DATA_SET_DESCRIPTION |
Data Set Overview
=================
The Juno Waves EDR complete data set includes all Waves science and
housekeeping data for the entire Juno mission. This data set consists
of reformatted, uncalibrated, spectra and waveforms as well as unaltered
housekeeping packets. The reformatting operation re-assembles
measurements which were too long to fit with in a single transmission
unit to the Juno flight data system as well as decompressing data that
were transmitted in compressed form. The data for this set were
acquired from the Waves Low Frequency Receiver (LFR), High Frequency
Receivers (HFR-44, HFR-45), as well as the Digital Signal Processor's
housekeeping output. This data set is intended to preserve the
uncalibrated instrument packets and is to be used only as a last resort.
Other Waves archived data sets are designed to be complete and more
easily used. Browse images associated with the other data sets provide
a graphical search of the data included in this data set.
The primary usefulness of these data lay in preserving the inputs to
higher level calibrated data sets so that such sets may be regenerated
in the event that better calibrations become available or in the event
that mistakes are uncovered in the data processing pipelines. In either
event the Waves instrument team is intended as the user of these data,
*not* the wider scientific community.
Parameters
==========
The fundamental unit of this data set is a Waves packet. In the case
of science packets, each packet contains a single measurement along with
information required to calibrate the measurement and determine when it
was collected. Actually producing calibrated data from these raw
packets requires detailed knowledge of the Waves instrument.
Housekeeping packets are also included as these contain fine timing
information.
Processing
==========
The data included in this data set were processed by the EDR
processing pipeline as described in section 3.3 of the VOLSIS document
found under the DOCUMENTS sub-directory. In short, this pipeline
consists of programs which reassemble fragmented packets, decompress
packets and check for CRC errors.
Data
====
Products in this data set are simply described as PDS FILE objects with
minimal detached labels as no more specific PDS objects exist to define
a file consisting of variable length packets. Appendix C of the VOLSIS
outlines the data format of these raw packets and the WAVES_PACKETS
document, contained in the DOCUMENT directory, provides detailed
information.
Ancillary Data
==============
This data set is complete, though the generation of higher level
calibrated data from this raw data set requires the following additional
information:
1. Navigation and Ancillary Information Facility's SPICE toolkit
and Juno mission SPICE kernels.
2. Calibration tables supplied on this volume by the Waves
instrument team
Coordinate Systems
==================
As these are raw data they are recorded in the frame of the electric
and magnetic sensors and are not rotated into any other coordinate
system. The WAVES_INST.CAT catalog file, located in this directory,
contains a description of the detectors' orientation with respect to
the Juno spacecraft coordinate frame.
Software
========
No software is provided to view, interpret, or convert this data set.
Media/Format
============
This data set is provided to the Planetary Data System electronically
as part of a volume level 'tarball' file, though the standards for file
names, directory names and path lengths follow the guidelines provided
in the 'Planetary Data System Standards Reference', version 3.8, under
section 10.1.3, 'Specification for Files Delivered Electronically'.
The 'tarball' file contains all files for a release of this volume in a
single GNU Tar file that has then been compressed via the GNU gzip
utility. The tar file preserves the relative directory path for each
file so when unpacked the original volume directory structure is
recreated. See Section 4 of the VOLSIS for more details on the data
transfer methods.
|
CITATION_DESCRIPTION |
Kurth, W.S., and Piker C.W.,
JUNO E/J/S/SS WAVES EXPERIMENT DATA RECORDS V1.0,
JNO-E/J/SS-WAV-2-EDR-V1.0, NASA Planetary Data System, 2022,
DOI: 10.17189/1519708.
|
ABSTRACT_TEXT |
The Juno Waves EDR complete data set includes all Waves science and
housekeeping data for the entire Juno mission. This data set consists
of reformatted, uncalibrated, spectra and waveforms as well as unaltered
housekeeping packets. The reformatting operation re-assembles
measurements which were too long to fit with in a single transmission
unit to the Juno flight data system as well as decompressing data that
were transmitted in compressed form. The data for this set were
acquired from the Waves Low Frequency Receiver (LFR), High Frequency
Receivers (HFR-44, HFR-45), as well as the Digital Signal Processor's
housekeeping output. This data set is intended to preserve the
uncalibrated instrument packets and is to be used only as a last resort.
Other Waves archived data sets are designed to be complete and more
easily used. Browse images associated with the other data sets provide
a graphical search of the data included in this data set.
|