# CODA **URL:** https://forum.atmospherictoolbox.org/c/coda/5.md [Latest](https://forum.atmospherictoolbox.org/latest.md) · [Categories](https://forum.atmospherictoolbox.org/categories.md) · [Tags](https://forum.atmospherictoolbox.org/tags.md) --- ## [About the CODA category](https://forum.atmospherictoolbox.org/t/about-the-coda-category/12)
**Author:** [@sander.niemeijer](https://forum.atmospherictoolbox.org/u/sander.niemeijer)\ **Replies:** 0
Discussions about the CODA software: support, examples, development ideas, etc. You can also use this category for questions/support about the CODA format definition (codadef) files that are available for various data p… --- ## [How to get attribute keys from a node?](https://forum.atmospherictoolbox.org/t/how-to-get-attribute-keys-from-a-node/937)
**Author:** [@Steven\_Compernolle](https://forum.atmospherictoolbox.org/u/Steven_Compernolle)\ **Replies:** 3\ **Last updated:** [February 23, 2026, 2:22pm UTC](https://forum.atmospherictoolbox.org/t/how-to-get-attribute-keys-from-a-node/937 "2026-02-23T14:22:19Z")
Is there a function that lists the attribute keys of a node? coda.get\_field\_names gives the node names below that node, but not the attributes. coda.get\_attributes seems to give the attribute values on the node, but … --- ## [How to apply e.g., '-1' in coda.fetch on S5P L2 products](https://forum.atmospherictoolbox.org/t/how-to-apply-e-g-1-in-coda-fetch-on-s5p-l2-products/936)
**Author:** [@Steven\_Compernolle](https://forum.atmospherictoolbox.org/u/Steven_Compernolle)\ **Replies:** 5\ **Last updated:** [January 16, 2026, 4:18pm UTC](https://forum.atmospherictoolbox.org/t/how-to-apply-e-g-1-in-coda-fetch-on-s5p-l2-products/936 "2026-01-16T16:18:27Z")
I was trying out coda.fetch on a S5P L2 file, following the documentation at CODA Python. Unfortunately I don’t fully grasp the documentation, especially the optional use of the integers and a bit the terminology. Would… --- ## [GOME2 SO2 SCD error in coda.fetch ingestion](https://forum.atmospherictoolbox.org/t/gome2-so2-scd-error-in-coda-fetch-ingestion/894)
**Author:** [@mariliza](https://forum.atmospherictoolbox.org/u/mariliza)\ **Replies:** 2\ **Last updated:** [March 18, 2025, 1:18pm UTC](https://forum.atmospherictoolbox.org/t/gome2-so2-scd-error-in-coda-fetch-ingestion/894 "2025-03-18T13:18:11Z")
Greetings Sander, I am trying to ingest a GOME-2A file GOME\_O3-SO2\_L2\_20190623230357\_050\_METOPA\_65782\_DLR\_03.HDF5 using the following: product = harp.import\_product(ffile, options = 'detailed\_results=SO2;… --- ## [Building with visual studio](https://forum.atmospherictoolbox.org/t/building-with-visual-studio/882)
**Author:** [@thomasd](https://forum.atmospherictoolbox.org/u/thomasd)\ **Replies:** 2\ **Last updated:** [January 31, 2025, 2:59pm UTC](https://forum.atmospherictoolbox.org/t/building-with-visual-studio/882 "2025-01-31T14:59:32Z")
I’d like to create a vcpkg (vcpkg - Open source C/C++ dependency manager from Microsoft) port for CODA, and therefore want to build the library using CMake and MSVC. I run into one issue: the CODA CMakeLists uses “find\_… --- ## [TROPOMI CHOCHO PAL data | ingest 3D variable with coda](https://forum.atmospherictoolbox.org/t/tropomi-chocho-pal-data-ingest-3d-variable-with-coda/864)
**Author:** [@mariliza](https://forum.atmospherictoolbox.org/u/mariliza)\ **Replies:** 7\ **Last updated:** [January 20, 2025, 6:43am UTC](https://forum.atmospherictoolbox.org/t/tropomi-chocho-pal-data-ingest-3d-variable-with-coda/864 "2025-01-20T06:43:48Z")
Good morning Sander, In the ingestion file for the S5P PAL product of CHOCHO, the fitted slant columns are not included. While it is not an official recommendation for the product, some the SCDs should be used to filter… --- ## [Coda fetch via the command line](https://forum.atmospherictoolbox.org/t/coda-fetch-via-the-command-line/874)
