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Hayabusa Data Archives
Makoto Yoshikawa (JAXA)
COSPAR
Capacity Building Workshop on Planetary Science
July 23 - Aug. 3, 2007
Montevideo, Uruguay
July 28, 2007 COSPAR Capacity Building Workshop on Planetary Science, Montevideo, Uruguay
Overview
• Hayabusa science data has been released in April 2007 through a data distribution server placed at ISAS/JAXA.
• URL: http://hayabusa.sci.isas.jaxa.jp/
• The data type is fits or text. (total:2GB)
• The data will be transformed into PDS format by the collaboration with Hayabusa science team members of US.
• The data format is also discussed under the work of International Planetary Data Alliance (IPDA).
July 28, 2007 COSPAR Capacity Building Workshop on Planetary Science, Montevideo, Uruguay
Data
• AMICA : Images of Itokawa• NIRS : Infrared Spectrum• LIDAR : Distance between the sp
acecraft and Itokawa• XRS : X-ray Fluorescence Spectr
um• SPICE : Ancillary data• Shape Model : Digital data of the
shape of Itokawa
July 28, 2007 COSPAR Capacity Building Workshop on Planetary Science, Montevideo, Uruguay
Remote Sensing Instruments onboard Hayabusa
•Multi-Spectral Telescopic Imager (AMICA) > CCD viewing angle 5.7°with 8 band-pass filters > About 1500 still images obtained
•Laser Altimeter (LIDAR) > Measurement accuracy of 1 m at 50m altitude > 1,670,000 hits obtained
•Near-Infrared Spectrometer (NIRS) > 64-channel InGaAs detector at wavelengths of 0.8~2.1 micron > Viewing angle 0.1° (6-90 m per pixel spatial resolution) > More than 80,000 spectra obtained
•X-ray Fluorescence Spectrometer (XRS) > CCD viewing angle: 3.5°, 160 eV resolution at 5.9 keV > 6,000 spectra from the asteroid surface obtained
July 28, 2007 COSPAR Capacity Building Workshop on Planetary Science, Montevideo, Uruguay
Mission Sequence
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Launch9 May 2003
Earth Swingby19 May 2004
Asteroid Arrival12 Sept. 2005
(Observations, sampling)
Earth ReturnJune 2010
86,000km
20km
3km
10km
4,000km
Itokawa
Approach Phase
Proximity Phase
Cruising Phase
Gate Position
Home Position
Descent & Touch down
July 28, 2007 COSPAR Capacity Building Workshop on Planetary Science, Montevideo, Uruguay
Definition of the data level
Level-0: raw data (telemetry data)Level-1: data preserved after format change of
telemetry data (only telemetry data necessary for each instrument is included.)
Level-2: data produced by processing the Level-1 data
July 28, 2007 COSPAR Capacity Building Workshop on Planetary Science, Montevideo, Uruguay
Current Situation
• Calibration for data archives are still ongoing, and necessary information for data analysis is being arranged from now on.
• We do not have special tool to analyze our data. (You can use general tools such as IRAF, IDL, SPICE, etc, or you must make your own program.)
• We do not have a tutorial set of data analysis yet.
July 28, 2007 COSPAR Capacity Building Workshop on Planetary Science, Montevideo, Uruguay
What can we do in this Workshop?
• The data of AMICA (NIRS and XRS data may not be appropriate for this time.)
Ex 1. To study of the surface properties: the size distribution of boulders or craters
Ex 2. To create color image by using images taken by different filters
Ex 2. To study local topography by LIDAR
• The shape model Ex. to create the light curve of Itokawa
• SPICE data
July 28, 2007 COSPAR Capacity Building Workshop on Planetary Science, Montevideo, Uruguay
Shape model
Shape model of Itokawa is provided.
July 28, 2007 COSPAR Capacity Building Workshop on Planetary Science, Montevideo, Uruguay
Lightcurve of Itokawa
Kaasalainen et al, A&A 405, L29-L32 (2003)
July 28, 2007 COSPAR Capacity Building Workshop on Planetary Science, Montevideo, Uruguay
Lightcurve of Itokawa
by Hayabusa
July 28, 2007 COSPAR Capacity Building Workshop on Planetary Science, Montevideo, Uruguay
Local Topography Measured by LIDAR
JM
Rough Terrain near Tsukuba • Tsukuba Boulder with 3-4 m height was identified
• A possible rock fissure was also identified
• Rough Terrain: Surface roughness near Tsukuba Boulder: 2.2 m
• Smooth Terrain: Surface roughness in the Muses Sea: 0.6 m
(S. Abe, et al., Science, (2006))
Example: