DATA_SET_DESCRIPTION |
Data Set Overview
=================
The Juno MWR RDR data set will ultimately include all calibrated MWR
science data for the entire Juno mission. This volume will contain
only those data obtained through the cruise phase of the Juno mission,
when this phase of the mission is completed. The objective for these
data is to provide calibration for the MWR instrument; however, it is
anticipated that they may someday be useful for astrophysics. This
volume consists of calibrated data records, each of which contains all
instrumental data required for further processing. The RDR records have
a one-to-one correspondence with the EDR records. The RDR files are of
two types: Instrument Reduced Data Records (IRDRs), and Geolocation
Data Records (GRDRs). These have a one-to-one correspondence with each
other as well as with the EDR files.
These files comprise the data of primary usefulness to the wider
scientific community.
Parameters
==========
The fundamental unit of this data set comprises the data obtained
during a single 100-ms observation made by the MWR instrument. Each
observation does include all of the MWR instrument parameters required
for its calibration, which have been interpolated from neighboring
records in the original EDRs.
Processing
==========
The data included in this volume set were processed by the RDR
processing pipeline as described in section 2.3 of the VOLSIS document
found under the DOCUMENTS subdirectory. In short, this segment of the
pipeline consists of programs which interpolate the instrument
parameters in the EDR records required for the calibration of each
record, and then performs that calibration to produce the IRDRs. The
SPICE toolkit and Juno mission SPICE kernels from the Navigation and
Ancillary Information Facility (NAIF) are then used to produce the
associated GRDRs.
Data
====
Products in this data set consist of files of time-ordered data
corresponding to observations of 100-ms duration each. These are
received from the instrument in time-contiguous units of ten
observations each, with one unit then corresponding to one second's
worth of observation. Successive units may be contiguous in time (full
data rate) or separated by n seconds each (reduced data rate). These
units are then assembled into contiguous files of one hour length
regardless of data rate. Each IRDR and GRDR file has its associated
label file, which in total comprise one data record. The details of the
collection and formatting of these files is described in Sections 2 and
3, and in Appendix B, of the VOLSIS document found under the DOCUMENTS
subdirectory.
Ancillary Data
==============
This data set is complete and requires no further data to produce
calibrated antenna temperatures. However, antenna pattern knowledge is
required for use in an antenna pattern correction to produce calibrated
brightness temperatures.
Coordinate Systems
==================
Coordinate systems are consistent with those used in SPICE. The
instrument coordinant system is further described in section 2.4.6 of
the VOLSIS document found under the DOCUMENTS subdirectory. The GRDR
locations use the j2000 and galactic coordinant systems found in SPICE.
Software
========
No software is provided to view, interpret, or convert this data set.
All files are in ASCII format, however, and are readily readible
through standard programs such as textedit, Microwave Excel and Word,
etc.
Media/Format
============
This data set is provided to the Planetary Data System by the Juno
Science Operation Center (JSOC) as described in section 5.2 of the
VOLSIS document found under the DOCUMENTS subdirectory.
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