Hi Ferret users,
I would like to mask a variable (say, temp) of the Argo float data using
a quality flag that is stored in a character variable "temp_qc".
In other words, I want to assign temp to a missing value if temp_qc is not one of 1, 2, or 5.
The problem is that I do not know how to handle the character variable
(temp_qc) to mask the temp variable.
I fetched the ARGO float data files from http://www.usgodae.org/cgi-bin/argo_select.pl .
One of those nc files (2900622_profile.nc) is attached for your reference, and detailed info is given in PS.
Any idea or comment would be appreciated.
Thanks in advance.
Chan Joo
PS) Followings are some info of the Argo file that I am working on.
yes? use/order=zt 2900622_prof.nc
yes? list temp_qc
VARIABLE : quality flag
FILENAME : 2900622_prof.nc
SUBSET : 11 points (Z)
1 / 1:"11111111111111111111111111111111111111111111111 "
2 / 2:"111111111111111111111111111111111111111111111111"
3 / 3:"111111111111111111111111111111111111111111111111"
4 / 4:"111111111111111111111111111111111111111111111111"
5 / 5:"111111111111111111111111111111111111111111 "
6 / 6:"1111111144111111111111111111111 "
7 / 7:"1111111111111111111111111411111111111111111111 "
8 / 8:"1111111111111111111111111111111 "
9 / 9:"111111111 "
10 / 10:"11111 "
11 / 11:"11
yes? sh da
currently SET data sets:
1> ./2900622_prof.nc (default)
name title I J K L
DATA_TYPE
... ... ... ...
FORMAT_VERSION
... ... ... ...
HANDBOOK_VERSION
... ... ... ...
REFERENCE_DATE_TIME
... ... ... ...
PLATFORM_NUMBER
Float unique identifier ... ... 1:11 ...
PROJECT_NAME
... ... 1:11 ...
PI_NAME ... ... 1:11 ...
STATION_PARAMETERS
List of available parameters fo ... ... 1:3 1:11
CYCLE_NUMBER
Float cycle number ... ... 1:11 ...
DIRECTION
Direction of the station profil ... ... ... ...
DATA_CENTRE
Data centre in charge of float ... ... 1:11 ...
DATE_CREATION
... ... ... ...
DATE_UPDATE
Date of update of this file ... ... ... ...
DC_REFERENCE
Station unique identifier in da ... ... 1:11 ...
DATA_STATE_INDICATOR
Degree of processing the data h ... ... 1:11 ...
DATA_MODE
Delayed mode or real time data ... ... ... ...
INST_REFERENCE
Instrument type ... ... 1:11 ...
WMO_INST_TYPE
Coded instrument type ... ... 1:11 ...
JULD Julian day (UTC) of the station ... ... 1:11 ...
JULD_QC Quality on Date and Time ... ... ... ...
JULD_LOCATION
Julian day (UTC) of the locatio ... ... 1:11 ...
LATITUDE Latitude of the station, best e ... ... 1:11 ...
LONGITUDE
Longitude of the station, best ... ... 1:11 ...
POSITION_QC
Quality on position (latitude a ... ... ... ...
POSITIONING_SYSTEM
Positioning system ... ... 1:11 ...
PROFILE_PRES_QC
Global quality flag of PRES pro ... ... ... ...
PROFILE_TEMP_QC
Global quality flag of TEMP pro ... ... ... ...
PROFILE_PSAL_QC
Global quality flag of PSAL pro ... ... ... ...
PRES SEA PRESSURE ... ... 1:48 1:11
PRES_QC quality flag ... ... 1:11 ...
PRES_ADJUSTED
SEA PRESSURE ... ... 1:48 1:11
PRES_ADJUSTED_QC
quality flag ... ... 1:11 ...
PRES_ADJUSTED_ERROR
SEA PRESSURE ... ... 1:48 1:11
TEMP SEA TEMPERATURE IN SITU ITS-90 ... ... 1:48 1:11
TEMP_QC quality flag ... ... 1:11 ...
TEMP_ADJUSTED
SEA TEMPERATURE IN SITU ITS-90 ... ... 1:48 1:11
TEMP_ADJUSTED_QC
quality flag ... ... 1:11 ...
TEMP_ADJUSTED_ERROR
SEA TEMPERATURE IN SITU ITS-90 ... ... 1:48 1:11
PSAL PRACTICAL SALINITY ... ... 1:48 1:11
PSAL_QC quality flag ... ... 1:11 ...
PSAL_ADJUSTED
PRACTICAL SALINITY ... ... 1:48 1:11
PSAL_ADJUSTED_QC
quality flag ... ... 1:11 ...
PSAL_ADJUSTED_ERROR
PRACTICAL SALINITY ... ... 1:48 1:11
PARAMETER
List of parameters with calibra 1:1 ... 1:11 1:3
SCIENTIFIC_CALIB_EQUATION
Calibration equation for this p 1:1 ... 1:11 1:3
SCIENTIFIC_CALIB_COEFFICIENT
Calibration coefficients for th 1:1 ... 1:11 1:3
SCIENTIFIC_CALIB_COMMENT
Comment applying to this parame 1:1 ... 1:11 1:3
CALIBRATION_DATE
1:1 ... 1:11 1:3
HISTORY_INSTITUTION
Institution which performed act ... ... 1:11 1:0
HISTORY_STEP
Step in data processing ... ... 1:11 1:0
HISTORY_SOFTWARE
Name of software which performe ... ... 1:11 1:0
HISTORY_SOFTWARE_RELEASE
Version/release of software whi ... ... 1:11 1:0
HISTORY_REFERENCE
Reference of database ... ... 1:11 1:0
HISTORY_DATE
Date the history record was cre ... ... 1:11 1:0
HISTORY_ACTION
Action performed on data ... ... 1:11 1:0
HISTORY_PARAMETER
Station parameter action is per ... ... 1:11 1:0
HISTORY_START_PRES
Start pressure action applied o ... ... 1:11 1:0
HISTORY_STOP_PRES
Stop pressure action applied on ... ... 1:11 1:0
HISTORY_PREVIOUS_VALUE
Parameter/Flag previous value b ... ... 1:11 1:0
HISTORY_QCTEST
Documentation of tests performe ... ... 1:11 1:0
Chan Joo
--
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Chan Joo Jang, Ph.D., Assistant Research Scientist
Department of Oceanography Office Phone: 979-458-3273
3146 Texas A&M University
College Station, TX 77843-314
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--
-----------------------------------------------------
Chan Joo Jang, Ph.D., Assistant Research Scientist
Department of Oceanography Office Phone: 979-458-3273
3146 Texas A&M University
College Station, TX 77843-314
-----------------------------------------------------
Attachment:
2900622_prof.nc
Description: Binary data