ALOS-4

Advanced Land Observing Satellite 4
Names	Daichi 4
Mission type	Remote sensing
Operator	JAXA
COSPAR ID	2024-123A
SATCAT no.	60182
Website	www.jaxa.jp/projects/sat/alos4/index_j.html
Mission duration	32 days, 20 hours, 16 minutes; (elasped)
Spacecraft properties
Manufacturer	Mitsubishi Electric
Start of mission
Launch date	July 1, 2024, 03:06:00 UTC
Rocket	H3-22S
Launch site	Tanegashima LP2
Contractor	Mitsubishi Heavy Industries
Orbital parameters
Reference system	Geocentric
Regime	Sun-synchronous
Instruments
	PALSAR-3: Phased Array Type L-band Synthetic Aperture Radar-3; SPAISE3: SPace based AIS Experiment 3rd
	← ALOS-3 ALOS-5 →

Advanced Land Observing Satellite 4 (ALOS-4), also called Daichi 4 (daichi is a Japanese word meaning "great land"), is a 3,000 kg (6,600 lb) Japanese L-band synthetic-aperture radar (SAR) satellite that was launched on July 1, 2024. It carries PALSAR-3 (Phased Array type L-band Synthetic Aperture Radar-3), which is a successor to the PALSAR-2 on ALOS-2 satellite. ALOS-4 is the fourth satellite which carries L-band SAR operated by JAXA, following JERS-1, ALOS, and ALOS-2.