Difference between revisions of "Localization at the Lime Kiln acoustic observatory"
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| − | In 2009, a new hydrophone array was deployed in Lime Kiln State Park | + | In 2009, a new hydrophone array was deployed in Lime Kiln State Park. Here we describe the array and track our efforts to localize sounds within it. |
The array consists of two experimental nodes: a northern one with hydrophones mounted on cement-filled tires and spaced ~8m apart; and a more rigid southern one also with 4 hydrophones, but located ~400m along-shore. The north node also hosts a Reson hydrophone that is calibrated and has a flat response over the full range of frequencies in killer whale calls, whistles, and clicks. | The array consists of two experimental nodes: a northern one with hydrophones mounted on cement-filled tires and spaced ~8m apart; and a more rigid southern one also with 4 hydrophones, but located ~400m along-shore. The north node also hosts a Reson hydrophone that is calibrated and has a flat response over the full range of frequencies in killer whale calls, whistles, and clicks. | ||
| − | + | [http://www.beamreach.org/gallery/v/User+Albums/scott/hnetwork/lkao/ Photo gallery] | [http://spreadsheets.google.com/ccc?key=tBxxtbz3b34PMkPgN4VyWwQ Admin tasks and field notes] (Google spreadsheet) | |
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| + | == Chronology == | ||
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* July 19, 2009: deployed hydrophones 3 and 4 of the north array | * July 19, 2009: deployed hydrophones 3 and 4 of the north array | ||
* July 20, 2009: secured new intertidal cable protectors | * July 20, 2009: secured new intertidal cable protectors | ||
| − | * July 25, 2009: [http://www.beamreach.org/blog/2009/07/26/north-array-at-lime-kiln deployed hydrophones 2 and 1 of north array] | + | * July 25, 2009: [http://www.beamreach.org/blog/2009/07/26/north-array-at-lime-kiln deployed hydrophones 2 and 1 of north array] (blog post) |
| + | * August 09, 2009: deployed 4 hydrophones on south array structure (slack ~13:30-14:00) | ||
| + | * August 12, 2009: localization experiments with Chuck Greene, Adam Frankel, and bioacoustics course | ||
| + | == Locations (WGS84) == | ||
| − | + | [http://www.beamreach.org/maps/scripts/lkao/ Coordinates in lat/lon and UTM] | |
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| + | [http://spreadsheets.google.com/ccc?key=tBxxtbz3b34PMkPgN4VyWwQ Array geometry worksheet] (Google spreadsheet) | ||
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| + | * North Array located (actually our estimate of element #4) ~ N 48.51571, W 123.15294 ''Remember: hydrophone 4 is closest to shore; 1 is furthest out at end of 4-element array'' (see [http://www.beamreach.org/blog/2009/07/26/north-array-at-lime-kiln July 25, 2009 blog post] for depths and bearing between hydrophones) | ||
* South Array located ~ N 48.51306, W 123.15011 | * South Array located ~ N 48.51306, W 123.15011 | ||
* Lime Kiln light house ~ N 48.51578, W 123.15261 | * Lime Kiln light house ~ N 48.51578, W 123.15261 | ||
| + | * Distance between N and S array is ~ 360.8 meters at a bearing of ~ 144.7 degrees | ||
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| + | '''Lime Kiln coastline''' | ||
| + | * [GPX file downloaded from Val's Garmin III] | ||
| + | * [Coastline track lat lon table from GPX file] | ||
| + | * [Coastline waypoints lat lon table from GPX file] | ||
| + | |||
| + | == Localization and calibration == | ||
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| + | * [http://spreadsheets.google.com/ccc?key=0AmTX6GWZhxifdHBEcG5wazhfZnpSUXR2MkVWa2NoeVE&hl=en&invite=CMLU07CI05PMYg Localization experiment metadata] (Google spreadsheet) | ||
| + | * | ||
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| + | == Lime Kiln bathymetry == | ||
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The blue line represents the average bathymetric profile off-shore of the Lime Kiln lighthouse. The red trace is the bottom from a single pass with downward looking 200kHz Biosonics echosounder. Bob Otis says that orcas typically are 100-300m offshore when they pass the lighthouse. | The blue line represents the average bathymetric profile off-shore of the Lime Kiln lighthouse. The red trace is the bottom from a single pass with downward looking 200kHz Biosonics echosounder. Bob Otis says that orcas typically are 100-300m offshore when they pass the lighthouse. | ||
[[File:LK-bathy.png]] | [[File:LK-bathy.png]] | ||
Latest revision as of 14:22, 12 July 2017
In 2009, a new hydrophone array was deployed in Lime Kiln State Park. Here we describe the array and track our efforts to localize sounds within it.
The array consists of two experimental nodes: a northern one with hydrophones mounted on cement-filled tires and spaced ~8m apart; and a more rigid southern one also with 4 hydrophones, but located ~400m along-shore. The north node also hosts a Reson hydrophone that is calibrated and has a flat response over the full range of frequencies in killer whale calls, whistles, and clicks.
Photo gallery | Admin tasks and field notes (Google spreadsheet)
Chronology
- July 19, 2009: deployed hydrophones 3 and 4 of the north array
- July 20, 2009: secured new intertidal cable protectors
- July 25, 2009: deployed hydrophones 2 and 1 of north array (blog post)
- August 09, 2009: deployed 4 hydrophones on south array structure (slack ~13:30-14:00)
- August 12, 2009: localization experiments with Chuck Greene, Adam Frankel, and bioacoustics course
Locations (WGS84)
Coordinates in lat/lon and UTM
Array geometry worksheet (Google spreadsheet)
- North Array located (actually our estimate of element #4) ~ N 48.51571, W 123.15294 Remember: hydrophone 4 is closest to shore; 1 is furthest out at end of 4-element array (see July 25, 2009 blog post for depths and bearing between hydrophones)
- South Array located ~ N 48.51306, W 123.15011
- Lime Kiln light house ~ N 48.51578, W 123.15261
- Distance between N and S array is ~ 360.8 meters at a bearing of ~ 144.7 degrees
Lime Kiln coastline
- [GPX file downloaded from Val's Garmin III]
- [Coastline track lat lon table from GPX file]
- [Coastline waypoints lat lon table from GPX file]
Localization and calibration
- Localization experiment metadata (Google spreadsheet)
Lime Kiln bathymetry
The blue line represents the average bathymetric profile off-shore of the Lime Kiln lighthouse. The red trace is the bottom from a single pass with downward looking 200kHz Biosonics echosounder. Bob Otis says that orcas typically are 100-300m offshore when they pass the lighthouse.
