Advanced Land Observing Satellite-2 (ALOS-2), also called Daichi-2, is a 2,120 kg (4,670 lb) Japanese satellite launched in 2014. Although the predecessor ALOS satellite had featured 2 optical cameras in addition to 1.2 GHz (L-band) radar, ALOS-2 had optical cameras removed to simplify construction and reduce costs. The PALSAR-2 radar is a significant upgrade of the PALSAR radar, allowing higher-resolution (1 x 3 m per pixel) spotlight modes in addition to the 10 m resolution survey mode inherited from the ALOS spacecraft. Also, the SPAISE2 automatic ship identification system and the Compact Infra Red Camera (CIRC) will provide supplementary data about sea-going ships and provide early warnings of missile launches.^{[citation needed]}

Advanced Land Observing Satellite-2

H-IIA Launch Vehicle Flight 24, launching the Advanced Land Observing Satellite-2 "Daichi-2".
Names	Daichi-2
Mission type	Remote sensing
Operator	JAXA
COSPAR ID	2014-029A
SATCAT no.	39766
Website	www.jaxa.jp/projects/sat/alos2/index_j.html
Mission duration	8 years, 4 months, 14 days (elapsed)
Spacecraft properties
Spacecraft type	Advanced Land Observing Satellite
Bus	ALOS
Launch mass	2,120 kg (4,670 lb)
Start of mission
Launch date	24 May 2014, 03:05:14 UTC[1]
Rocket	H-IIA 202
Launch site	Tanegashima, Yoshinobu 1
Contractor	Mitsubishi Heavy Industries
Orbital parameters
Reference system	Geocentric orbit[2]
Regime	Sun-synchronous orbit
Perigee altitude	636 km (395 mi)
Apogee altitude	639 km (397 mi)
Inclination	97.92°
Period	97.33 minutes
Advanced Land Observation Satellite ← ALOS ALOS-3 →

Launch

ALOS-2 was launched from Tanegashima, Japan, on 24 May 2014 by a H-IIA rocket.[3]

Mission

The satellite contains a 1.2 GHz synthetic-aperture radar (SAR) sensor that is intended to be used for cartography, monitoring of naval traffic and disaster monitoring of Asia and the Pacific. JAXA initially hoped to be able to launch the successor to ALOS during 2011, but these plans were delayed until 2014 because of budget restrictions.

See also

• 2014 in spaceflight
• Advanced Land Observation Satellite (ALOS) – predecessor spacecraft

References

External links

• Official website
• ALOS-2 brochure
• Advanced Land Observing Satellite-2 "ALOS-2" (DAICHI-2)　Gazing into Earth's Expression on YouTube by JAXA
• You can understand DAICHI-2 applications for disaster on YouTube by JAXA
• Eoportal ALOS-2 page

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