Asteroid explorer, Hayabusa2,
reporter briefing

December 24, 2020
JAXA Hayabusa2 ProjectTopics
Regarding Hayabusa2,
Curation workCapsule collection group return reportExtended Mission target astronomical observations
Other

2020/12/24

Hayabusa2 reporter briefing

2

Contents
0. Overview of Hayabusa2
1. Current status and overall schedule of the project
2. Curation work
3. Capsule collection group return reports
4. Observations of the Extended Mission target
5. Public relations / outreach
6. Future plans
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Hayabusa2 reporter briefing

3Overview of Hayabusa2
Objective
We will explore and sample the C-type asteroid Ryugu, which is a more primitive type than the S-type asteroid
Itokawa that Hayabusa explored, and elucidate interactions between minerals, water, and organic matter in theprimitive solar system. By doing so, we will learn about the origin and evolution of Earth, the oceans, and life, andmaintain and develop the technologies for deep-space return exploration (as demonstrated with Hayabusa), a field
in which Japan leads the world.
Expected results and effects
By exploring a C-type asteroid, which is rich in water and organic materials, we will clarify interactions between
the building blocks of Earth and the evolution of its oceans and life, thereby developing solar system science.
 Japan will further its worldwide lead in this field by taking on the new challenge of obtaining samples from acrater produced by an impacting device.
We will establish stable technologies for return exploration of solar-system bodies.
Features:World’s first sample return mission to a C-type asteroid.
World’s first attempt at a rendezvous with an asteroid and performance of observation before and after projectile
impact from an impactor.
Comparison with results from Hayabusa will allow deeper understanding of the distribution, origins, andevolution of materials in the solar system.
International positioningJapan is a leader in the field of primitive body exploration, and visiting a type-C asteroid marks a newaccomplishment.
This mission builds on the originality and successes of the Hayabusa mission. In addition to developing planetaryscience and solar system exploration technologies in Japan, this mission develops new frontiers in exploration ofprimitive heavenly bodies.
NASA too is conducting an asteroid sample return mission, OSIRIS-REx (launch: 2016; asteroid arrival: 2018;
Earth return: 2023). We will exchange samples and otherwise promote scientific exchange, and expect further
scientific findings through comparison and investigation of the results from both missions.

2020/12/24

Hayabusa2 reporter briefing(Illustration: Akihiro Ikeshita)

Hayabusa 2 primary specifications
Mass
Approx. 609 kg
Launch3 Dec 2014
MissionAsteroid return
Arrival27 June 2018
Deoarture
13 Mov 2019
Earth return6 Dec 2020 (plan)
Stay at asteroid Approx. 18 months
Target body
Near-Earth asteroid Ryugu

Primary instruments
Sampling mechanism, re-entry capsule, optical cameras, laser
range-finder, scientific observation equipment (near-infrared,
thermal infrared), impactor, miniature rovers.

4

Mission flow
LaunchDec 3, 2014

Earth swing-by
Dec 3, 2015

MINERVA-II1 separation
Sep 21, 2018

Ryugu arrival
June 27, 2018

Target marker
separation
Oct 25, 2018

Ryugu
departure
Nov 13, 2019

Targetmarker
Dec. 6, 2020
MINERVA-II2 separation
Complete!
separation
Sept. 17,
(image credit: illustrations including spacecraft
Oct. 3, 20192019
by Akihiro Ikeshita, others by JAXA)

Earth return

2020/12/24

MASCOT
separation
Oct 3, 2018

Secondtouchdown
July 11, 2019

Targetmarkerseparation
May 30,2019

Hayabusa2 reporter briefing

Impactor (SCI)
5 April, 2019

First touchdown
Feb 22, 20195

1. Current project status & schedule overview
Current
status:–––During the curation work, chambers B & C, in addition to chamber A, have been opened.
The collection teams have all returned to Japan and are currently in quarantine (participating via telework).
The spacecraft is operating smoothly. Earth/Moon observations are almost complete. As of today, the distancefrom Earth is over 7 million km.
Observations of the target of the Extended Mission, celestial body 1998 KY26, were carried out andsuccessful observations made at three locations.

