# Latest **URL:** https://openradar.discourse.group/latest.md [Latest](https://openradar.discourse.group/latest.md) · [Categories](https://openradar.discourse.group/categories.md) · [Tags](https://openradar.discourse.group/tags.md) --- ## [Welcome to Open Radar Discourse](https://openradar.discourse.group/t/welcome-to-open-radar-discourse/7)
**Author:** [@system](https://openradar.discourse.group/u/system)\ **Replies:** 0\ **Last updated:** [September 21, 2022, 12:44pm UTC](https://openradar.discourse.group/t/welcome-to-open-radar-discourse/7 "2022-09-21T12:44:48Z")
At a developer meeting held in the course of the ERAD2022 conference in Locarno, Switzerland, future plans and cross-package collaboration of the openradarscience community were intensively discussed. Bringing together … --- ## [Teaching Radar Meteorology](https://openradar.discourse.group/t/teaching-radar-meteorology/685)
**Author:** [@kmuehlbauer](https://openradar.discourse.group/u/kmuehlbauer)\ **Replies:** 0\ **Last updated:** [August 27, 2026, 8:34am UTC](https://openradar.discourse.group/t/teaching-radar-meteorology/685 "2026-08-27T08:34:39Z")
Dear Community! Greetings from ERAD 2026 in Belgrade. Today afternoon is my talk on An Interactive Radar Meteorology Lab for Active Learning From Real Radar Data to Real-Time Processing and Interpretation The whole ta… --- ## [On the use of FFTs for remapping points](https://openradar.discourse.group/t/on-the-use-of-ffts-for-remapping-points/684)
**Author:** [@scollis](https://openradar.discourse.group/u/scollis)\ **Replies:** 11\ **Last updated:** [August 25, 2026, 4:18pm UTC](https://openradar.discourse.group/t/on-the-use-of-ffts-for-remapping-points/684 "2026-08-25T16:18:34Z")
Ok,. This is, I hope, the start of a great conversation on how we can work more in the spectral space for a whole heap of features across packages. This is motivated by a conversation I had with @aladinor and @swnesbitt … --- ## [ERAD 2026 planning for abstracts and short course](https://openradar.discourse.group/t/erad-2026-planning-for-abstracts-and-short-course/669)
**Author:** [@scollis](https://openradar.discourse.group/u/scollis)\ **Replies:** 10\ **Last updated:** [August 24, 2026, 7:19am UTC](https://openradar.discourse.group/t/erad-2026-planning-for-abstracts-and-short-course/669 "2026-08-24T07:19:59Z")
Hey open radar plans. Abstract deadline for ERAD is approaching. Any thoughts on a submission that represents open radar? In addition I have been talking with the organizers about a course. keen to have folks like @kmue… --- ## [Permanent Repo for Teaching and Course work](https://openradar.discourse.group/t/permanent-repo-for-teaching-and-course-work/683)
**Author:** [@kmuehlbauer](https://openradar.discourse.group/u/kmuehlbauer)\ **Replies:** 0\ **Last updated:** [July 17, 2026, 11:57am UTC](https://openradar.discourse.group/t/permanent-repo-for-teaching-and-course-work/683 "2026-07-17T11:57:30Z")
Hello Community! While working on ERAD2026 Open Radar Science Short Course - ERAD 2026 we shortly touched this in our last open radar meeting. Over the years we created quite some teaching material in different courses… --- ## [Looking for help building a passive mmWave radar detector](https://openradar.discourse.group/t/looking-for-help-building-a-passive-mmwave-radar-detector/679)
**Author:** [@medatlas](https://openradar.discourse.group/u/medatlas)\ **Replies:** 1\ **Last updated:** [June 25, 2026, 5:29am UTC](https://openradar.discourse.group/t/looking-for-help-building-a-passive-mmwave-radar-detector/679 "2026-06-25T05:29:35Z")
I’m part of a small initiative called Waveproof that is exploring technologies that help individuals better understand the wireless sensing environment around them. We are interested in developing a passive detector tha… --- ## [Ring/ripple like signature](https://openradar.discourse.group/t/ring-ripple-like-signature/674)
