Instrument Overview

IR1 measures the thermal radiaion mostly from the surface and a little from the atmosphere using four filters, 0.90 μm (dayside), 0.90 μm (nightside), 0.97 μm, and 1.01 μm.

Data Download, metadata, citation information

• Level 1b dataset (Raw data, VCO-V-IR1-2-EDR-V1.0)
• Level 2 dataset (Calibrated data, VCO-V-IR1-3-CDR-V1.0)
• geometry information dataset (VCO-V-IR1-3-SEDR-V1.0)
• Level 3 dataset (Map data)
• Cloud Motion Vector dataset

Documents

• List of Observation Programs (for UVI, IR1, IR2, and LIR) (v05) HTML, PDF, ASCII text
• List of FITS header keywords (for UVI, IR1, IR2, and LIR) (v07) HTML, PDF, ASCII text
• Description of the image coordinate (for UVI, IR1, IR2, and LIR) ASCII text
• Level 3 Variable Description (v01)
• Level 3 Algorithm Description (v01)
• Cloud Motion Vector Data Document

Definition of Product Level

Level 1b (l1b)

raw data (count value in FITS format)

Level 2b (l2b)

calibrated data (physical value in FITS format) without estimation of amount of smear at missing pixel

Level 2c (l2c)

calibrated data (physical value in FITS format) with estimation of amount of smear at missing pixel

geometry (geo)

geometry information (latitude, longitude, local time, phase angle, incidence angle, emission angle, azimuthal angle) at the center of each pixel.

Level 3 (l3b, l3bx, l3c, l3cx)

calibrated, physical values at equally spaced longitude-latitude grid in NetCDF format, derived from l2b and l2c data (l3b and l3c), and pointing corrected geometry information at the center of each pixel (l3bx and l3cx).

Cloud Motion Vector (CMV)

CMVs at equally spaced longitude-latitude grid in NetCDF format obtained by using l3b or l3c data.

File Naming Convention

Filename is in "CAM_DATE_TIME_KIND_LEVEL_VER.EXT" format.

CAM

Name of the camera: ir1 for IR1.

DATE

date in UTC when image taken at in "YYYYMMDD" format, where YYYY is four-digit year (2010 -- 20??), MM is two-digit month (01 -- 12), and DD is two-digit day (01 -- 31): e.g., 20151207 for 2015-12-07.

TIME

time in UTC when image taken at in "hhmmss" format, where hh is two-digit hour (00 -- 23), mm is two-digit minutes (00 -- 59), and ss is two-digit seconds (00 -- 60): e.g., 045200 for 04:52:00.

KIND

kind of filter or image type: 09d for 0.90 μm dayside filter, 09n for 0.90 μm nightside filter, 097 for 0.97 μm filter, 101 for 1.01 μm filter, dif for diffuser, and drk for dark image.

LEVEL

level of product: l1b, l2b, l2c, l3b, l3bx, l3c, l3cx, and geo.

VER

version string: v10 for "version 1.0".

EXT

extension that represents file type: fit for FITS file, jpg for JPEG file, png for PNG file, lbl for PDS3 label file, and nc for NetCDF file.

Data Processing tools

• For visualization:
  • SAOImage DS9
  • FV
  • GIMP
• For analysis:
  • CFITSIO (library for C and Fortran)
  • SFITSIO (library for C++)
  • astropy.io.fits (Python package)

Related Papers

Please see list of publications of AKATSUKI

Contacts

For questions concerning this archive:

Shin-ya Murakami, Japan Aerospace Exploration Agency, murakami.shinya _AT_ jaxa.jp

Yukio Yamamoto, Japan Aerospace Exploration Agency, yamamoto.yukio _AT_ jaxa.jp

For questions concerning the data:

Naomoto Iwagami, iwagami _AT_ epa.desc.okayama-u.ac.jp

George L. Hashimoto, Okayama University, george _AT_ gfd-dennou.org

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