–

2015

Schedule
overview123

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2020/12/24

Hayabusa2 reporter briefing

62. Curation work•

The collection container

Catcher chamber A below), chamber B andchamber C are opened, and after moving to thethe collection container (right), microscopic
observation has begun.

image creditJAXA

2020/12/24

Image after opening chamber A

Region for photos on next page inner diameter 17mm

Hayabusa2 reporter briefing

7

2. Curation work•••

The presence of many particles larger than 1 mm in both chambers A and C has been verified.
Particles in chamber C are clearly larger in size than those in chamber A.
A substance that appears to have an artificial origin has been confirmed in chamber C (currently under investigation)
Artificial object
Right figureView from above thecollection container

5 mm
Optical microscope image of chamber A(inside the collection container)

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5 mm
Optical microscope image of chamber C(inside the collection container)

Hayabusa2 reporter briefing

The collection container    
8

3. Capsule collection team return report•

Although the results of the capsule collection have been explained,
here each of the people in charge will introduce their specific workand the site situation.

•

Introduced in the order following the flow of the collection work:

1.
2.
3.
4.
5.
6.

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Ground Optical Observation System (GOS)
Direction Finding System (DFS)
Marine Rader System (MRS)
Drone search (DRONE)
RHQ (Recovery Headquarters) & Helicopter
CapsuleHayabusa2 reporter briefing

9Capsule collection team return report

Ground Optical Observation System (GOS)

1) Equipment development and training in Japanll

Based on knowledge from Hayabusa, we developed a Mobile
Optical Orbit Determination System using a star-alignment
camera and tracking camera that can perform automatic
observations with high accuracy (right figure).
However, there were concerns that sufficient practice would not
be possible, as there was no appropriate fast moving light source
to simulate the capsule.

2) Preparation work at Woomerall

The preparation work suffered from the intense heat during the
day and cold at dawn, invasion of flies during the day and moths
at night. There was also the appearance of terrifying insects!
As we had introduced airborne observations for this mission, a big
concern was the weather. During the on-site rehearsals, there weremany days when the stars were not visible, so preparations for the
optical orbit determination system and telephoto tracking had tobe completed at the last minute.
image creditJAXA

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Hayabusa2 reporter briefing10Capsule collection team return report

Ground Optical Observation System (GOS)

3) Capsule return daylllStrong winds the previous day led to concerns about observation of 
the capsule, but the wind suddenly weakened and sky to the northwest
cleared to give perfect conditions.
The ground station’s optical orbit determination system worked
perfectly and the trajectory and predicted landing site weresuccessfully determined. The telephoto tracking system also captured
the capsule and succeeded in tracking until just before the fireballdisappeared (right image).
We would like to thank the local DOD staff and NASA for theircooperation!

