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Changes for page ANU Seismic Data Loggers

Last modified by robert on 2025/08/08 16:09
From version 45.1
edited by robert
on 2025/04/24 13:38
Change comment: There is no comment for this version
To version 26.2
edited by robert
on 2024/02/13 12:51
Change comment: There is no comment for this version

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... ... @@ -16,155 +16,69 @@
16 16  
17 17  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.
18 18  
19 -=== The format for ANUSRSetup.txt / LPR200s will be a single line of text that looks like this: ===
19 +The format for ANUSRSetup.txt / LPR200s will be a single line of text that looks like this:
20 20  
21 21  {{{XXX195G0100010034864 2 }}}
22 22  
23 23  corresponding to site XXX19,
24 24   network 5G,
25 - sample rate 0100, (i.e. 100 Hz)
25 + sample rate 0100, (e.g. 100 hz)
26 26   "gps interval" 01 (once per hour~-~- don't change),
27 27   start mode (always 0),
28 28   stop mode (always 0),
29 - seismometer type (3 = broadband (+/- 20V), 2 = Guralp (+/- 10V), 1 = shortperiod (+/- 5V),
29 + seismometer type (3 = broadband (+/- 20V), 1 = shortperiod (+/- 5V),
30 30   and seismometer serial number (4864).
31 + the 2 at the very end is for "start recording on power"
32 + and is vital to have this set so the logger will resume recording on its own if it experiences a power cycle. (# of blank spaces before this doesn't matter)
31 31  
32 -(% class="box warningmessage" %)
33 -(((
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)
35 -)))
34 +the TSAWRs are a bit shorter as they don't have an option to set the "gps sync"
36 36  
37 -=== The format for TSAWR loggers is shorter: ===
36 +{{{SITE1XX02500039999 2}}}
38 38  
39 -(% class="box errormessage" %)
40 -(((
41 -**NOTE: The format is shorter as they don't have an option to set the "GPS sync". The GPS sync number should be omitted otherwise the formatting will not work!**
42 -)))
38 +which would set up a Trillium Compact with serial 9999 named XX.SITE1 at 250hz sample rate.
43 43  
44 -SITE15G02500039999 2
45 45  
46 -corresponding to site SITE1, 
47 -
48 - network 5G
49 - sample rate 0250, (i.e. 250 Hz)
50 - start mode (always 0),
51 - stop mode (always 0),
52 - seismometer type (3 = broadband (+/- 20V), 2 = Guralp (+/- 10V), 1 = shortperiod (+/- 5V),
53 - and seismometer serial number (9999).
54 -
55 -
56 -=== The formatting process using the logger: ===
57 -
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 -
60 -[[image:original_0747763c-e3dd-4667-b897-833f12c8e0b8_20241219_130604.jpg||height="240" width="298"]]
61 -
62 62  Here is a general guideline for how much data you can expect to fit on a card:
63 63  
64 64  {{{ 64Gb card: 245 days @ 250hz or 610 days @ 100hz
65 - 32Gb card: 122 days @ 250hz or 305 days @ 100hz
66 -}}}
44 + 32Gb card: 122 days @ 250hz or 305 days @ 100hz}}}
67 67  
68 68  
69 -= Logger Menus Overview (and setup) =
70 70  
71 -The same menus are used in both the TSAWR and LPR-200 loggers.
48 += ANU TerraSAWR (Gen 3, 2017?- current) =
72 72  
73 -== System Information ==
50 +Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
74 74  
75 -This menu provides an overview of the status of the station. Under 'Initialisation Parameters', the status of systems that are initialised upon powering on the logger can be checked.
52 +== Sub-paragraph ==
76 76  
77 -This menu also displays the firmware version, battery, external, and solar voltages, and the temperature of the system.
54 +XXXX
78 78  
79 -* Check all Initialisation Parameters are marked as successful.
80 -* Check that solar voltage is above 10 V, otherwise the station will not last long.
56 +== Sub-paragraph ==
81 81  
82 -== Live Seismometer Data ==
58 +xx
83 83  
84 -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.
60 +=== Sub-sub paragraph ===
85 85  
86 -* Check that all 3 channels are present and are producing a signal.
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 -* Common representations of poor signals include channels sloping smoothly from high values to zero, or sharp corners in the plots.
