Concept
Chirp
| URI | http://vocab.nerc.ac.uk/collection/L05/current/CHRP/ | ||
|---|---|---|---|
| Within Vocab | SeaDataNet device categories | ||
| Alternative Labels | |||
| Definition | Chirp systems emit a 'swept-frequency signal', meaning that the transmitted signal is emitted over a period of time and over a set range of frequencies. This repeatable (transmitted) waveform can be varied in terms of pulse length, frequency bandwidth, and phase/amplitude. A matched filter, or correlation process, collapses the swept frequency modulated (FM) received signal into a pulse of short duration, maximizing the signal-to-noise-ratio. The reflected signal is received by a tuned transducer array that generates the outgoing acoustic energy. Chirps operate within a range of 400Hz - 24 kHz and are used for the first 20-30 metres of unconsolidated sediments. | ||
| Date | 2010-10-18T13:23:56 | ||
| Identifier | SDN:L05::CHRP | ||
| Note | accepted | ||
| Has Current Version | 1 | ||
| version | 1 | ||
| inScheme | http://vocab.nerc.ac.uk/scheme/SDNDEV/current/ | ||
| Broader | L19:SDNKG01 |
instrument | Mapping: 243509 |
W06:CLSS0002 |
Instrument type | Mapping: 876881 | |
L21:ICAT07 |
SeaDataNet seismic source types | Mapping: 191701 | |
| Narrower | W01:003 |
SeaDataNet device category | Mapping: 544143 |
| L22 SeaVoX Device Catalogue - (7) | |||
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