**Author:** [@mariliza](https://forum.atmospherictoolbox.org/u/mariliza)\ **Replies:** 4\ **Last updated:** [January 20, 2025, 6:30am UTC](https://forum.atmospherictoolbox.org/t/coda-fetch-via-the-command-line/874 "2025-01-20T06:30:27Z")
Dear Sander, Please don’t laugh, but I am wondering if one can call coda from the command line, to fetch some parameter that is not already included in the ingestion def of the GOME2\_L2\_O3MOTO — HARP 1.24 documentation … --- ## [Issue with CODA with Python](https://forum.atmospherictoolbox.org/t/issue-with-coda-with-python/403)
**Author:** [@blmadhavan](https://forum.atmospherictoolbox.org/u/blmadhavan)\ **Replies:** 3\ **Last updated:** [December 5, 2024, 9:49am UTC](https://forum.atmospherictoolbox.org/t/issue-with-coda-with-python/403 "2024-12-05T09:49:14Z")
I found a Python code for accessing the data from .DBL file in the following link: https://github.com/stcorp/coda-examples/blob/master/python/aeolus/aeolus\_l2b.py I have even downloaded the CODA definition from https:/… --- ## [CODA unsupported product file for AEOLUS](https://forum.atmospherictoolbox.org/t/coda-unsupported-product-file-for-aeolus/308)
**Author:** [@yika64](https://forum.atmospherictoolbox.org/u/yika64)\ **Replies:** 8\ **Last updated:** [June 21, 2021, 8:17am UTC](https://forum.atmospherictoolbox.org/t/coda-unsupported-product-file-for-aeolus/308 "2021-06-21T08:17:35Z")
Hi, I’m so sorry that I ask questions under very different issues! I have tried to put the codadef file into my share/coda/definitions, but it doesn’t work. It gives the same error: coda\_open(): unsupported product f… --- ## [How to get the time](https://forum.atmospherictoolbox.org/t/how-to-get-the-time/734)
**Author:** [@chen](https://forum.atmospherictoolbox.org/u/chen)\ **Replies:** 7\ **Last updated:** [January 16, 2024, 6:49am UTC](https://forum.atmospherictoolbox.org/t/how-to-get-the-time/734 "2024-01-16T06:49:47Z")
My dear I utilize coda to read the data of L2B, there is no specific time, what should I do? --- ## [Error opening SCIAMACHY files in python](https://forum.atmospherictoolbox.org/t/error-opening-sciamachy-files-in-python/558)
**Author:** [@Dhyey](https://forum.atmospherictoolbox.org/u/Dhyey)\ **Replies:** 9\ **Last updated:** [October 28, 2023, 12:35pm UTC](https://forum.atmospherictoolbox.org/t/error-opening-sciamachy-files-in-python/558 "2023-10-28T12:35:29Z")
Hi, I am trying to open SCIAMACHY Level 1b v8.0 data product having .N1 file format. I have installed coda using $ conda install -c conda-forge coda. There was no definitions directory in /$prefix/share/coda/definition… --- ## [Aeolus L2B .DBL file unable to read](https://forum.atmospherictoolbox.org/t/aeolus-l2b-dbl-file-unable-to-read/639)
**Author:** [@mmvid007](https://forum.atmospherictoolbox.org/u/mmvid007)\ **Replies:** 25\ **Last updated:** [October 9, 2023, 12:09pm UTC](https://forum.atmospherictoolbox.org/t/aeolus-l2b-dbl-file-unable-to-read/639 "2023-10-09T12:09:13Z")
after importing the CODA, while trying to extract Data I am getting the error .screenshots attached.its showing attribute error. please suggestion --- ## [How to create 2d lat/lon/altitude AEOLUS L2B from 1d lat/lon/altitude vector and plot on MATLAB with CODA?](https://forum.atmospherictoolbox.org/t/how-to-create-2d-lat-lon-altitude-aeolus-l2b-from-1d-lat-lon-altitude-vector-and-plot-on-matlab-with-coda/367)
