FRACTL - Revision history

Jcdehart at 23:53, 26 January 2024

2024-01-26T23:53:24Z

Jcdehart: /* Parameter File */

2024-01-26T23:52:28Z

Parameter File

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Jcdehart: /* Radial Velocity */

2024-01-26T23:15:27Z

Radial Velocity

Jcdehart: /* Radial Velocity */

2024-01-26T23:15:13Z

Radial Velocity

Jcdehart: /* Input/Output */

2024-01-26T23:14:58Z

Input/Output

Jcdehart: /* Parameter File */

2024-01-26T23:13:44Z

Parameter File

Jcdehart at 21:50, 26 January 2024

2024-01-26T21:50:59Z

Jcdehart at 21:23, 26 January 2024

2024-01-26T21:23:29Z

Brilund: /* FRACTL Tutorial */

2020-05-29T18:08:13Z

FRACTL Tutorial

Brilund: /* FRACTL Tutorial */

2020-05-28T18:09:59Z

FRACTL Tutorial

← Older revision		Revision as of 23:53, 26 January 2024
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	The left image is that of the U-component of the wind, the center image is that of the V-component of the wind, the left image is the condition number. Notice that the analytic solution is 10 m/s for U and V, and the retrieved solution is within 1-2 m/s where the condition number is small.		The left image is that of the U-component of the wind, the center image is that of the V-component of the wind, the left image is the condition number. Notice that the analytic solution is 10 m/s for U and V, and the retrieved solution is within 1-2 m/s where the condition number is small.
−
−	~~== '''The FRACTL parameter file''' ==~~
−
−	~~To control FRACTL’s operation, there are several key parameters to be modified in order to obtain the desired output:~~
−
−	* minDbz: any values below the minimum reflectivity will be tossed out.
−	* minNcp: any values below the minimum NCP will be tossed out. Note that both NEXRAD WSR88D and NOAA P-3 tail radars do not have this variable currently, so the NCP variable can be replaced by any other variables to perform the simple quality control (QC). Both minDbz and minNcp are designed for the QC of a real-time analysis.
−	* testMode: the default test mode is MODE_ZETA. The testMode option is designed for the developers to test and debug.
−	* zGrid: specify vertical grid spacing “incr” or “min, max, incr” which represents the lowest level, the highest level, and constant spacing of the vertical level respectively.
−	* yGrid: similar as zGrid. It specifies the grid parameters in y.
−	* xGrid: similar as zGrid. It specifies the grid parameters in x.
−	* gridType: mesh is for stand-alone analysis, while mish is as a background field for SAMURAI input. For the current release, we recommend the users to use mesh for the analysis. The mish gridType is experimental and still under development.
−	* projLat0: the latitude of the reference point (0,0).
−	* projLon0: the longitude of the reference point (0,0).
−	* numNbrMax: the maximum points for the nearest neighbor algorithm to consider at each grid point.
−	* inDir: input directory for searching for files. Files will be searched for in this directory.
−	* fileRegex: regular expression to select files in inDir. If input file format is CfRadial (DORADE), specify it as “^cfrad (^swp)”.
−	* outTxt: specify the directory of a output summary file which contains verification of grid results.
−	* outNc: specify the directory of a output netCDF file which is the result of the analysis.
−	* radialName: specify the variable name of radial velocity.
−	* dbzName: specify the variable name of reflectivity.
−	* ncpName: specify the variable name of NCP. If there is no NCP variable, you can specify any other variable to perform the QC. This variable corresponds to minNcp for the threshold.
−	* uvInterp: set the wind interpolation method for u and v. The specified interpolation method will be applied before calculating the vertical velocity. The default mode is INTERP_NONE.
−
−
−	~~Descriptions of the default parameter file can be found here: '''[http://wiki.lrose.net/index.php/fractl_parameter_file FRACTL parameter file]'''.~~

@@ Line 160: / Line 160: @@
 ===== Radial Velocity =====
 <code class="terminal">
 ///////////// radialName //////////////////////////

@@ Line 160: / Line 160: @@
 ===== Radial Velocity =====
 <code class="terminal">
 ///////////// radialName //////////////////////////
@@ Line 193: / Line 182: @@
 <code class="terminal">Fractl: throwerr: radialName not found</code>
 ===== Reflectivity =====

