Estimated Attenuation - Revision history

Jcdehart at 18:18, 25 February 2021

2021-02-25T18:18:31Z

Jcdehart at 22:37, 23 February 2021

2021-02-23T22:37:02Z

Jcdehart: /* Attenuation Correction in LROSE */

2021-02-23T22:36:44Z

Attenuation Correction in LROSE

Jcdehart: /* Overview */

2021-02-23T22:35:28Z

Overview

Jcdehart: /* Overview */

2021-02-23T22:35:14Z

Overview

Jcdehart at 22:34, 23 February 2021

2021-02-23T22:34:46Z

Jcdehart: /* Attenuation Correction in LROSE */

2021-02-23T22:34:37Z

Attenuation Correction in LROSE

Jcdehart: /* Attenuation Correction in LROSE */

2021-02-23T22:34:17Z

Attenuation Correction in LROSE

Jcdehart at 22:30, 23 February 2021

2021-02-23T22:30:46Z

Jcdehart: /* Attenuation Correction in LROSE */

2021-02-23T22:17:50Z

Attenuation Correction in LROSE

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 ===== '''Attenuation Correction in LROSE''' =====
-The default setting in LROSE is to used the temperature-averaged coefficients detailed in Table 7.1 (page 494) of [http://wiki.lrose.net/index.php/Estimating_Attenuation#References Bringi and Chandrasekar (2001)] based on the radar wavelength. The default coefficients can be overwritten in the <math>K_{DP}</math>-specific [http://wiki.lrose.net/index.php/RadxKdp#2.29_.5Bmath.5D.5Cdisplaystyle.7B_K_.7BDP.7D_.7D.5B.2Fmath.5D-specific_parameter_file parameter file], by setting ''KDP_specify_coefficients_for_attenuation_correction = TRUE''. The coefficients can then be specified in ''KDP_dbz_attenuation_coefficient'', ''KDP_dbz_attenuation_exponent'', ''KDP_zdr_attenuation_coefficient'', and ''KDP_zdr_attenuation_exponent''.
+The default setting in LROSE is to used the temperature-averaged coefficients detailed in Table 7.1 (page 494) of [http://wiki.lrose.net/index.php/Estimating_Attenuation#References Bringi and Chandrasekar (2001)] based on the radar wavelength.
 The specific usage of attenuation-corrected <math>Z_H</math> and <math>Z_{DR}</math> depends on the LROSE application.
 ====== '''RadxKdp''' ======
-If you are running RadxKdp, the attenuation-corrected fields can be saved to the output files by adding them to the 'Specifying Output Fields' section in ''output_fields'' in the main <math>K_{DP}</math> [http://wiki.lrose.net/index.php/RadxKdp#1.29_Main_parameter_file parameter file].
+If you are running RadxKdp, the attenuation-corrected fields can be saved to the output files by adding them to ''output_fields'' in the 'Specifying Output Fields' section in the main <math>K_{DP}</math> [http://wiki.lrose.net/index.php/RadxKdp#1.29_Main_parameter_file parameter file].
-The coefficients will be set according to ''KDP_specify_coefficients_for_attenuation_correction'' as described above in the <math>K_{DP}</math>-specific [http://wiki.lrose.net/index.php/RadxKdp#2.29_KDP-specific_parameter_file RadxKdp parameter file].
+The coefficients will be specified according to ''KDP_specify_coefficients_for_attenuation_correction'' as described above in the <math>K_{DP}</math>-specific [http://wiki.lrose.net/index.php/RadxKdp#2.29_KDP-specific_parameter_file RadxKdp parameter file].
 ====== '''RadxPid''' ======
 If you are running RadxPid, which estimates <math>K_{DP}</math> first, the attenuation-corrected fields can be used to determine the PID by setting ''PID_use_attenuation_corrected_fields = TRUE'' in the main PID [http://wiki.lrose.net/index.php/RadxPid#1.29_Main_parameter_file parameter file].
-The coefficients will be set according to ''KDP_specify_coefficients_for_attenuation_correction'' as described above in the <math>K_{DP}</math>-specific [http://wiki.lrose.net/index.php/RadxPid#2.29_KDP-specific_parameter_file RadxPid parameter file].
+The coefficients will be specified according to ''KDP_specify_coefficients_for_attenuation_correction'' as described above in the <math>K_{DP}</math>-specific [http://wiki.lrose.net/index.php/RadxPid#2.29_KDP-specific_parameter_file RadxPid parameter file].
 ====== '''RadxRate''' ======
-If you are running RadxRate, which estimates <math>K_{DP}</math> and then determines the PID first, the attenuation-corrected fields can be used to determine the PID by setting ''PID_use_attenuation_corrected_fields = TRUE'' and to estimate the precipitation rate by setting ''RATE_use_attenuation_corrected_fields = TRUE'' in the main Rate [http://wiki.lrose.net/index.php/RadxRate#1.29_Main_parameter_file parameter file].
+If you are running RadxRate, which estimates <math>K_{DP}</math> and then determines the PID first, the attenuation-corrected fields can be used to determine the PID by setting ''PID_use_attenuation_corrected_fields = TRUE'' and in the QPE equations by setting ''RATE_use_attenuation_corrected_fields = TRUE'' in the main Rate [http://wiki.lrose.net/index.php/RadxRate#1.29_Main_parameter_file parameter file].
-The coefficients will be set according to ''KDP_specify_coefficients_for_attenuation_correction'' as described above in the <math>K_{DP}</math>-specific [http://wiki.lrose.net/index.php/RadxRate#2.29_KDP-specific_parameter_file RadxRate parameter file].
+The coefficients will be specified according to ''KDP_specify_coefficients_for_attenuation_correction'' as described above in the <math>K_{DP}</math>-specific [http://wiki.lrose.net/index.php/RadxRate#2.29_KDP-specific_parameter_file RadxRate parameter file].
 ===== '''References''' =====
 Bringi, V. N., and V. Chandrasekar, 2001: Polarimetric Doppler Weather Radar. Principles and Applications. Cambridge University Press, 636 pp. [https://doi.org/10.1017/CBO9780511541094 Book]

