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Changes for page ANU Seismic Data Loggers

Last modified by robert on 2025/06/27 16:42
From version 49.1
edited by robert
on 2025/06/27 16:42
Change comment: There is no comment for this version
To version 41.1
edited by robert
on 2025/03/03 18:19
Change comment: There is no comment for this version

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2 2  (((
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4 -(((
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8 -(((
9 9  ANU has designed and built three generations of seismic data recorders, two of which (the small yellow TerraSAWR and the larger beige LPR-200) are still in use today. Despite their contrasting appearance, they both use the same software, data cards, and have the same instrument response.
10 10  )))
11 -)))
12 12  
13 -= Power Considerations =
14 -
15 -Both the LPR-200 (or "Low Power Recorder" 200) and TerraSAWR are designed to use as little power as possible, and more or less use the same amount of power.
16 -
17 -At 100 Hz and with a GPS cable connected these loggers draw about 220 mW of power once the screen is off (higher sample rates draw more power but only marginally, < 5mW). Adding a sensor (e.g. a Trillium Compact 120) increases this to approximately 400 mW, or 0.4 volt-amps. So, in theory 7 Ah battery should last about 10 days without a solar panel, but in practice it seems to be a bit closer to 8 which may be due to variability in power drain while in getting GPS locks.
18 -
19 -For very sunny environments (latitudes < 30) a 20V 10 Watt solar panel should have no issue keeping these loggers alive over the summer months, and assuming unobstructed skies should also be fine over winter. However there is no harm in using 20 or even a 40 Watt panel, especially for high latitudes, coastal regions, or areas without a full sky view. In theory up to a 60 Watt solar panel is fine, but we don't recommend anything over 40 Watts and that amount of power is already overkill.
20 -
21 -(% class="box infomessage" %)
22 -(((
23 -Power issues are easy and cheap to solve relative to the cost of your experiment, don't skimp!
24 -)))
25 -
26 26  = Data Card Formatting and Information =
27 27  
28 -Both the TerraSAWR and LPR-200 require SD Cards to be formatted in FAT32 filesystem. For 64Gb cards it can be difficult to format in FAT32, but [[software >>http://auspass.edu.au/field/fat32cardformatter.exe]]is available. ANU recommend SanDisk Extreme 150 mb/s cards in either 32 or 64Gb size. We strongly discourage using cards larger than 64Gb, and in general smaller cards are less likely to fail. We have also found that "adapter" cards (e.g. SD to microSD) are prone to having write issues and **strongly** advise against them.
8 +Both the TerraSAWR and LPR-200 require SD Cards to be formatted in FAT32 filesystem. For 64Gb cards it can be difficult to format in FAT32, but [[software >>url:http://auspass.edu.au/field/fat32cardformatter.exe]]is available. ANU recommend SanDisk Extreme 150 mb/s cards in either 32 or 64Gb size. We strongly discourage using cards larger than 64Gb, and in general smaller cards are less likely to fail. We have also found that "adapter" cards (e.g. SD to microSD) are prone to having write issues and **strongly** advise against them.
29 29  
30 -The loggers can be "pre-programmed" with information (e.g. site name, sampling rate, etc) or they can be programmed in the field using the buttons on the logger. To pre-program the cards you simply edit a text file (named "[[ANUSRSetup.txt>>http://auspass.edu.au/field/ANUSRSetup.txt]]" for the LPRs, or "[[tSAWRSetup.txt>>http://auspass.edu.au/field/tSAWRSetup.txt]]" for the TerraSAWRs) and place it in the root directory on the SDCard. When the logger boots up, it will parse and load this information.
10 +The loggers can be "pre-programmed" with information (e.g. site name, sampling rate, etc) or they can be programmed in the field using the buttons on the logger. To pre-program the cards you simply edit a text file (named "[[ANUSRSetup.txt>>url:http://auspass.edu.au/field/ANUSRSetup.txt]]" for the LPRs, or "[[tSAWRSetup.txt>>url:http://auspass.edu.au/field/tSAWRSetup.txt]]" for the TerraSAWRs) and place it in the root directory on the SDCard. When the logger boots up, it will parse and load this information.
