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Last modified by robert on 2026/06/29 16:42
From version 112.1
edited by robert
on 2026/06/17 16:54
Change comment: There is no comment for this version
To version 106.1
edited by robert
on 2026/02/17 16:18
Change comment: There is no comment for this version

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73 73  
74 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 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 86  = **Installation** =
87 87  
88 88  (% class="box infomessage" %)
... ... @@ -109,14 +109,14 @@
109 109  
110 110  **Site Analysis**:
111 111  
112 -* **Take compass measurements away from the sensor as it will affect your measurement. Use a stick or shovel to help align.**
113 -* Take photographs from various angles to document the site setup thoroughly. Have a colleague stand next to it pointing at it.
114 -* Include a detailed site description in your notes.
102 +* **Take compass measurements away from the sensor as it will affect your measurement.**
103 +* Take photographs from various angles to document the site setup thoroughly.
104 +* Include a detailed site description in your notes
115 115  
116 116  == 3. GPS Considerations ==
117 117  
118 118  (% class="wikigeneratedid" %)
119 -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.
109 +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.
120 120  
121 121  == 4. Visibility and Location Marking ==
122 122  
... ... @@ -124,8 +124,8 @@
124 124  
125 125  **GPS Marking**:
126 126  
127 -* 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.
128 -* Also write the GPS down on paper (ie your [[LOG SHEET>>http://auspass.edu.au/field/NODES_blank_fieldlog.pdf]]).
117 +* Use a GPS device to mark the instrument's exact location.
118 +* Record this location in both your paper notes and the GPS device.
129 129  
130 130  == (% style="color:inherit; font-family:inherit; font-size:max(18px, min(20px, 14.4444px + 0.462963vw))" %)5. Charge Time, Pre-Deployment & Post-Deployment(%%) ==
131 131  
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322 322  
323 323  * Once a new project is created, the Data Transfer View panel will display connected nodes with details like series number and data size.
324 324  * If “Prospect not matched” appears, it simply means the new project doesn’t match the original programming project. This is not a concern.
325 -* Select all nodes and right-click to “force download”. This starts the download process.[[image:Smartsolo harvesting #4 copy.png]]
315 +* Select all nodes and right-click to “force download”. This starts the download process.
326 326  * Completed downloads will appear as new folders in the Downloaded Data panel.
327 327  )))
328 328  1. (((
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329 329  **Exporting Data in Readable Format**:
330 330  
331 331  * Go to the “Tool” menu and select “export seismic data”.
332 -* 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)
322 +* Tailor other parameters to personal preference and ensure "Sample Interval" matches the setting used during node reset.
323 +* Click “prepare” followed by “run” to start reformatting. Monitor this process in the small panel at the bottom left.
333 333  * (% class="box warningmessage" %)
334 334  (((
335 -**Ensure export data is set to "COUNTS" (int32), not "mV" (float). This is critical!**
326 +* **Ensure to export data as "COUNTS" (int32), not "mV" (float). This is critical!**
327 +
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.**
336 336  )))
337 -* 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 -* Set "Remove DC" to "Yes" to centre the data around the zero value
339 -* Set the correct Start Time (UTC) and End Time (UTC) of the project to prevent the unnecessary export of older data
340 -* [[image:Smartsolo harvesting #9 copy.png]]
341 -* Click “prepare” followed by “run” to start reformatting. Monitor this process in the small panel at the bottom left.
342 -* 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]]
343 343  )))
344 344  
345 345  == Smart Solo IGU-16HR Polarity Notice ==
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406 406  **Finalizing the Download**:
407 407  
408 408  * After downloading, mark the //"D"// box on your temporary labels to indicate completion.
396 +
397 +
409 409  )))
410 410  
400 +[[image:1706153266647-145.png||data-xwiki-image-style-alignment="center" height="340" width="603"]]
411 411  
412 412  
413 413  
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441 441  
442 442  [[X axis is samples (.01 s), Y axis is velocity (m/s), 0.5-5 Hz filter>>image:IGU16_Z_huddle.png]]
443 443  
444 -[[X axis is samples (.01 s), Y axis is velocity (m/s), 0.5-5 Hz bandpass filter>>image:IGU16_N_huddle.png]]
434 +[[X axis is samples (.01 s), Y axis is velocity (m/s), 0.5-5 Hz filter>>image:IGU16_N_huddle.png]]
445 445  
446 446  == IGU 16-1C ==
447 447  
448 -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.
438 +The 1C nodes seem to have a slightly different response to the 3C, but the 3C version seems to fit a lot better than the version published at IRIS-NRL which has no PAZ information. We are looking into this.
449 449  
450 -[[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]]
451 -
452 452  == BD3C-5 ==
453 453  
454 454   'BD3C': {'poles':[(-1720.4+0j), (-1.2+0.9j), (-1.2-0.9j)],
... ... @@ -456,23 +456,23 @@
456 456   'gain':1.69726e-05,
457 457   'sensitivity': 702651512.6046528}
458 458  
459 -Above 0.5 Hz, the BD3C-5 response fits well:
447 +[[X axis is samples (.01 s), Y axis is velocity (m/s), 0.5-5 Hz filter>>image:BD3C_Z_huddle.png]]
460 460  
461 -[[X axis is samples (.01 s), Y axis is velocity (m/s), 0.5-5 Hz filter>>image:BD3C_Z_huddle.0.5.png]]
449 +[[X axis is samples (.01 s), Y axis is velocity (m/s), 0.5-5 Hz filter>>image:BD3C_N_huddle.png]]
462 462  
463 -[[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]]
451 +(% class="wikigeneratedid" %)
452 +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.
464 464  
465 465  (% class="wikigeneratedid" %)
466 -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:
455 +
467 467  
457 +[[BD3C 0.1 to 5 Hz bandpass>>image:BD3C_Z_huddle.0.1.png]]
468 468  
469 -[[BD3C **0.1 **to 5 Hz bandpass filter>>image:BD3C_Z_huddle.0.1.png]]
459 +[[BD3C 0.1 to 5 Hz bandpass>>image:BD3C_N_huddle.0.1.png]]
470 470  
471 -[[BD3C **0.1** to 5 Hz bandpass filter>>image:BD3C_N_huddle.0.1.png]]
472 -
473 473  == IGU-16 Horizontal noise & how to avoid ==
474 474  
475 -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.
463 +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.
476 476  
477 477  [[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]]
478 478  
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