The JNOWAV_1000 volume contains all available Waves instrument science data records from launch though the end of mission. Data provided on this volume are at the highest available time and frequency resolution and have been calibrated into physical units using the best calibration tables tables available at the time of publication.
Every effort has been made to assure that the data and documentation are of the best possible quality. However, mistakes are inevitable. The PPI Node of the PDS will maintain an online list of ERRATA where errors and updates are documented. Should any user of this product find an error on this volume, please report the error to the PPI Node so that the finding can be made public.
This volume, JNOWAV_1000, contains Juno Waves records from the entire mission, and will be updated as new data become available. This release, Version 25, includes all available records for spacecraft event time (SCET) dates 2011-08-05 up to, but not including, 2023-04-27T07:44:48. Calibrated values have been written into the product files, thus there is no need to transform values via software when reading the product files.
A web browser can be used to view all the data in this archive in the form of Portable Network Graphics (PNG) files which are image files of frequency-time spectrograms by navigating to the BROWSE directory and clicking on the image files provided. In most cases each pixel in the image files corresponds to an average of many measurements, either in frequency or in time. Thus the image files are a reduced resolution data set.
All data files are stored under the DATA top-level directory and are organized by data set and spacecraft event time. The DATA directory branches off into:
General information on all Waves data sets may be found in the volume software interface document (VOLSIS) in DOCUMENT/VOLSIS/INDEX.HTM.
In addition information specific to this volume is provided in PDS catalog files located in the CATALOG directory. The data sets are documented in:
Other PDS catalog files include:
Many plasma wave phenomena are easier to interpret in the presence of other particles and fields measurements. In particular knowing the local DC magnetic field is useful for determining key frequencies such as the electron cyclotron frequency and the upper and lower hybrid resonances. Since the Waves instrument does not directly measure DC fields these measurements must be obtained from another source. The recommended source is volume(s) JNOFGM_1000 from the Juno MAG instrument team. The Juno MAG volume should be available from PDS/PPI node operator.
If an un-calibrated source of these data should ever be required, the raw experiment data records (EDRs) used to generate the products on this volume may be found in the Waves Raw Products volume JNOWAV_0000. If the "as-flown" command sequences sent to the Waves instrument are ever needed these are also provided on the JNOWAV_0000 volume.
The SURVEY data are stored as ASCII text values in comma separated values files (CSV) which may by directly into many database management systems or by office productivity software. These files end in the file suffix '.CSV', and are accompanying by detached PDS label files ending in the suffix '.LBL'. The label files provide descriptions of each column of the CSV files as well as general information such as the calibration tables used to produce the product. The first 5 rows of each spreadsheet column provide a data header which include useful information such as the frequency bin center point and noise bandwidth for each channel.
The BURST data are stored as standard (IEEE 754) little-endian 32-bit floating point numbers in binary files with format definitions included in accompanying "*.LBL" text files. All required time, frequency and amplitude values needed to use the data are included within the data products themselves, though in the case of upper frequency burst files (those with the mnemonic _NBS_ in the name) the frequencies are recorded as a center value and offsets from that center value.
All documents, PDS labels, HTML and CVS files are stream format files, with a carriage return (ASCII 13) and a line feed character (ASCII 10) at the end of the record. This allows the files to be read by Android, iPhone, Linux, MacOS, and Windows systems. Many users may see an unnecessary carriage return character (^M) at the end of each line. MacOS and iPhone users may see an unnecessary line feed character (^J) at the start of each line.
PDS labels are object-oriented. The object to which the label refers (e.g., FILE, TABLE, etc.) is denoted by a statement of the form:
^object = location
in which the caret character (^, also called a pointer in this context) indicates that the object starts at the given location. For an object in the same file as the label, the location is an integer representing the starting record number or byte of the object (the first record/byte in the file is 1). For an object located outside the label file, the location denotes the name of the file containing the object, along with the starting record or byte number. For example:
^INDEX_TABLE = ("INDEX.TAB", 2)
indicates that the INDEX_TABLE object begins at record 2 of the file INDEX.TAB, in the same directory as the detached label file. Below is a list of the possible formats that use the ^object keyword.
^object = n ^object = n<BYTES> ^object = ("filename.ext",n) ^object = ("filename.ext",n<BYTES>)where
n is the starting record or byte number of the object, counting from the beginning of the file (record 1, byte 1); default is record number. <BYTES> indicates that number given is in units of bytes. filename upper-case file name. ext upper-case file extension.
Since all data are stored as calibrated values, no end-user example code is provided for reading data on this volume. The SURVEY files may be read by many common programs and the BURST files are documented well enough to allow one to create simple programs for reading their contents.