31 31  
32 -== The format for ANUSRSetup.txt / LPR200s will be a single line of text that looks like this: ==
12 +=== The format for ANUSRSetup.txt / LPR200s will be a single line of text that looks like this: ===
33 33  
34 34  {{{XXX195G0100010034864 2 }}}
35 35  
36 -//corresponding to//
16 +corresponding to site XXX19,
17 + network 5G,
18 + sample rate 0100, (i.e. 100 Hz)
19 + "gps interval" 01 (once per hour~-~- don't change),
20 + start mode (always 0),
21 + stop mode (always 0),
22 + seismometer type (3 = broadband (+/- 20V), 2 = Guralp (+/- 10V), 1 = shortperiod (+/- 5V),
23 + and seismometer serial number (4864).
37 37  
38 - site **XXX19**,
39 - network **5G**,
40 - sample rate **0100**, (i.e. 100 Hz)
41 - "gps interval" **01** (once per hour~-~- don't change),
42 - start mode (always **0**),
43 - stop mode (always **0**),
44 - seismometer type (**3** = broadband (+/- 20V), 2 = Guralp (+/- 10V), 1 = shortperiod (+/- 5V),
45 - and seismometer serial number (**4864**).
46 -
47 47  (% class="box warningmessage" %)
48 48  (((
49 49  NOTE: the 2 at the very end is for "RECORD ON RESTART". The record on restart option ensures that if the logger dies and is powered back up whilst in the field (due to battery charging cycles or other causes) that the recording will resume. (# of blank spaces before this doesn't matter)
50 50  )))
51 51  
52 -== The format for TSAWR loggers is shorter: ==
30 +=== The format for TSAWR loggers is shorter: ===
53 53  
54 54  (% class="box errormessage" %)
55 55  (((
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68 68   and seismometer serial number (9999).
69 69  
70 70  
71 -== The formatting process using the logger: ==
49 +=== The formatting process using the logger: ===
72 72  
73 73  The process for formatting an SD card within the logger is straightforward. Navigate to the "SD INFORMATION" screen and press ERASE SD CARD. This process may take up to a minute. This will result in erasing all files from the card. Upon starting recording, a new 'seed' will be written containing all the information that the logger has been set with FINISH THIS SECTION
74 74  
75 -[[image:original_0747763c-e3dd-4667-b897-833f12c8e0b8_20241219_130604.jpg||height="240" width="298"]]
53 +[[image:/xwiki/bin/download/Instrumentation/ANU%20LPR-200/WebHome/original_0747763c-e3dd-4667-b897-833f12c8e0b8_20241219_130604.jpg?width=298&height=240&rev=1.1||alt="original_0747763c-e3dd-4667-b897-833f12c8e0b8_20241219_130604.jpg" height="240" width="298"]]
76 76  
77 77  Here is a general guideline for how much data you can expect to fit on a card:
78 78  
... ... @@ -80,17 +80,7 @@
80 80   32Gb card: 122 days @ 250hz or 305 days @ 100hz
81 81  }}}
82 82  
83 -== Default Settings ==
84 84  
85 -As of 2025, the default settings for both LPR (v. 2.7) and TSWAR (v 3.6a) loggers are below. If you're using a broadband instrument, you are essentially good to go without having to program the cards.
86 -
87 -* XX.ANUSR network and station name
88 -* 100 Hz Sample Rate
89 -* 40V pp (or +/- 20 V) gain / Trillium Compact seismometer version
90 -* Record on Restart enabled
91 -
92 -Note that if a user sets the gain incorrectly, this can be fixed later (assuming nothing clipped) by multiplying or dividing by factors of 2. The gain setting can be looked up from the logfile, else you may have to guess from a PSD or other method.
93 -
94 94  = Logger Menus Overview (and setup) =
95 95  
96 96  The same menus are used in both the TSAWR and LPR-200 loggers.
