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Changes for page Seismometers

Last modified by robert on 2026/01/14 12:31
From version 48.1
edited by santi
on 2025/07/23 15:43
Change comment: There is no comment for this version
To version 49.1
edited by robert
on 2026/01/14 12:01
Change comment: There is no comment for this version

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Author
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1 -XWiki.santi
1 +XWiki.robert
Content
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44 44  
45 45  The LE-3D Lite are small, robust, short period sensors with a a corner period of 1 second.
46 46  
47 -=== SmartSolo Short periods ===
47 +=== SmartSolo BD3C-5 ===
48 48  
49 -Two types of SmartSolo brand seismometers are currently available, one of which is a short-period seismometer with corner frequency of 5 Hz. More information is available on the [[SmartSolo Seismometers page>>doc:Instrumentation.SmartSolo Nodes.WebHome]].
49 +Sometimes erroneously referred to as a "broadband node", the larger cylinder-shaped BD3C-5 is technically a //short period //instrument as it has a corner period of 5 seconds (< 10). It is still a high gain seismometer however (e.g. channels ?H[NEZ]). More information is available on the [[SmartSolo Seismometers page>>doc:Instrumentation.SmartSolo Nodes.WebHome]].
50 50  
51 +== Geophone Sensors ==
51 51  
53 +"Geophones" are technically "very short period", with corner frequencies >= 5 Hz. ANSIR currently have two geophone-type sensors available for loan: the 3-Channel SmartSolo IGU-16HR and 1-Channel SmartSolo IGU-16, both with 5 Hz (0.2 second) corners.
54 +
55 +The center character in the channel codes should be "P", e.g. DPN, DPE, DHZ for 250 Hz.
56 +
57 +(% class="box warningmessage" %)
58 +(((
59 +Note that SmartSolo branded geophone channels have inverted polarity relative to traditional standards!!! This applies only to the IGU-16HR instruments and NOT the BD3C-5 instruments.
60 +)))
61 +
52 52  = Channel and Instrument conventions =
53 53  
54 54  We follow FDSN guidelines for sensor channel and type naming conventions, outlined at [[SAGE / IRIS>>https://ds.iris.edu/ds/nodes/dmc/data/formats/seed-channel-naming/]] and also copied below:
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70 70  |P|On the order of 0.1 to 1 day ^^1^^|≥ 0.00001 to < 0.0001|
71 71  |T|On the order of 1 to 10 days ^^1^^|≥ 0.000001 to < 0.00001|
72 72  |Q|Greater than 10 days ^^1^^|< 0.000001|
73 -|A|Administrative Instrument Channel|variable|NA
74 -|O|Opaque Instrument Channel|variable|NA
75 75  )))
76 76  
77 77  (% class="col-xs-12 col-sm-4" %)