image credit JAXA
2020/12/24

Hayabusa2 reporter briefing11Capsule collection team return report

Direction Finding System (DFS)(map from the Royal Australia Air Force website, see p34)
 Overview
Five beacon directional search stations were placed to surround the expected landing areaof 150 km100 km to predict the capsule landing point based on the principal of triangulation
and wind data [slide: “Direction Finding System Team”]
 Preparation
1. Life in isolation and in the scorching heat Immediately after 3 weeks of isolation in Japan & Australia, assembly and adjustment work began
in the desert with 47℃ temperatures and 5% humidity with wind speeds of 10m/s.
 Physical strength and condition needed to be maintained.
 Also a healthy mind and motivation.
 “DFS gymnastics” at lunchtime every day during the isolation in Australia. This helped someteam members with back pain.
2. Operation on the reentry day was backed up by a lot of practice Practice sessions more than 10 times in Japan- Hot climate simulation in August (support of Sagamihara City)- Balloon tracking practice in Uchinoura (support from Kushima City and Cape Toi)
- Tracking practice assuming a variety of events with the DFS simulator.
 Real operation went easier than in practice. Operation timings were no difference between practice to real one.
3. Activites in Woomera
image creditJAXA Challenges coordinating between 6 bases scattered over 100 square km and Japan base in a poor communication environment [slide: “DFS station members”]
 Moving over 500 km / day. [Reinforcement signal via Michibiki’s MADOCA assisted efficiency] [Slide: “Position measurement with Michibiki /MADOCA”]
 Cooperation with the DoD escort (directions, animal avoidance, generators, water, cars).
 Activities rescheduled / re-think due to delayed cargo arrival One of the 5 receiving stations collapsed due to strong wind, damaging the antenna. A practice day was reallocated to repair and the antenna was safely revived [slide: “Receiving station collapse andrecovery”]
 A flexible response allows handling of diverse predicaments.
4. “Chanko” team
 A team consists from members from all over JAXA, including researchers, engineers (electricity, battery, radio waves, geology, aircraft, materials, computers, crewed space), procurement & businesspromotion departments etc.
 Challenges include securing a schedule for practice, sharing goals among members with different specialties and establish the integrated operation needed by a team.
 As a step for the next project: in addition to information collection by telephone (voice), we also tried using data communication (network) and succeeded in predicting the landing point.
 Meeting people is the real thrill of the project.

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Hayabusa2 reporter briefing

12Capsule collection team return report

Direction Finding System (DFS)Directional search results
 While the system requirement was 3 km, the capsule landing point was predicted with an error of about 200 m.
 Reasons for DFS high-precision landing point prediction
 Operation on the reentry day was based on practice and calibration.
- Receiver assembly know-how affects accuracy: the parts are for amateur radio specifications. The aim is to combine these into a system that allows highly
accurate directional exploration.
- High precision antenna operation assisted through abundant practice: how to move the antenna considering gear backlash, and secure beacon lock-on.
- 4 hour calibration for 20 minute beacon reception: Measurement system characteristics change over time. Calibration was performed multiple times to understandthe characteristics of the measurement system when the beacon was actually received.
- Measure accuracy: For every location, it was necessary to measure the location of 3 places: the receiving station, the collimation station and check antenna station.
The determination of longitude, latitude and altitude greatly contributes to the accuracy of directional exploration.
 Continuously improving accuracy from practice in Japan to just before actual event- Improvement of calibration formula- Improvement of triangulation intersection determination map for higher accuracy- Success utilizes the knowledge of JAXA as a whole, such as from balloon tracking practice at Uchinoura
Space Center and wind prediction from the atmospheric balloon experiment group.
 In the helicopter test on November 30, the results of practice were apparent and we could begin production
with confidence.
 Looking back on the work
Experience of conveying the location from the middle of the desert to the I/B coverage team and ISAS
spacecraft control team. Despite the enthusiasm in each place, events cannot be rushed.
 When the visual fireball to confirm the capsule entry to the atmosphere appeared in the expected location, andimage creditJAXA
the light got steadily brighter followed by the white tail, time stood still! You’re here! Next is the beacon!
 Sending the location. Great landing point prediction – thank you! Due to cooperation between system and people. [Slide: “DFS (Voice): ILPP Accuracy ≒200m]
 The spacecraft heads to the next celestial target. Thank you for delivering the capsule!
 Reference slides: “Information transmission by DFS phone (voice)”, “Operation in the DFS (voice) caravan”, “capsule fireball seen from northernmost DFS station”.

