Instrument Responses Schema v1.0.
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1.- Station information :
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Station_Data (network, station, start_date)

	network			char(2)		Network code
	station			char(5)		Station call letters
	latitude		float		Latitude (degrees)
	longitude		float		Longitude (degrees)
	elevation		float		Elevation (m)
	site_name		char(60)	Site name
	net_id			int		Network identifier code
	word_32			int		32 bit word order
	word_16			int		16 bit word order
	start_date		date		Start effective date
	end_date		date		End effective date
	net_code		char(2)		Network code (V2.3)


Station_Comment (network, station, start_date, comment_id)

	network			char(2)		Network code
	station			char(5)		Station call letters
	start_date		date		Start effective date
	end_date		date		End effective date
	comment_id		int		Comment code key
	comment_level		int		Comment level


2.- Channel information :
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Channel_Data (network, station, channel, location, start_date)

	network			char(2)		Network code
	station			char(5)		Station call letters
	location		char(2)		Location
	channel			char(3)		Channel
	instrument_id		int		Instrument identifier
	comment			char(30)	Optional comment
	unit_signal		int		Units of signal responses
	unit_calib		int		Units of calibration input
	latitude		float		Latitude (degrees)
	longitude		float		Longitude (degrees)
	elevation		float		Elevation (m)
	local_depth		float		Local depth (m)
	azimuth			float		Azimuth (degrees)
	dip			float		Dip (degrees)
	format_id		int		Data format identifier code
	record_length		int		Data record length
	sample_rate		float		Sample rate (Hz)
	clock_drift		float		Max clock drift (seconds)
	flags			char(27)	Channel flags
	start_date		date		Start effective date
	end_date		date		End effective date


Channel_Comment (network, station, channel, location, start_date, comment_id)

	network			char(2)		Network code
	station			char(5)		Station call letters
	location		char(2)		Location
	channel			char(3)		Channel
	start_date		date		Start effective date
	end_date		date		End effective date
	comment_id		int		Comment code key
	comment_level		int		Comment level


3.- Response (Coefficients) information :
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Coefficients (network, station, channel, location, start_date, stage_seq)

	network			char(2)		Network code
	station			char(5)		Station call letters
	location		char(2)		Location
	channel			char(3)		Channel
	start_date		date		Start effective date
	end_date		date		End effective date
	stage_seq		int		Stage sequence number
	dc_key			int		Response (Coefficients) key


DC (key)

	key			int		Response (Coefficients) key
	unit_in			int		Signal input units
	unit_out		int		Signal output units


DC_Data (key, row_key)

	key			int		Response (Coefficients) key
	row_key			int		Row key
	r_type			char(1)		Response type
	coefficient		float		Numerator/Denominator coefficient
	error			float		Numerator/Denominator error


4.- Decimation information :
----------------------------

Decimation (network, station, channel, location, start_date, stage_seq)

	network			char(2)		Network code
	station			char(5)		Station call letters
	location		char(2)		Location
	channel			char(3)		Channel
	start_date		date		Start effective date
	end_date		date		End effective date
	stage_seq		int		Stage sequence number
	dm_key			int		Decimation key


DM (key)

	key			int		Decimation key
	sample_rate		float		Input sample rate (Hz)
	factor			int		Decimation factor
	offset			int		Decimation offset
	delay			float		Estimated delay (seconds)
	correction		float		Correction applied (seconds)


5.- Poles & Zeros information :
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Poles_Zeros (network, station, channel, location, start_date, stage_seq)

	network			char(2)		Network code
	station			char(5)		Station call letters
	location		char(2)		Location
	channel			char(3)		Channel
	start_date		date		Start effective date
	end_date		date		End effective date
	stage_seq		int		Stage sequence number
	pz_key			int		Poles & Zeros key


PZ (key)

	key			int		Poles & Zeros key
	tf_type			char(1)		Transfer function type
	unit_in			int		Stage signal input units
	unit_out		int		Stage signal output units
	AO			float		AO normalization factor (1.0 if none)
	AF			float		Normalization frequency Fn (Hz)


PZ_Data (key, row_key)

	key			int		Poles & Zeros key
	row_key			int		Row key
	r_value			float		Real zero/pole
	r_error			float		Real zero/pole error
	i_value			float		Imaginary zero/pole
	i_error			float		Imaginary zero/pole error


6.- Sensitivity information :
-----------------------------

Sensitivity (network, station, channel, location, start_date, stage_seq)

	network			char(2)		Network code
	station			char(5)		Station call letters
	location		char(2)		Location
	channel			char(3)		Channel
	start_date		date		Start effective date
	end_date		date		End effective date
	stage_seq		int		Stage sequence number
	sv_key			int		Sensitivity key


SV (key)

	key			int		Sensitivity key
	sensitivity		float		Sensitivity/gain (Sd)
	frequency		float		Frequency (Hz) (Fs)


SV_Data (key, row_key)

	key			int		Sensitivity key
	row_key			int		Row key
	sensitivity		float		Sensitivity for calibration
	frequency		float		Frequency of calibration (Hz)
	time_calib		date		Time of above calibration


7.- Data dictionary :
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Abbreviation (id)

	id			int		Abbreviation lookup code
	description		char(50)	Abbreviation description


Unit (id)

	id			int		Unit lookup code
	name			char(20)	Unit name
	description		char(51)	Unit description


Comment (id)

	id			int		Comment code key
	class			char(1)		Comment class code
	description		char(70)	Description of comment
	unit			int		Units of comment level


Format (id)

	id			int		Data format identifier code
	name			char(50)	Short descriptive name
	family			int		Data family type


Format_Data (id, row_id)

	id			int		Data format identifier code
	row_id			int		Row identifier
	key			char(80)	Decoder key