Response files

Dear everybody,

I want to create response files using ObsPy. I have all the parameters I need (normalization factor, sensitivity, damping, natural frequency, poles, zeros). Is there any way to write response files with ObsPy using this parameters?

Thanks in advance and best regards,

Florian Fuchs

Hello from Panama,
The resp in seisan is a nice tool for generating sac pz and gsc formatted responce files. What files do you need in the end? sac pz? gsc? resp? data list?
Cheers
Branden

gse*
If your sensors are commercial grade you can easily generate resp and dataless formatted response files using IRIS’s tool PDCC.
Gempa also has a new webbased tool called SMP.
Branden, OSOP

Making resp files from raw numbers is difficult but not impossible. I m currently driving and will send your more info latter tonight.
Branden, OSOP

Thanks a lot for your help!

Flores:

Hello from Panama City.

I would have liked to have sent you this earlier but was rushing across Panama for a conference in Panama City.

So here we go,

HOW TO MAKE A RESP FILE FROM RAW VALUES:

(Hint: If you have a commercial-grade sensor, the simplest way is to use either a) IRIS’s PDCC Java tool or b) gempa’s SMP web-based tool to generate a dataless seed volume and then IRIS’s rdseed program to generate RESP files: ./rdseed -R -f ) Links to download/ use all of these tools can be obtained via Google.

OPTION A:

if your input specs/files are:

2				seismometer period (seconds)
400 				generator constant (V/m/s)*
0.7				damping ratio
-3				amplifier gain (dB)
4.19E+06  			recording gain (c/V)
25.0 1				filter (Hz) # of poles

Then the SEISAN resp program will output the following GSE file:

CAL2 TEST  EHZ               0.97E-01      1.  100.00000 2012/11/01 00:00                       
PAZ2  1 V  0.62831852E-04                 3   3 Laplace transform                               
 -0.21991148E+01  0.22435460E+01
 -0.21991148E+01 -0.22435460E+01
 -0.15707964E+03 -0.13732338E-04
  0.00000000E+00  0.00000000E+00
  0.00000000E+00  0.00000000E+00
  0.00000000E+00  0.00000000E+00
DIG2  2  0.41900000E+07   100.00000

Which will need to be modified to:

CAL2 TEST  EHZ               0.97E-01      1.  100.00000 2012/11/01 00:00                       
PAZ2  1 V  0.62831852E-04                 3   2 Laplace transform                               
 -0.21991148E+01  0.22435460E+01
 -0.21991148E+01 -0.22435460E+01
 -0.15707964E+03  0.00000000E+00
  0.00000000E+00  0.00000000E+00
  0.00000000E+00  0.00000000E+00
DIG2  2  0.41900000E+07   100.00000

(Note: Removing the zero changes the response from displacement to velocity.)

The RESP file should then look like:

#		<< IRIS SEED Reader, Release 5.2 >>