**Author:** [@xxwillxxpel](https://forum.atmospherictoolbox.org/u/xxwillxxpel)\ **Replies:** 3\ **Last updated:** [June 25, 2023, 6:30pm UTC](https://forum.atmospherictoolbox.org/t/how-to-create-2d-lat-lon-altitude-aeolus-l2b-from-1d-lat-lon-altitude-vector-and-plot-on-matlab-with-coda/367 "2023-06-25T18:30:28Z")
My file is opened with the following code: % change this to the full path of your Aeolus L2B DBL file filename = ‘C:/Users/William Jacondino/Desktop/MATLAB AEOLUS/AE\_OPER\_ALD\_U\_N\_2B\_20200820T233235\_20200821T010323\_0001… --- ## [Trouble getting IDL to "see" coda](https://forum.atmospherictoolbox.org/t/trouble-getting-idl-to-see-coda/646)
**Author:** [@mariliza](https://forum.atmospherictoolbox.org/u/mariliza)\ **Replies:** 5\ **Last updated:** [May 12, 2023, 6:57am UTC](https://forum.atmospherictoolbox.org/t/trouble-getting-idl-to-see-coda/646 "2023-05-12T06:57:38Z")
Good morning Sander, The question relates to a linux machine with the latest harp 1.17 installed, both for use at the command line as well as via IDL/python. I wish to use coda\_open() from an IDL script, which is runni… --- ## [Unable to findout Rayleigh-clear winds and Mie-cloudy winds](https://forum.atmospherictoolbox.org/t/unable-to-findout-rayleigh-clear-winds-and-mie-cloudy-winds/645)
**Author:** [@mmvid007](https://forum.atmospherictoolbox.org/u/mmvid007)\ **Replies:** 0\ **Last updated:** [May 6, 2023, 7:38am UTC](https://forum.atmospherictoolbox.org/t/unable-to-findout-rayleigh-clear-winds-and-mie-cloudy-winds/645 "2023-05-06T07:38:48Z")
please provide details information The clear and cloudy case can be identified based upon the flag\_cloud, also validity\_flag must be True (=1). The the wind retrievals with error in wind estimate larger than 8 m/s (For… --- ## [CODA Python interferance envoriment installition](https://forum.atmospherictoolbox.org/t/coda-python-interferance-envoriment-installition/637)
**Author:** [@mmvid007](https://forum.atmospherictoolbox.org/u/mmvid007)\ **Replies:** 7\ **Last updated:** [May 1, 2023, 11:30am UTC](https://forum.atmospherictoolbox.org/t/coda-python-interferance-envoriment-installition/637 "2023-05-01T11:30:27Z")
Hello, greeting, I am using Windows 7, a 64-bit operating system, and Python 3.8.8 .for that I need a CODA interface for analyzing the Aeolus satellite Level 2, L2B wind product binary Data. I installed the latest coda … --- ## [Problem in reading AEOLUS L2B with MATLAB in windows](https://forum.atmospherictoolbox.org/t/problem-in-reading-aeolus-l2b-with-matlab-in-windows/633)
**Author:** [@RAM](https://forum.atmospherictoolbox.org/u/RAM)\ **Replies:** 8\ **Last updated:** [April 26, 2023, 10:10am UTC](https://forum.atmospherictoolbox.org/t/problem-in-reading-aeolus-l2b-with-matlab-in-windows/633 "2023-04-26T10:10:22Z")
Dear Sir, I have installed as per the instructions (https://raw.githubusercontent.com/stcorp/coda/master/INSTALL) I have also set the path for CODA in MATLAB. Still getting this error. product = coda\_open(‘AE\_OPER\_… --- ## [CODA MEX file for MATLAB](https://forum.atmospherictoolbox.org/t/coda-mex-file-for-matlab/602)
**Author:** [@Rahm](https://forum.atmospherictoolbox.org/u/Rahm)\ **Replies:** 4\ **Last updated:** [February 8, 2023, 11:43am UTC](https://forum.atmospherictoolbox.org/t/coda-mex-file-for-matlab/602 "2023-02-08T11:43:31Z")
Hi, I tried to install CODA on a Windows machine with the intent to use it to read grib files in MATLAB. I used the ‘coda-2.24-win64.msi’ route. when I try to read a grib-file I get the following error pf = coda\_open(… --- ## [Cannot read aeolus files anymore](https://forum.atmospherictoolbox.org/t/cannot-read-aeolus-files-anymore/528)