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Hayabusa2 reporter briefing

13Capsule collection team return report

Atmospheric flight trajectory

5,000 case analysis / condition
３ degrees of freedom：１hr
６ degrees of freedom：~８ hrs■12/3(R-2d) 17:30：
TCM-4 OD1＋predicted wind
sent to DFS team at dawn on 12/4
・Capsule parameters confirmed（parachute trigger, anchor separation,
REMM etc）
・for TCM-5 permission

result’s
TCM-4 OD
is using day
point analys
g
in
d
n
la
＋
wind
predicted■12/5(R-1d) night：
Flight analysis based on TCM-4 OD2＋
predicted wind → DFS server
・To prepare search with latest data
■12/6(R) after 02:30： DFS AOSPa
pr raced hu
ict te
ion
ell
ips
e

deployed
point●

Strong and expected jet stream at
an altitude of 10 ‒ 15 km, andmoved trajectory significantly tothe east.

ted windsing predic
Analysis uof the dayon
DFS directi

Conceptual diagram
Factually deformed conceptual diagram

Reliable data：
・5 stations form a beautiful intersection
・Expected flight, with sufficient time for signal
reception (~25 minutes)
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Hayabusa2 reporter briefing

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Capsule collection team return report

Marine Rader System (MRS)

Overview
p Search using marine radar

Search without requiring a beacon as a back-up
for DFS.

p Private sector-based team

Led by Koden Electronics Co., Ltd.
mixed team of 3 x JAXA, 6 x Koden)

Preparation
Repeated multiple tests and training
lowered concern about preparations     

Activities
2018Joined to collection team2019Tracking test at Uchinoura (Feb.) and Woomera (Dec.), domestic
training (Sept. ~ Nov.)
2020 Domestic training (Jul. ~ Oct.), collection operation (Dec.)
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Hayabusa2 reporter briefing

Marine radar jointly developed by Koden
Electronics and JAXA Space Exploration Hub.

15Capsule collection team return report

Marine Rader System (MRS)

On-site work

EquipmentlayoutMap from Royal Australian
Airforce website. See p. 34

Deploy marine radar at 4 sites
Ø Extreme heat high of 47℃Search results summary

The 2 days for equipment installation were particularly hot…

Ø Dirt driving4 hour round trip, 160 km commuteOperation on the reentry day
Each site searched individually. Results were
aggregated and then the final result was reported toheadquarters (RHQ)Ø

Required quick aggregation and reporting.

Contact
systemThe ringing tone of the satellite phone still reverberates in ourears…

Search results
ü 3 stations successfully tracked (up to 30 km or more)ü Detected to a range of ~200m near the landing point
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creditJAXA

Hayabusa2 reporter briefing

16Capsule collection team return report

•

DRONE

Aerial photograph by uncrewed flight + high speed image recognition technology -> capsule detection→ High-precision position determination + capsule status confirmation via aerial images→ Last resort for capsule discovery• Results: The front heat shield was detected during the sample capsule collection operations, andlocation and status reported. Contributed to the subsequent quick recovery of the heat shield.
• Realized with cooperation from Fuji Imvac (uncrewed aerial vehicle), Aero Asahi, Skymatics (aerial
photography, onboard image analysis) and JAXA (image analysis).

animationimage creditJAXA
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Hayabusa2 reporter briefing17Capsule collection team return report

•
•
•
•
•

DRONE

times listed are local times
Headquarters informed of the expected landing point at around 06:30.
Take off was at around 07:20 with the front heat shield as the search target.
Aerial view of an area approximately 2 km x 2 km  around 2500 photographs taken.
Landed at around 08:50 and began analysis.
Before 09:00, the capsule was recognized and location and status reported.

40m

Front heat shieldimage creditJAXA
2020/12/24

60m
Hayabusa2 reporter briefing18Capsule collection team return report

DRONE
•

Successful practical use by a hybrid combination of uncrewed aeriel vehicles and AI technology→ Value in achieving results in limited time and conditions.