**Author:** [@Joshwx](https://openradar.discourse.group/u/Joshwx)\ **Replies:** 1\ **Last updated:** [May 12, 2026, 6:20pm UTC](https://openradar.discourse.group/t/ring-ripple-like-signature/674 "2026-05-12T18:20:53Z")
Hi, I currently am using gridded level 2 radar data for a project and I am getting towards the analysis section. This weekend I noticed a ‘ring’ shaped artifact that appears like a ripple in the reflectivity pattern an… --- ## [Example of Nested PyDDA Retrieval and Domain Configuration: pydda.retrieval.get\_dd\_wind\_field\_nested](https://openradar.discourse.group/t/example-of-nested-pydda-retrieval-and-domain-configuration-pydda-retrieval-get-dd-wind-field-nested/670)
**Author:** [@imd](https://openradar.discourse.group/u/imd)\ **Replies:** 0\ **Last updated:** [March 28, 2026, 8:52pm UTC](https://openradar.discourse.group/t/example-of-nested-pydda-retrieval-and-domain-configuration-pydda-retrieval-get-dd-wind-field-nested/670 "2026-03-28T20:52:14Z")
I would like to implement a nested domain approach. I came across the function pydda.retrieval.get\_dd\_wind\_field\_nested, but I would appreciate it if you could kindly provide a simple working example demonstrating how to… --- ## [Smoothness costs in different engines](https://openradar.discourse.group/t/smoothness-costs-in-different-engines/666)
**Author:** [@SunnysChan](https://openradar.discourse.group/u/SunnysChan)\ **Replies:** 6\ **Last updated:** [March 3, 2026, 3:15am UTC](https://openradar.discourse.group/t/smoothness-costs-in-different-engines/666 "2026-03-03T03:15:14Z")
Hello, I encountered a problem on smoothness cost function when changing across scipy engine and jax engine. With the same code, simply changing the engine from scipy to jax may give very different outputs: My base case… --- ## [\[PyArt\] Weird "Enlarged" Reflectivity area and some artifacts](https://openradar.discourse.group/t/pyart-weird-enlarged-reflectivity-area-and-some-artifacts/668)
**Author:** [@gene\_cgha](https://openradar.discourse.group/u/gene_cgha)\ **Replies:** 1\ **Last updated:** [February 27, 2026, 5:18pm UTC](https://openradar.discourse.group/t/pyart-weird-enlarged-reflectivity-area-and-some-artifacts/668 "2026-02-27T17:18:30Z")
I’m currently working on visualizing a 3km CAPPI radar mosaic using pyart.map.grid\_from\_radars, and I’ve run into an issue that I’m hoping others may have encountered before. In my gridding setup, I used weighting\_funct… --- ## [Lrose-titan: Can you have more than one Rview window/session open for a particular radar?](https://openradar.discourse.group/t/lrose-titan-can-you-have-more-than-one-rview-window-session-open-for-a-particular-radar/667)
**Author:** [@frussell](https://openradar.discourse.group/u/frussell)\ **Replies:** 0\ **Last updated:** [February 26, 2026, 3:07am UTC](https://openradar.discourse.group/t/lrose-titan-can-you-have-more-than-one-rview-window-session-open-for-a-particular-radar/667 "2026-02-26T03:07:35Z")
Hi everyone, We have been unable to configure lrose-titan to have more than one Rview window/session open per radar. Does anyone know if this possible? We would like to have multiple users accessing and interacting with… --- ## [Visualizing BWER from a cross section](https://openradar.discourse.group/t/visualizing-bwer-from-a-cross-section/665)
**Author:** [@gene\_cgha](https://openradar.discourse.group/u/gene_cgha)\ **Replies:** 0\ **Last updated:** [January 26, 2026, 3:39am UTC](https://openradar.discourse.group/t/visualizing-bwer-from-a-cross-section/665 "2026-01-26T03:39:31Z")
Hi everyone, I’m currently working on radar cross-section analysis using PyArt and I’d like to ask for some guidance on how to properly choose or define the cross-section points/line when creating vertical cross section… --- ## [Dist\_beam or constant ROI](https://openradar.discourse.group/t/dist-beam-or-constant-roi/664)
