Mitsubishi Heavy IndustriesH3-22Yoshinobu Launch Complex LP-2, Tanegashima Space Center, Japan
ALOS-3 (Maiden flight)
Launched
March 7, 2023 · 01:37 UTC

Image: JAXA
Summary
ALOS-3 (Maiden flight) launched on a Mitsubishi Heavy Industries H3-22 from Yoshinobu Launch Complex LP-2, Tanegashima Space Center, Japan on March 7, 2023 at 01:37 UTC. The mission failed: 2nd stage engine failed to ignite due to electrical circuit failure between vehicle controller and engine igniter at engine ignition. The launch window ran from 01:37 to 01:44 UTC. It was Mitsubishi Heavy Industries's 48th launch, 2nd this year and humanity's 6,400th orbital launch attempt. It was the 1st H3-22 flight. The payload was bound for Sun-Synchronous Orbit (SSO).
- Result
- 2nd stage engine failed to ignite due to electrical circuit failure between vehicle controller and engine igniter at engine ignition.
- Watch
- Vehicle
- H3-22 · Mitsubishi Heavy Industries
- Booster
- No booster details on record.
- Mission
- Earth Science · Sun-Synchronous Orbit (SSO)
- Milestone
- 1st H3-22 flightMitsubishi Heavy Industries's 48th launch2nd this yearhumanity's 6,400th orbital launch attempt32nd orbital launch attempt this year
Webcast
Flight preview
Flight timeline
- T−0Liftoff
- T+1M56SBooster Separation
- T+3M34SFairing Separation
- T+4M58SMECO
- T+5M5SStage 2 Separation
- T+5M17SSES-1
- T+16M36SSECO-1
- T+16M57SPayload Separation
About this launch
Maiden flight of the H3 launch vehicle, carrying the Advanced Land Observing Satellite-3 (ALOS-3). ALOS-3, also known as Advanced Optical Satellite is a successor of the optical mission of the Advanced Land Observation Satellite “DAICHI” (ALOS). The new satellite will achieve improved ground resolution (0.8 m) while observing a wide -swath (70 km) by a larger sensor with higher performance compared to DAICH, and continuously observe not only Japan but also global land areas to construct a system that can swiftly and timely acquire, process and distribute image data. Based on the accumulated data captured in pre- and post-disaster times, the satellite aims to become one of the imperative devices for disaster prevention and preparation activities of countries and municipal governments. Observation data acquired by the satellite is also expected to be useful in various fields such as contributing to the maintenance and updates of precise geospatial information in Japan as well as developing countries, and research and applications on coastal and land environmental monitoring by its observation capabilities.
Related page: JAXA | Advanced Land Observing Satellite-3 “DAICHI-3” (ALOS-3)
Pad

Yoshinobu Launch Complex LP-2, Tanegashima Space Center, Japan
10th launch from Yoshinobu Launch Complex LP-2, 1st this year · 87th from Tanegashima Space Center, Japan
Local pad time at liftoff: Mar 7, 10:37 AM GMT+9, in daylight
18 launches from this pad · 99 from Tanegashima Space Center, Japan
about 3 years after the previous launch from this pad
All launches from Tanegashima Space Center, JapanOpen in maps
Updates
Apparent failure at 2nd stage ignition;FTS initiated.
Show 9 earlier updates
Liftoff.
Cosmic_Penguin · 3/7/2023 · source
Webcast live
Cosmic_Penguin · 3/7/2023 · source
24 hours slip due to weather.
Cosmic_Penguin · 3/4/2023 · source
March 6 new launch date confirmed by JAXA.
Cosmic_Penguin · 3/3/2023 · source
NET March 6 per local news reports and air-space closure notices.
Cosmic_Penguin · 3/3/2023 · source
NET early March
Cosmic_Penguin · 2/27/2023 · source
Launch aborted post main engine ignition due to 1st stage problem; roll back to VAB required.
Cosmic_Penguin · 2/17/2023 · source
24 hr delay after abort
scottm3 · 2/17/2023
hold at engine ignition
scottm3 · 2/17/2023 · source
Questions
When did ALOS-3 (Maiden flight) launch?
ALOS-3 (Maiden flight) launched on March 7, 2023 at 01:37 UTC. The launch window ran from 01:37 to 01:44 UTC.
Why did ALOS-3 (Maiden flight) fail?
2nd stage engine failed to ignite due to electrical circuit failure between vehicle controller and engine igniter at engine ignition.
Where can I watch ALOS-3 (Maiden flight)?
Coverage: Launch of the First H3 Launch Vehicle with Advanced Land Observing Satellite-3 “DAICHI-3” onboard; Launch of the First H3 Launch Vehicle with Advanced Land Observing Satellite-3 “DAICHI-3” onboard; H3ロケット試験機1号機/先進光学衛星「だいち3号」(ALOS-3)打上げライブ中継. Watch the replay
What rocket launched ALOS-3 (Maiden flight)?
H3-22, flown by Mitsubishi Heavy Industries. H3-22 spec sheet
Where did ALOS-3 (Maiden flight) launch from?
Yoshinobu Launch Complex LP-2, Tanegashima Space Center, Japan. Liftoff was Mar 7, 10:37 AM GMT+9 local time at the pad.
What orbit was ALOS-3 (Maiden flight) going to?
Sun-Synchronous Orbit (SSO), a earth science mission.
