Level 1 data (shear probes): Difference between revisions

From Atomix
← Older edit
VisualWikitext
KikiSchulz (talk | contribs)
107 edits
mNo edit summary
Aleboyer (talk | contribs)
256 edits
Removing the link the Global NetCDF parameter page.
 
(65 intermediate revisions by 5 users not shown)
Line 1: Line 1:
== Level 1 data (shear probes) ==


Level 1 data refers to the full resolution data in physical units, e.g. the regularly sampled time series of shear. If needed, a transfer function for shear is given. Below, a table with parameters included in the level 1 data set is compiled. Numbers in the last column indicate:
: required=1 are the absolute minimum parameter required for a data set
: required=2 are preferred/recommended parameter
: required=3 are optional parameter


{| class="wikitable"
Level 1 data refers to the full resolution data in physical units, e.g. the regularly sampled time series of [[Convert the shear probe data|converted shear probe data]]. If needed, a transfer function for shear is given. Below, a table with parameters included in the level 1 data set is compiled. The data are stored as a NetCDF group with the name "L1_converted".
 
In the standard names, "sea_water" can be replaced with "water" if working in freshwater environments. This is specified in some entries below but not all.
 
 
=Dimensions=
<div class="mw-collapsible mw-expand" data-collapsetext="Collapse" data-expandtext="Expand">
<br>
 
{| class="wikitable sortable"
! Dimension !! Description
|-
|-
! Parameter Name !! CF parameter !! Standard Name !! Units of measurement !! dimension !! required
| TIME || length of the record from turbulence (fast) data channels
|-
|-
| PRES || 1<br /> 0|| sea_water_pressure<br /> water_pressure || dbar || TIME_FAST || 1,2
| TIME_*** <math>^a</math> || length of the record from slow data channels (if different from fast)
|-
|-
| TIME || 1 || time || days since 1950-01-01 00:00:00 UTC || TIME_FAST || 1
|N_SHEAR_SENSORS ||number of shear channels (shear sensors)
|-
|-
| SHEAR || 0 || water_velocity_shear || s-1 || [TIME_FAST, n_shear_sensors] || 1
|N_***_SENSORS <math>^b</math>  ||number of *** channel (sensors)
|-
|-
| VIB || 0 || platform_vibration || NA || [TIME_FAST, n_vibration_sensors] || 2
|}
<math>^a</math> Typically TIME is assumed for the fast-sampled microstructure channels. Use, e.g., TIME_SLOW or TIME_CTD for slower sampled channels such as CTD and tilt sensors. If the application requires different time stamps for different sensors, this can be utilized like TIME_PITCH, TIME_ACC etc.
<br>
<math>^b</math> Please use these examples for related sensors:<br>
N_VIB_SENSORS for vibration (piezo-acceleration) sensors, <br>
N_ACC_SENSORS for vibration acceleration sensors, <br>
N_GRADT_SENSORS for thermistors, <br>
N_GRADC_SENSORS for microconductivity sensors. <br>
</div>
 
=Variables=
<div class="mw-collapsible mw-expand" data-collapsetext="Collapse" data-expandtext="Expand">
<br>
 
{| class="wikitable sortable"
|-
! Variable Name !! Req.<math>^a</math> !! Standard Name !! Unit !! Dimensions
|-
|-
| ACC || 0 || platform_acceleration || m s-2 || [TIME_FAST, n_acc_sensors] || 2
| TIME || R || time || [http://cfconventions.org/cf-conventions/cf-conventions CF-Convention]<math>^b</math> || TIME
|-
|-
| TEMP || 1<br /> (0) || sea_water_temperature<br /> (water_temperature) || degree_Celsius || [TIME_FAST,n_T_sensors] || 2
| SHEAR || R || [sea]<math>^c</math>_water_velocity_shear || s-1 || TIME, N_SHEAR_SENSORS
|-
|-
| CNCD || 1<br /> (0) || sea_water_electrical_conductivity<br /> (water_electrical_conductivity) || S m-1 || [TIME_FAST,n_C_sensors] || 2
| PSPD_REL || HR||  platform_speed_wrt_[sea]<math>^c</math>_water || m s-1 || TIME
|-
|-
| GRADT || || temperature_gradient || || [TIME_FAST, n_gradT_sensors] || 3
| VIB || HR || platform_vibration || - || TIME, N_VIB_SENSORS
|-
|-
| GRADC || || conductivity_gradient || || [TIME_FAST, n_gradC_sensors] || 3
| PRES || HR || [sea]<math>^c</math>_water_pressure|| dbar || TIME
|-
|-
| PITCH || 1 || platform_pitch_angle || degree || [TIME_FAST] || 2
| TEMP || HR || [sea]<math>^c</math>_water_temperature || degree_Celsius || TIME, N_T_SENSORS
|-
|-
| ROLL || 1 || platform_roll_angle || degree || [TIME_FAST] || 2
| ACC || O || platform_acceleration || m s-2 || TIME, N_ACC_SENSORS
|-
| CNDC || O || [sea]<math>^c</math>_water_electrical_conductivity || S m-1 || TIME_CTD, N_C_SENSORS
|-
| GRADT || O || derivative_of_[sea]<math>^c</math>_water_temperature_wrt_<math>^{*d}</math>|| degree_Celcius m-1 || TIME, N_GRADT_SENSORS
|-
| GRADC || O || derivative_of_[sea]<math>^c</math>_water_conductivity_wrt_<math>^{*d}</math> || - || TIME, N_GRADC_SENSORS
|-
| PITCH || O || platform_pitch_angle || degree || TIME
|-
| ROLL || O || platform_roll_angle || degree || TIME
|}
|}
<math>^a</math>: Code for the requirement of variable, R: Required, HR: Highly recommended, O: Optional
<br><math>^b</math>: Unit and offset need to be compatible with the Climate and Forecast (CF)-convention
<br><math>^c</math>: User can choose between water or sea_water depending on the environment
<br><math>^d</math>: wrt_x or wrt_s; spatial derivative. Typically derived from the rate of change of temperature and divided by the profiling speed.
</div>
------
return to [[Dataset requirements for shear probes]]  <br>
go to next: [[Level 2 data (shear probes)| Level 2 data]].
[[Category: Shear probes]]

