Difference between revisions of "Localization at the Lime Kiln acoustic observatory"
| Line 18: | Line 18: | ||
* 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 | ||
'''Lime Kiln bathymetric profile:''' | '''Lime Kiln bathymetric profile:''' | ||
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]] | ||
Revision as of 12:45, 8 August 2009
In 2009, a new hydrophone array was deployed in Lime Kiln State Park as part of the SeaSound project of The Whale Museum. 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.
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
Locations (WGS84):
Coordinates in lat/lon and UTM
- 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 link 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 bathymetric profile:
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.
