Hodoyoshi 4

Hodoyoshi-4
Spacecraft properties

Mission type	Earth observation
Operator	NESTRA
COSPAR ID	2014-033B
SATCAT №	40011
Mission duration	907 days (ongoing)

Manufacturer	University of Tokyo
Launch mass	66 kg (146 lb)

Start of mission
Launch date	19:11, June 19, 2014 (2014-06-19T19:11)
Rocket	Dnepr
Launch site	Dombarovsky

Orbital parameters
Reference system	Geocentric
Eccentricity	0
Perigee	620 km (390 mi)
Apogee	620 km (390 mi)
Inclination	97.9°

Hodoyoshi-4 is a Japanese micro-satellite launched in 2014. The satellite is built in 0.5x0.6x0.7m box-shape bus, optimized for piggy-back launch. All instruments are powered by solar cells mounted on the spacecraft body and two stub wings, with estimated electrical power of 50W.^[1] For orbit-keeping, a "miniature" (5 kg dry weight) ion thruster with specific impulse 1100s and operating power 20W is integrated into the body.^[2] The satellite was developed under the Funding Program for World-Leading Innovation R&D on Science and Technology.^[3]

Launch

Hodoyoshi-4 was launched from Dombarovsky (air base) site 13, Russia, on 19 June 2014 by a Dnepr rocket. Two-side communication with Earth was successfully achieved at 2nd pass over ground station.

Mission

The satellite is intended primarily for technology verification in space, main test piece being Earth observation telescope with nominal 6.7m GSD at 650 km altitude.

Hiroshima Japan, taken by Hodoyoshi-4 Satellite

Albert France taken by Hodoyoshi-4 Satellite

Space Message Display System: Electronic Message Display & Observation Window

Hosted Payload Box installed on Hodoyoshi-3 & Hodooyshi-4 satellites

^[4]

Specification of Hodooyshi-4 Earth observation telescope
Item	Value
GSD	5-7m @ 600-650 km
Type	Pushbroom scan
Diameter	150mm
Focal Length	1,000mm
Swath	24 km
Format	Raw, 12bit
Band	Blue: 0.45 um-0.52 um, Green: 0.52 um-0.60 um, Red: 0.63 um-0.69 um, NIR: 0.73 um-0.90 um

Secondary mission is measurements of water level in rivers to monitor floods by using Store&Forward System.^[5] Third mission is Hosted Payload. Hosted Payload mission consisted of 10 cm-cubic boxes on which users could install their own apparatuses for their own applications. Project members asked users in private partnership in order to explore new market of satellite utilization. One of the apparatuses was space message display system. Electronic message display was installed which operators could change characters on the display by sending commands from the ground station. Users can take photos of their messages with the view of the earth from the window.

References

External links

Hodoyoshi 4 on Facebook
Nano-Satellite Center, University of Tokyo
Hodoyoshi and UNIFORM satellites tracking

Japanese space program

JAXA
- former ISAS
- NAL
- NASDA
USEF
NICT

Astronomical
observation

Completed	Hakucho Hinotori Tenma Ginga Yohkoh ASCA HALCA Akari Suzaku

In operation	Hinode Hisaki

Failed	Hitomi¹

Planned	Nano-JASMINE Astro-H Succesor LiteBIRD SPICA² ATHENA²

Cancelled	Astro-G

Communications,
broadcasting and
positioning

Completed	Sakura (1 2a 2b 3a 3b) Yuri 1 2a 2b 3a 3b BS 2X 3H 3N Kakehashi N-STAR a b Kirari MBSat

In operation	Kodama Kizuna N-STAR c d MTSAT QZSS Michibiki

Planned	QZSS QZS-2 QZS-3 QZS-4 JDRS

Earth observation

Completed	Taiyo Kyokko Jikiken Denpa Ohozora Ume 1 b Fuyo-1 Momo 1 1b Midori I II Daichi Akebono

In operation	GEOTAIL¹ Himawari Aqua¹⁷ TRMM¹ Ibuki Shizuku GPM¹ Daichi-2

Planned	ERG GCOM-C GOSAT-2 EarthCARE² Advanced Optical Satellite Advanced Radar Satellite ASNARO

Engineering tests

Completed	Ohsumi Shinsei Kiku 1 2 3 4 5 6 7 Tansei 1 2 3 4 Ayame 1 2 Jindai Orizuru Myojo Ryusei EXPRESS SFU LDREX 1 2 LRE Tsubasa DASH USERS Micro LabSat-1 SERVIS-1 SERVIS-2 SDS-1

In operation	Ajisai Reimei Kiku-8 IKAROS SDS-4

Planned	SLATS Next Engineering Satellite SERVIS-3

Cancelled	SmartSat-1 PETSAT

Human spaceflight

Completed	H-II Transfer Vehicle 1 2 3 4 5

In operation	International Space Station (ISS) & Kibo¹²³⁴⁵⁶

Planned	H-II Transfer Vehicle 6 7 8 9 X1

Cancelled	HOPE-X Fuji manned spacecraft

Lunar and
planetary exploration

Completed	Sakigake Suisei Hiten Hayabusa Kaguya (SELENE)

In operation	Akatsuki Hayabusa 2 PROCYON

Failed	Nozomi Shin'en

Planned	BepiColombo (MMO)² EQUULEUS OMOTENASHI SLIM JUICE² MMX Trojan asteroid exploration SELENE-R MELOS

