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Changes for page ANU Seismic Data Loggers

Last modified by robert on 2025/06/27 16:42
From version 31.4
edited by Jack Dent
on 2024/12/19 13:04
Change comment: There is no comment for this version
To version 46.2
edited by robert
on 2025/06/15 13:57
Change comment: There is no comment for this version

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1 -XWiki.JackD
1 +XWiki.robert
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10 10  )))
11 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. For very sunny environments (latitudes < 30) a 10 Watt solar panel should suffice, however there is no harm in using 20 or even a 40 Watt panel. We generally recommend 20 Watt panels with at least a 7 Ah battery.
16 +
17 +
13 13  = Data Card Formatting and Information =
14 14  
15 15  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.
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20 20  
21 21  {{{XXX195G0100010034864 2 }}}
22 22  
23 -corresponding to site XXX19,
24 - network 5G,
25 - sample rate 0100, (i.e. 100 Hz)
26 - "gps interval" 01 (once per hour~-~- don't change),
27 - start mode (always 0),
28 - stop mode (always 0),
29 - seismometer type (3 = broadband (+/- 20V), 2 = Guralp (+/- 10V), 1 = shortperiod (+/- 5V),
30 - and seismometer serial number (4864).
28 +//corresponding to//
31 31  
30 + site **XXX19**,
31 + network **5G**,
32 + sample rate **0100**, (i.e. 100 Hz)
33 + "gps interval" **01** (once per hour~-~- don't change),
34 + start mode (always **0**),
35 + stop mode (always **0**),
36 + seismometer type (**3** = broadband (+/- 20V), 2 = Guralp (+/- 10V), 1 = shortperiod (+/- 5V),
37 + and seismometer serial number (**4864**).
38 +
32 32  (% class="box warningmessage" %)
33 33  (((
34 34  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)
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43 43  
44 44  SITE15G02500039999 2
45 45  
46 -corresponding to site SITE1,
53 +corresponding to site SITE1, 
47 47  
48 48   network 5G
49 49   sample rate 0250, (i.e. 250 Hz)
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57 57  
58 58  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
59 59  
67 +[[image:original_0747763c-e3dd-4667-b897-833f12c8e0b8_20241219_130604.jpg||height="240" width="298"]]
60 60  
61 61  Here is a general guideline for how much data you can expect to fit on a card:
62 62  
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64 64   32Gb card: 122 days @ 250hz or 305 days @ 100hz
65 65  }}}
66 66  
75 +== Default Settings ==
67 67  
77 +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.
78 +
79 +* XX.ANUSR network and station name
80 +* 100 Hz Sample Rate
81 +* 40V pp (or +/- 20 V) gain / Trillium Compact seismometer version
82 +* Record on Restart enabled
83 +
84 +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.
85 +
68 68  = Logger Menus Overview (and setup) =
69 69  
70 -The same menus are used in both types of loggers.
88 +The same menus are used in both the TSAWR and LPR-200 loggers.
71 71  
72 72  == System Information ==
73 73  
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75 75  
76 76  This menu also displays the firmware version, battery, external, and solar voltages, and the temperature of the system.
77 77  
78 -==== Upon setup ====
96 +* Check all Initialisation Parameters are marked as successful.
97 +* Check that solar voltage is above 10 V, otherwise the station will not last long.
79 79  
80 -- Check all Initialisation Parameters are marked as successful.
81 -
82 -- Check that solar voltage is above 10 V, otherwise the station will not last long.
83 -
84 -
85 85  == Live Seismometer Data ==
86 86  
87 87  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.
88 88  
89 -==== Upon setup ====
103 +* Check that all 3 channels are present and are producing a signal.
104 +* Stomp on the ground near where the sensor is installed to check that a signal is being picked up by all 3 channels.
105 +* Common representations of poor signals include channels sloping smoothly from high values to zero, or sharp corners in the plots.
90 90  
91 -- Check that all 3 channels are present and are producing a signal.
107 +== GPS Data ==
92 92  
93 -- Stomp on the ground near where the sensor is installed to check that a signal is being picked up by all 3 channels.
94 -
95 -- Common representations of poor signals include channels sloping smoothly from high values to zero, or sharp corners in the plots.
96 -
97 -
98 -== GPS ==
99 -
100 100  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.
101 101  
102 -==== Upon setup ====
111 +* Check that the station is connected to satellites
103 103  
104 -- Check that the station is connected to satellites
105 -
106 -
107 107  == SD Information ==
108 108  
109 109  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.
110 110  
111 -
112 112  == System Configuration ==
113 113  
114 114  This menu is used to set the stations identifiers and parameters.
