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Last modified by robert on 2025/08/21 13:08
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1 -SmartSolo Node Seismometers
1 +SmartSolo Nodes
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1 -XWiki.robert
1 +XWiki.KB
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16 16  
17 17  = **Programming Defaults** =
18 18  
19 -We recommend that the SP 16HR-3C be set to a gain of 24db and no higher than 250 Hz sampling rate unless there is an explicit reason to do so. The BD3C-5 should be set to a gain of 6db (which is the maximum allowed). These are what we use for our internal experiments.
19 +ANU recommends that the SP 16HR-3C be set to a gain of 24db and no higher than 250 Hz sampling rate. The BD3C-5 should be set to a gain of 6db (maximum allowed). These are what we use for our internal experiments. **Note that this gain must be removed when exporting to miniseed, **otherwise amplitudes will be a factor of either 15.84893192 (24db) or 2 (6db) too high. We also recommend disabling bluetooth to increase battery life, and to enable "FIFO" mode just in case old data is still present on the units and you run out of space (although it is unlikely you will go over 64 Gb for one deploy). If using the "timed turn-on" option, please be aware that **the units will not begin recording until they have acquired a GPS lock**, which may nor occur if they are buried too deeply or have very poor sky view.
20 20  
21 -**Note that this gain must be removed when exporting to miniseed, **otherwise amplitudes will be a factor of either 15.84893192 (24db) or 2 (6db) too high. We also recommend disabling bluetooth to increase battery life, and to enable "FIFO" mode just in case old data is still present on the units and you run out of space (although it is unlikely you will go over 64 Gb for one deploy). If using the "timed turn-on" option, please be aware that **the units will not begin recording until they have acquired a GPS lock**, which may nor occur if they are buried too deeply or have very poor sky view.
22 22  
23 -
24 24  = **Fieldwork Preparation** =
25 25  
26 26  (% class="box infomessage" %)
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30 30  **INVEST IN FAST EXTERNAL HARD DRIVES – DO NOT LET THIS BE THE LIMITATION OF DATA HARVESTING**
31 31  
32 32  **Assume ~~1 Tb of storage for both raw and exported data per 50 nodes @ 250 Hz & 30 days. One node recording at 250 Hz for 30 days tends to create about 3 Gb of miniseed data.**
33 -
34 -**We have had good experience with the 4Tb Samsung T7 Shield drives.**
35 35  )))
36 36  )))
37 37  
38 -== Magnets ==
39 -
40 -If you are short on magnets, you may find it easier and a lot cheaper to buy magnets in Australia. AMF Magnetics is a good retailer, and [[this item>>https://magnet.com.au/collections/shop?q=23012B]] seems to work well. It is also advantageous to use smaller magnets and store/carry them individually in your back pocket (as well as stick them to various places in your field vehicle, etc).
41 -
42 -== Animal-Proofing ==
43 -
44 -We have experienced times where foxes (or some other animal) will dig up nodes and potentially carry them off for tens or hundreds of meteres. Being sanitary with the rope handles (e.g. not getting food grease on them) seems to help, as well as spraying the nodes and handles with methylated spirits et al. when deploying. There are other specialized products available depending on your environment.
45 -
46 46  = **Installation** =
47 47  
48 48  == **1. Logbook documentation** ==
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116 116  
117 117  == **7. Additional Best Practices** ==
118 118  
107 +* **Environmental Responsibility**: Ensure that the node placement and the materials used are environmentally responsible and adhere to local regulations.
119 119  * **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.
120 120  
110 +* (((
111 +==== **Keeping the Instruments Clean** ====
112 +)))
113 +* (((
114 +Use a (**landfill**, not //compost//) degradable bag when installing to keep the instrument clean. This will save you many hours of time cleaning them in preparation for their return. [[Here is a video>>url:http://auspass.edu.au/field/bd3c_removal.mp4]] demonstrating its effectiveness.
115 +)))
116 +
121 121  ----
122 122  
123 123  = **Seismic Station Demobilization and Documentation** =
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249 249  (((
250 250  * **Ensure to export data as "COUNTS", not "mV".**
251 251  
252 -* **Set "Remove Gain" to the same decibel gain as during programming** **(by default ANU sets this to 24db for short period nodes (a factor of 15.848932), and 6db for broadband nodes).**
248 +* **Set "Remove Gain" to the same decibel gain as during programming** **(by default ANU sets this to 24db (a factor of 15.848932).**
253 253  )))
254 254  )))
255 255  
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309 309  
310 310  = **Cleaning** =
311 311  
312 -When still connected, the nodes are water resistant (don't submerge them!) and can handle a good spray / wipedown. A strong, non-wire brush is helpful to reach areas between the metal spikes on the bottom.
308 +**Procedure for Seismic Nodes:**
313 313  
310 +* If the nodes are placed in a sturdy plastic bag at the time of installation, the cleaning procedure should be straightforward. If not you have a lot of work to do before they are returned to us!
311 +
314 314  = **Weights (for shipping)** =
315 315  
316 316  The weights of bags of nodes, as well as data harvesters and node chargers, are listed below:
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