Closed westzhicanchen closed 2 years ago
@westzhicanchen Thanks for the heads up, I'll take a look. Instrument parameters should populate, so i'll see if something is going wrong in the reader using those example files. I believe for radar_parameters, it seems those are being combined into instrument parameters for other readers: https://github.com/ARM-DOE/pyart/blob/f923551e1fd8de72c8db6c76e6bc9913bf635644/pyart/io/uf.py#L248 not seeing it in the nexrad reader itself, I'll do more digging
While the core data model in Py-ART is based on CfRadial, not all of the files we read are CfRadial and follow this convention (ex. NEXRAD's data format). The NEXRAD data format is a collection of individual messages, which we parse in the reader written in Py-ART, extracting what instrument parameters are available (ex. nyquist velocity).
Taking a look at the NEXRAD data documentation, I do not see these radar parameter fields as one of the fields within the messages. This might be more of a question for the data provider (NOAA).
Hi everyone,
Thank you all for the quick and detailed response. Any chance you would recommend some person/link that I might find useful when reaching out to the data provider NOAA and asking about this?
You can find the contact us section on the NCEI website, where they listed this email ncei.info@noaa.gov
Hi everyone,
I'm using PyART to analyze NEXRAD level II data but I couldn't find some parameters that I need. Could anyone pitch in here on how to find the value of these parameters? This issue seems consistent since I dug into multiple data and none of them have those parameters.
The parameters missing are _instrumentparameters and _radarparameters. They are defined in CF/Radial data file format as the following:
When I take a look at the NEXRAD level II data using Pyart and one example dataset as the following, here is what I get with regard to these two parameters:
As we see here, only limited parameters (i.e., unambiguous range and Nyquist velocity) are available from _instrumentparameters, and no parameter is available from _radarparameters, any thoughts on where I might find them?