Comments (7)
Can you add a plot of Phi_dp and K_dp?
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@josephhardinee please see updated image.
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Hmm.. might be that thin slice of 2nd trip right at the receiver.. Did you hardset the system phase? Or did you let the algorithm try to find it?
BTW this is one of the issues we hope to address with CMAC2.0
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Does Kdp go negative in that ray?
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@scollis, here's the phase processing code snippet:
pdp_corr, kdp_corr = pyart.correct.phase_proc_lp(
radar, -2.0, self_const=60000.0, low_z=0.0,
high_z=55.0, min_phidp=0.01, min_ncp=0.3, min_rhv=0.7,
fzl=3900.0, overide_sys_phase=False, sys_phase=332.0,
nowrap=291, LP_solver='cylp_mp', window_len=35, proc=8,
debug=False, really_verbose=False)
@josephhardinee, no, please see the updated image for clarity. That being said, there certainly are negative pixels...
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Hmm.. interesting..
One workaround to keep you going is to set the ray to _FillValue and
then it will not be used in the gridding.. Is it badvalue from first
gate? Could you add a rayplot?
On 6/30/14, 2:45 PM, Kirk North wrote:
@scollis https://github.com/scollis, here's the phase processing
code snippet:pdp_corr, kdp_corr = pyart.correct.phase_proc_lp(
radar, -2.0, self_const=60000.0, low_z=0.0,
high_z=55.0, min_phidp=0.01, min_ncp=0.3, min_rhv=0.7,
fzl=3900.0, overide_sys_phase=False, sys_phase=332.0,
nowrap=291, LP_solver='cylp_mp', window_len=35, proc=8,
debug=False, really_verbose=False)@josephhardinee https://github.com/josephhardinee, no, please see
the updated image for clarity.—
Reply to this email directly or view it on GitHub
#176 (comment).
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@scollis, yup it's _FillValue
for the entire ray(s). The May 24th case suffered from second trip echoes much more than the other cases I've processed, so my first guess is these artifacts are linked to that. That being said, these artifacts decrease the more I lower ncp_min
towards 0, i.e. the more I allow second trip pixels in. Furthermore, I see this artifact on several tilts at different azimuths.
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Related Issues (20)
- Ensure Xradar Data Model is Consistent in Py-ART HOT 1
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- BUG: As of latest version of scipy, gaussian not imported at signal level
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- Numpy 2 compatibility HOT 14
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- BUG: PyGLPK Not Installed or Tested within Py-ART
- Composite Z bugs (issue and fix) HOT 8
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- DOC: Add a blog post on phase processing with Py-ART
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- describe the principles of a region-based algorithm using Py-ART in my paper HOT 1
- Level3 product with code 153 is not supported HOT 7
- An error occurred while reading CAPPI file:ValueError: negative dimensions are not allowed HOT 7
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- FR: Export radar file after edit HOT 4
- inadequate RHOHV values in the radar file HOT 1
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