**Author:** [@Joshwx](https://openradar.discourse.group/u/Joshwx)\ **Replies:** 2\ **Last updated:** [January 16, 2026, 10:34pm UTC](https://openradar.discourse.group/t/dist-beam-or-constant-roi/664 "2026-01-16T22:34:14Z")
Hi, I currently am working on a project involving 5 different radars and plotting them to a grid via grid\_from\_radars. This past week I have been trying to decide of whether using the dist\_beam function or a constant R… --- ## [Unusual masking in Radar Mosaic](https://openradar.discourse.group/t/unusual-masking-in-radar-mosaic/656)
**Author:** [@gene\_cgha](https://openradar.discourse.group/u/gene_cgha)\ **Replies:** 5\ **Last updated:** [December 6, 2025, 6:33pm UTC](https://openradar.discourse.group/t/unusual-masking-in-radar-mosaic/656 "2025-12-06T18:33:11Z")
Hi, greetings to all, I’m currently working on generating a radar mosaic that combines data from three radar sites — Baguio (S-BAG), Baler (S-BAL), and Daet (S-DAET) — using Py-ART’s grid\_from\_radars function. When I u… --- ## [Weighting between radars](https://openradar.discourse.group/t/weighting-between-radars/661)
**Author:** [@SunnysChan](https://openradar.discourse.group/u/SunnysChan)\ **Replies:** 2\ **Last updated:** [December 1, 2025, 1:52am UTC](https://openradar.discourse.group/t/weighting-between-radars/661 "2025-12-01T01:52:37Z")
I faced the same issues when retrieving winds from multiple lidars: so I write my own weightings, and while looking up the source code in order to write my own ones as close as the original one as possible. I notice… --- ## [Clarification on Choosing Master Radar and Grid Origin in PyDDA Dual-Doppler Retrievals](https://openradar.discourse.group/t/clarification-on-choosing-master-radar-and-grid-origin-in-pydda-dual-doppler-retrievals/650)
**Author:** [@imd](https://openradar.discourse.group/u/imd)\ **Replies:** 5\ **Last updated:** [November 25, 2025, 6:58pm UTC](https://openradar.discourse.group/t/clarification-on-choosing-master-radar-and-grid-origin-in-pydda-dual-doppler-retrievals/650 "2025-11-25T18:58:04Z")
Both radars have different locations. I am currently using the following code: link : Retrieving your first wind field — PyDDA 2.1.1 documentation grid\_ktlx = pyart.map.grid\_from\_radars(\[radar\_ktlx\], grid\_limits=grid\_li… --- ## [Creating a conda env with "all" radar packages](https://openradar.discourse.group/t/creating-a-conda-env-with-all-radar-packages/660)
**Author:** [@jorahu](https://openradar.discourse.group/u/jorahu)\ **Replies:** 2\ **Last updated:** [November 24, 2025, 11:24am UTC](https://openradar.discourse.group/t/creating-a-conda-env-with-all-radar-packages/660 "2025-11-24T11:24:35Z")
I have been trying to create a one single conda environment that would include wradlib, arm\_pyart, pysteps and other related packages (shapely, scipy, cartopy and so on), but have not been able to do it as the solver kee… --- ## [ERAD 2026 short course](https://openradar.discourse.group/t/erad-2026-short-course/644)
**Author:** [@scollis](https://openradar.discourse.group/u/scollis)\ **Replies:** 3\ **Last updated:** [November 20, 2025, 4:38pm UTC](https://openradar.discourse.group/t/erad-2026-short-course/644 "2025-11-20T16:38:08Z")
Good evening everyone! This topic is to start discussions on a short course at ERAD in Belgrade, Serbia in 2026. It would be great if we have some leadership from our European partners. Who knows where the US open radar … --- ## [Non-meteorological echoes using fuzzy echo classification](https://openradar.discourse.group/t/non-meteorological-echoes-using-fuzzy-echo-classification/658)