... ... @@ -101,27 +101,40 @@
101 101  
102 102  This menu also displays the firmware version, battery, external, and solar voltages, and the temperature of the system.
103 103  
104 -* Check all Initialisation Parameters are marked as successful.
105 -* Check that solar voltage is above 10 V, otherwise the station will not last long.
72 +==== Upon setup ====
106 106  
74 +- Check all Initialisation Parameters are marked as successful.
75 +
76 +- Check that solar voltage is above 10 V, otherwise the station will not last long.
77 +
78 +
107 107  == Live Seismometer Data ==
108 108  
109 109  This screen displays real time seismometer data for all 3 axes of the seismometer. Initially, a plot of raw data from all 3 channels is shown. By pressing enter, a high pass filter can be applied showing a more useful plot of all channels. The up and down arrows can be used to change between a view of all channels, individual channels, and all channels on different X axes.
110 110  
111 -* Check that all 3 channels are present and are producing a signal.
112 -* Stomp on the ground near where the sensor is installed to check that a signal is being picked up by all 3 channels.
113 -* Common representations of poor signals include channels sloping smoothly from high values to zero, or sharp corners in the plots.
83 +==== Upon setup ====
114 114  
85 +- Check that all 3 channels are present and are producing a signal.
86 +
87 +- Stomp on the ground near where the sensor is installed to check that a signal is being picked up by all 3 channels.
88 +
89 +- Common representations of poor signals include channels sloping smoothly from high values to zero, or sharp corners in the plots.
90 +
91 +
115 115  == GPS Data ==
116 116  
117 117  This menu displays the status of the stations' GPS connection. The screen lists; UTC time, UTC date, latitude, longitude, altitude, number of satellite connections, and SNR.
118 118  
119 -* Check that the station is connected to satellites
96 +==== Upon setup ====
120 120  
98 +- Check that the station is connected to satellites
99 +
100 +
121 121  == SD Information ==
122 122  
123 123  The menu lists if the SD card has been initialised, as well as the capacity and space free on the memory card. See "Data card formatting" (above) to see how to format and initialise the inserted SD card.
124 124  
105 +
125 125  == System Configuration ==
126 126  
127 127  This menu is used to set the stations identifiers and parameters.
... ... @@ -134,19 +134,26 @@
134 134  
135 135  The seismometer model and serial number (up to 10 characters) can be set. Seismometer model options include:
136 136  
137 -* Trillium Compact (same for 20 and 120)
138 -* CMG - 3ESP
139 -* Guralp 40T
140 -* LE-3D Lite
141 -* Mark L4C
142 -* Mark L4
118 +- Trillium Compact
143 143  
120 +- CMG - 3ESP
121 +
122 +- Guralp 40T
123 +
124 +- LE-3D Lite
125 +
126 +- Mark L4C
127 +
128 +- Mark L4
129 +
144 144  Additionally, the following settings can be used in place of the seismometer model types: +/- 20V, +/- 10V, +/- 5V
145 145  
146 146  The record on restart option ensures that if the logger dies and is powered back up whilst in the field (due to battery charging cycles or other causes) that the recording will resume.
147 147  
148 -* Set the sampling rate, station identifier, and network code. Set the appropriate seismometer type. Most importantly, ensure the record on restart setting is checked.
134 +==== Upon setup ====
149 149  
136 +- Set the sampling rate, station identifier, and network code. Set the appropriate seismometer type. Most importantly, ensure the record on restart setting is checked.
137 +
150 150  (% class="box errormessage" %)
151 151  (((
152 152  NOTE: Ensure the 'RECORD ON RESTART' option is marked with a cross.