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 The coefficients will be set according to ''KDP_specify_coefficients_for_attenuation_correction'' as described above in the <math>K_{DP}</math>-specific [http://wiki.lrose.net/index.php/RadxRate#2.29_KDP-specific_parameter_file RadxRate parameter file].
 ===== '''References''' =====
 Bringi, V. N., and V. Chandrasekar, 2001: Polarimetric Doppler Weather Radar. Principles and Applications. Cambridge University Press, 636 pp. [https://doi.org/10.1017/CBO9780511541094 Book]

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 If you are running RadxKdp, the attenuation-corrected fields can be saved to the output files by adding them to the 'Specifying Output Fields' section in ''output_fields'' in the main <math>K_{DP}</math> [http://wiki.lrose.net/index.php/RadxKdp#1.29_Main_parameter_file parameter file].
-The coefficients will be set according to ''KDP_specify_coefficients_for_attenuation_correction'' as described above in the <math>K_{DP}</math>-specific [http://wiki.lrose.net/index.php/RadxKdp#2.29_.5Bmath.5D.5Cdisplaystyle.7B_K_.7BDP.7D_.7D.5B.2Fmath.5D-specific_parameter_file RadxKdp parameter file].
+The coefficients will be set according to ''KDP_specify_coefficients_for_attenuation_correction'' as described above in the <math>K_{DP}</math>-specific [http://wiki.lrose.net/index.php/RadxKdp#2.29_KDP-specific_parameter_file RadxKdp parameter file].
 ====== '''RadxPid''' ======
@@ Line 26: / Line 26: @@
 The coefficients will be set according to ''KDP_specify_coefficients_for_attenuation_correction'' as described above in the <math>K_{DP}</math>-specific [http://wiki.lrose.net/index.php/RadxRate#2.29_KDP-specific_parameter_file RadxRate parameter file].
 ===== '''References''' =====
 Bringi, V. N., and V. Chandrasekar, 2001: Polarimetric Doppler Weather Radar. Principles and Applications. Cambridge University Press, 636 pp. [https://doi.org/10.1017/CBO9780511541094 Book]

← Older revision		Revision as of 22:35, 23 February 2021
Line 1:		Line 1:
	=== '''Overview''' ===		=== '''Overview''' ===
−	Attenuation of <math>Z_H</math> (<math>A_H</math>) and differential attenuation of <math>Z_{DR}</math> (<math>A_{DP}</math>) occur whenever scattering occurs, but the effects are most noticeable for radars with shorter wavelengths and when precipitation is intense. In the LROSE applications, attenuation and differential attenuation are both estimated from <math>K_{DP}</math>. The attenuation-corrected fields can ~~then~~ be ~~fed into~~ RadxPid and RadxRate.	+	Attenuation of <math>Z_H</math> (<math>A_H</math>) and differential attenuation of <math>Z_{DR}</math> (<math>A_{DP}</math>) occur whenever scattering occurs, but the effects are most noticeable for radars with shorter wavelengths and when precipitation is intense. In the LROSE applications, attenuation and differential attenuation are both estimated from <math>K_{DP}</math>. The attenuation-corrected fields can be used by both RadxPid and RadxRate.

← Older revision		Revision as of 22:35, 23 February 2021
Line 1:		Line 1:
	=== '''Overview''' ===		=== '''Overview''' ===
−	Attenuation of <math>Z_H</math> (<math>A_H</math>) and differential attenuation of <math>Z_{DR}</math> (<math>A_{DP}</math>) occur whenever scattering occurs, but the effects are most noticeable for radars with shorter wavelengths and when precipitation is intense. In the LROSE applications, attenuation and differential attenuation are both estimated from <math>K_{DP}</math> ~~values~~. The attenuation-corrected fields can then be fed into RadxPid and RadxRate.	+	Attenuation of <math>Z_H</math> (<math>A_H</math>) and differential attenuation of <math>Z_{DR}</math> (<math>A_{DP}</math>) occur whenever scattering occurs, but the effects are most noticeable for radars with shorter wavelengths and when precipitation is intense. In the LROSE applications, attenuation and differential attenuation are both estimated from <math>K_{DP}</math>. The attenuation-corrected fields can then be fed into RadxPid and RadxRate.