**Author:** [@NicolasChaves53](https://openradar.discourse.group/u/NicolasChaves53)\ **Replies:** 2\ **Last updated:** [November 8, 2025, 7:35pm UTC](https://openradar.discourse.group/t/non-meteorological-echoes-using-fuzzy-echo-classification/658 "2025-11-08T19:35:48Z")
Hello everyone, I am happy to start using some useful tools available in libraries such as wradlib. I am currently performing quality control on X-band radar data. For the moment, I have created cumulative beam blockag… --- ## [Average Reflectivity CAPPI odds image](https://openradar.discourse.group/t/average-reflectivity-cappi-odds-image/651)
**Author:** [@yudhanugraha89](https://openradar.discourse.group/u/yudhanugraha89)\ **Replies:** 1\ **Last updated:** [October 21, 2025, 11:27am UTC](https://openradar.discourse.group/t/average-reflectivity-cappi-odds-image/651 "2025-10-21T11:27:45Z")
Hello, I’m currently processing CAPPI radar data in the form of average reflectivity at an altitude of 3 km and radius of 200 km from .nc4 format which derived from Rainbow products. However, I’m curious as to why my CA… --- ## [Filtering and retrievals of C-band Dual-pol Radar](https://openradar.discourse.group/t/filtering-and-retrievals-of-c-band-dual-pol-radar/649)
**Author:** [@gene\_cgha](https://openradar.discourse.group/u/gene_cgha)\ **Replies:** 2\ **Last updated:** [October 16, 2025, 7:03am UTC](https://openradar.discourse.group/t/filtering-and-retrievals-of-c-band-dual-pol-radar/649 "2025-10-16T07:03:29Z")
Hi greetings. I’m currently working in some radar data, particularly in Tagaytay, Philippine’s C-band dual-pol radar. I’m trying to filter out weather echoes by following the same methodology as in the post for Swiss C-b… --- ## [Filtering gates for each field for one nc file](https://openradar.discourse.group/t/filtering-gates-for-each-field-for-one-nc-file/648)
**Author:** [@ashlee.ziegler](https://openradar.discourse.group/u/ashlee.ziegler)\ **Replies:** 2\ **Last updated:** [October 9, 2025, 5:23pm UTC](https://openradar.discourse.group/t/filtering-gates-for-each-field-for-one-nc-file/648 "2025-10-09T17:23:41Z")
Hi all, I am performing objective analysis using the Barnes2 method on some mobile radar files, including dual-pol fields like CC, Kdp, and Zdr. I was wondering if there was a way for the gate filtering to only be appli… --- ## [Pyart cloud mask hugely overestimating the cloud amount](https://openradar.discourse.group/t/pyart-cloud-mask-hugely-overestimating-the-cloud-amount/646)
**Author:** [@MohitDahliya](https://openradar.discourse.group/u/MohitDahliya)\ **Replies:** 3\ **Last updated:** [October 7, 2025, 3:24pm UTC](https://openradar.discourse.group/t/pyart-cloud-mask-hugely-overestimating-the-cloud-amount/646 "2025-10-07T15:24:10Z")
import pyart import numpy as np radar\_full = pyart.io.read(“DLI241228000230-IMD-B\_corrected.nc”) radar = radar\_full.extract\_sweeps(\\\[0\\\]) Check for masked values and get valid data statistics import numpy.ma as ma fie… --- ## [Order of radar rays in a sweep](https://openradar.discourse.group/t/order-of-radar-rays-in-a-sweep/630)
**Author:** [@guntherhaase](https://openradar.discourse.group/u/guntherhaase)\ **Replies:** 4\ **Last updated:** [September 2, 2025, 1:02pm UTC](https://openradar.discourse.group/t/order-of-radar-rays-in-a-sweep/630 "2025-09-02T13:02:35Z")
Do you know if FM301 requires a specific order of radar rays in a sweep, e.g. based on time or angle? I could find any information on this in the documentation. --- ## [How does the Py-ART function pyart.map.grid\_from\_radars() handle cases where two radars are located at different site altitudes? For example, I am working with data from a C-band radar situated at 673 m MSL and an X-band radar located at 272 m MSL](https://openradar.discourse.group/t/how-does-the-py-art-function-pyart-map-grid-from-radars-handle-cases-where-two-radars-are-located-at-different-site-altitudes-for-example-i-am-working-with-data-from-a-c-band-radar-situated-at-673-m-msl-and-an-x-band-radar-located-at-272-m-msl/643)