... ... @@ -153,49 +153,62 @@
153 153  )))
154 154  
155 155  (% class="wikigeneratedid" %)
156 -[[image:original_2b83fcf5-ee5a-4375-bab1-2d738e4ffe8c_20241219_130646.jpg||height="234" width="289"]]
144 +[[image:/xwiki/bin/download/Instrumentation/ANU%20LPR-200/WebHome/original_2b83fcf5-ee5a-4375-bab1-2d738e4ffe8c_20241219_130646.jpg?width=289&height=234&rev=1.1||alt="original_2b83fcf5-ee5a-4375-bab1-2d738e4ffe8c_20241219_130646.jpg" height="234" width="289"]]
157 157  
158 158  == STA/LTA Configuration ==
159 159  
160 -The Short Term Average and Long Term Average Configuration screen.. this is a relic for when people weren't recording continuously. Not advised!
148 +The Short Term Average and Long Term Average Configuration screen is no longer used.
161 161  
150 +
162 162  = LogFile Conversion Script =
163 163  
164 -Both the TSAWR and LPR-200 write logging information as a binary "dat" file which includes GPS time syncs, temperatures, battery power, and position. To convert them into ASCII you can read, use [[THIS PYTHON SCRIPT>>http://auspass.edu.au/field/anusr_log.py]].
153 +Both the TSAWR and LPR-200 write logging information as a binary "dat" file which includes GPS time syncs, temperatures, battery power, and position. To convert them into ASCII you can read, use [[THIS PYTHON SCRIPT>>url:http://auspass.edu.au/field/anusr_log.py]].
165 165  
155 +
166 166  = Instrument Response =
167 167  
168 -Both the TerraSAWR and LPR-200 use the same ADS1281 analog-to-digital converter chip and are designed to have identical instrument response. The ADC (analog to digital) chip in both loggers originally samples at 1024000 Hz and downsamples towards the output data rate via various stages. First via a 5th order SINC filter, then another 32x via 3-4 2x or 4x FIR filters. If the output is below 250 Hz, a final "pure" /5 decimation is done without any sort of FIR filter.
158 +Both the TerraSAWR and LPR-200 use the same ADS1281 analog-to-digital converter chip and are designed to have identical instrument response. Depending on the output sample rate (e.g. 100 Hz, 250 Hz, 500 Hz, 1000 Hz) amplitude response is consistently flat up to ~~100 Hz but phase response can vary above 1 Hz at 100 Hz (or 10 Hz at 250 Hz).
169 169  
170 -{{info}}
171 -All SINC and FIR filters are performed internally within the logger and all phase delays are accounted for. Thus, the FIR coefficients and delays are not needed/given in the response information.
172 -{{/info}}
160 +The user can choose to apply a 2nd stage "sensor gain" by selecting an instrument type in the setup menu. This effectively selects a 10 Vpp (e.g. short period sensors), 20 Vpp, 40 Vpp (most broadband sensors) regime to match the sensor's sensitivity. This has the effect of doubling amplitude from 10v to 20v, or quadrupling from 10v to 40v. If you have set your sensor correctly (and the signal isn't clipped!) you can "correct" this by simply multiplying your data by 0.5 etc.
173 173  
174 -The user can choose to apply a 2nd stage "sensor gain" by selecting an instrument type in the setup menu. This effectively selects a 10 Vpp (e.g. short period sensors), 20 Vpp, 40 Vpp (most broadband sensors) regime to match the sensor's sensitivity. This has the effect of doubling amplitude from 10v to 20v, or quadrupling from 10v to 40v. If you have set your sensor correctly (and the signal isn't clipped!) you can "correct" this by simply multiplying your data by 0.5 etc. This gain manifests itself in stage 2 in the response information.
162 +Another important thing to note is that the group delay associated with late stage FIR filters is **automatically applied in the logger**, hence there is no need to apply this in the response. These tend to max out at 0.124 seconds for most output sampling rates (0.062 s for 100 Hz).
175 175  
176 -Instrument response can be downloaded from IRIS [[Nominal Response Library>>https://ds.iris.edu/ds/nrl/]] if need be, or [[directly from us>>http://auspass.edu.au/data/logger_response]] , or by downloading the response of an equivalent sensor at AusPass (e.g. get_stations(level='response') ).
