mecdataid 
Base Object  mecchannel 
Attribute Name  mecdataid 
ColumnName  mecdataid 
Logical Rolename   
RoleName   
Definition  Mechanisn data identifier 
Note 
Range:		mecdataid > 0
 

net 
Base Object  mecchannel 
Attribute Name  net 
ColumnName  net 
Logical Rolename   
RoleName   
Definition  Unique network identifier. This character string is the name of a seismic network 
Note 
Range:             Any free-format string up to 8 characters. If available, use the two character FDSN code for the network
 

sta 
Base Object  mecchannel 
Attribute Name  sta 
ColumnName  sta 
Logical Rolename   
RoleName   
Definition  Station code. This is the common code-name of a seismic observatory. Generally only three or four characters are used 
Note 
Range:             Any free-format string up to 6 characters
 

seedchan 
Base Object  mecchannel 
Attribute Name  seedchan 
ColumnName  seedchan 
Logical Rolename   
RoleName   
Definition  SEED channel name. The first character denotes the band code, the second for the instrument code and the third represents the component code 
Note 
Range:		seedchan = {E | S | H | B | M | L | V | U | R} U
		                   {A | B | D | F | G | H | I | K | L | M | P | R | S | V | T | W} U
		                   {Z | N | E | A | B | C | T | R | 1 | 2 | 3 | U | V | W}
		Band code:
						Sample rate (Hz)	Corner period (sec)
		E = extremely short period		³ 80			< 10
		S = short period			³ 10 to < 80		< 10
		H = high broad band		³ 80			³ 10
		B = broad band			³ 10 to < 80		³ 10
		M = mid period			> 1 to < 10
		L = long period			~ 1
		V = very long period			~ 0.1
		U = ultra long period			~ 0.01
		R = extremely long period		~ 0.001

		Instrument code:
		A = tiltmeter			B = creepmeter
		D = pressure			F = magnetometer
		G = gravimeter/accelerometer		H = high gain seismometer			
		I = humidity			K = temperature
		L = low gain seismometer		M = mass position seismometer
		P = geophone			R = rainfall
		S = linear strainmeter		V = volumetric strain
		T = tide meter			W = wind

		Component code:
		N = north-south		E = east-west
		T = transverse		R = radial
		Z = vertical
		A, B, C = triaxial
		1, 2, 3 = orthogonal components but non-traditional orientations
		U, V, W = optional components
 

location 
Base Object  mecchannel 
Attribute Name  location 
ColumnName  location 
Logical Rolename   
RoleName   
Definition  Describes the individual sites on an array station, operated by the same network operator 
Note 
Range:             Any free-format string up to 2 characters long