Latest revision as of 15:13, 6 June 2024


Level 1 data refers to the full resolution data in physical units, e.g. the regularly sampled time series of converted shear probe data. If needed, a transfer function for shear is given. Below, a table with parameters included in the level 1 data set is compiled. The data are stored as a NetCDF group with the name "L1_converted".

In the standard names, "sea_water" can be replaced with "water" if working in freshwater environments. This is specified in some entries below but not all.


Dimensions


Dimension Description
TIME length of the record from turbulence (fast) data channels
TIME_*** [math]\displaystyle{ ^a }[/math] length of the record from slow data channels (if different from fast)
N_SHEAR_SENSORS number of shear channels (shear sensors)
N_***_SENSORS [math]\displaystyle{ ^b }[/math] number of *** channel (sensors)

[math]\displaystyle{ ^a }[/math] Typically TIME is assumed for the fast-sampled microstructure channels. Use, e.g., TIME_SLOW or TIME_CTD for slower sampled channels such as CTD and tilt sensors. If the application requires different time stamps for different sensors, this can be utilized like TIME_PITCH, TIME_ACC etc.
[math]\displaystyle{ ^b }[/math] Please use these examples for related sensors:
N_VIB_SENSORS for vibration (piezo-acceleration) sensors,
N_ACC_SENSORS for vibration acceleration sensors,
N_GRADT_SENSORS for thermistors,
N_GRADC_SENSORS for microconductivity sensors.

Variables


Variable Name Req.[math]\displaystyle{ ^a }[/math] Standard Name Unit Dimensions
TIME R time CF-Convention[math]\displaystyle{ ^b }[/math] TIME
SHEAR R [sea][math]\displaystyle{ ^c }[/math]_water_velocity_shear s-1 TIME, N_SHEAR_SENSORS
PSPD_REL HR platform_speed_wrt_[sea][math]\displaystyle{ ^c }[/math]_water m s-1 TIME
VIB HR platform_vibration - TIME, N_VIB_SENSORS
PRES HR [sea][math]\displaystyle{ ^c }[/math]_water_pressure dbar TIME
TEMP HR [sea][math]\displaystyle{ ^c }[/math]_water_temperature degree_Celsius TIME, N_T_SENSORS
ACC O platform_acceleration m s-2 TIME, N_ACC_SENSORS
CNDC O [sea][math]\displaystyle{ ^c }[/math]_water_electrical_conductivity S m-1 TIME_CTD, N_C_SENSORS
GRADT O derivative_of_[sea][math]\displaystyle{ ^c }[/math]_water_temperature_wrt_[math]\displaystyle{ ^{*d} }[/math] degree_Celcius m-1 TIME, N_GRADT_SENSORS
GRADC O derivative_of_[sea][math]\displaystyle{ ^c }[/math]_water_conductivity_wrt_[math]\displaystyle{ ^{*d} }[/math] - TIME, N_GRADC_SENSORS
PITCH O platform_pitch_angle degree TIME
ROLL O platform_roll_angle degree TIME

[math]\displaystyle{ ^a }[/math]: Code for the requirement of variable, R: Required, HR: Highly recommended, O: Optional
[math]\displaystyle{ ^b }[/math]: Unit and offset need to be compatible with the Climate and Forecast (CF)-convention
[math]\displaystyle{ ^c }[/math]: User can choose between water or sea_water depending on the environment
[math]\displaystyle{ ^d }[/math]: wrt_x or wrt_s; spatial derivative. Typically derived from the rate of change of temperature and divided by the profiling speed.


return to Dataset requirements for shear probes
go to next: Level 2 data.

Retrieved from "http://atomix.app.uib.no/index.php?title=Level_1_data_(shear_probes)&oldid=4626"