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Last modified by robert on 2026/09/07 17:05
From version 120.2
edited by robert
on 2026/09/07 15:53
Change comment: There is no comment for this version
To version 119.1
edited by robert
on 2026/08/12 13:08
Change comment: There is no comment for this version

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... ... @@ -71,11 +71,11 @@
71 71  
72 72  We have experienced interference from animals (foxes, dogs, goats) digging up and carrying nodes off for tens or hundreds of metres. It is helpful to minimise human and food smells (particularly on the rope handles) when working in areas where this is a risk. Or, wipe down affected nodes with 50-80% methylated spirits if extensive handling can not be avoided.
73 73  
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.
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 76  = External Power =
77 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 standard 12v deep cycle AGM battery:
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 79  
80 80  - BD3C-5: ~~2 days of recording per 1 Ah
81 81  
... ... @@ -439,28 +439,6 @@
439 439  
440 440  ----
441 441  
442 -= Copying raw MiniSeed data without the Software =
443 -
444 -Lately we have been advocating for not writing to the proprietary DFD format (we don't know how this is structured!) in the event that the software is misbehaving or one wants to use a Linux or OSX machine or for whatever reason. If the nodes are programmed with an output set to MiniSeed, harvesting can be as simple as reading the devices as a mounted USB device and copying off the .MiniSeed files manually.
445 -
446 -However please note the filename and channel convention. Raw data (here a BD3C-5) as usual has completely bizarre default channel codes (e.g. this should be DH?). Take care to interpret XYZ correctly though- many manufacturers will sensibly define X as East, Y as North. **This is backwards here.**
447 -
448 -This raw stream...
449 -
450 -##3 Trace(s) in Stream:
451 -XX.TEST..LHX | 2026-09-01T03:26:14.000000Z - 2026-09-07T02:15:01.996000Z | 250.0 Hz, 128532000 samples
452 -XX.TEST..LHY | 2026-09-01T03:26:14.000000Z - 2026-09-07T02:15:01.996000Z | 250.0 Hz, 128532000 samples
453 -XX.TEST..LHZ | 2026-09-01T03:26:14.000000Z - 2026-09-07T02:15:01.996000Z | 250.0 Hz, 128532000 samples##
454 -
455 -Should be renamed as:
456 -
457 -##3 Trace(s) in Stream:
458 -XX.TEST..DHN | 2026-09-01T03:26:14.000000Z - 2026-09-07T02:15:01.996000Z | 250.0 Hz, 128532000 samples
459 -XX.TEST..DHE | 2026-09-01T03:26:14.000000Z - 2026-09-07T02:15:01.996000Z | 250.0 Hz, 128532000 samples
460 -XX.TEST..DHZ | 2026-09-01T03:26:14.000000Z - 2026-09-07T02:15:01.996000Z | 250.0 Hz, 128532000 samples##
461 -
462 -With** X = +North, Y = +East, and Z = +Z**
463 -
464 464  = Instrument Response =
465 465  
466 466  We are aware that there are various different published responses for these instruments and trust very few of them. One has to be careful with how polarity is handled between groups as well, and if one is working in integer counts (the ANSIR default) or mV (unclear why anyone would use this as it makes file sizes enormous). The response information published below is in **counts** and seems to fit well in huddle tests. Note that the response is the same for all channels and all units (e.g. there are no bespoke calibrations!), all appear to be sample rate insensitive, and the IGU data has been inverted (multiplied by -1) as described here: [[5Hz Node Polarity Issues>>https://auspass.edu.au/xwiki/bin/view/Data/AusPass%20Data/#HSmartSoloNodePolarityIssues]]