Level 2 data (velocity point-measurements) - Revision history

CynthiaBluteau: Added links to rotation page

2022-03-08T16:00:26Z

Added links to rotation page

← Older revision		Revision as of 16:00, 8 March 2022
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	\| processing_level		\| processing_level
	\| Boilerplate about the content of the NetCDF group.		\| Boilerplate about the content of the NetCDF group.
	\| <blockquote>''In this group, quality-controlled and despiked velocities have been split into smaller segments for processing, and are often rotated into flow's frame of reference. Detrending may occur at this step if this wasn't completed at the previous processing level.''</blockquote>		\| <blockquote>''In this group, quality-controlled and despiked velocities have been split into smaller segments for processing, and are often [[Rotation of the velocity measurements\|rotated into flow's frame of reference]]. Detrending may occur at this step if this wasn't completed at the previous processing level.''</blockquote>
	\|-		\|-
	\| segment_length		\| segment_length
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	\|-		\|-
	\| rotation_method		\| rotation_method
	\| The basis of rotation (if performed) for the turbulence analysis. Were the velocities left in the measurement frame of reference? Was a new frame of reference defined that is more representative of the site conditions (e.g., cross-shelf or along-shelf). Were the velocities rotated over each segment (horizontal plane only i.e., vertical mean velocity was near zero)?		\| The basis of [[Rotation of the velocity measurements\|rotation]] (if performed) for the turbulence analysis. Were the velocities left in the measurement frame of reference? Was a new frame of reference defined that is more representative of the site conditions (e.g., cross-shelf or along-shelf). Were the velocities rotated over each segment (horizontal plane only i.e., vertical mean velocity was near zero)?
	\| State whether the mean vertical velocity was assumed to be zero (flat bottom), and if the rotation depended on the measured velocities or was prescribed. For example, <blockquote>''Velocities were rotated into the segment's mean velocity direction (including the contributions from vertical component)''</blockquote>		\| State whether the mean vertical velocity was assumed to be zero (flat bottom), and if the rotation depended on the measured velocities or was prescribed. For example, <blockquote>''Velocities were rotated into the segment's mean velocity direction (including the contributions from vertical component)''</blockquote>
	<blockquote>''Velocities were rotated in the horizontal plane according to the segment's mean horizontal velocity''</blockquote>		<blockquote>''Velocities were rotated in the horizontal plane according to the segment's mean horizontal velocity''</blockquote>

CynthiaBluteau: /* Variables */

2022-03-08T15:59:07Z

Variables

← Older revision		Revision as of 15:59, 8 March 2022
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	\| angle_of_rotation_from_east_to_x		\| angle_of_rotation_from_east_to_x
	\| TIME, N_VEL_COMPONENT, N_VEL_INSTRUMENT		\| TIME, N_VEL_COMPONENT, N_VEL_INSTRUMENT
	\| Rotation axis [i,j,k] in the geographical coordinates system used to rotate from the geographical to the analysis frame of reference.		\| Rotation axis [i,j,k] in the geographical coordinates system used to [[Rotation of the velocity measurements\|rotate from the geographical to the analysis frame of reference]].
	\|-		\|-
	\| ROT_ANGLE		\| ROT_ANGLE

CynthiaBluteau: /* Variables */

2022-03-08T15:58:18Z

Variables

← Older revision		Revision as of 15:58, 8 March 2022
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	analysis_frame_of_reference		analysis_frame_of_reference
	\| TIME, N_SAMPLE, N_VEL_COMPONENT, N_VEL_INSTRUMENT		\| TIME, N_SAMPLE, N_VEL_COMPONENT, N_VEL_INSTRUMENT
	\| This may be rotated in the direction of the mean flow, or left in XYZ_VEL if relying only on the vertical component when estimating <math>\varepsilon</math>. {{FontColor\|fg=red\|text=Please specify the analysis frame of reference}} in the variable attribute and/or group's attribute.		\| This may be [[Rotation of the velocity measurements\|rotated]] in the direction of the mean flow, or left in XYZ_VEL if relying only on the vertical component when estimating <math>\varepsilon</math>. {{FontColor\|fg=red\|text=Please specify the analysis frame of reference}} in the variable attribute and/or group's attribute.
	\|-		\|-
	\| UVW_VEL_FLAGS		\| UVW_VEL_FLAGS

CynthiaBluteau: /* Dimensions */

2022-03-07T15:17:00Z

Dimensions

← Older revision		Revision as of 15:17, 7 March 2022
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	\|-		\|-
	\| N_VEL_COMPONENT		\| N_VEL_COMPONENT
	\| ~~unique_identifier_for_each_velocity_component~~		\| unique_identifier_for_each_
			velocity_component
	\| N_VEL_COMPONENT		\| N_VEL_COMPONENT
	\| Maximum of 3 for u,v, w (east, north, up) velocities		\| Maximum of 3 for u,v, w (east, north, up) velocities
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	\|-		\|-
	\| N_VEL_INSTRUMENT		\| N_VEL_INSTRUMENT
	\| ~~unique_identifier_for_each_velocity_instrument~~		\| unique_identifier_for_each_
			velocity_instrument
	\| N_VEL_INSTRUMENT		\| N_VEL_INSTRUMENT
	\| Required only if storing multiple synchronized instruments in the same file		\| Required only if storing multiple synchronized instruments in the same file

