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Last modified by robert on 2026/06/29 16:42
From version 115.1
edited by robert
on 2026/06/29 08:23
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To version 96.3
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on 2026/01/19 13:47
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1 -XWiki.robert
1 +XWiki.KB
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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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25 25  
26 26  The nodes must be programmed in the SoloLite software prior to use. The screenshots below show our recommended parameters for the 5 Hz (16HR-3C) and 5 second (BDC3-5) nodes.
27 27  
28 -[[IGU16HR-3C programming screen set at 250 Hz. Ensure circled areas are set!>>image:5Hz_node_programming.labels.png||alt="IGU-16 3C programming screen"]]
26 +[[IGU16HR-3C programming screen set at 250 Hz. Ensure circled areas are set!>>image:5Hz_node_programming.labels.png||alt="IGU-16 3C programming screen" data-xwiki-image-label="IGU-16 3C programming screen set at 250 Hz. Ensure that the circled areas are set!"]]
29 29  
30 -[[BD3C-5 programming screen set at 250 Hz. Ensure circled areas are set!>>image:5S_node_programming.labels.png||alt="BD3C-5 programming screen set at 250 hz. Ensure that the circled areas are set!"]]
28 +[[BD3C-5 programming screen set at 250 hz. Ensure circled areas are set!>>image:5S_node_programming.labels.png||alt="BD3C-5 programming screen set at 250 hz. Ensure that the circled areas are set!"]]
31 31  
32 32  
33 33  FIFO (first in, first out) data mode is safest as this will overwrite old data in case you forgot to clear the storage. At <= 250 hz you can fit 4++ months of data on these, shouldn't be an issue.
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71 71  
72 72  We have experienced interference from animals (foxes, dogs, goats) digging up and carrying nodes off for tens or hundreds of metres. It is helpful to minimise human and food smells (particularly on the rope handles) when working in areas where this is a risk. Or, wipe down affected nodes with 50-80% methylated spirits if extensive handling can not be avoided.
73 73  
74 -If you come to collect your node and it is missing~-~- LOOK FOR IT! It may not have gotten far. We have found dozens of nodes by spending 15 minutes looking for them.
75 -
76 -= External Power =
77 -
78 -Both the 5Hz IGU-16HR and 5s BD3C-5 can be optionally powered via external battery via either a replacement bottom half (the 5Hz nodes) or a battery cable accessory (BD3C-5) using standard lead acid batteries from 9-36v. We have done preliminary testing at 250 Hz with a 12v battery:
79 -
80 -- BD3C-5: ~~2 days of recording per 1 Ah
81 -
82 -- IGU16-HR 3C:  ~~3.5 days of recording per 1 Ah
83 -
84 -- IGU16-HR 1C: ~~7 days of recording per 1 Ah
85 -
86 -Of course, these can also be fit with a solar panel & charge controller which would then theoretically keep them going indefinitely (limited only by the disk storage, which at 250 Hz could be on the order of 12 months).
87 -
88 88  = **Installation** =
89 89  
90 90  (% class="box infomessage" %)
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111 111  
112 112  **Site Analysis**:
113 113  
114 -* **Take compass measurements away from the sensor as it will affect your measurement. Use a stick or shovel to help align.**
115 -* Take photographs from various angles to document the site setup thoroughly. Have a colleague stand next to it pointing at it.
116 -* Include a detailed site description in your notes.
98 +* **Take compass measurements away from the sensor as it will affect your measurement.**
99 +* Take photographs from various angles to document the site setup thoroughly.
100 +* Include a detailed site description in your notes
117 117  
118 118  == 3. GPS Considerations ==
119 119  
120 120  (% class="wikigeneratedid" %)
121 -The GPS antenna is at the top and center of the unit, and will (usually) only receive signal with a clear sky view directly above. The signal is able to penetrate plastic and terracotta planters and a thin (2 cm?) layer of soil, but may struggle if the soil layer is too thick. **These nodes will not start recording without attaining a GPS lock** and repeated attempts will excessively drain the battery.
105 +The GPS antenna is at the top and center of the unit, and will (usually) only receive signal with a clear sky view directly above. The signal is able to penetrate plastic and terracotta planters and a thin layer of soil, but may struggle if the soil layer is too thick. **These nodes will not start recording without attaining a GPS lock** and repeated attempts will excessively drain the battery.
122 122  
123 123  == 4. Visibility and Location Marking ==
124 124  
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126 126  
127 127  **GPS Marking**:
128 128  
129 -* Use a GPS device to mark the instrument's exact location. Most modern cell phones can get to about a 3m error with their internal GPS also; you can probably also get away with investing a few dollars in a good app that shows error and lets you log markers.
