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Last modified by robert on 2026/06/29 16:42
From version 105.2
edited by robert
on 2026/02/17 12:43
Change comment: There is no comment for this version
To version 110.1
edited by Jack Dent
on 2026/06/15 09:18
Change comment: There is no comment for this version

Summary

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1 -XWiki.robert
1 +XWiki.JackD
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312 312  
313 313  * Once a new project is created, the Data Transfer View panel will display connected nodes with details like series number and data size.
314 314  * If “Prospect not matched” appears, it simply means the new project doesn’t match the original programming project. This is not a concern.
315 -* Select all nodes and right-click to “force download”. This starts the download process.
315 +* Select all nodes and right-click to “force download”. This starts the download process.[[image:Smartsolo harvesting #4 copy.png]]
316 316  * Completed downloads will appear as new folders in the Downloaded Data panel.
317 317  )))
318 318  1. (((
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319 319  **Exporting Data in Readable Format**:
320 320  
321 321  * Go to the “Tool” menu and select “export seismic data”.
322 -* Tailor other parameters to personal preference and ensure "Sample Interval" matches the setting used during node reset.
322 +* Tailor other parameters to project preference and ensure "Sample Interval" matches the setting used during node reset.
323 323  * Click “prepare” followed by “run” to start reformatting. Monitor this process in the small panel at the bottom left.
324 324  * (% class="box warningmessage" %)
325 325  (((
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326 326  * **Ensure to export data as "COUNTS" (int32), not "mV" (float). This is critical!**
327 327  
328 328  * **Set "Remove Gain" to the same decibel gain as during programming. By default ANU sets this to 24db for short period nodes (a scaling factor of 15.848932), and 6db (a factor of 2.0) for broadband nodes.**
329 +* **Set 'Remove DC' to 'Yes' to centre the data around the zero value**
330 +* **Set the correct Start Time (UTC) and End Time (UTC) of the project to prevent the unnecessary export of old data**
331 +
332 +
329 329  )))
330 330  )))
331 331  
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393 393  **Finalizing the Download**:
394 394  
395 395  * After downloading, mark the //"D"// box on your temporary labels to indicate completion.
396 -
397 -
398 398  )))
399 399  
400 -[[image:1706153266647-145.png||data-xwiki-image-style-alignment="center" height="340" width="603"]]
401 401  
402 402  
403 403  
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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]]
435 +[[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 -The 1C nodes seem to have a slightly different response to the 3C (TBA)
439 +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  
441 +[[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]]
442 +
440 440  == BD3C-5 ==
441 441  
442 442   'BD3C': {'poles':[(-1720.4+0j), (-1.2+0.9j), (-1.2-0.9j)],
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444 444   'gain':1.69726e-05,
445 445   'sensitivity': 702651512.6046528}
446 446  
447 -*image TBA but they have been created in the past~-~- we are 100% confident our published responses are correct
450 +Above 0.5 Hz, the BD3C-5 response fits well:
448 448  
449 -== Horizontal noise & how to avoid ==
452 +[[X axis is samples (.01 s), Y axis is velocity (m/s), 0.5-5 Hz filter>>image:BD3C_Z_huddle.0.5.png]]
450 450  
451 -The 5 Hz nodes are susceptible to horizontal noise due to the placement of geophones in the units, **but this can be mitigated by completely burying the units flush with the ground.** In the below example, the node was set on the floor of our basement set on its plastic carrying case support. As such the amount of horizontal noise noticeably increases above ~~ 10Hz.
454 +[[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]]
452 452  
453 -[[Power spectrum huddle test vs a CMG-6TD (S1) and TC120/Centaur combo. The N and E channels have excess noise above 10Hz due to "sticking up" out of the ground.>>image:IGU16_spectrum.png]]
456 +(% class="wikigeneratedid" %)
457 +Below the corner frequency (0.2 Hz) the phase response still fares well, but amplitude response may need to be dialed in a bit (it seems a bit high). In the next two figures the filter is **0.1** to 5 Hz:
454 454  
459 +
460 +[[BD3C **0.1 **to 5 Hz bandpass filter>>image:BD3C_Z_huddle.0.1.png]]
461 +
462 +[[BD3C **0.1** to 5 Hz bandpass filter>>image:BD3C_N_huddle.0.1.png]]
463 +
464 +== IGU-16 Horizontal noise & how to avoid ==
465 +
466 +The** 5 Hz nodes** are susceptible to horizontal noise due to the placement of geophones in the units, **but this can be mitigated by completely burying the units flush with the ground.** In the below example, the node was set on the floor of our basement set on its plastic carrying case support. As such the amount of horizontal noise noticeably increases above ~~ 10Hz.
467 +
468 +[[IGU-16HR-3C Power spectrum huddle test vs a CMG-6TD (S1) and TC120/Centaur combo. The N and E channels have excess noise above 10Hz due to "sticking up" out of the ground.>>image:IGU16_spectrum.png]]
469 +
470 +(% class="wikigeneratedid" %)
471 +The BD3C-5 nodes do not have this issue:
472 +
473 +[[BD3C-5 test, as above. There is no additional noise on the horizontal channels.>>image:BD3C_psd.png]]
474 +
455 455  = **Cleaning** =
456 456  
457 457  When assembled, the nodes are water resistant but not submersible. They can handle a good spray and wipe-down. A stiff plastic brush is helpful to reach areas between the metal spikes on the bottom.
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