**Author:** [@HolgerB](https://forum.atmospherictoolbox.org/u/HolgerB)\ **Replies:** 8\ **Last updated:** [December 20, 2022, 2:57pm UTC](https://forum.atmospherictoolbox.org/t/cannot-read-aeolus-files-anymore/528 "2022-12-20T14:57:07Z")
Hi all, since some weeks, we (I and some of my colleagues) cannot use CODA anymore to open Aeolus files. This is valid for old Aeolus files as well which have been working before → thus, it is really strange. I am usin… --- ## [Problem in reading Aeolus satellite data in Matlab](https://forum.atmospherictoolbox.org/t/problem-in-reading-aeolus-satellite-data-in-matlab/390)
**Author:** [@mdbasha](https://forum.atmospherictoolbox.org/u/mdbasha)\ **Replies:** 7\ **Last updated:** [December 2, 2022, 8:45am UTC](https://forum.atmospherictoolbox.org/t/problem-in-reading-aeolus-satellite-data-in-matlab/390 "2022-12-02T08:45:06Z")
Dear Sir, I can’t able to read the Aeolus satellite data in Matlab after following the instruction from install file. Am getting error … ERROR : unsupported product file Error using coda\_matlab CODA Error Error in c… --- ## [CODA planned to be used for EarthCare/ATLID?](https://forum.atmospherictoolbox.org/t/coda-planned-to-be-used-for-earthcare-atlid/574)
**Author:** [@Micka](https://forum.atmospherictoolbox.org/u/Micka)\ **Replies:** 2\ **Last updated:** [October 26, 2022, 2:46pm UTC](https://forum.atmospherictoolbox.org/t/coda-planned-to-be-used-for-earthcare-atlid/574 "2022-10-26T14:46:50Z")
Hello, Do you know if CODA will be used for products from EarthCare/ATLID ? Launched expected next year. Regards --- ## [A issue with coda python(how to obtain beijing's data)](https://forum.atmospherictoolbox.org/t/a-issue-with-coda-python-how-to-obtain-beijings-data/493)
**Author:** [@huangyang](https://forum.atmospherictoolbox.org/u/huangyang)\ **Replies:** 4\ **Last updated:** [October 26, 2022, 8:24am UTC](https://forum.atmospherictoolbox.org/t/a-issue-with-coda-python-how-to-obtain-beijings-data/493 "2022-10-26T08:24:26Z")
Excuse me,I don’t know how to select latitude and longitude to obtain beijing’s data by writing code,can you give me help? Thank you! --- ## [Error opening IASI L1 native file in matlab using CODA](https://forum.atmospherictoolbox.org/t/error-opening-iasi-l1-native-file-in-matlab-using-coda/551)
**Author:** [@viv](https://forum.atmospherictoolbox.org/u/viv)\ **Replies:** 4\ **Last updated:** [August 26, 2022, 10:23pm UTC](https://forum.atmospherictoolbox.org/t/error-opening-iasi-l1-native-file-in-matlab-using-coda/551 "2022-08-26T22:23:06Z")
Hi, I am having problems when I call the function coda\_fetch for the L1 file of IASI. The function works properly for the L2 files and I can see the fields contained in the file, though for the L1 files I get this error… --- ## [Altitude of DEM](https://forum.atmospherictoolbox.org/t/altitude-of-dem/490)
**Author:** [@lajam](https://forum.atmospherictoolbox.org/u/lajam)\ **Replies:** 3\ **Last updated:** [April 9, 2022, 12:59pm UTC](https://forum.atmospherictoolbox.org/t/altitude-of-dem/490 "2022-04-09T12:59:11Z")
Dear Coda, I’m trying to extract the altitude of the DEM intersection for AEOLUS data on matlab. I’m using the following command: altitude = coda\_fetch(product\_1B, ‘geolocation’, -1, ‘observation\_geolocation/geolocatio… --- ## [I get an error when trying to open an L2B file from AEOLUS in matlab](https://forum.atmospherictoolbox.org/t/i-get-an-error-when-trying-to-open-an-l2b-file-from-aeolus-in-matlab/363)
