Names | Daichi 3 |
---|---|
Mission type | Remote sensing |
Operator | JAXA |
Website | www |
Mission duration | 13 minutes and 55 seconds |
Spacecraft properties | |
Manufacturer | Mitsubishi Electric |
Start of mission | |
Launch date | 7 March 2023 1:38:15 UTC [1] |
Rocket | H3-22S |
Launch site | Tanegashima LP2 |
Contractor | Mitsubishi Heavy Industries |
End of mission | |
Disposal | Destroyed via FTS |
Last contact | March 7 2023 1:55 approximately |
Decay date | March 7 2023 |
Orbital parameters | |
Reference system | Geocentric |
Regime | Sun-synchronous |
Instruments | |
OPS: OPtical Sensor IRS: InfraRed Sensor[2] | |
Advanced Land Observing Satellite 3 (ALOS-3), also called Daichi 3, was a 3-ton Japanese satellite launched on March 7 2023. It was to succeed the optical sensor PRISM (Panchromatic Remote-sensing Instruments for Stereo Mapping) carried on the ALOS satellite, which operated from 2006 to 2011. The ALOS-2 satellite and the ALOS-4 satellite carry synthetic-aperture radar.
The satellite was launched as the payload on the first launch of the H3 rocket in March 2023. A failure of the second stage engine to ignite led to the rocket along with its payload ALOS-3 being destroyed by use of Flight Termination System (FTS) to prevent risk of falling debris.
Spacecraft details
ALOS-3 has a mass of 3 tonnes, and 7 reaction wheels.[3]
Launch
ALOS-3 launched from Tanegashima, Japan by a H3 rocket on 7 March 2023.[1] Previously the launch was scheduled for 17 February but was aborted seconds before liftoff.[4]
Timeline
MET | Time | Date(UTC) | Event | |
---|---|---|---|---|
JST | UTC | |||
X-22:00:00 | 12:37:55 | 03:37:55 | 6
March 2023 |
1st Go/No-Go Decision |
X-18:00:00 | 16:37:55 | 07:37:55 | Airframe movement (VAB > LP2) | |
X-12:00:00 | 22:37:55 | 14:37:55 | 2nd Go/No-Go Decision | |
X-00:57:00 | 09:40:55 | 00:40:55 | 7
March 2023 |
3rd Go/No-Go Decision |
X-00:10:00 | 10:27:55 | 01:27:55 | Final Go/No-Go Decision | |
X-00:08:00 | 10:29:55 | 01:29:55 | Start of Countdown | |
X-00:07:00 | 10:30:55 | 01:30:55 | Safety System ready | |
X-00:07:00 | 10:30:55 | 01:30:55 | Completion of Firing System Preparation | |
X-00:05:00 | 10:32:55 | 01:32:55 | Satellite System ready | |
X-00:04:00 | 10:33:55 | 01:33:55 | Automatic Countdown Sequence Start | |
X-00:04:00 | 10:33:55 | 01:33:55 | Start of Pressurization of each tank | |
X-00:02:50 | 10:35:05 | 01:35:05 | Power Switching (External to Internal) | |
X-00:00:55 | 10:37:00 | 01:37:00 | Completion of each tank Pressurization | |
X-00:00:53 | 10:37:02 | 01:37:02 | Frame deflector operation | |
X-00:00:35 | 10:37:20 | 01:37:20 | Water Curtain operation | |
X-00:00:18 | 10:37:37 | 01:37:37 | Flight mode on | |
X-00:00:15 | 10:37:40 | 01:37:40 | Single-Stage Thermal battery activation | |
X-00:00:15 | 10:37:40 | 01:37:40 | All System are ready | |
X-00:00:12. | 10:37:43. | 01:37:43 | Pyrotechnic Torch Ignition | |
X-00:00:06 | 10:37:49 | 01:37:49 | LE-9 Engine Start | |
X+00:00:00 | 10:37:55 | 01:37:55 | SRB-3 Engine Start & Liftoff | |
X+00:01:06 | 10:39:01 | 01:39:01 | Max Q | |
X+00:01:56 | 10:39:51 | 01:39:51 | SRB-3 Jettision | |
X+00:03:32 | 10:41:27 | 01:41:27 | Satellite Fairing Separation | |
X+00:04:56 | 10:42:51 | 01:42:51 | Main Engine Cutoff (MECO) | |
X+00:05:04 | 10:42:59 | 01:42:59 | 1st and 2nd Stage Separation | |
X+00:13:55 | 10:51:50 | 01:51:50 | Flight Interruption |
Mission and sensors
If successfully launched, ALOS-3 would have been an Earth observation satellite and was to be used to monitor natural disasters as well as for cartography.[3] ALOS-3 carried OPS (OPtical Sensor), a multi-band optical camera which is an upgrade from the PRISM sensor.[2] OPS was capable of observing a 70-kilometer (43 mi) wide strip of land on Earth.[5] In addition to the RGB and infrared band covered by the predecessor ALOS satellite, ALOS-3 has two additional bandwidths: coastal and red edge. Coastal allows observation underwater up to a depth of 30m, while red edge was to be used to monitor vegetation growth.[5]
See also
References
- ^ a b "Launch Time and Launch window of the First H3 Launch Vehicle (H3TF1)Carrying the Advanced Land Observing Satellite-3 "DAICHI-3" (ALOS-3)" (Press release). JAXA. March 5, 2023. Retrieved March 7, 2023.
- ^ a b "先進光学衛星「だいち3号」概要説明書" (PDF) (in Japanese). JAXA. Retrieved 2023-03-07.
- ^ Clark, Stephen (February 17, 2023). "First launch of Japan's H3 rocket aborted moments before liftoff". Spaceflight Now. Retrieved 2023-03-07.
- ^ a b Akiyama, Ayano (February 16, 2023). "射点に登場 打上げを待つJAXA新型基幹ロケット「H3」と12年ぶりの光学地球観測衛星「だいち3号」". Yahoo! Japan (in Japanese). Retrieved 2023-03-07.
External links
- Official website
- H3×ALOS-3 Special Site (JAXA)
- ALOS-3, PASCO CORPORATION