130 -* Also write the GPS down on paper (ie your [[LOG SHEET>>http://auspass.edu.au/field/NODES_blank_fieldlog.pdf]]).
113 +* Use a GPS device to mark the instrument's exact location.
114 +* Record this location in both your paper notes and the GPS device.
131 131  
132 132  == (% style="color:inherit; font-family:inherit; font-size:max(18px, min(20px, 14.4444px + 0.462963vw))" %)5. Charge Time, Pre-Deployment & Post-Deployment(%%) ==
133 133  
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324 324  
325 325  * Once a new project is created, the Data Transfer View panel will display connected nodes with details like series number and data size.
326 326  * If “Prospect not matched” appears, it simply means the new project doesn’t match the original programming project. This is not a concern.
327 -* Select all nodes and right-click to “force download”. This starts the download process.[[image:Smartsolo harvesting #4 copy.png]]
311 +* Select all nodes and right-click to “force download”. This starts the download process.
328 328  * Completed downloads will appear as new folders in the Downloaded Data panel.
329 329  )))
330 330  1. (((
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331 331  **Exporting Data in Readable Format**:
332 332  
333 333  * Go to the “Tool” menu and select “export seismic data”.
334 -* Tailor other parameters to project preference and ensure "Sample Interval" matches the setting used during node reset (note: the standard used by ANU is 4ms, or 250hz)
318 +* Tailor other parameters to personal preference and ensure "Sample Interval" matches the setting used during node reset.
319 +* Click “prepare” followed by “run” to start reformatting. Monitor this process in the small panel at the bottom left.
335 335  * (% class="box warningmessage" %)
336 336  (((
337 -**Ensure export data is set to "COUNTS" (int32), not "mV" (float). This is critical!**
322 +* **Ensure to export data as "COUNTS" (int32), not "mV" (float). This is critical!**
323 +
324 +* **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.**
338 338  )))
339 -* 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.
340 -* Set "Remove DC" to "Yes" to centre the data around the zero value
341 -* Set the correct Start Time (UTC) and End Time (UTC) of the project to prevent the unnecessary export of older data
342 -* [[image:Smartsolo harvesting #9 copy.png]]
343 -* Click “prepare” followed by “run” to start reformatting. Monitor this process in the small panel at the bottom left.
344 -* The data will be exported to the SOLODATA folder. For a windows system, the following file explorer page is where you must navigate to to locate your project folder[[image:Smartsolo harvesting #8 copy.png]]
345 345  )))
346 346  
347 347  == Smart Solo IGU-16HR Polarity Notice ==
348 348  
349 -See [[5Hz Node Polarity Issues>>https://auspass.edu.au/xwiki/bin/view/Data/AusPass%20Data/#HSmartSoloNodePolarityIssues]] for discussion. If data is headed to AusPass, we prefer to invert the IGU-16HR channel data manually rather than in the SoloLite software or inverting the response metadata.
330 +See [[https:~~/~~/auspass.edu.au/xwiki/bin/view/Data/AusPass%20Data/#HSmartSoloNodeZPolaritybug>>https://auspass.edu.au/xwiki/bin/view/Data/AusPass%20Data/#HSmartSoloNodeZPolaritybug]] for discussion. If data is headed to AusPass, we prefer to invert the IGU-16HR channel data manually rather than in the SoloLite software or inverting the response metadata.
350 350  
351 -**The BD3C-5 data does not require any sort of polarity inversion.**
332 +**The BD3C-5 data does not require a polarity inversion.**
352 352  
353 353  == 18 Leap Second bug ==
354 354  
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408 408  **Finalizing the Download**:
409 409  
410 410  * After downloading, mark the //"D"// box on your temporary labels to indicate completion.
392 +
393 +
411 411  )))
412 412  
396 +[[image:1706153266647-145.png||data-xwiki-image-style-alignment="center" height="340" width="603"]]
413 413  
414 414  
415 415  
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430 430  
431 431  ----
432 432  
433 -= Instrument Response =
434 -
435 -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]]
436 -
437 -(% class="wikigeneratedid" %)
438 -//A small note on the y-axis scale of the following plots: We are aware that raw velocity is typically scaled ~~1e-6. This data has been filtered and selected for especially quiet regions so has lower amplitude. The key point is showing the match with the known CMG-6TD and Centaur data.//
439 -
440 -== IGU 16HR-3C ==
441 -
442 - '16HR3C': {'poles':[(-22.211059+22.217768j), (-22.211059-22.217768j)],
443 - 'zeros':[0j, 0j],
444 - 'gain':1,
445 - 'sensitivity': 257019225.55108312}
446 -
447 -[[X axis is samples (.01 s), Y axis is velocity (m/s), 0.5-5 Hz filter>>image:IGU16_Z_huddle.png]]
448 -
449 -[[X axis is samples (.01 s), Y axis is velocity (m/s), 0.5-5 Hz bandpass filter>>image:IGU16_N_huddle.png]]
450 -
451 -== IGU 16-1C ==
452 -
453 -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.