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121 121  
122 122  The seismometer model and serial number (up to 10 characters) can be set. Seismometer model options include:
123 123  
124 -- Trillium Compact
129 +* Trillium Compact (same for 20 and 120)
130 +* CMG - 3ESP
131 +* Guralp 40T
132 +* LE-3D Lite
133 +* Mark L4C
134 +* Mark L4
125 125  
126 -- CMG - 3ESP
127 -
128 -- Guralp 40T
129 -
130 -- LE-3D Lite
131 -
132 -- Mark L4C
133 -
134 -- Mark L4
135 -
136 136  Additionally, the following settings can be used in place of the seismometer model types: +/- 20V, +/- 10V, +/- 5V
137 137  
138 138  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.
139 139  
140 -==== Upon setup ====
140 +* Set the sampling rate, station identifier, and network code. Set the appropriate seismometer type. Most importantly, ensure the record on restart setting is checked.
141 141  
142 -- Set the sampling rate, station identifier, and network code. Set the appropriate seismometer type. Most importantly, ensure the record on restart setting is checked.
143 -
144 144  (% class="box errormessage" %)
145 145  (((
146 146  NOTE: Ensure the 'RECORD ON RESTART' option is marked with a cross.
147 147  )))
148 148  
147 +(% class="wikigeneratedid" %)
148 +[[image:original_2b83fcf5-ee5a-4375-bab1-2d738e4ffe8c_20241219_130646.jpg||height="234" width="289"]]
149 +
149 149  == STA/LTA Configuration ==
150 150  
151 --
152 +The Short Term Average and Long Term Average Configuration screen.. this is a relic for when people weren't recording continuously. Not advised!
152 152  
153 -= =
154 -
155 155  = LogFile Conversion Script =
156 156  
157 157  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]].
158 158  
159 -= =
160 -
161 161  = Instrument Response =
162 162  
163 -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).
160 +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, 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).
164 164  
165 165  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.
166 166  
167 167  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).
168 168  
169 -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') )
166 +Instrument response can be downloaded from IRIS-NRL (v2) **TODO ADD LINK** if need be, or by downloading the response of an equivalent sensor at AusPass (e.g. get_stations(level='response') )
170 170  
171 171  
172 -= ANU TerraSAWR (Gen 3, FW 3.5a, 2017?- current) =
169 += ANU TerraSAWR (Gen 3, FW 3.5a, 2017- current) =
173 173  
174 -Text here
171 +Words to describe the TSAWR would go here, if needed
175 175  
176 -== Sub-paragraph ==
177 177  
178 -XXXX
179 179  
180 -== Sub-paragraph ==
181 -
182 -xx
183 -
184 -=== Sub-sub paragraph ===
185 -
186 -x
187 -
188 -
189 189  = ANU LPR-200 (Gen 2, FW 2.6a/2.7a, 2013 - current) =
190 190  
191 -Text here
177 +Ditto the mighty LPR!
192 192  
193 -== Sub-paragraph ==
194 194  
195 -x
180 += ANU "ANUSR" (Gen 1, 2003? - 2012) =
196 196  
197 -== Sub-paragraph ==
182 +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.
198 198  
199 -x
200 200  
201 -
202 -= ANU "ANUSR" (Gen 1, 2003? - 2013?) =
203 -
204 -x
205 -
206 206  = References =
207 207  
208 208  * [[PDF Manual>>http://auspass.edu.au/field/LPR-200_Instruction_Manual.pdf]]
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218 218  )))
219 219  
220 220  
200 +
201 +
202 +
221 221  (% class="box" %)
222 222  (((
223 223  = TerraSAWR Specs =
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230 230  [[image:1704864886951-793.jpg]]
231 231  
232 232  |=Size (L x W x H)|30 x 25 x12cm
233 -|=Weight (with battery)| ~*~*1.9kg (2.5kg)
215 +|=Weight (with battery)| 1.9kg (2.5kg)
234 234  |=Battery|(((
235 -Lead-acid 12v, ~~7Ah
217 +Lead-acid 12v, ~~7-9Ah
236 236  
237 237  Rechargeable
238 238  )))
221 +|=Current Firmware|3.5a (Jan 2025)
239 239  
240 240  [[image:terrasawr battery.jpg]]
241 241  )))
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252 252  [[image:LPR 3.jpg]]
253 253  
254 254  |=Size (L x W x H)|42 x 34 x17 cm
255 -|=Weight (with battery)|4.9 kg (7.3 kg)
238 +|=Weight (no battery)|5.5 kg
256 256  |=Battery|(((
257 -LiFePo4 140Ah
240 +NOW: Any 12v battery with tab connections that will fit (ex. the same TSAWR battery)
258 258  
259 -Rechargeable
242 +DISCONTINUED: LiFePo4 140Ah Rechargeable (shown below).
260 260  )))
244 +|=Current Firmware|(((
245 +2.6a (old GPS modules) / 2.7a
261 261  
247 +Jan 2025
248 +)))
249 +
262 262  [[image:LPR battery.jpg]]
263 263  )))
264 264  )))
265 265  )))
266 -
267 -
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