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Last modified by robert on 2026/02/27 19:58
From version 105.1
edited by robert
on 2026/02/17 12:38
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To version 105.4
edited by robert
on 2026/02/17 15:44
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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)**
11 +* **SmartSolo IGU-16 1C (5 Hz, 'very' short period, single channel. Not 'HR')**
12 12  
13 +Visit the [[SmartSolo page>>https://smartsolo.com/igu.html]] for more detail.
14 +
13 13  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.
14 14  
15 15  (% class="box infomessage" %)
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442 442   'gain':1.69726e-05,
443 443   'sensitivity': 702651512.6046528}
444 444  
445 -*image TBA but they have been created in the past~-~- we are 100% confident our published responses are correct
447 +[[X axis is samples (.01 s), Y axis is velocity (m/s), 0.5-5 Hz filter>>image:BD3C_Z_huddle.png]]
446 446  
447 -== Horizontal noise & how to avoid ==
449 +[[X axis is samples (.01 s), Y axis is velocity (m/s), 0.5-5 Hz filter>>image:BD3C_N_huddle.png]]
448 448  
449 -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.
451 +== IGU-16 Horizontal noise & how to avoid ==
450 450  
451 -[[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]]
453 +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.
452 452  
455 +[[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]]
456 +
457 +(% class="wikigeneratedid" %)
458 +The BD3C-5 nodes do not have this issue:
459 +
460 +[[BD3C-5 test, as above. There is no additional noise on the horizontal channels.>>image:BD3C_psd.png]]
461 +
453 453  = **Cleaning** =
454 454  
455 455  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.
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