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Catalogue of Jupiter radio emissions identified in the Juno/Waves observations

Wednesday 24 July 2024, by Baptiste Cecconi, Corentin Louis, Philippe Zarka

This data set contains the catalogue of Jupiter radio emissions identified in the Juno/Waves observations, and published in Louis et al (2021, doi: 10.1029/2021JA029435)

A new version of this dataset is available at:https://doi.org/10.25935/awq6-gj80

Link to data repository

The data is available in TFCat format and can be loaded and processed using the TFCat python library.

How to display the catalog

To display this catalogue on top of the Juno/Waves flux density observations, we recommend using the Autoplot software (Faden et al., 2010).
Once the software is installed and the two attached files (juno-waves_flux_density.vap.zip & tfcat_juno_catalog.jyds.zip) have been downloaded and unzipped, please follow the following instructions:

  • load the juno-waves-flux_density.vap file by doing "File>Open .vap file..."
  • load the tfcat_juno_catalog.jyds file by doing "File>Add Plot From>Local File...", go to the "param" tab, select "mode":"bounds" and finally click on "overplot"
  • load the tfcat_juno_catalog.jyds file by doing "File>Add Plot From>Local File...", go to the "param" tab, select "mode":"labels" and finally click on "overplot"

Description

The data set contains the catalogue of the Jovian radio emissions identified in the Juno/Waves observations, from 2016-04-09 to 2019-06-24.

The radio components were visually identified according to their time-frequency morphology, and then manually encircled by contours and labelled using a dedicated program that records the coordinates of the contours and the label of each emission patch.

The different labels are the following:

  • QP: corresponds to Quasi-Periodcs burst emission. They often form a quasi-continuum of emission at the lowest frequencies. Therefore, they are include in a single daily contour (with a variable maximum frequency limit);
  • nLF: narrowband Low-Frequency emission;
  • nKOM: narrow-band Kilometric emission;
  • SRC: Juno inside the sources of the broadband-kilometric, hectometric and decametric emissions (based on Louis et al., 2019);
  • cal: Data used to to estimate the flux density of the Juno/Waves HFR-Low sub-receiver;
  • The satellite-induced emission were identified by comparisons with the ExPRES simulations (ExPRES Jovian Radio Emission Simulations Data Collection). These emissions are identified by a two-letter code. The 2 first letters are Io, Ga or Eu (for Io, Ganymede or Europe) and the third one is A, B, C, or D (following the usual identification of the corresponding Jovian radio source in the northern -A,B- or southern -C,D- hemisphere, and on the west -B,D- or east -A,C- limb):
    • IoA, IoB, IoC, IoD: Io-induced emissions;
    • EuA, EuB, EuC, EuD: Europa-induced emissions;
    • GaA, GaB, GaC, GaD: Ganymede-induced emissions.

The broadband-Kilometric (bKOM), Hectometric (HOM) and Decametric (DAM) components have not been explicitly catalogued because they are the most frequent emissions in their respective frequency range. They can be selected and studied by excluding all other components and restricting to the adequate frequency range. For example, excluding nKOM, nLF and QP in the range 1 kHz - 1 MHz (in practice 1 kHz - 140 kHz as the sensitivity of Waves is very low in the range 140 kHz - 3 MHz) allows to select the bKOM component only.

In the IDL saveset file, additional labels are present. Since they have not been fully confirmed, the corresponding events have not been included in the TFCat datasets.

The following Figure displays two typical 24-hour dynamic spectra of post-processed Juno/Waves data (see Juno/Waves estimated flux density Collection) with the catalogued emissions.

Example of two 24-hour dynamic spectra of processed Juno/Waves data (2017/03/29 and 2017/07/20, i.e. resp. DoY 88 and 201 of 2017). Catalogued events are indicated by the white contours and labels. The ubiquitous drifting features below 150 kHz are bKOM, emission patches and arcs not otherwise identified above 3 MHz are auroral HOM and DAM emissions
Louis et al., 2021

Acknowledgements
The MASER Jupiter radio emissions catalogue identified in the Juno/Waves observations has been created by C. Louis, P. Zarka, K. Dabidin, P.-A. Lampson, F. Magalhaes, A. Boudouma, M. Marques and B. Cecconi. The authors acknowledge the Observatoire de Paris, CNES, CNRS for funding and supporting this work and B. Kurth and the University of Iowa and the Juno/Waves team for providing access to the Juno/Waves data accessible online from PDS at https://doi.org/10.17189/1519708. The authors thank J. Faden and C. Piker for their work on the Autoplot software.

BC was also supported by PADC and EPN2024-RI. The Europlanet 2024 Research Infrastructure (EPN2024-RI) project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 871149.

Contact
Any question or request should be addressed to contact.maser@obspm.fr

References

  • Louis, C. K., Zarka, P., Dabidin, K., Lampson, P.-A., Magalhães, F. P., Boudouma, A., et al. (2021). Latitudinal Beaming of Jupiter’s Radio Emissions From Juno/Waves Flux Density Measurements. J. Geophys. Res. Space Physics, 126, 1–23. https://doi.org/10.1029/2021ja029435

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