454 -
455 -[[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]]
456 -
457 -== BD3C-5 ==
458 -
459 - 'BD3C': {'poles':[(-1720.4+0j), (-1.2+0.9j), (-1.2-0.9j)],
460 - 'zeros':[(14164+0j), (-7162+0j), 0j, 0j],
461 - 'gain':1.69726e-05,
462 - 'sensitivity': 702651512.6046528}
463 -
464 -Above 0.5 Hz, the BD3C-5 response fits well:
465 -
466 -[[X axis is samples (.01 s), Y axis is velocity (m/s), 0.5-5 Hz filter>>image:BD3C_Z_huddle.0.5.png]]
467 -
468 -[[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]]
469 -
470 -(% class="wikigeneratedid" %)
471 -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:
472 -
473 -
474 -[[BD3C **0.1 **to 5 Hz bandpass filter>>image:BD3C_Z_huddle.0.1.png]]
475 -
476 -[[BD3C **0.1** to 5 Hz bandpass filter>>image:BD3C_N_huddle.0.1.png]]
477 -
478 -== IGU-16 Horizontal noise & how to avoid ==
479 -
480 -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.
481 -
482 -[[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]]
483 -
484 -(% class="wikigeneratedid" %)
485 -The BD3C-5 nodes do not have this issue:
486 -
487 -[[BD3C-5 test, as above. There is no additional noise on the horizontal channels.>>image:BD3C_psd.png]]
488 -
489 489  = **Cleaning** =
490 490  
491 -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.
419 +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.
492 492  
493 493  = **Weights (for shipping)** =
494 494  
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588 588  |**Dimensions (LxHxW)**|558 x 357 x 300mm
589 589  |**Input rating**|100-210V - 50/60Hz
590 590  |**Power**|1000W
591 -|**Weight**|14.5 kg
592 -|**Weight with cables**|21 kg
519 +|**Weight**|14.5kg
520 +|**Weight with cables**|21kg
593 593  )))
594 594  
595 595  (% class="box" id="HSmartSoloBD3C-16PortableBatteryCharger" %)
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601 601  |**Dimensions (LxHxW)**|625 x 500 x 366mm
602 602  |**Input rating**|100-210V - 50/60Hz
603 603  |**Power**|100W
604 -|**Weight**|21.5 - 24 kg
605 -|**Capacity**|16 nodes
532 +|**Weight**|21.5 - 24kg
533 +|**Slots no.**|16
606 606  |**Download Speed**|20MB/sec/slot
607 607  )))
608 608  
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612 612  
613 613  [[image:20250729_124644.jpg]]
614 614  
615 -|**Dimensions (LxHxW)**|625 x 500 x 366 mm
616 -|**Input rating**|100-210V - 50/60 Hz
617 -|**Power**|640 W
618 -|**Weight**|26.3 kg
619 -|**Capacity**|16 nodes
543 +|**Dimensions (LxHxW)**|625 x 500 x 366mm
544 +|**Input rating**|100-210V - 50/60Hz
545 +|**Power**|640W
546 +|**Weight**|26.3kg
547 +|**Slots no.**|16
620 620  )))
621 621  
622 622  (% class="box" %)
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626 626  [[image:20250729_124957.jpg]]
627 627  
628 628  
629 -|**Dimensions (LxHxW)**|590 x 225 x 405 mm
630 -|**Weight**|8.2 kg
631 -|**Capacity**|6 nodes
557 +|**Dimensions (LxHxW)**|590 x 225 x 405mm
558 +|**Weight**|8.2kg
559 +|**Slots no.**|6
632 632  )))
633 633  
634 634  (% class="box" %)
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638 638  [[image:20250729_124502.jpg]]
639 639  
640 640  |**Dimensions (LxHxW)**|230 x 340 x 310mm
641 -|**Weight**|(((
642 -3.6kg (empty)
643 -
644 -18.0kg (full)
569 +|**Weight**|3.6kg
570 +|**Slots no.**|6
645 645  )))
646 -|**Capacity**|6 nodes
647 -)))
648 648  
649 649  (% class="box" %)
650 650  (((
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654 654  
655 655  |**Dimensions (LxHxW)**|225 x 200 x 550mm
656 656  |**Weight**|
657 -|**Capacity**|8 nodes
581 +|**Slots no.**|6
658 658  )))
659 659  )))
660 660  )))
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