Station_Sensor

Logical Entity Name | Station_Sensor
Default Table Name | Station_Sensor
Definition | Data associating a station with a sensor

Station_Sensor Attributes

Attribute/Logical Rolename | Domain | Datatype | NULL | Definition
sta |  | VARCHAR(6) | NO | Station code. This is the common code-name of a seismic observatory. Generally only three or four characters are used
net |  | VARCHAR(8) | NO | Unique network identifier. This character string is the name of a seismic network
sensor_nb |  | NUMERIC(8, 0) | NO | This attribute represents the sensor number
ondate |  | DATE | NO | This attribute denotes the start date
sensor_id |  | NUMERIC(8, 0) | NO | Sensor identifier. Each sensor is assigned a unique integer which identifies it in a database
lat |  | FLOAT | YES | Latitude. This attribute is the geographic latitude. Locations north of the equator have positive latitudes
lon |  | FLOAT | YES | Longitude. This attribute is the geographic longitude. Longitudes are measured positive east of the Greenwich meridian
elev |  | FLOAT | YES | Elevation. This attribute is the elevation of a seismic station relative to mean sea level
edepth |  | FLOAT | YES | Emplacement depth. This attribute gives the depth at which the instrument is positioned, relative to the value of elev
nb_component |  | NUMERIC(8, 0) | NO | This attribute denotes the number of components of a sensor
datumhor |  | VARCHAR(8) | YES | Datum type for horizontal (latitude and longitude) coordinates
datumver |  | VARCHAR(8) | YES | Datum type for depth or elevation
offdate |  | DATE | YES | This attribute denotes the end date
lddate |  | DATE | YES | Load date. Date and time that the record was created or last modified, in Oracle date datatype

Station_Sensor Keys

Key Name | Key Type | Keys
StSe00 | PrimaryKey | sta, net, sensor_nb, ondate

Station_Sensor Relationships

Parent Relationships:

Entity Name | Type | Cardinality | Business Name | VerbPhrase | InversePhrase | Foreign Keys | Is Supertype
Sensor | Non-Identifying | One To Zero or More |  |  |  | sensor_id | NO
Station | Identifying | One To Zero or More |  |  |  | sta, net, ondate | NO

Child Relationships:

Entity Name | Type | Cardinality | Business Name | VerbPhrase | InversePhrase | Foreign Keys | Is Subtype
Station_Sensor_Component | Identifying | One To Zero or More |  |  |  |  | NO

Station_Sensor Check Constraints

Check Constraint Name | CheckConstraint
StSe01 | datumhor IN ('NAD27','WGS84')
StSe02 | datumver IN ('NAD27','WGS84','AVERAGE')
StSe03 | edepth >= 0.0
StSe04 | elev >= -5000.0 AND elev <= 5000.0
StSe05 | lat >= -90.0 AND lat <= 90.0
StSe06 | lon >= -180.0 AND lon <= 180.0
StSe07 | nb_component >= 0
StSe08 | sensor_nb >= 1