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Last modified by robert on 2025/08/21 13:08
From version 60.2
edited by robert
on 2025/07/16 16:08
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To version 57.1
edited by robert
on 2025/06/15 18:00
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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 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.
20 20  
21 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  
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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  
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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.
310 +**Procedure for Seismic Nodes:**
313 313  
312 +Top half:
313 +
314 +Bottom half: The metal spikes on the bottom half of the nodes can be cleaned using a wire brush, though should still be wiped down for dust afterwards.
315 +
316 +
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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