62 +x
89 89  
90 -== GPS Data ==
91 91  
92 -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.
65 += ANU LPR-200 (Gen 2, 2013 - current) =
93 93  
94 -* Check that the station is connected to satellites
67 +xx
95 95  
96 -== SD Information ==
69 +== Sub-paragraph ==
97 97  
98 -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.
71 +x
99 99  
100 -== System Configuration ==
73 +== Sub-paragraph ==
101 101  
102 -This menu is used to set the stations identifiers and parameters.
75 +x
103 103  
104 -First, the sampling rate can be chosen from a set of options (1 Hz, 10 Hz, 25 Hz, 40 Hz, 50 Hz, 100 Hz, 250 Hz, 1000 Hz).
105 105  
106 -Next, the station identifier (up to 5 characters) and the network code (2 characters) can be set.
107 -
108 -Record start and stop mode should be left to 'On Request' mode.
109 -
110 -The seismometer model and serial number (up to 10 characters) can be set. Seismometer model options include:
111 -
112 -* Trillium Compact (same for 20 and 120)
113 -* CMG - 3ESP
114 -* Guralp 40T
115 -* LE-3D Lite
116 -* Mark L4C
117 -* Mark L4
118 -
119 -Additionally, the following settings can be used in place of the seismometer model types: +/- 20V, +/- 10V, +/- 5V
120 -
121 -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.
122 -
123 -* Set the sampling rate, station identifier, and network code. Set the appropriate seismometer type. Most importantly, ensure the record on restart setting is checked.
124 -
125 -(% class="box errormessage" %)
126 -(((
127 -NOTE: Ensure the 'RECORD ON RESTART' option is marked with a cross.
128 -)))
129 -
130 -(% class="wikigeneratedid" %)
131 -[[image:original_2b83fcf5-ee5a-4375-bab1-2d738e4ffe8c_20241219_130646.jpg||height="234" width="289"]]
132 -
133 -== STA/LTA Configuration ==
134 -
135 -The Short Term Average and Long Term Average Configuration screen.. this is a relic for when people weren't recording continuously. Not advised!
136 -
137 -= LogFile Conversion Script =
138 -
139 -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]].
140 -
141 -= Instrument Response =
142 -
143 -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).
144 -
145 -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.
146 -
147 -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).
148 -
149 -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') )
150 -
151 -
152 -= ANU TerraSAWR (Gen 3, FW 3.5a, 2017?- current) =
153 -
154 -Words to describe the TSAWR would go here, if needed
155 -
156 -
157 -
158 -= ANU LPR-200 (Gen 2, FW 2.6a/2.7a, 2013 - current) =
159 -
160 -Ditto the mighty LPR!
161 -
162 -
163 163  = ANU "ANUSR" (Gen 1, 2003? - 2013?) =
164 164  
165 -This logger has been retired for a long time and has a different instrument response.
80 +x
166 166  
167 -
168 168  = References =
169 169  
170 170  * [[PDF Manual>>http://auspass.edu.au/field/LPR-200_Instruction_Manual.pdf]]
... ... @@ -180,7 +180,6 @@
180 180  )))
181 181  
182 182  
183 -
184 184  (% class="box" %)
185 185  (((
186 186  = TerraSAWR Specs =
... ... @@ -193,7 +193,7 @@
193 193  [[image:1704864886951-793.jpg]]
194 194  
195 195  |=Size (L x W x H)|30 x 25 x12cm
196 -|=Weight (with battery)| 1.9kg (2.5kg)
109 +|=Weight (with battery)| ~*~*1.9kg (2.5kg)
197 197  |=Battery|(((
198 198  Lead-acid 12v, ~~7Ah
199 199  
... ... @@ -215,7 +215,7 @@
215 215  [[image:LPR 3.jpg]]
216 216  
217 217  |=Size (L x W x H)|42 x 34 x17 cm
218 -|=Weight (no battery)|5.5 kg
131 +|=Weight (with battery)|4.9 kg (7.3 kg)
219 219  |=Battery|(((
220 220  LiFePo4 140Ah
221 221  
... ... @@ -226,3 +226,5 @@
226 226  )))
227 227  )))
228 228  )))
142 +
143 +
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