@@ Line 102: / Line 102: @@
 <code class="terminal">
 ///////////// inDir /////////////////////////////
@@ Line 166: / Line 153: @@
 parameter not specified: -outTxt</code>
 ==== '''Variable Names''' ====

← Older revision		Revision as of 23:13, 26 January 2024
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	=== '''Parameter File''' ===		=== '''Parameter File''' ===
−	There are several key parameters to look for and modify and they are listed below in the relative order they appear in the parameter file. To ~~see~~ more parameter options, go to [http://wiki.lrose.net/index.php/FRACTL#The_FRACTL_parameter_file this section] ~~of the page~~. For a full list of parameters and their descriptions, see the [http://wiki.lrose.net/index.php/Fractl_parameter_file FRACTL parameter file]:	+	There are several key parameters to look for and modify and they are listed below in the relative order they appear in the parameter file. To view descriptions of more parameter options, go to [http://wiki.lrose.net/index.php/FRACTL#The_FRACTL_parameter_file this section]. For a full list of parameters and their descriptions, see the [http://wiki.lrose.net/index.php/Fractl_parameter_file FRACTL parameter file]:

@@ Line 407: / Line 407: @@
 The left image is that of the U-component of the wind, the center image is that of the V-component of the wind, the left image is the condition number. Notice that the analytic solution is 10 m/s for U and V, and the retrieved solution is within 1-2 m/s where the condition number is small.
-== The FRACTL parameter file ==
+== '''The FRACTL parameter file''' ==
 To control FRACTL’s operation, there are several key parameters to be modified in order to obtain the desired output:

