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Changes for page ANU Seismic Data Loggers

Last modified by robert on 2025/06/27 16:42
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 44.1
edited by robert
on 2025/03/03 18:26
Change comment: There is no comment for this version

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Author
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1 -XWiki.JackD
1 +XWiki.robert
Content
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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), 1 = shortperiod (+/- 5V),
29 + seismometer type (3 = broadband (+/- 20V), 2 = Guralp (+/- 10V), 1 = shortperiod (+/- 5V),
30 30   and seismometer serial number (4864).
31 31  
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)
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 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" ===
37 +=== The format for TSAWR loggers is shorter: ===
38 38  
39 -SITE1XX02500039999 2
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 +)))
40 40  
41 -corresponding to site XX.SITE1,
44 +SITE15G02500039999 2
45 +
46 +corresponding to site SITE1, 
47 +
48 + 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),
52 + 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  
60 +[[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  
... ... @@ -60,6 +60,8 @@
60 60  
61 61  = Logger Menus Overview (and setup) =
62 62  
71 +The same menus are used in both the TSAWR and LPR-200 loggers.
72 +
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 ====
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.
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  
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.
81 81  
90 +== GPS Data ==
82 82  
83 -= LogFile Conversion Script =
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.
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]].
94 +* Check that the station is connected to satellites
86 86  
87 -= Instrument Response =
96 +== 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).
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.
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.
100 +== 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).
102 +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') )
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).
96 96  
106 +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) =
108 +Record start and stop mode should be left to 'On Request' mode.
99 99  
100 -Text here
110 +The seismometer model and serial number (up to 10 characters) can be set. Seismometer model options include:
101 101  
102 -== Sub-paragraph ==
112 +* Trillium Compact (same for 20 and 120)
113 +* CMG - 3ESP
114 +* Guralp 40T
115 +* LE-3D Lite
116 +* Mark L4C
117 +* Mark L4
103 103  
104 -XXXX
119 +Additionally, the following settings can be used in place of the seismometer model types: +/- 20V, +/- 10V, +/- 5V
105 105  
106 -== Sub-paragraph ==
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.
107 107  
108 -xx
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.
109 109  
110 -=== Sub-sub paragraph ===
125 +(% class="box errormessage" %)
126 +(((
127 +NOTE: Ensure the 'RECORD ON RESTART' option is marked with a cross.
128 +)))
111 111  
112 -x
130 +(% class="wikigeneratedid" %)
131 +[[image:original_2b83fcf5-ee5a-4375-bab1-2d738e4ffe8c_20241219_130646.jpg||height="234" width="289"]]
113 113  
133 +== STA/LTA Configuration ==
114 114  
115 -= ANU LPR-200 (Gen 2, FW 2.6a/2.7a, 2013 - current) =
135 +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
137 += LogFile Conversion Script =
118 118  
119 -== Sub-paragraph ==
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]].
120 120  
121 -x
141 += Instrument Response =
122 122  
123 -== Sub-paragraph ==
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).
124 124  
125 -x
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.
126 126  
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).
127 127  
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 +
128 128  = ANU "ANUSR" (Gen 1, 2003? - 2013?) =
129 129  
130 -x
165 +This logger has been retired for a long time and has a different instrument response.
131 131  
167 +
132 132  = References =
133 133  
134 134  * [[PDF Manual>>http://auspass.edu.au/field/LPR-200_Instruction_Manual.pdf]]
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189 189  )))
190 190  )))
191 191  )))
192 -
193 -
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