•

Suggests future applications for cost-efficiency and rapid sample collection→ The experience provided insights for more efficient detection•

Although the arrival of the equipment was late, and it was not possible to participate in rehearsals, therapid recovery was able to proceed as scheduled.
→ Careful training for this situation•

To achieve results in this operation, it was necessary to overcome problems through flexibly
responding to situations in the field such as non-ideal runway conditions or unexpected wind.
→ Skilled technology operator for image recognition, repeated improvements

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Hayabusa2 reporter briefing

19Capsule collection team return report

RHQhelicopter

RHQ: Planning, execution and work support for the overall recovery operation from the re-entry of the sample returncapsule (SRC) through to the delivery of the collected material to the curation chamber on the Sagamihara
Campus in Japan.
Helicopter Search for the SRC components I/M. parachute, front H/S, back H/S) and transport them.
Search helicopter AW139, Transport helicopter Bell412(1) Preparation until the reentry
Domestic helicopter test

Test day

Test

Details

8/6

Domestic helicopter test
assistant from Aero Asahi Co.,Ltd

Confirm visibility at search altitude (~100 m), measurevibration environment within helicopter

11/30

AM

Exploration helicopter function
test

Performance test of directional field probe (DF)mounted on exploration helicopter using a test beacon
transmitterPM

Evaluation test of ground systems(DFS ,MRS) using the helicopter

Tracking test conducted using a helicopter with a test
beacon transmitter to act as the capsule.

Rehearsal

Confirmation of operation procedures, night
exploration training with the exploration helicopter

11/30

12/1, 2

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Capsule collection team return report

RHQhelicopter(2) Episode•A confirmation test with the exploration helicopter was scheduled to be conducted in Australia in September, but restrictions on international
movement meant that prior verification in Australia had to be abandoned. Actual production was therefore completed with one previous test
conducted a week before the collection operation.
•
During the Hayabusa mission, the search-only flight and recovery flight were completed separately. However, to reduce the time until recovery, thistime the flight encompassed both exploration and transportation of the recovered units. As a result, we were able to recover the SRC in a very shorttime but the helicopter cruising time was prolonged.
(3) Actual operation and results•
The helicopter advanced test and rehearsal were worthwhile, and the actual operation could be
performed calmly.
•
Approximately 20 mins after the take-off of the search helicopter, the beacon signal emitted fromthe I/M was received. After that, it took some times, but the I/M was visually confirmed from theair at around 06:00 am, at around sunrise.
•
As a result, the recovery helicopter took-off and the work at the I/M landing point began.
•
DFS, MRS and the Australian radar were used as radio wave sensors for directional exploration.
Although the wind was strong during the operation, we were able to identify the position of thelanding point to extremely high accuracy. This was established as a result of the direction
exploration method.
•
The heat shield did not have a radio wave source, so an optical search using UAV (winged
aircraft) was attempting for the first time. The error from the actual landing point was 50m or less,image creditJAXA
so we were able to demonstrate the technology as a powerful search method.
•
We were able to collect all SRC components and deliver them to the QLF in just 11 hours after
re-entry.

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Hayabusa2 reporter briefing

21Capsule collection team return report

CapsuleCapsule collection and safety
processing
Cross

Forebody Heatshield

Parachute

AftbodyHeatshield

Instrument Module■12/2 Early morning rehearsal
・Practice for an unexpected situation where the anchor had not separated (ad lib)・Identify many safety issues and reflect them in actual operation (manual, work clothes, work) Discussion with DoD in Australia was particularly productive in overcoming issues and the successof the actual operation.
■12/6 Early morning actual operation
・Rehearsal return? I/M with parachute remaining, anchor normal operation (no wind on ground).
・Perfect collection and safety work

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Hayabusa2 reporter briefing

22Capsule collection team return report

Confirmation of sound within the sample container at the QLF
QLF inside story

p

The process of processing the capsule safely, disassembling the instrument module and connecting the sample container to the gas
sampling device requires several steps in order to turn the sample container upside down.

p

If you measure the internal sound (vibrations) while turning the capsule over, it is possible you may hear something to indicate a sample
is inside. Therefore, a high-performance microphone was attached to the flange surface of the sample container to measure noise.

p

As the inside of the sample container is close to a vacuum, sound is transmitted only via the conducting metal parts and is very small, so
cannot be heard directly by ear.