@@ Line 1: / Line 1: @@
-= Overview =
+=== '''Overview''' ===
 FRACTL is a fast traditional solver with integrated interpolation using LROSE infrastructure, and it is able to perform both gridding and multi-Doppler synthesis for airborne radars and multiple ground-based radars. This is different than Radx2Grid which is only capable of gridding data for a single ground-based radar. FRACTL adopts both REORDER and CEDRIC programs. REORDER transforms radar data from its native coordinate system to cartesian space and the data can then be ingested into CEDRIC for synthesis. FRACTL currently accepts either CfRadial or DORADE file format. Different than Radx2Grid, FRACTL doesn’t require the CfRadial file with an aggregation of the sweeps.
@@ Line 14: / Line 14: @@
-= FRACTL Quickstart Guide =
+=== '''FRACTL Quickstart Guide''' ===
 <blockquote style="color: grey; border: solid thin gray;">
@@ Line 39: / Line 39: @@
-== Parameters ==
+=== '''Parameter File''' ===
 There are several key parameters to look for and modify and they are listed below in the relative order they appear in the parameter file. To see more parameter options, go to [http://wiki.lrose.net/index.php/FRACTL#The_FRACTL_parameter_file this section] of the page. For a full list of parameters and their descriptions, see the [http://wiki.lrose.net/index.php/Fractl_parameter_file FRACTL parameter file]:
-=== Lat/Lon Origin ===
+==== '''Lat/Lon Origin''' ====
 The origin is an arbitrarily chosen point, but should be relevant for your objective. For example, it can be the geographical center of your multi-radar domain, the physical location of a radar for a single-radar domain, or the location of a feature of interest within your dataset. The latitude and longitude of your chosen origin should be given in decimal degrees.
@@ Line 93: / Line 93: @@
-=== Input/Output ===
+==== '''Input/Output''' ====
 Within the FILES AND DIRECTORIES section of the parameter file, you must edit <code class="terminal">inDir</code> and <code class="terminal">outTxt</code>. <code class="terminal">inDir</code> refers to the input directory where you have stored your radar data, and <code class="terminal">outTxt</code> refers to the the name of the text file that will contain the verification of grid results.
@@ Line 168: / Line 168: @@
-=== Variable Names ===
+==== '''Variable Names''' ====
 You must specify the names of the following fields as they are named in the radar files: reflectivity factor, radial velocity, and normalized coherent power (NCP).
-==== Radial Velocity ====
+===== Radial Velocity =====
 <code class="terminal">
 //==============================================================
@@ Line 209: / Line 209: @@
-==== Reflectivity ====
+===== Reflectivity =====
 <code class="terminal">
 ///////////// dbzName //////////////////////////
@@ Line 234: / Line 234: @@
-==== Normalized Coherent Power ====
+===== Normalized Coherent Power =====
 <code class="terminal">
 ///////////// ncpName //////////////////////////
@@ Line 263: / Line 263: @@
 </blockquote>
-== Running FRACTL ==
+=== '''Running FRACTL''' ===
 After modifying the parameter file to your desired output analysis, type the following command to the terminal to invoke the program, calling your edited parameter file in the process:
@@ Line 270: / Line 270: @@
-== Output ==
+=== '''Output''' ===
 Your output data should be stored in a sub-directory named for the year, month, and day (yyyymmdd) and contained in a netCDF file.
-= FRACTL Tutorial =
+== '''FRACTL Tutorial''' ==
 This tutorial will look much like the [http://wiki.lrose.net/index.php/FRACTL#FRACTL_Quickstart_Guide Quickstart guide] above, but is designed for users to follow along with a very basic dataset and pre-configured parameter file.
@@ Line 330: / Line 330: @@
-== Lat/Lon Origin ==
+=== Lat/Lon Origin ===
 This dataset consists of data from two radars and the chosen origin for the output data is set as the midpoint of the straight-line distance between the two radars:
@@ Line 340: / Line 340: @@
 <code class=terminal>projLon = -94.8787;</code>
-== Input/Output ==
+=== Input/Output ===
 The input directory (the folder where your radar data are stored for ingest into FRACTL) for this tutorial is set to "input". Remember, this is the name of the existing directory that contains <code class=terminal>cfrad_analytic1.nc</code> and <code class=terminal>cfrad_analytic2.nc</code>, the input files:
@@ Line 355: / Line 355: @@
 <code class=terminal>outTxt = "fractl_verif.txt";</code>
-== Variable Names ==
+=== Variable Names ===
 Given that NEXRAD radar data is being used, the names for reflectivity, radial velocity, and normalized coherent power as they are called within NEXRAD data are specified for the following parameters:
@@ Line 407: / Line 407: @@
 The left image is that of the U-component of the wind, the center image is that of the V-component of the wind, the left image is the condition number. Notice that the analytic solution is 10 m/s for U and V, and the retrieved solution is within 1-2 m/s where the condition number is small.
-= The FRACTL parameter file =
+== The FRACTL parameter file ==
 To control FRACTL’s operation, there are several key parameters to be modified in order to obtain the desired output:

@@ Line 327: / Line 327: @@
-As previously mentioned, the parameter file that you extracted from the download has already been setup specifically for this dataset (<code class=terminal>cfrad_analytic1.nc</code> and <code class=terminal>cfrad_analytic2.nc</code>). However, in line with the Quickstart guide above, we will go through the parameters that were changed. Again, you can verify this by viewing the parameter file in VI or any other text editor.
+As previously mentioned, the FRACTL parameter file that you extracted from the download has already been setup specifically for this dataset (<code class=terminal>cfrad_analytic1.nc</code> and <code class=terminal>cfrad_analytic2.nc</code>). However, in line with the Quickstart guide above, we will list the parameters that were changed. Again, you can verify this by viewing the parameter file in VI or any other text editor. Each line provided below is taken directly from the edited FRACTL parameter file.
@@ Line 341: / Line 341: @@
 == Input/Output ==
-The input directory (the folder where your radar data is stored for ingest into FRACTL) for this tutorial is set to "input":
+The input directory (the folder where your radar data are stored for ingest into FRACTL) for this tutorial is set to "input". Remember, this is the name of the existing directory that contains <code class=terminal>cfrad_analytic1.nc</code> and <code class=terminal>cfrad_analytic2.nc</code>, the input files:

← Older revision		Revision as of 18:09, 28 May 2020
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−	[~~http~~:~~//wiki.lrose.net/images/a/a0/~~FRACTL_output.png ~~FRACTL Output~~]	+	[[File:FRACTL_output.png]]