AKATSUKI Longwave Infrared Camera (LIR) Data Archive

The science data obtained by Longwave Infrared Camera (LIR) onboard the AKATSUKI (also known as Venus Climate Orbiter and PLANET-C) spacecraft are provided on this page.

Instrument Overview

LIR detects thermal emission from the cloud top in a wavelength region 8 -- 12 μm to map the cloud-top temperature.

Data Download, metadata, citation information


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 calibration using baffle (hood) temperature
Level 2c (l2c)
calibrated data (physical value in FITS format) with calibration using baffle (hood) temperature
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.

Name of the camera: lir for LIR.
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 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., 052704 for 05:27:04.
kind of filter or image type: pic for picture, opn for open image, and sht for shutter (close) image.
level of product: l1b, l2b, l2c, l3b, l3bx, l3c, l3cx, and geo.
version string: v10 for "version 1.0".
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

Related Papers

Please see list of publications of AKATSUKI


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:

Toru Kouyama, National Institute of Advanced Industrial Science and Technology, t.kouyama _AT_ aist.go.jp
Makoto Taguchi, Rikkyo University, taguchi _AT_ rikkyo.ac.jp