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Last modified by robert on 2026/08/12 13:08
From version 118.1
edited by robert
on 2026/08/12 13:06
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To version 110.5
edited by Jack Dent
on 2026/06/15 10:02
Change comment: (Autosaved)

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1 -XWiki.robert
1 +XWiki.JackD
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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 -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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106 106  
107 107  [[HERE>>http://auspass.edu.au/field/NODES_blank_fieldlog.pdf]] is an example logsheet that works well for nodes, feel free to print and use!
108 108  
109 -== 2. Burial ==
110 -
111 -ALL nodes should be buried flush with the ground, no exceptions. If the node is sticking up the data data quality will be significantly reduced (especially the horizontal channels, see [[below>>https://auspass.edu.au/xwiki/bin/view/Instrumentation/SmartSolo%20Nodes/#HIGU-16Horizontalnoise26howtoavoid]]). It also catches wind, makes them more visible, etc. But mostly it makes the data bad. //Don't be lazy. Do it right. //
112 -
113 -[[An example of what not to do.>>image:1786503344572-296.jpg||data-xwiki-image-style-alignment="center" height="341" width="404"]]
114 -
115 -[[North channel PSD of the sensor in the picture above (not good)>>image:1786503812585-338.02.28 PM.png||data-xwiki-image-style-alignment="center" height="244" width="451"]]
116 -
117 -== 3. Node Placement ==
97 +== 2. Node Placement ==
118 118  )))
119 119  
120 120  **Site Analysis**:
121 121  
122 -* **Take compass measurements away from the sensor as it will affect your measurement. Use a stick or shovel to help align.**
123 -* Take photographs from various angles to document the site setup thoroughly. Have a colleague stand next to it pointing at it.
124 -* 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
125 125  
126 -== 4. GPS Considerations ==
106 +== 3. GPS Considerations ==
127 127  
128 128  (% class="wikigeneratedid" %)
129 -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.
130 130  
131 -== 5. Visibility and Location Marking ==
111 +== 4. Visibility and Location Marking ==
132 132  
133 133  **Flag Placement**: Position a flag, preferably in a bright color (avoid green or yellow), near the instrument to aid in its future location.
134 134  
135 135  **GPS Marking**:
136 136  
137 -* 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.
138 -* 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.
139 139  
140 -== (% style="color:inherit; font-family:inherit; font-size:max(18px, min(20px, 14.4444px + 0.462963vw))" %)6. Charge Time, Pre-Deployment & Post-Deployment(%%) ==
120 +== (% style="color:inherit; font-family:inherit; font-size:max(18px, min(20px, 14.4444px + 0.462963vw))" %)5. Charge Time, Pre-Deployment & Post-Deployment(%%) ==
141 141  
142 142  * **Charging Duration**: Both types of nodes take approximately 6-8 hours to fully charge from a flat state.
143 143  * **Pre-Deployment Charging**:
144 144  ** Although the nodes hold their charge well, it's beneficial to give them a "top up" charge before deployment.
125 +
145 145  * **Operational Duration**:
146 146  ** When recording at 250 Hz, with GPS on and Bluetooth disabled, the instruments are expected to last about 30 days per charge cycle. If they are set to run only overnight, this can be extended to 60 days.
147 147  
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156 156  ** Charge levels for transport will be advised by the freighter. The required SoC will depend on volume and transport method (air, land, sea).
157 157  
158 158  (((
159 -== 7. Data Sharing and Metadata Creation ==
140 +== 6. Data Sharing and Metadata Creation ==
160 160  )))
161 161  
162 162  **GPS Data**:
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171 171  
172 172  * Create and organize metadata according to the [[ANU metadata standard txt file>>attach:example_metadata.txt]]. This is going to be particularly important if you are reusing nodes at different sites... not documenting the serial numbers (of the **top half** of the node) and the times they were deployed can lead to station mix-ups.
173 173  
174 -== 8. Additional Best Practices ==
155 +== 7. Additional Best Practices ==
175 175  
176 176  * **Training and Familiarisation**: Make sure all team members are adequately trained in using the GPS devices, compass use, and other equipment to ensure consistent and accurate data collection.
177 177  
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338 338  **Exporting Data in Readable Format**:
339 339  
340 340  * Go to the “Tool” menu and select “export seismic data”.
341 -* 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 project preference and ensure "Sample Interval" matches the setting used during node reset.
342 342  * (% class="box warningmessage" %)
343 343  (((
344 344  **Ensure export data is set to "COUNTS" (int32), not "mV" (float). This is critical!**
345 345  )))
346 346  * 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.
347 -* Set "Remove DC" to "Yes" to centre the data around the zero value
328 +* Set 'Remove DC' to 'Yes' to centre the data around the zero value
348 348  * Set the correct Start Time (UTC) and End Time (UTC) of the project to prevent the unnecessary export of older data
349 349  * [[image:Smartsolo harvesting #9 copy.png]]
350 350  * Click “prepare” followed by “run” to start reformatting. Monitor this process in the small panel at the bottom left.
351 -* 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]]
332 +* 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
352 352  )))
353 353  
354 354  == Smart Solo IGU-16HR Polarity Notice ==
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448 448   'gain':1,
449 449   'sensitivity': 257019225.55108312}
450 450  
451 -[[X axis is samples (.01 s), Y axis is velocity (m/s), 0.5-5 Hz filter>>image:16HR_Z_huddle.png||alt="IGU16_Z_huddle.png"]]
432 +[[X axis is samples (.01 s), Y axis is velocity (m/s), 0.5-5 Hz filter>>image:IGU16_Z_huddle.png]]
452 452  
453 -[[X axis is samples (.01 s), Y axis is velocity (m/s), 0.5-5 Hz bandpass filter>>image:16HR_N_huddle.png||alt="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]]
454 454  
455 455  == IGU 16-1C ==
456 456  
457 457  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.
458 458  
459 -[[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:16HR1C_Z_huddle.png||alt="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]]
460 460  
461 461  == BD3C-5 ==
462 462  
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472 472  [[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]]
473 473  
474 474  (% class="wikigeneratedid" %)
475 -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). We are working to try to calibrate this a bit better. In the next two figures the filter is **0.1** to 5 Hz:
456 +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:
476 476  
477 477  
478 478  [[BD3C **0.1 **to 5 Hz bandpass filter>>image:BD3C_Z_huddle.0.1.png]]
16HR1C_Z_huddle.png
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XWiki.XWikiComments[0]
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1 -Mark Goldman
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1 -I can verify that the default orientation for the SmartSolo 3C nodes is positive values for case motion to the South, West, and downwards. We have co-located nodes with permanent stations and noticed this correlation when comparing waveforms.
Date
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1 -2026-07-09 10:45:51.967