The Advanced Land Observing Satellite-2 (ALOS-2) is follow-on mission from the “DAICHI”, which contributed to cartography, regional observation, disaster monitoring, and resource surveys. ALOS-2 will succeed this mission with enhanced capabilities. Specifically, JAXA is conducting research and development activities to improve wide and high-resolution observation technologies developed for DAICHI in order to further fulfill social needs.
The launch time of the H-IIA Launch Vehicle No. 14 (H-IIA F14) with the DAICHI-2 onboard was set for 12:05:14 p.m. on May 24 (Sat.) 2014 (Japan Standard Time). JAXA will broadcast a live launch report from the Tanegashima Space Center from 11:15 a.m. on the day. You can watch it through the Internet at home.
Characteristics of Advanced Land Observing Satellite-2 “DAICHI-2” (ALOS-2)
1) Disaster monitoring of damage areas, both in cosiderable detail, and when these areas may be large
2) Continuous updating of data archives related to national land and infrastructure information
3) Effective monitoring of cultivated areas
4) Global monitoring of tropical rain forests to identify carbon sinks.
The state-of-the-art L-band Synthetic Aperture Radar (PALSAR-2) aboard ALOS-2, which is an active microwave radar using the 1.2GHz frequency range, will, in responding to society’s needs, have enhanced performance compared to DAICHI/PALSAR. The PALSAR-2 is capable of observing day and night, and in all weather conditions.
Precise diagnosis of the earth using “L-band SAR” Japanese advanced technology
ALOS-2 will have a spotlight mode (1 to 3m) and a high resolution mode (3 to 10m), whilst PALSAR has a 10m resolution. It will allow comprehensive monitoring of disasters by providing users with more detailed data than DAICHI/PALSAR.
The observation frequency of ALOS-2 will be improved by greatly expanding the observable range of the satellite up to about 3 times, through an improvement in observable areas (from 870km to 2,320km), as well as giving ALOS-2 a right-and-left looking function, currently not available on DAICHI/PALSAR.
ALOS-2’s roles can be divided into three categories: