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Changes for page ANU Seismic Data Loggers

Last modified by robert on 2025/11/04 15:36
From version 66.1
edited by robert
on 2025/09/16 13:19
Change comment: There is no comment for this version
To version 68.1
edited by robert
on 2025/11/04 15:13
Change comment: There is no comment for this version

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28 28  
29 29  = GPS Considerations =
30 30  
31 -GPS is required for the data to have accurate timestamps. A standard 3-5V 1575.42 Mhz coaxial cable works fine and can be found for relatively cheap (e.g. [[https:~~/~~/www.elecbee.com/en-3555-gps-antenna-bnc-male-for-garmin-gps-120120xl125-sounder-with-cable-2m) >>https://www.elecbee.com/en-3555-gps-antenna-bnc-male-for-garmin-gps-120120xl125-sounder-with-cable-2m]]
31 +GPS is required for the data to have accurate timestamps. A standard 3-5V 1575.42 Mhz coaxial "dongle" antenna works fine and can be found for relatively cheap (e.g. [[https:~~/~~/www.elecbee.com/en-3555-gps-antenna-bnc-male-for-garmin-gps-120120xl125-sounder-with-cable-2m) >>https://www.elecbee.com/en-3555-gps-antenna-bnc-male-for-garmin-gps-120120xl125-sounder-with-cable-2m]]. Anything that locates satellites and gives you a GPS-synced time works!
32 32  
33 33  The TerraSAWR has a built-in GPS but this doesn't work as well, especially if the logger is (wisely) buried. **The LPR does NOT have a built-in GPS antenna, so an external antenna is mandatory.**
34 34  
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238 238  
239 239  Earliest known model is dated May 2011 (but first deployed November 2012) and still in use today. Potentially capable of housing much larger batteries than the TSAWR due to the larger cavity space.
240 240  
241 +We have found that the older LPR SD card slots can sometimes fail such that the data cards prematurely "pop out" during recording, which can be catastrophic. This seems to mostly occur in periods of hot weather, but not always. We have developed a small add-on that screws into the nearby serial port that effectively holds the cards in place and will ship included with these loggers. Screw the device in firmly, then **gently** slide over a pre-inserted card. Take care not to force the depress the card inadvertently (although testing has shown it will still record).
242 +
243 + [[image:LPR_card_adaptors.jpg||alt="image of the LPR SD-card adapter"]]
244 +
241 241  = ANU "ANUSR" (Gen 1, 2003? - 2012) =
242 242  
243 243  This logger has been retired for a long time and has a different instrument response. It used modular component boards and was powered via an acrylic case of 6 x 6V lantern batteries. There is a somewhat complete one above the CAT lab door if anyone is so inclined to have a look.
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282 282  
287 +
288 +
283 283  (% class="box" %)
284 284  (((
285 285  = TerraSAWR Specs =
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338 338  
339 339  
340 340  
347 +
348 +
341 341  
342 342  )))
LPR_card_adaptors.jpg
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1 +XWiki.robert
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