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Last modified by robert on 2026/06/29 16:42
From version 110.1
edited by Jack Dent
on 2026/06/15 09:18
Change comment: There is no comment for this version
To version 101.1
edited by robert
on 2026/02/13 22:03
Change comment: There is no comment for this version

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1 -XWiki.JackD
1 +XWiki.robert
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6 6  
7 7  ANSIR supply two types of three-channel nodes, and one type of one-channel node:
8 8  
9 -* **SmartSolo IGU-16HR 3C (5 Hz, 'very' short period)**
9 +* **SmartSolo IGU 16HR 3C (5 Hz, 'very' short period)**
10 10  * **SmartSolo BD3C-5 (5 second, short period)**
11 -* **SmartSolo IGU-16 1C (5 Hz, 'very' short period, single channel. Not 'HR')**
11 +* **SmartSolo IGU 16 1C (5 Hz, 'very' short period, single channel)**
12 12  
13 -Visit the [[SmartSolo page>>https://smartsolo.com/igu.html]] for more detail.
14 -
15 15  The three-channel nodes have a theoretical battery capacity of ~~30 days, whereas the single-channel type has a capacity of ~~50 days. The programming, operation and downloading procedures for all types of SmartSolo nodes are also similar.
16 16  
17 17  (% class="box infomessage" %)
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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.[[image:Smartsolo harvesting #4 copy.png]]
313 +* Select all nodes and right-click to “force download”. This starts the download process.
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 project preference and ensure "Sample Interval" matches the setting used during node reset.
320 +* Tailor other parameters to personal 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 -
333 333  )))
334 334  )))
335 335  
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397 397  **Finalizing the Download**:
398 398  
399 399  * After downloading, mark the //"D"// box on your temporary labels to indicate completion.
394 +
395 +
400 400  )))
401 401  
398 +[[image:1706153266647-145.png||data-xwiki-image-style-alignment="center" height="340" width="603"]]
402 402  
403 403  
404 404  
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419 419  
420 420  ----
421 421  
422 -= Instrument Response =
423 -
424 -We are aware that there are various different published responses for these instruments and trust very few of them. One has to be careful with how polarity is handled between groups as well, and if one is working in integer counts (the ANSIR default) or mV (unclear why anyone would use this as it makes file sizes enormous). The response information published below is in **counts** and seems to fit well in huddle tests. Note that the response is the same for all channels and all units (e.g. there are no bespoke calibrations!), all appear to be sample rate insensitive, and the IGU data has been inverted (multiplied by -1) as described here: [[5Hz Node Polarity Issues>>https://auspass.edu.au/xwiki/bin/view/Data/AusPass%20Data/#HSmartSoloNodePolarityIssues]]
425 -
426 -== IGU 16HR-3C ==
427 -
428 - '16HR3C': {'poles':[(-22.211059+22.217768j), (-22.211059-22.217768j)],
429 - 'zeros':[0j, 0j],
430 - 'gain':1,
431 - 'sensitivity': 257019225.55108312}
432 -
433 -[[X axis is samples (.01 s), Y axis is velocity (m/s), 0.5-5 Hz filter>>image:IGU16_Z_huddle.png]]
434 -
435 -[[X axis is samples (.01 s), Y axis is velocity (m/s), 0.5-5 Hz bandpass filter>>image:IGU16_N_huddle.png]]
436 -
437 -== IGU 16-1C ==
438 -
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.
440 -
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 -
443 -== BD3C-5 ==
444 -
445 - 'BD3C': {'poles':[(-1720.4+0j), (-1.2+0.9j), (-1.2-0.9j)],
446 - 'zeros':[(14164+0j), (-7162+0j), 0j, 0j],
447 - 'gain':1.69726e-05,
448 - 'sensitivity': 702651512.6046528}
449 -
450 -Above 0.5 Hz, the BD3C-5 response fits well:
451 -
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]]
453 -
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]]
455 -
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:
458 -
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 -
475 475  = **Cleaning** =
476 476  
477 -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.
421 +When assembled, the nodes are water resistant but not submersible. They can handle a good spray and wipe-down. A strong, non-wire brush is helpful to reach areas between the metal spikes on the bottom.
478 478  
479 479  = **Weights (for shipping)** =
480 480  
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