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Changes for page ANU Seismic Data Loggers

Last modified by robert on 2025/06/30 19:28
From version 31.1
edited by Jack Dent
on 2024/12/19 11:06
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
Content
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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.
... ... @@ -20,29 +20,38 @@
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), 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 -NOTE: the 2 at the very end is for "start recording on power" 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)
41 +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 35  )))
36 36  
37 -=== The format for TSAWR loggers are a bit shorter as they don't have an option to set the "gps sync" ===
44 +=== The format for TSAWR loggers is shorter: ===
38 38  
39 -SITE1XX02500039999 2
46 +(% class="box errormessage" %)
47 +(((
48 +**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!**
49 +)))
40 40  
41 -corresponding to site XX.SITE1,
51 +SITE15G02500039999 2
52 +
53 +corresponding to site SITE1, 
54 +
55 + network 5G
42 42   sample rate 0250, (i.e. 250 Hz)
43 43   start mode (always 0),
44 44   stop mode (always 0),
45 - seismometer type (3 = broadband (+/- 20V), 1 = shortperiod (+/- 5V),
59 + seismometer type (3 = broadband (+/- 20V), 2 = Guralp (+/- 10V), 1 = shortperiod (+/- 5V),
46 46   and seismometer serial number (9999).
47 47  
48 48  
... ... @@ -50,6 +50,7 @@
50 50  
51 51  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
52 52  
67 +[[image:original_0747763c-e3dd-4667-b897-833f12c8e0b8_20241219_130604.jpg||height="240" width="298"]]
53 53  
54 54  Here is a general guideline for how much data you can expect to fit on a card:
55 55  
... ... @@ -57,9 +57,21 @@
57 57   32Gb card: 122 days @ 250hz or 305 days @ 100hz
58 58  }}}
59 59  
75 +== Default Settings ==
60 60  
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 +
61 61  = Logger Menus Overview (and setup) =
62 62  
88 +The same menus are used in both the TSAWR and LPR-200 loggers.
89 +
63 63  == System Information ==
64 64  
65 65  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.
... ... @@ -66,69 +66,95 @@
66 66  
67 67  This menu also displays the firmware version, battery, external, and solar voltages, and the temperature of the system.
68 68  
69 -==== 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.
70 70  
71 -- Check all Initialisation Parameters are marked as successful
72 -
73 -{{info}}
74 -
75 -{{/info}}
76 -
77 77  == Live Seismometer Data ==
78 78  
79 79  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.
80 80  
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.
81 81  
107 +== GPS Data ==
82 82  
83 -= LogFile Conversion Script =
109 +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.
84 84  
85 -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]].
111 +* Check that the station is connected to satellites
86 86  
87 -= Instrument Response =
113 +== SD Information ==
88 88  
89 -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).
115 +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.
90 90  
91 -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.
117 +== System Configuration ==
92 92  
93 -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).
119 +This menu is used to set the stations identifiers and parameters.
94 94  
95 -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') )
121 +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).
96 96  
123 +Next, the station identifier (up to 5 characters) and the network code (2 characters) can be set.
97 97  
98 -= ANU TerraSAWR (Gen 3, FW 3.5a, 2017?- current) =
125 +Record start and stop mode should be left to 'On Request' mode.
99 99  
100 -Text here
127 +The seismometer model and serial number (up to 10 characters) can be set. Seismometer model options include:
101 101  
102 -== Sub-paragraph ==
129 +* Trillium Compact (same for 20 and 120)
130 +* CMG - 3ESP
131 +* Guralp 40T
132 +* LE-3D Lite
133 +* Mark L4C
134 +* Mark L4
103 103  
104 -XXXX
136 +Additionally, the following settings can be used in place of the seismometer model types: +/- 20V, +/- 10V, +/- 5V
105 105  
106 -== Sub-paragraph ==
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.
107 107  
108 -xx
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.
109 109  
110 -=== Sub-sub paragraph ===
142 +(% class="box errormessage" %)
143 +(((
144 +NOTE: Ensure the 'RECORD ON RESTART' option is marked with a cross.
145 +)))
111 111  
112 -x
147 +(% class="wikigeneratedid" %)
148 +[[image:original_2b83fcf5-ee5a-4375-bab1-2d738e4ffe8c_20241219_130646.jpg||height="234" width="289"]]
113 113  
150 +== STA/LTA Configuration ==
114 114  
115 -= ANU LPR-200 (Gen 2, FW 2.6a/2.7a, 2013 - current) =
152 +The Short Term Average and Long Term Average Configuration screen.. this is a relic for when people weren't recording continuously. Not advised!
116 116  
117 -Text here
154 += LogFile Conversion Script =
118 118  
119 -== Sub-paragraph ==
156 +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]].
120 120  
121 -x
158 += Instrument Response =
122 122  
123 -== Sub-paragraph ==
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).
124 124  
125 -x
162 +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.
126 126  
164 +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).
127 127  
128 -= ANU "ANUSR" (Gen 1, 2003? - 2013?) =
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') )
129 129  
130 -x
131 131  
169 += ANU TerraSAWR (Gen 3, FW 3.5a, 2017- current) =
170 +
171 +Words to describe the TSAWR would go here, if needed
172 +
173 +
174 +
175 += ANU LPR-200 (Gen 2, FW 2.6a/2.7a, 2013 - current) =
176 +
177 +Ditto the mighty LPR!
178 +
179 +
180 += ANU "ANUSR" (Gen 1, 2003? - 2012) =
181 +
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.
183 +
184 +
132 132  = References =
133 133  
134 134  * [[PDF Manual>>http://auspass.edu.au/field/LPR-200_Instruction_Manual.pdf]]
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144 144  )))
145 145  
146 146  
200 +
201 +
202 +
147 147  (% class="box" %)
148 148  (((
149 149  = TerraSAWR Specs =
... ... @@ -156,12 +156,13 @@
156 156  [[image:1704864886951-793.jpg]]
157 157  
158 158  |=Size (L x W x H)|30 x 25 x12cm
159 -|=Weight (with battery)| ~*~*1.9kg (2.5kg)
215 +|=Weight (with battery)| 1.9kg (2.5kg)
160 160  |=Battery|(((
161 -Lead-acid 12v, ~~7Ah
217 +Lead-acid 12v, ~~7-9Ah
162 162  
163 163  Rechargeable
164 164  )))
221 +|=Current Firmware|3.5a (Jan 2025)
165 165  
166 166  [[image:terrasawr battery.jpg]]
167 167  )))
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178 178  [[image:LPR 3.jpg]]
179 179  
180 180  |=Size (L x W x H)|42 x 34 x17 cm
181 -|=Weight (with battery)|4.9 kg (7.3 kg)
238 +|=Weight (no battery)|5.5 kg
182 182  |=Battery|(((
183 -LiFePo4 140Ah
240 +NOW: Any 12v battery with tab connections that will fit (ex. the same TSAWR battery)
184 184  
185 -Rechargeable
242 +DISCONTINUED: LiFePo4 140Ah Rechargeable (shown below).
186 186  )))
244 +|=Current Firmware|(((
245 +2.6a (old GPS modules) / 2.7a
187 187  
247 +Jan 2025
248 +)))
249 +
188 188  [[image:LPR battery.jpg]]
189 189  )))
190 190  )))
191 191  )))
192 -
193 -
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