p

Listening to the recorded sound revealed the noise of small, hard particles moving (personal impression: like the sound of glass beads)pBased on general C-type meteorite analysis, a hard sound was not expected, we
decided to analyze again at a later date (QLF work is carried out on a very tighttimeframe, so we could not discuss it further at the time)p

After directly observing the particles in the catcher in the curation chamber, it was
found that hard particles were included based on the feel of picking up the particles for
vacuum storage. It is therefore probably that the sound heard at the QLF was thesound of the Ryugu sample.

p

We decided to share the sound so everyone can hear the Ryugu sample!

Position of microphone

Raw sound 

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Hayabusa2 reporter briefing



23

4. Observations of the Extended Mission target• At the end of 2020, there was an opportunity to observe asteroid 1998 KY26, which is thedestination of the Extended Mission. The brightness was only about 25 mag, so a large telescope
was required for the observation. The purpose of the observation was to improve the accuracy of
the known orbit.
• Successful observations were completed with the Subaru Telescope of the National Astronomical
Observatory of Japan (Hawaii, aperture 8.2m), the VLT and GTC.
• These observations will improve the accuracy of the known orbit of 1998 KY26 and allow a morereliable trajectory plan to be performed.

VLT (Very Large Telescope)4 x 8.2m caliber telescopes built by theEuropean Southern Observatory (ESO)
at the Paranal Observatory in Chile.

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GTC (Gran Telescopio Canarias)
A 10.4m telescope on the island of La
Palma in the Spanish Canary Islands, led
by the Canary Institute of Astrophysics(Instituto de Astrofísica de Canarias).

Hayabusa2 reporter briefing24

4. Observations of the Extended Mission target
Obsevation of 1998 KY26

Observations with the Subaru Telescope

Observations with the VLT

Observations with the GTC

Observation time: 2020/12/10 at 12:04-12:16
UTC
25.4 magObservation time 2020/12/10
26.1 magObservation time: 2020/12/15
1:00-3:08 UTC
45s observations x 70 images

image creditNAOJ
https://www.nao.ac.jp/news/topics/2020/20201218subaru.html
2020/12/24

image creditESO / ESA NEOCC
http://neo.ssa.esa.int

Hayabusa2 reporter briefingimage creditM. Popescu(Astronomical Institute of the
Romanian Academy) /GTC/IAC

25

5. Public relations / outreach
Photographing the capsule fireball• Time of fireball appearance
2:28:482:29:22 (JST)• The track next to the capsule fireballtrack is likely Starlink-1190.

    
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Hayabusa2 reporter briefing

Captured at Coober Pedy
26

5. Public relations / outreachGood-bye, Earth observation campaign• Our planet Earth, seen from the receding Hayabusa2. Captured with the ONC-T.
• Photo: Japan time: 12/612 (distance approx. 200,000km ~ 2.5 million km)• Data reveals the existence of abundant water and life (plants). The Earth image is useful as a check for theaccuracy of the onboard sensors.

2020/12/24

animationimage credit: JAXA, AIST,
University of Tokyo, Kochi
University, Rikkyo University,
Nagoya University, Chiba Instituteof Technology, Meiji University,
University of Aizu.

animation

Left Color composition
Right: Vegetationweighted image

Hayabusa2 reporter briefing27

5. Public relations / outreach

Ryugu & Hayabusa2 Return Observation Campaign Report• Number of registrants135• 77 successful observations of the Hayabusa2 spacecraft(10 additionally succeeded in observing the re-entry capsule)Institutes that successfully observed the re-entry capsuleOkayama: Kyoto U Okayama Observatory Seimei Telescope
Nagano: Kiso Observatory, U. of Tokyo
Hyogo:
Nishiharima Observatory, Hyogo Prefectural U.
Tottori:Tottori City Saji Observatory
Tokyo:NAOJ Information Center
Hokkaido: Nayoro Observatory, Hokkaido University Observatory   
Ehime:
Kuma Kogen Astronomical ObservatoryMiyagi:Sendai Astronomical Observatory
Okayama: Bisei Observatory
Organizer Hayabusa2 Project, Japan Public Observatory Society (JAPOS), The Planetary
Society of Japan (TPSJ)
Kyoto:
Kayama Astronomical Obs. Kyoto Sangyo U.

