ALOS-2/CIRC L1 Radiance

  • DOI: 10.57746/EO.01gs73bkmxdrvqd9peawcvf1ba
  • Last Updated: 2023-02-14
Data Progress: In Work
G-Portal

Product Summary

ALOS-2/CIRC L1 Radiance is obtained by Compact Infrared Camera (CIRC) onboard ALOS-2 and produced by the Japan Aerospace Exploration Agency (JAXA).
The Advanced Land Observing Satellite-2 (ALOS-2, "DAICHI-2") is Sun-synchronous sub-recurrent Orbit satellite launched on May 24, which is a follow-on mission from the ALOS "Daichi". CIRC is an infrared sensor primarily intended for detecting forest fires, which present a serious problem for the various countries of Southeast Asia, particularly considering the effects of global warming and climate change. The spatial resolution and field of view are 210 m and 128 km × 96 km from an altitude of 628 km in the case of ALOS-2. Main characteristic of the CIRC is also an athermal optics. The athermal optics compensates the defocus due to the temperature change by using Germanium and Chalcogenide glass which have different coefficient of thermal expansion and temperature dependence of refractive index.
This dataset includes radiance data derived from Level 0 data and the radiometric correction applied. The physical quantity is W/um/sr/m^2.
The provided format is GeoTIFF. The spatial resolution is about 210 m. The projection method is UTM. The current version is 11.0.

Platform
ALOS-2
Sensor
CIRC

Coverage

Temporal Coverage

2014-07-04 to Present

Spatial Coverage

Bounding Rectangle
(90.0°, -180.0°, -90.0°, 180.0°)

Resolution

210 m

Location

  • GEOGRAPHIC REGION > GLOBAL LAND
Dataset Short Name
ALOS-2_CIRC_L1_RAD
Platform / Sensor
ALOS-2 / CIRC
Coverage
Spatial Coverage
Bounding Rectangle
(90.0°, -180.0°, -90.0°, 180.0°)
Temporal Coverage
2014-07-04 to Present
Product Level ID
L1
Version Description

Version 11, 2020-01-10, Available

File Format
GeoTiff
Dataset Type
None / None
Resolution
Spatial Resolution
210 m
Temporal Resolution
None
Dataset Progress
In Work
Projection
UTM
Collection Data Type
SCIENCE_QUALITY
Get Data
https://gportal.jaxa.jp/gpr/?lang=en
Dataset Title
ALOS-2/CIRC L1 Radiance
Distribution Format
GeoTiff
Fees
Free
Citation
Japan Aerospace Exploration Agency. 2014. ALOS-2/CIRC L1 Radiance. https://doi.org/10.57746/EO.01gs73bkmxdrvqd9peawcvf1ba
Access Constraints

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Use Constraints

The user is entitled to use G-Portal data free of charge without any restrictions (including commercial use) except for the condition about acknowledgement of data credit as stipulated in G-portal terms of use 7.(2).Click here for detailed G-Portal data usage constrains.

G-Portal Terms of service
https://gportal.jaxa.jp/gpr/index/eula?lang=en
ISO Topic Categories
  • DISASTER
  • ECONOMY
  • ENVIRONMENT
Science Keywords
  • EARTH SCIENCE > HUMAN DIMENSIONS > NATURAL HAZARDS > WILDFIRES
  • EARTH SCIENCE > HUMAN DIMENSIONS > NATURAL HAZARDS > WILDFIRES > BURNED AREA
  • EARTH SCIENCE > SOLID EARTH > TECTONICS > VOLCANIC ACTIVITY > VOLCANO OCCURRENCES
  • EARTH SCIENCE > SPECTRAL/ENGINEERING > INFRARED WAVELENGTHS > BRIGHTNESS TEMPERATURE
  • EARTH SCIENCE > SPECTRAL/ENGINEERING > INFRARED WAVELENGTHS > INFRARED IMAGERY
  • EARTH SCIENCE > SPECTRAL/ENGINEERING > INFRARED WAVELENGTHS > INFRARED RADIANCE
  • EARTH SCIENCE > LAND SURFACE > SURFACE THERMAL PROPERTIES
  • EARTH SCIENCE > SPECTRAL/ENGINEERING > INFRARED WAVELENGTHS > THERMAL INFRARED
  • EARTH SCIENCE > SPECTRAL/ENGINEERING > SENSOR CHARACTERISTICS > THERMAL PROPERTIES
Location Keywords
  • GEOGRAPHIC REGION > GLOBAL LAND

ISO Topic Categories is the keywords in the ISO 19115 - Geographic Information Metadata.

Science Keywords hosts Global Change Master Directory (GCMD) Keywords which are a hierarchical set of controlled Earth Science vocabularies that help ensure Earth science data, services, and variables are described in a consistent and comprehensive manner and allow for the precise searching of metadata and subsequent retrieval of data, services, and variables.