ALOS-3
{{Short description|Japanese satellite}}
{{Infobox spaceflight
| auto = all
| name = Advanced Land Observing Satellite 3
| names_list = Daichi 3
| image =
| image_caption = ALOS-3 Satellite
| image_size = 220px
| mission_type = Remote sensing
| operator = JAXA
| website = {{url|https://www.jaxa.jp/projects/sat/alos3/index_j.html}}
| COSPAR_ID =
| SATCAT =
| mission_duration = 13 minutes and 55 seconds
| spacecraft_bus =
| manufacturer = Mitsubishi Electric
| dry_mass =
| launch_mass =
| power =
| launch_date = 7 March 2023 1:38:15 UTC {{cite press release |date=March 5, 2023 |title=Launch Time and Launch window of the First H3 Launch Vehicle （H3TF1）Carrying the Advanced Land Observing Satellite-3 "DAICHI-3" (ALOS-3) |url=https://global.jaxa.jp/press/2023/03/20230305-1_e.html |publisher=JAXA |access-date=March 7, 2023}}
| launch_rocket = H3-22S
| launch_site = Tanegashima LP2
| launch_contractor = Mitsubishi Heavy Industries
| disposal_type = Destroyed via FTS
| deactivated =
| last_contact = March 7 2023 1:55 approximately
| decay_date = March 7 2023
| orbit_epoch =
| orbit_reference = Geocentric
| orbit_regime = Sun-synchronous
| orbit_periapsis =
| orbit_apoapsis =
| orbit_eccentricity =
| orbit_semimajor =
| orbit_inclination =
| orbit_period =
| apsis = gee
| instruments = OPS: OPtical Sensor
IRS: InfraRed Sensor
| previous_mission = ALOS-2
| next_mission = ALOS-4
}}
Advanced Land Observing Satellite 3 (ALOS-3), also called Daichi 3, was a 3-ton Japanese satellite launched on March 7 2023 which failed to reach orbit. 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
Launch
ALOS-3 launched from Tanegashima, Japan by a H3 rocket on 7 March 2023. Initially the launch was scheduled for 17 February but was aborted seconds before liftoff.{{cite news |last=Clark |first=Stephen |date=February 17, 2023 |title=First launch of Japan's H3 rocket aborted moments before liftoff |url=https://spaceflightnow.com/2023/02/17/first-launch-of-japans-h3-rocket-aborted-moments-before-liftoff/ |newspaper=Spaceflight Now |accessdate=2023-03-07}}
= Timeline =
| class="wikitable"
! rowspan="2" |MET ! colspan="2" |Time ! rowspan="2" |Date(UTC) ! rowspan="2" |Event |
| JST
!UTC |
|---|
| X-22:00:00
|12:37:55 |03:37:55 | rowspan="3" style="text-align:center" |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 | rowspan="24" style="text-align:center" |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 it had been 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.{{cite news |last=JAXA |first=JAXA |date=February 17, 2023 |title=h3 presskit. |language=ja |pages=57pp |newspaper=JAXA |url=https://fanfun.jaxa.jp/countdown/h3/files/h3_presskit.pdf |accessdate=2023-02-17}} ALOS-3 carried OPS (OPtical Sensor), a multi-band optical camera which is an upgrade from the PRISM sensor.{{cite web |url=https://fanfun.jaxa.jp/countdown/h3-alos3/files/jaxa_doc-02.pdf |title=先進光学衛星「だいち3号」概要説明書 |publisher=JAXA |access-date=2023-03-07 |language=ja}} OPS was capable of observing a {{convert|70|km|adj=on|sp=us}} wide strip of land on Earth.{{cite news |last=Akiyama |first=Ayano |date=February 16, 2023 |title=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」 |url=https://news.yahoo.co.jp/byline/akiyamaayano/20230216-00337543 |language=ja |newspaper=Yahoo! Japan |accessdate=2023-03-07}} 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.
See also
{{Portal|Spaceflight}}
References
{{Reflist}}
External links
- {{Official website|https://global.jaxa.jp/projects/sat/alos3/}}
- [https://fanfun.jaxa.jp/countdown/h3-alos3/index.html H3×ALOS-3 Special Site] (JAXA)
- [https://alos-pasco.com/en/alos-3/ ALOS-3], PASCO CORPORATION
{{Japanese space program}}
{{Orbital launches in 2023}}
Category:Earth observation satellites of Japan