164 +Instrument response can be downloaded from IRIS-NRL (v2) if need be, or by downloading the response of an equivalent sensor at AusPass (e.g. get_stations(level='response') )
177 177  
178 178  
179 -= ANU TerraSAWR (Gen 3, FW 3.5a, 2017- current) =
167 += ANU TerraSAWR (Gen 3, FW 3.5a, 2017?- current) =
180 180  
181 -Not sure there's much left to say
169 +Text here
182 182  
171 +== Sub-paragraph ==
183 183  
173 +XXXX
184 184  
175 +== Sub-paragraph ==
176 +
177 +xx
178 +
179 +
180 +
181 +
185 185  = ANU LPR-200 (Gen 2, FW 2.6a/2.7a, 2013 - current) =
186 186  
187 -Ditto the mighty LPR!
184 +Text here
188 188  
186 +== Sub-paragraph ==
189 189  
190 -= ANU "ANUSR" (Gen 1, 2003? - 2012) =
188 +x
191 191  
192 -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.
193 193  
194 194  
192 += ANU "ANUSR" (Gen 1, 2003? - 2013?) =
193 +
194 +x
195 +
195 195  = References =
196 196  
197 -* [[PDF Manual>>http://auspass.edu.au/field/LPR-200_Instruction_Manual.pdf]]
198 -)))
198 +* [[PDF Manual>>url:http://auspass.edu.au/field/LPR-200_Instruction_Manual.pdf]]
199 +~)~)~)
199 199  
200 200  (% class="col-xs-12 col-sm-4" %)
201 201  (((
... ... @@ -203,36 +203,61 @@
203 203  (((
204 204  **Contents**
205 205  
206 -{{toc/}}
207 +(% class="wikitoc" %)
208 +* [[Data Card Formatting and Information>>path:#HDataCardFormattingandInformation]]
209 +**
210 +*** [[The format for ANUSRSetup.txt / LPR200s will be a single line of text that looks like this:>>path:#HTheformatforANUSRSetup.txt2FLPR200swillbeasinglelineoftextthatlookslikethis:]]
211 +*** [[The format for TSAWR loggers is shorter:>>path:#HTheformatforTSAWRloggersisshorter:]]
212 +*** [[The formatting process using the logger:>>path:#HTheformattingprocessusingthelogger:]]
213 +* [[Logger Menus Overview (and setup)>>path:#HLoggerMenusOverview28andsetup29]]
214 +** [[System Information>>path:#HSystemInformation]]
215 +***
216 +**** [[Upon setup>>path:#HUponsetup]]
217 +** [[Live Seismometer Data>>path:#HLiveSeismometerData]]
218 +***
219 +**** [[Upon setup>>path:#HUponsetup-1]]
220 +** [[GPS Data>>path:#HGPSData]]
221 +***
222 +**** [[Upon setup>>path:#HUponsetup-2]]
223 +** [[SD Information>>path:#HSDInformation]]
224 +** [[System Configuration>>path:#HSystemConfiguration]]
225 +***
226 +**** [[Upon setup>>path:#HUponsetup-3]]
227 +** [[STA/LTA Configuration>>path:#HSTA2FLTAConfiguration]]
228 +* [[LogFile Conversion Script>>path:#HLogFileConversionScript]]
229 +* [[Instrument Response>>path:#HInstrumentResponse]]
230 +* [[ANU TerraSAWR (Gen 3, FW 3.5a, 2017?- current)>>path:#HANUTerraSAWR28Gen32CFW3.5a2C20173F-current29]]
231 +** [[Sub-paragraph>>path:#HSub-paragraph]]
232 +** [[Sub-paragraph>>path:#HSub-paragraph-1]]
