EPOXI: Instrument Temperature Measurements from Telemetry

Status: Archived

This data set contains raw temperature measurements from telemetry for the EPOXI mission from 27 sensors located in the HRII, HRIV, and MRI instruments and on the HRI and MRI telescopes, instrument platform, and solar wings of the Deep Impact flyby spacecraft. The data for this version were collected from 17 December 2007 through 31 December 2008, during the first cruise and EPOCh phases of the mission as well as the early part of the second cruise phase. Future versions of this data set will include thermal data from the remaining part of the second cruise phase and the 103P/Hartley 2 encounter phase (DIXI) of the mission.

The entire data set including catalogs, documents, indices, and supporting files can be downloaded here:

• epxtmp_0001.tgz (52 MB gzipped tar file)

A file of MD5 checksums for the download files is available here.

In case you're wondering... How to download large files What to do with a TGZ file What to do with a checksum

An overview of the volume contents is provided in the aareadme.txt file.

Catalog Files

Catalog files contain the overview information and parameters used in loading the PDS central catalog, specifically, or for developing other interfaces to the data outside of PDS. The information they contain, particularly in their descriptive text fields, should be clear, complete, and understandable to a research user who is not necessarily a mission or instrument specialist.

These files are located in the catalog/ directory. The directory contents are described by the catinfo.txt file.

• EPOXI mission file
• Deep Impact Flyby Spacecraft instrument host file
• Deep Impact High Resolution IR Spectrometer instrument file
• Deep Impact High Resolution Visible CCD instrument file
• Deep Impact Medium Resolution Visible CCD instrument file
• Data Set description file
• Target catalog files contain very brief definitions of the various TARGET_NAME values found in the PDS labels for the data:
  • Calibration
• References file
• Personnel file

Documentation Files

The current documentation for the EPOXI and Deep Impact missions has been collected into a separate volume. The root of this volume is here. The contents are described in the aareadme file in the root of the documentation volume. However some specific documents are duplicated in this data set to assist with understanding the data and processing involved. These files are located in the document/ directory. The directory contents are described by the docinfo.txt file. Please note these documents may be older versions of those found in the EPOXI and Deep Impact documentation set.

• The High Resolution IR Spectrometer, High Resolution Visible CCD, and the Medium Resolution Visible CCD are described by this draft of the Deep Impact instruments paper published in Space Science Reviews: (PDF, PDS label).
• The EPOXI data pipeline and calibration process, including some instrument descriptions and image orientation, is described by this incomplete draft of the Deep Impact instrument calibration paper published in Review of Scientific Instruments in 2008: (PDF, PDS label).
• Month/Day and Day-of-Year conversion calendars: (PDF, PDS label).

• Plots of thermal telemetry measurements from the data/ tables.

• Thermal Sensor Atlas provides an ITAR-cleared pictorial atlas that illustrates the location thermal telemetry sensors for the HRII, HRIV, and MRI instruments for EPOXI (and Deep Impact): (PDF, HTML, PDS label).

Data Files

The data/ directory contains one fixed-width ASCII table of raw thermal telemetry measurements for each sensor. Each table is described by a detached PDS data label (*.lbl). The AMMOS sensor number is included in each file name and can be used to the lookup sensor description in the Data Set description file. The data label also provides this information.

Index Files

The index/ directory contains the required PDS index of the files in the data directory, as well as the checksum file. The indxinfo.txt describes the directory contents:

• index.tab is a CSV table that identifies the location of each data file in this data set (PDS label).
• checksum.tab is a flat table of MD5 checksums for each file in this data set except for itself and its PDS label.