CynthiaBluteau: Removed the 2nd level

2022-02-21T18:48:04Z

Removed the 2nd level

Show changes

CynthiaBluteau at 03:08, 9 January 2022

2022-01-09T03:08:55Z

← Older revision		Revision as of 03:08, 9 January 2022
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	The second processing level is separated into two NetCDF groups:		The second processing level is separated into two NetCDF groups:
	* [[Level 2 ~~quality-controlled~~ velocities (velocity point-measurements)\| Level 2 qaqc velocities]]: velocities from level 1 have now been quality-controlled and despiked. This level would contain the complete time series. For burst sampling, all observations in each individual burst would be appended together. An additional variable would be included to identify the original burst each velocity sample belonged to.		* [[Level 2 qaqc velocities (velocity point-measurements)\| Level 2 qaqc velocities]]: velocities from level 1 have now been quality-controlled and despiked. This level would contain the complete time series. For burst sampling, all observations in each individual burst would be appended together. An additional variable would be included to identify the original burst each velocity sample belonged to.
	* [[Level 2 segmented (velocity point-measurements)\| Level 2 segmented]]: velocities have now been [[Segmenting datasets\|segmented]] and [[Detrending time series\|detrended]]. Each segment is stored separately from each other, which accommodates [[Segmenting datasets\|segmenting datasets]] using an overlapping window i.e., some velocity samples can belong to more than one segment.		* [[Level 2 segmented (velocity point-measurements)\| Level 2 segmented]]: velocities have now been [[Segmenting datasets\|segmented]] and [[Detrending time series\|detrended]]. Each segment is stored separately from each other, which accommodates [[Segmenting datasets\|segmenting datasets]] using an overlapping window i.e., some velocity samples can belong to more than one segment.

CynthiaBluteau at 19:10, 15 December 2021

2021-12-15T19:10:40Z

← Older revision		Revision as of 19:10, 15 December 2021
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	Go back to the previous level: [[Level 1 data (velocity point-measurements)\|Level 1 raw]]		Go back to the previous level: [[Level 1 data (velocity point-measurements)\|Level 1 raw]]

	Go to the next level: [[Level 2 qaqc velocities (velocity point-measurements)\|Level 2 ~~quality-controlled~~ velocities]]		Go to the next level: [[Level 2 qaqc velocities (velocity point-measurements)\|Level 2 qaqc velocities]]
	[[Category:Velocity point-measurements]]		[[Category:Velocity point-measurements]]

CynthiaBluteau at 18:45, 15 December 2021

2021-12-15T18:45:27Z

← Older revision		Revision as of 18:45, 15 December 2021
Line 1:		Line 1:
	The second processing level is separated into two NetCDF groups:		The second processing level is separated into two NetCDF groups:
	* [[Level 2 quality-controlled velocities (velocity point-measurements)\| Level 2 qaqc velocities]]: velocities from level 1 have now been quality-controlled and despiked.		* [[Level 2 quality-controlled velocities (velocity point-measurements)\| Level 2 qaqc velocities]]: velocities from level 1 have now been quality-controlled and despiked. This level would contain the complete time series. For burst sampling, all observations in each individual burst would be appended together. An additional variable would be included to identify the original burst each velocity sample belonged to.
	* [[Level 2 segmented (velocity point-measurements)\| Level 2 segmented]]: velocities have now been segmented and detrended		* [[Level 2 segmented (velocity point-measurements)\| Level 2 segmented]]: velocities have now been [[Segmenting datasets\|segmented]] and [[Detrending time series\|detrended]]. Each segment is stored separately from each other, which accommodates [[Segmenting datasets\|segmenting datasets]] using an overlapping window i.e., some velocity samples can belong to more than one segment.


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CynthiaBluteau at 18:36, 15 December 2021

2021-12-15T18:36:19Z

← Older revision		Revision as of 18:36, 15 December 2021
Line 1:		Line 1:
	The second processing level is separated into two NetCDF groups:		The second processing level is separated into two NetCDF groups:
	* [[Level 2 quality-controlled velocities (velocity point-measurements)\| ~~Level2~~ qaqc velocities]]: velocities from level 1 have now been quality-controlled and despiked.		* [[Level 2 quality-controlled velocities (velocity point-measurements)\| Level 2 qaqc velocities]]: velocities from level 1 have now been quality-controlled and despiked.
	* [[Level 2 segmented (velocity point-measurements)\| ~~Level2~~ segmented]]: velocities have now been segmented and detrended		* [[Level 2 segmented (velocity point-measurements)\| Level 2 segmented]]: velocities have now been segmented and detrended

	-----		-----

CynthiaBluteau at 00:30, 15 December 2021

2021-12-15T00:30:04Z

← Older revision		Revision as of 00:30, 15 December 2021
Line 1:		Line 1:
	The second processing level is separated into two NetCDF groups:		The second processing level is separated into two NetCDF groups:
	* [[Level 2 ~~qaqc~~ velocities (velocity point-measurements)\| Level2 qaqc velocities]]: velocities from level 1 have now ~~been~~ been quality-controlled and despiked.		* [[Level 2 quality-controlled velocities (velocity point-measurements)\| Level2 qaqc velocities]]: velocities from level 1 have now been quality-controlled and despiked.
	* [[Level 2 segmented (velocity point-measurements)\| Level2 segmented]]: velocities have now been segmented and detrended		* [[Level 2 segmented (velocity point-measurements)\| Level2 segmented]]: velocities have now been segmented and detrended

Line 6:		Line 6:
	Go back to the previous level: [[Level 1 data (velocity point-measurements)\|Level 1 raw]]		Go back to the previous level: [[Level 1 data (velocity point-measurements)\|Level 1 raw]]

	Go to the next level: [[Level 2 qaqc velocities (velocity point-measurements)\|Level 2 ~~qaqc~~ velocities]]		Go to the next level: [[Level 2 qaqc velocities (velocity point-measurements)\|Level 2 quality-controlled velocities]]
	[[Category:Velocity point-measurements]]		[[Category:Velocity point-measurements]]