233 +* [[ANU LPR-200 (Gen 2, FW 2.6a/2.7a, 2013 - current)>>path:#HANULPR-20028Gen22CFW2.6a2F2.7a2C2013-current29]]
234 +** [[Sub-paragraph>>path:#HSub-paragraph-2]]
235 +* [[ANU "ANUSR" (Gen 1, 2003? - 2013?)>>path:#HANU22ANUSR2228Gen12C20033F-20133F29]]
236 +* [[References>>path:#HReferences]]
237 +* [[TerraSAWR Specs>>path:#HTerraSAWRSpecs]]
238 +* [[LPR-200 Specs>>path:#HLPR-200Specs]]
207 207  )))
208 208  
209 209  
210 -
211 -
212 -
213 -
214 -
215 215  (% class="box" %)
216 216  (((
217 217  = TerraSAWR Specs =
218 218  
219 219  
220 -[[image:Terrasawr 1.jpg]]
247 +[[image:/xwiki/bin/download/Instrumentation/ANU%20LPR-200/WebHome/Terrasawr%201.jpg?rev=1.1||alt="Terrasawr 1.jpg"]]
221 221  
222 -[[image:1704865206800-824.jpg]]
249 +[[image:/xwiki/bin/download/Instrumentation/ANU%20LPR-200/WebHome/1704865206800-824.jpg?rev=1.1||alt="1704865206800-824.jpg"]]
223 223  
224 -[[image:1704864886951-793.jpg]]
251 +[[image:/xwiki/bin/download/Instrumentation/ANU%20LPR-200/WebHome/1704864886951-793.jpg?rev=1.1||alt="1704864886951-793.jpg"]]
225 225  
226 226  |=Size (L x W x H)|30 x 25 x12cm
227 -|=Weight (with battery)| 1.9kg (2.5kg)
254 +|=Weight (with battery)| ~*~*1.9kg (2.5kg)
228 228  |=Battery|(((
229 -Lead-acid 12v, ~~7-9Ah
256 +Lead-acid 12v, ~~7Ah
230 230  
231 231  Rechargeable
232 232  )))
233 -|=Current Firmware|3.5a (Jan 2025)
234 234  
235 -[[image:terrasawr battery.jpg]]
261 +[[image:/xwiki/bin/download/Instrumentation/ANU%20LPR-200/WebHome/terrasawr%20battery.jpg?rev=1.1||alt="terrasawr battery.jpg"]]
236 236  )))
237 237  
238 238  
... ... @@ -240,26 +240,22 @@
240 240  (((
241 241  = LPR-200 Specs =
242 242  
243 -[[image:LPR 1.jpg]]
269 +[[image:/xwiki/bin/download/Instrumentation/ANU%20LPR-200/WebHome/LPR%201.jpg?rev=1.3||alt="LPR 1.jpg"]]
244 244  
245 -[[image:LPR 2.jpg]]
271 +[[image:/xwiki/bin/download/Instrumentation/ANU%20LPR-200/WebHome/LPR%202.jpg?rev=1.3||alt="LPR 2.jpg"]]
246 246  
247 -[[image:LPR 3.jpg]]
273 +[[image:/xwiki/bin/download/Instrumentation/ANU%20LPR-200/WebHome/LPR%203.jpg?rev=1.8||alt="LPR 3.jpg"]]
248 248  
249 249  |=Size (L x W x H)|42 x 34 x17 cm
250 -|=Weight (no battery)|5.5 kg
276 +|=Weight (with battery)|4.9 kg (7.3 kg)
251 251  |=Battery|(((
252 -NOW: Any 12v battery with tab connections that will fit (ex. the same TSAWR battery)
278 +LiFePo4 140Ah
253 253  
254 -DISCONTINUED: LiFePo4 140Ah Rechargeable (shown below).
280 +Rechargeable
255 255  )))
256 -|=Current Firmware|(((
257 -2.6a (old GPS modules) / 2.7a
258 258  
259 -Jan 2025
283 +[[image:/xwiki/bin/download/Instrumentation/ANU%20LPR-200/WebHome/LPR%20battery.jpg?rev=1.1||alt="LPR battery.jpg"]]
260 260  )))
261 -
262 -[[image:LPR battery.jpg]]
263 263  )))
264 -)))
265 -)))
286 +
287 +~)~)~)
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