Raw data review (QA1): Difference between revisions
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# Correlation | # Correlation | ||
# | #* minimum threshold | ||
# Echo intensity | # Echo intensity | ||
# | #* Identify false target / “fish” detection | ||
# Percent good | # Percent good | ||
# | #* applies to measurement modes with in-instrument averaging across multiple pings per ensemble | ||
# Orientation (heading, pitch, roll) and depth (if sensor installed) | # Orientation (heading, pitch, roll) and depth (if sensor installed) | ||
# | #* resolve location of observations | ||
# | #* identify factors affecting location and any periodic motion | ||
# Along beam velocity | # Along beam velocity | ||
# | #* variations in data return rate | ||
# | #* values outside the nominal measurement range for the instrument configuration | ||
# | #* evidence of phase wrapping (ambiguity velocity) in pulse-pulse coherent observations | ||
# | #* periodicity indicating waves or oscillatory motion | ||
# | #* distribution outliers | ||
# | #* burst variance spatial and temporal trends | ||
# Temperature and salinity (if sensors installed) | # Temperature and salinity (if sensors installed) | ||
# | #* indication of changes in local stratification and/or internal wave activity | ||
# Earth coordinate velocity | # Earth coordinate velocity | ||
# | #* may need to be derived from along-beam velocity | ||
# | #* bin mapping if ADCP orientation isn’t vertical | ||
# | #* error velocity from 4-beam instruments | ||
# | #* comparison with ambiguity velocity to check for possible phase wrapping | ||
# | #* burst variance spatial and temporal trends | ||
# | #* shear over observation range | ||
Return to [[ADCP structure function flow chart| ADCP Flow Chart front page]] | Return to [[ADCP structure function flow chart| ADCP Flow Chart front page]] | ||
Revision as of 22:17, 10 November 2021
Raw data review
The raw data review seeks to identify the Level 1 data that satisfies a range of quality control criteria. These may involve comparison of data between beams, between bins and over time and be informed by data from other sensors e.g. meteorological, wave or CTD sensors. Typical criteria used to identify possible bad data include:
- Correlation
- minimum threshold
- Echo intensity
- Identify false target / “fish” detection
- Percent good
- applies to measurement modes with in-instrument averaging across multiple pings per ensemble
- Orientation (heading, pitch, roll) and depth (if sensor installed)
- resolve location of observations
- identify factors affecting location and any periodic motion
- Along beam velocity
- variations in data return rate
- values outside the nominal measurement range for the instrument configuration
- evidence of phase wrapping (ambiguity velocity) in pulse-pulse coherent observations
- periodicity indicating waves or oscillatory motion
- distribution outliers
- burst variance spatial and temporal trends
- Temperature and salinity (if sensors installed)
- indication of changes in local stratification and/or internal wave activity
- Earth coordinate velocity
- may need to be derived from along-beam velocity
- bin mapping if ADCP orientation isn’t vertical
- error velocity from 4-beam instruments
- comparison with ambiguity velocity to check for possible phase wrapping
- burst variance spatial and temporal trends
- shear over observation range
Return to ADCP Flow Chart front page