This section describes the volume structure and naming conventions. Below is a tree diagram of the volume, followed by a description of the directory function and key files in each directory.
[JNOWAV_1000] (root directory) | |- AAREADME.HTM (This file) | |- AAREADME.TXT Describes volume contents, organization, and use | |- ERRATA.TXT Describes known deficiencies or caveats in the | data on this volume. | |- VOLDESC.CAT High level description of volume contents. | |- [BROWSE] Contains PNG (Portable Network Graphics) images of | of the Survey and Burst data products on this volume. | |- [CATALOG] Information on data sets and how they are | processed and produced, on the Juno spacecraft | and mission, on the Waves instrument, on cognizant | personnel, and on references to various related | documents. | |- [DATA] Contains text and binary files of instrument | | measurements and supporting information | | constituting the primary archive products. | | | |- [WAVES_SURVEY] | | Low-resolution E-Field and B-Field spectral density | | products. | | | |- [WAVES_BURST] | High-resolution E-Field and B-Field wave amplitude | products. | |- [DOCUMENT] Volume Software | Interface Specification, and the Waves Instrument | User's Guide. | |- [EXTRAS] Bonus content not necessarily conforming to | PDS archive standards. | |- [INDEX] Listing of all volume archive products.
There is a file called ERRATA.TXT found at the root level of this volume which contains a list of known deficiencies or caveats associated with data on this volume. Any changes or errors that are found on the JNOWAV_1000 volume set can be found on the PPI Node errata Web page ( http://www.igpp.ucla.edu/cgi-bin/ditdos?errata=JNOWAV_1000).
Only through support and feedback of the users of these data can an effective errata list be maintained.
Chris Piker handles downlink operations for the Waves Instrument Operation team the University of Iowa and prepares the Waves data archive. David Gell operates the Juno Science Operations Center at the Southwest Research Institute. William Kurth is the Waves principle investigator. Jack Connerney is the MAG instrument principle investigator.
For questions or problems relating to functionality or technical details of this archive, please contact the Waves downlink operator.
Internet email@example.com Telephone (319) 335-1960 U.S. Mail Chris Piker
203 Van Allen Hall
Department of Physics and Astronomy
The University of Iowa
Iowa City, IA 52242-1479
For science or collaboration inquiries, please contact the Waves Principle investigator:
Internet firstname.lastname@example.org Telephone (319) 335-1926 U.S. Mail Dr. William Kurth
203 Van Allen Hall
Department of Physics and Astronomy
The University of Iowa
Iowa City, IA 52242-1479
For data usage inquiries regarding Juno Magnetometer data, please contact the MAG Principle investigator:
Internet Jack.Connerney@nasa.gov Telephone (301) 286-5884 U.S. Mail Dr. John E.P. Connerney
NASA/Goddard Space Flight Center
Greenbelt, MD 20771
For questions or problems gathering Juno Waves data from JSOC please contact the Juno Science Operations Center manager:
Internet email@example.com Telephone (210) 522-5559 U.S. Mail Space Sciences and Engineering, Div 15
Southwest Research Institute
PO Drawer 28510
San Antonio, TX 78228-0510
For questions or problems regarding the JNOWAV_0000, and JNOWAV_1000 volumes, please contact the PDS/PPI operator:
Internet firstname.lastname@example.org Telephone (310) 206-6073 U.S. Mail PDS Operator
c/o Dr. Raymond Walker
3845 Slichter Hall
UCLA - IGPP
Los Angeles, CA 90095-1567
For questions regarding PDS Standards or other archive volumes available from the PDS, please contact PDS Operator at the PDS Central Node (at JPL):
Internet email@example.com U.S. Mail Planetary Data System, PDS Operator
Jet Propulsion Laboratory
Mail Stop 202-101
4800 Oak Grove Dr.
Pasadena, CA 91109-8099
The PDS, the Planetary Plasma Interactions (PPI) Node, the Juno Science Operation Center (JSOC) and the Juno Waves team assume no legal liability for errors in this archive. All users are encouraged to verify the "correctness" of the data prior to submitting any publications or other work based on these data. Errors in this archive should be reported back to the Juno Waves team through the ERRATA reporting procedures described above.
All trademarks are acknowledged as the property of their respective owners. The producers and publishers of this archive do not endorse any commercial entities which may be mentioned for clarity.
These data were collected under the auspices of the Juno Project. Dr. William Kurth was the Waves Science Principal Investigator. The archiving effort at The University of Iowa was supported by Chris Piker.
This archiving effort was supported by the Planetary Plasma Interactions Node of the Planetary Data System. Assistance was provided by S. Joy of the University of California, Los Angeles, and by R. Joyner of the Jet Propulsion Laboratory.