N/S axis component -> used for SEED channel name with 'N' orientation code
    • E/W axis component -> used for SEED channel name with 'E' orientation code
    Other networks may use Z/1/2 or 1/2/3 or some other local convention instead of Z/N/E, and will have to map their convention to SIS.
  • Signal Unit - Units of the input signal (which could be units of acceleration, velocity, temperature, etc.) To batch change the Signal Unit on various channels, use Batch Operations in Channel Manager; example tutorial (for SIS v.1) available at Batch Operations on Channel Configuration Epochs
  • Single-Ended Output - Output Voltage configuration. Can also refer to "peak amplitude," the maximum absolute value of the signal (abbreviated Vpk or Vp). See IRIS's web page, Kinemetrics Episensor Accelerometer Response, under "Voltage and Output Types."
  • Singe-Site - Installation where all seismic equipment resides at the same SIS site. The logger is configured using the single-site configuration. As compared to "multi-site" installations.
  • SIS - Station Information System, a repository for station metadata in the Southern California Seismic Network (SCSN). Consists of a database that stores information for the applications that use station metadata from the array, as well as a web interface for users to make changes to the metadata due to field work or quality control.
  • Site - In SIS v.1, refers to the physical site of a seismic station and is used to talk about permits or landowner issues. In SIS v.2, "Site" has replaced the word "Station," and refers to any collection point for equipment, whether seismic, telemetry, or GPS.
  • Site Description - A field (in SIS v.2) that allows more characters to better describe the locale represented by the Station Code. In SIS v.1, this was called Location Description, and for CI.BAR, this field read "Barrett, San Diego County." This information is only stored in SIS, as there is no place for it in the dataless or FDSN/Extended Station XML. This is not a required field and is not epoched.
  • Site Epoch Description - When data is migrated from SIS v.1 to SIS v.2, this field holds the old Location Description where people usually put some description of the nearest highway or county name. This is the Station Name (line 5, col 41-80) in the Cosmos V0 format.
  • Site Epoch Name - The long, more descriptive name for a station, e.g., Barrett is the Site Epoch Name for Station Code (CI.)BAR. The Site Epoch Name populates Blockette 50, Field 9 (Site Name field) in the dataless SEED. You can use the same Site Epoch Name over multiple Site Epochs.
  • Site Lookup Code - In SIS v2, this is a customizable site identifier comprised of 20 alphanumeric characters (period, hyphen, and underscore allowed) with no spaces, not restricted to the FDSN 5-character standard; will display in all caps. Typically this is your sta (station) code. Examples:
    • If you have a site CI.BAR that houses only seismic equipment, the lookup code could simply be "BAR"
    • If you have two sites at CI.RVR, one analog and one digital, you could designate that the analog site's lookup code be "RVR_ANALOG"
    • The Lookup Code is unique per network, e.g., CI.BAR could have lookup code "BAR" and BK.BAR could have lookup code "BAR".
    • The Lookup Code will not appear in the Station XML or Dataless SEED.
  • State of Health (SOH) Channel - In some loggers, may correspond to inputs on an auxiliary board for temperature, pressure, etc., but may not. These channels record data that tracks the relative healthiness or unhealthiness of various system components (such as logs, error messages, etc.).
  • Station - In SIS v.1, a seismic station. In SIS v.2, "Station" has been replaced by the term "Site" and can refer to any collection point for equipment, whether seismic, telemetry, or GPS.
  • Station Channel Numbers - Used to refer to particular sensor locations and orientations. They are like an abbreviated SCNL, but their use precedes SNCLs. They can be used to denote sensor locations on instrumentation schematics for structures.
    • Example: a structure with 24 sensors deployed. Initially there might be two data loggers, each with pins ranging from 1-12. The first recorder might be assigned station channels 1-12, and the second recorder assigned station channels 13-24. Subsequently a new 24-channel data logger is installed. sensors may be assigned to different pin outs (in the range 1-24), but the station channel number of each sensor does not change. Thus, regardless of the number and types of data loggers, the station channel numbers persist.
  • Station Code or stationcode - FDSN Station code consisting of letters/numbers that is the official designation in SIS of a particular seismic, GPS, or telemetry station. Maximum 5 characters.
  • Storage Format - Compression format of the data, e.g., Steim-2 compression. To batch change the Storage Format of various channels, use Batch Operations in Channel Manager; example tutorial (for SIS v.1) available at Batch Operations on Channel Configuration Epochs

T

  • Telemetry - Method of transferring data from stations to central database servers. SIS offers a List of Telemetry Types and a filterable Station Telemetry Type Report that details what telemetry type each station uses.
  • Templates - In SIS v.2, all equipment is added via the GUI by using pre-made templates that an RSN's Admin creates for end users. The templates enable admins to pre-fill certain form fields, making it easier and faster for end users such as field techs to complete and submit the forms. For more, see [wiki:SIS/UI/Tutorial-v2.0/Intro#SISConcepts5Templates SIS Concepts: Templates].
  • Tuning - As in, "Change the tuning of the VCO," refers to changing the frequency?/voltage? of the VCO.

U

  • Units of Sensitivity - When reporting values of North/South Component Sensitivity or East/West Component Sensitivity, abbreviate Volts/m/sec (V/M/S) or Volts per G(ravity) (V/G) as desired

V

  • VCO Pre-Amp[lifier] - A Voltage-Controlled Oscillator or VCO is an electronic oscillator whose frequency of oscillation is controlled by an input voltage. As applied to "analog" stations, the VCO converts the output voltage of a seismometer to an audio tone that can be telemetered via radio. At the receiving end, a discriminator digitizes the radio audio tone. In applications that require re-broadcast of the signal as analog, the output from the discriminator is fed into a second VCO, which converts the digital signal back to an audio tone for re-broadcast to a second discriminator.
  • Vertical Component Sensitivity - A component setting from an instrument's data sheet that allows refinement of results

W

  • wiki - a website that allows collaborative editing of its content and structure by its users

XYZ

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