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Last modified by robert on 2026/02/27 19:58
From version 107.1
edited by robert
on 2026/02/17 16:28
Change comment: There is no comment for this version
To version 108.1
edited by robert
on 2026/02/18 14:46
Change comment: There is no comment for this version

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431 431  
432 432  [[X axis is samples (.01 s), Y axis is velocity (m/s), 0.5-5 Hz filter>>image:IGU16_Z_huddle.png]]
433 433  
434 -[[X axis is samples (.01 s), Y axis is velocity (m/s), 0.5-5 Hz filter>>image:IGU16_N_huddle.png]]
434 +[[X axis is samples (.01 s), Y axis is velocity (m/s), 0.5-5 Hz bandpass filter>>image:IGU16_N_huddle.png]]
435 435  
436 436  == IGU 16-1C ==
437 437  
438 438  The 1C nodes seem to have the same response as the 3-channel IGU-16HR-3C (above), however the response posted at IRIS-NRL seems to imply that there is no poles and zeros information (e.g. a flat/linear response). This is 100% not so.
439 439  
440 -[[IGU-16 1C, X axis is samples (.01 s), Y axis is velocity (m/s), 0.5-5 Hz filter. Seems to be same response as IGU-16HR-3C.>>image:IGU16_1C_Z_huddle.png]]
440 +[[IGU-16 1C, X axis is samples (.01 s), Y axis is velocity (m/s), 0.5-5 Hz bandpass filter. Seems to be same response as IGU-16HR-3C.>>image:IGU16_1C_Z_huddle.png]]
441 441  
442 442  == BD3C-5 ==
443 443  
... ... @@ -446,17 +446,19 @@
446 446   'gain':1.69726e-05,
447 447   'sensitivity': 702651512.6046528}
448 448  
449 -[[X axis is samples (.01 s), Y axis is velocity (m/s), 0.5-5 Hz filter>>image:BD3C_Z_huddle.png]]
449 +Above 0.5 Hz, the BD3C-5 response fits well:
450 450  
451 -[[X axis is samples (.01 s), Y axis is velocity (m/s), 0.5-5 Hz filter>>image:BD3C_N_huddle.png]]
451 +[[X axis is samples (.01 s), Y axis is velocity (m/s), 0.5-5 Hz filter>>image:BD3C_Z_huddle.0.5.png]]
452 452  
453 +[[X axis is samples (.01 s), Y axis is velocity (m/s), 0.5-5 Hz bandpass filter>>image:BD3C_N_huddle.0.5.png]]
454 +
453 453  (% class="wikigeneratedid" %)
454 -Below the corner frequency 0.2 Hz (i.e. 5 seconds) the response still does a good job, but may need to be dialed in a bit. We are looking into this.
456 +Below the corner frequency 0.2 Hz (5 seconds) the response still does a good job, but may need to be dialed in a bit. In the next two figures the filter is 0.1 to 5 Hz. We are looking into this..
455 455  
456 456  
457 -[[BD3C 0.1 to 5 Hz bandpass>>image:BD3C_Z_huddle.0.1.png]]
459 +[[BD3C **0.1 **to 5 Hz bandpass filter>>image:BD3C_Z_huddle.0.1.png]]
458 458  
459 -[[BD3C 0.1 to 5 Hz bandpass>>image:BD3C_N_huddle.0.1.png]]
461 +[[BD3C **0.1** to 5 Hz bandpass filter>>image:BD3C_N_huddle.0.1.png]]
460 460  
461 461  == IGU-16 Horizontal noise & how to avoid ==
462 462  
BD3C_N_huddle.0.5.png
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BD3C_Z_huddle.0.5.png
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