Cancelled	Lunar-A Jupiter Magnetospheric Orbiter

Private
miniaturized satellites

Completed	Fuji 1 2 Kanta-kun (WEOS) HIT-SAT CUTE 1.7+APD Maido-1 Kūkai Kagayaki Negai☆″ Waseda-SAT2 Hayato WE WISH Niwaka RAIKO CosMoz

In operation	Fuji-3 CUTE 1 1.7+APDII XI IV V SEEDS Raijin Kiseki Hitomi Horyu 2 PROITERES RISING-2 SOCRATES

Planned	WNI satellite SPROUT TSUBAME QSAT-EOS SOMESAT

Reconnaissance

Completed	IGS-Optical 1 2 Experimentally 3 IGS-Radar 1 2

In operation	IGS-Optical 3 4 5 Experimentally 5 IGS-Rader 3 4 Spare

Planned	IGS-Optical 6 7 8 IGS-Rader 5 6 7 8

Italics indicates projects in development.
Superscripts indicate joint development with¹NASA, ²ESA, ³ASI, ⁴CSA, ⁵RKA, ⁶AEB and ⁷INPE.

← 2013 · Orbital launches in 2014 · 2015 →

January	GSAT-14 – Thaicom 6 – CRS Orb-1 (Flock-1 × 28 · ArduSat-2 · Lituanica SAT-1 · LitSat-1 · SkyCube · UAPSat-1) – TDRS-L

February	Progress M-22M – ABS-2 · Athena-Fidus – Türksat 4A – USA-248 – GPM Core · Ginrei · KSAT-2 · INVADER · OPUSAT · STARS-II · TeikyoSat-3 · ITF-1

March	Ekspress AT1 · Ekspress AT2 – Astra 5B · Amazonas 4A – Kosmos 2494 – Soyuz TMA-12M – Shijian XI-06

April	USA-249 – Sentinel-1A – IRNSS-1B – Progress M-23M – Ofek-10 – USA-250 – EgyptSat 2 – SpaceX CRS-3 · KickSat · PhoneSat 2.5 · ALL-STAR/THEIA · SporeSat · TestSat-Lite – Luch 5V · KazSat-3 – KazEOSat 1

May	Kosmos 2495 – Ekspress AM4R – USA-251 – USA-252 – Kosmos 2496 · Kosmos 2497 · Kosmos 2498 · Kosmos 2499 – ALOS-2 · Raijin-2 · UNIFORM-1 · SOCRATES · SPROUT – Eutelsat 3B – Soyuz TMA-13M

June	Kosmos 2500 – Deimos-2 · KazEOSat 2 · Hodoyoshi 3 · Hodoyoshi 4 · AprizeSat 9, 10 · BRITE-Montreal · BRITE-Toronto · BugSat 1 · SaudiSat-4 · TabletSat-Aurora · UniSat-6 (AeroCube-6 · ANTELSAT · Lemur-1 · Tigrisat) · DTUSat-2 · Duchifat-1 · NanoSatC-Br 1 · PACE · Perseus-M × 2 · PolyITAN-1 · POPSAT-HIP-1 · QB50P1 · QB50P2 · Flock-1c × 11 – SPOT 7 · CanX-4 · CanX-5 · AISat · VELOX-I

July	OCO-2 – Gonets-M 18, 19, 20 – Meteor-M 2 · AISSat-2 · DX-1 · Relek · SkySat-2 · TechDemoSat-1 · UKube-1 – O3b × 4 (FM3, FM6, FM7, FM8) – CRS Orb-2 (Flock-1b × 28 · TechEdSat-4) – Orbcomm-2 × 6 – Foton-M No.4 – Progress M-24M – USA-253 · USA-254 · USA-255 – Georges Lemaître ATV

August	USA-256 – AsiaSat 8 – Yaogan 20 A, B, C – WorldView-3 – Gaofen 2 · Heweliusz – Galileo FOC-1 · Galileo FOC-2

September	Chuangxin 1-04 · Lingqiao – AsiaSat 6 – Yaogan 21 · Tiantuo 2 – MEASAT 3b · Optus 10 – USA-257 – SpaceX CRS-4 – Soyuz TMA-14M – Olimp-K – Shijian XI-07

October	Himawari 8 – IRNSS-1C – Intelsat 30 · ARSAT-1 – Yaogan 22 – Ekspress AM6 – Chang'e 5-T1 · 4M – Shijian 11-08 – Cygnus CRS Orb-3 (Arkyd-3 · Flock-1d × 26 · GOMX-2 · RACE) – Progress M-25M – USA-258 – Meridian 7

November	Sasuke · Hodoyoshi 1 · Kinshachi 1 · Tsukushi · Tsubame – Yaogan 23 – Yaogan 24 – Kuaizhou 2 – Soyuz TMA-15M – Kosmos 2501

December	Hayabusa 2 · PROCYON · Shinen 2 · DESPATCH – Orion EFT-1 – DirecTV-14 · GSAT-16 – CBERS-4 – Yaogan 25 A, B, C – USA-259 – Yamal-401 – O3b × 4 (FM9 to FM12) – Kondor-E No.2 – IPM – Kosmos 2502 – Resurs-P No.2 – Yaogan 26 – Astra 2G – Fengyun 2-08

Launches are separated by dashes ( – ), payloads by dots ( · ). Manned flights are bolded. Launch failures are in italics. Payloads deployed from other spacecraft are (enclosed in brackets).

This article is issued from Wikipedia - version of the 9/4/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.

Hodoyoshi 4

Launch

Mission

See also

References

External links