hayabusa data archives

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).


Website


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


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


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


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


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.


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


Shape model

Shape model of Itokawa is provided.


Lightcurve of Itokawa

Kaasalainen et al, A&A 405, L29-L32 (2003)


Lightcurve of Itokawa

by Hayabusa


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:

hayabusa data archives

Documents