**Author:** [@imd](https://openradar.discourse.group/u/imd)\ **Replies:** 2\ **Last updated:** [August 28, 2025, 3:52pm UTC](https://openradar.discourse.group/t/how-does-the-py-art-function-pyart-map-grid-from-radars-handle-cases-where-two-radars-are-located-at-different-site-altitudes-for-example-i-am-working-with-data-from-a-c-band-radar-situated-at-673-m-msl-and-an-x-band-radar-located-at-272-m-msl/643 "2025-08-28T15:52:00Z")
Currently, I am gridding them separately using the following calls: #X-Band: radar\_kict #C-Band: radar\_ktlx grid\_ktlx = pyart.map.grid\_from\_radars( \[radar\_ktlx\], grid\_limits=grid\_limits, grid\_shape=grid\_shape, gat… --- ## [Producing "inverted" CAPPI maps](https://openradar.discourse.group/t/producing-inverted-cappi-maps/642)
**Author:** [@gene\_cgha](https://openradar.discourse.group/u/gene_cgha)\ **Replies:** 0\ **Last updated:** [August 28, 2025, 10:22am UTC](https://openradar.discourse.group/t/producing-inverted-cappi-maps/642 "2025-08-28T10:22:16Z")
Hi all, I’m currently working with CfRadial data and trying to generate a CAPPI of reflectivity using Py-ART. I followed the example here: Compare PPI vs CAPPI — Py-ART 2.1.0 documentation However, when plotting with c… --- ## [Different altitudes?](https://openradar.discourse.group/t/different-altitudes/641)
**Author:** [@imd](https://openradar.discourse.group/u/imd)\ **Replies:** 2\ **Last updated:** [August 27, 2025, 7:16pm UTC](https://openradar.discourse.group/t/different-altitudes/641 "2025-08-27T19:16:08Z")
How does PyDDA handle data from two radars with different altitudes? Specifically, I’m working with data from a C-band radar at 673 m MSL and an X-band radar at 272 m MSL? --- ## [Incorrect coordinates when transforming from RADOLAN to WGS84 using pyproj](https://openradar.discourse.group/t/incorrect-coordinates-when-transforming-from-radolan-to-wgs84-using-pyproj/640)
**Author:** [@milot](https://openradar.discourse.group/u/milot)\ **Replies:** 0\ **Last updated:** [August 27, 2025, 7:28am UTC](https://openradar.discourse.group/t/incorrect-coordinates-when-transforming-from-radolan-to-wgs84-using-pyproj/640 "2025-08-27T07:28:34Z")
Hello everyone, I’m trying to process DWD’s RADOLAN-RW data and display precipitation data on a map. Unfortunately, I’m getting incorrect geographic coordinates after the transformation and need help troubleshooting. M… --- ## [Weighting Function: Barnes vs Barnes2](https://openradar.discourse.group/t/weighting-function-barnes-vs-barnes2/639)
**Author:** [@ashlee.ziegler](https://openradar.discourse.group/u/ashlee.ziegler)\ **Replies:** 2\ **Last updated:** [August 25, 2025, 9:22pm UTC](https://openradar.discourse.group/t/weighting-function-barnes-vs-barnes2/639 "2025-08-25T21:22:00Z")
Hello, I am working on a project that requires me to use pyart.map.grid\_from\_radars. I was wondering what the difference between the Barnes and Barnes2 weighting functions were. Thanks! Ashlee --- ## [AMS Open Radar Short Course Projects](https://openradar.discourse.group/t/ams-open-radar-short-course-projects/638)
**Author:** [@mgrover1](https://openradar.discourse.group/u/mgrover1)\ **Replies:** 1\ **Last updated:** [August 24, 2025, 7:24pm UTC](https://openradar.discourse.group/t/ams-open-radar-short-course-projects/638 "2025-08-24T19:24:57Z")
Here is a link to the slide deck for projects! [Next page](https://openradar.discourse.group/latest.md?page=1)