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Changes for page ANU Seismic Data Loggers

Last modified by robert on 2025/04/24 14:58
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 31.4
edited by Jack Dent
on 2024/12/19 13:04
Change comment: There is no comment for this version

Summary

Details

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Content
... ... @@ -26,23 +26,30 @@
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  
... ... @@ -60,6 +60,8 @@
60 60  
61 61  = Logger Menus Overview (and setup) =
62 62  
70 +The same menus are used in both types of loggers.
71 +
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.
... ... @@ -68,22 +68,87 @@
68 68  
69 69  ==== Upon setup ====
70 70  
71 -- Check all Initialisation Parameters are marked as successful
80 +- Check all Initialisation Parameters are marked as successful.
72 72  
73 -{{info}}
74 -
75 -{{/info}}
82 +- Check that solar voltage is above 10 V, otherwise the station will not last long.
76 76  
84 +
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  
89 +==== Upon setup ====
81 81  
91 +- Check that all 3 channels are present and are producing a signal.
82 82  
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 +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 +
102 +==== Upon setup ====
103 +
104 +- Check that the station is connected to satellites
105 +
106 +
107 +== SD Information ==
108 +
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 +
111 +
112 +== System Configuration ==
113 +
114 +This menu is used to set the stations identifiers and parameters.
115 +
116 +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).
117 +
118 +Next, the station identifier (up to 5 characters) and the network code (2 characters) can be set.
119 +
120 +Record start and stop mode should be left to 'On Request' mode.
121 +
122 +The seismometer model and serial number (up to 10 characters) can be set. Seismometer model options include:
123 +
124 +- Trillium Compact
125 +
126 +- CMG - 3ESP
127 +
128 +- Guralp 40T
129 +
130 +- LE-3D Lite
131 +
132 +- Mark L4C
133 +
134 +- Mark L4
135 +
136 +Additionally, the following settings can be used in place of the seismometer model types: +/- 20V, +/- 10V, +/- 5V
137 +
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 +
140 +==== Upon setup ====
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 +(% class="box errormessage" %)
145 +(((
146 +NOTE: Ensure the 'RECORD ON RESTART' option is marked with a cross.
147 +)))
148 +
149 +== STA/LTA Configuration ==
150 +
151 +-
152 +
153 += =
154 +
83 83  = LogFile Conversion Script =
84 84  
85 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]].
86 86  
159 += =
160 +
87 87  = Instrument Response =
88 88  
89 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).