**Author:** [@xxwillxxpel](https://forum.atmospherictoolbox.org/u/xxwillxxpel)\ **Replies:** 4\ **Last updated:** [April 8, 2022, 11:33am UTC](https://forum.atmospherictoolbox.org/t/i-get-an-error-when-trying-to-open-an-l2b-file-from-aeolus-in-matlab/363 "2022-04-08T11:33:02Z")
Can anyone tell what the problem might be? I installed everything according to the tutorial provided in the documentation but the error still persists. product = coda\_open(‘AE\_OPER\_ALD\_U\_N\_2B\_20201112T233159\_2020111… --- ## [Opening AUX EEF data](https://forum.atmospherictoolbox.org/t/opening-aux-eef-data/470)
**Author:** [@lajam](https://forum.atmospherictoolbox.org/u/lajam)\ **Replies:** 6\ **Last updated:** [February 17, 2022, 11:09am UTC](https://forum.atmospherictoolbox.org/t/opening-aux-eef-data/470 "2022-02-17T11:09:39Z")
Dear CODA, I would like to open and read auxiliary data files with the .EEF format. I didn’t find a way to open them as I don’t the names of the variables inside the files. I didn’t find any sources of info about that. … --- ## [Issue with CODA opening Aeolus processor 03.60 (B13) files](https://forum.atmospherictoolbox.org/t/issue-with-coda-opening-aeolus-processor-03-60-b13-files/453)
**Author:** [@jabrilgago](https://forum.atmospherictoolbox.org/u/jabrilgago)\ **Replies:** 2\ **Last updated:** [January 7, 2022, 4:43pm UTC](https://forum.atmospherictoolbox.org/t/issue-with-coda-opening-aeolus-processor-03-60-b13-files/453 "2022-01-07T16:43:50Z")
Hi! Recently I found out that the Aeolus files processed under the new processor version 03.60 (baseline 13, which implies a significant change in the accumulation of laser shots per measurement) can no longer be opened… --- ## [Import Error with python: "dlopen(@path/\_codac.so): Symbol not found \_PyCObject\_Type ; Referenced from: @path/\_codac.so ; Expected in: flat namespace](https://forum.atmospherictoolbox.org/t/import-error-with-python-dlopen-path-codac-so-symbol-not-found-pycobject-type-referenced-from-path-codac-so-expected-in-flat-namespace/418)
**Author:** [@quitterie](https://forum.atmospherictoolbox.org/u/quitterie)\ **Replies:** 13\ **Last updated:** [November 16, 2021, 12:07pm UTC](https://forum.atmospherictoolbox.org/t/import-error-with-python-dlopen-path-codac-so-symbol-not-found-pycobject-type-referenced-from-path-codac-so-expected-in-flat-namespace/418 "2021-11-16T12:07:38Z")
Hi, Here is the story: I am working on Mac and I had previously installed coda with python2.7 but had to switch to python 3. The python3 version working with all the installed python packages is located in @path = “/… --- ## [Type already has a conversion](https://forum.atmospherictoolbox.org/t/type-already-has-a-conversion/334)
**Author:** [@shoyu](https://forum.atmospherictoolbox.org/u/shoyu)\ **Replies:** 2\ **Last updated:** [June 5, 2021, 11:11am UTC](https://forum.atmospherictoolbox.org/t/type-already-has-a-conversion/334 "2021-06-05T11:11:30Z")
Hi, i need to open hdf4 preconverted AEOLUS data using python (as in the python example coda-examples/aux\_met\_12.py at master · stcorp/coda-examples · GitHub), but coda.open raises this error: CodacError: coda\_open(): t… --- ## [Using \_\_dict\_\_ with coda record types](https://forum.atmospherictoolbox.org/t/using-dict-with-coda-record-types/318)
**Author:** [@tuinder](https://forum.atmospherictoolbox.org/u/tuinder)\ **Replies:** 2\ **Last updated:** [May 6, 2021, 2:16pm UTC](https://forum.atmospherictoolbox.org/t/using-dict-with-coda-record-types/318 "2021-05-06T14:16:56Z")
I have existing code that uses coda that has ran in the past. Now it fails to run. Is there any reason why I can’t use dict to convert the record attributes to a dictionary? $ ipython3 Python 3.8.7 (default, Jan 20 2021… [Next page](https://forum.atmospherictoolbox.org/c/coda/5.md?page=1)