Campaign URLJAPOS https://www.city.himeji.lg.jp/atom/planet/info/campaign/haya2return/index.html
TPSJ http://planetary.jp/Haya2-Special/projects/hayabusa2-serv.html

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Hayabusa2 reporter briefing28

6. Future Plans
 Operation schedule
Early 2021/1
ion engine operation begins
 Press and media briefings
2021/1 TBD
Press briefing @ online

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Hayabusa2 reporter briefing

29Reference material

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Hayabusa2 reporter briefing30

Clean chamber overview
CC3-1
Opening the sample container undervacuum environment
CC3-2
Sample collection under vacuum
CC3-3
Transition from vacuum to nitrogenenvironment
CC4-1
Handling of submillimeter-sizedparticles 

CC4-2
Handling / observation / sorting ofrelatively large particles (> mm)  

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Hayabusa2 reporter briefing

31Reference: Catcher opening operation
A
B
C

Particles are
confirmed
from above
chamber Ap

The sample catcher was moved to clean chamber CC3-2, and the lid of sample catcher chamber A was opened in
vacuum conditions.

pMany particles are confirmed to be in chamber A. This is thought to be the sample collected during Touchdown#1 on Ryugu.

pPart of the sample was picked up in Chamber A to be stored in vacuum in its present condition.

p

From here, we will move to chamber CC3-3, remove the samples from chamber A in a nitrogen environment,
and open chambers B and C.

    
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Hayabusa2 reporter briefing

32

Altitude ~100km

Direction Finding System Team

Fireballconfirmation!

••

Altitude ~10km
Deploy parachute!

Tracking system after parachute deployment.
5 stations in the field track the capsule beacon using
antenna, the azimuths are aggregated at headquarters,then identify coordinates of the capsule.

Check beacon signal!

Track to just before
landing!

(( ))Informationtransmission via
satellite line

Coordinates from informationfrom each station

HQ (I/B)
ISAS
Onsite (station)

Distance between stations is
10s km to more than 100 km

    

SakaiIshimaru

Imai

S1

DFS station members  



N1
Knoxy-sanIijima Fujita Igawa

Budgy-sanIkuta
Kanaya Irikado

S2R2 Emily-san
YasuokaSone

Fukushima
S3B

I/B

Kanamaru
Nagashima
Kabumoto
Noguchi

Sato
Ito

Isa
2020/12/24

YamadaMiura

ISAS@Japan

Map: https://www.airforce.gov.au/news-and-events/news/woomera-prohibited-area-important-information-about-stuart-hwy-access-and-green

34

Position measurement with Michibiki /MADOCA    
2020/12/24

Hayabusa2 reporter briefing

35Receiving station collapse & recovery    

recovery!!

Ø The strong wind in the desert caused the gantry to fall and the antenna to bend.
Ø But repair was completed the next day with help by members of R2 onsite and headquarters. It worked
without problems on the day of the return, and we was able to track the capsul with high accuracy.
2020/12/24

Hayabusa2 reporter briefing

36

DFS(Voice) : ILPP Accuracy ≒ 200m

ΔLat=213m,ΔLon=150m

ILPP: Instantaneous
Landing Point Prediction

Final stage,
human judgement
2020/12/24

    
Hayabusa2 reporter briefing

37

Information transmission by DFS phone (voice)    
2020/12/24

Hayabusa2 reporter briefing

38

Operation in the DFS (voice) caravan
Collimation
stationReceivingstation    
2020/12/24

Hayabusa2 reporter briefing39         
40



                        