NICTFûFÚFáG GEGGGTGnFþ S( · Wavelength 532 nm 1064 nm 1064 nm RPF 20 ~1kHz 10 Hz 10 Hz Energy...

NICT

1um

(NICT)

1 4 ILRS 2016 3 9

PDC

TTC HAYABUSA2 LIDAR PI

JAXA ,Mt.Stromlo

2

p

pSpaceDebris

p

p

p

p

p Hauabusa2

p

4 ILRS 2016 3 9

• SSA SERC1um

SLR

• HAYABUSA- LIDARNICT-JAXA 2015 3 JAXA-LIDAR-PI

(2000km 500 kmLIDAR

LIDAR

• 12 310 11 12

3

SSA: Space Situation Awareness

SERC: Space Environment Research Center (Australia)

LIDAR: the light detection and ranging laser altimeter on Hayabusa 2

SLR: Satellite Laser Ranging 4 ILRS 2016 3 9

4 ILRS 2016 3 9 4

1.5m 75cm 1m

ALT-AZ ALT-AZ ALT-AZ

Coude,,

StationaryN

ASMYTH

DerotatedN

ASMYTH

Bent-

Cassegrain

Coude NASMY

TH,

Classic-

Cassagra

in,

Coude

ILRS 7308 7328 -

1m

1.5m

75

UTC-NICT

NICT

1m

5

Transmission

Only

Ranging ENGINE

RGG: Range Gate Generator

ET:Event Timer

4 ILRS 2016 3 9

Configuration Diagram

for Tracking Debris /Hayabusa2 sa2Transmission

and Receive Prediction

Debris DB

HIKARI

CENTER KSP

BUIDING

/

04/05/06/07/08 09 10 11 12 1 ~3

Hayabusa2

1.5m

SOTA

75

T/R

1um

HAYABUSA-2

8 27 DryRun

12/11-15

12/18-21

VxWorks

SOTA

Az,EL

KSP Surelite Surelite

10 13-16

11 10-1

6

8 10

SLR

BEACON SOTA

4 ILRS 2016 3 9

SpaceDebris Observation Laser

System Specification

7

Pico sec SLR

System

Nano sec Debris

/Hayabusa2 for

1.5 m telescope

Nano sec Debris/

Hayabusa2 for

75cm telescope

Wavelength 532nm 1064nm 1064nm

RPF 20~1kHz 10Hz 10Hz

Energy / pulse 0.5mJ 1.2J 800mJ

Pulse width 30ps 10ns 8ns

Nano sec Laser on

1.5m Telescope Coude Bench

4 ILRS 2016 3 9

Major Laser Specification

For ILRS,

POD/Geodesy For Space Debris,

Long Range Target

75cm J/pulse

1.5m J /pulse Energy per pulse(J)

0

0.8

1.5

4 ILRS 2016 3 9 8

4 ILRS 2016 3 9 9

NICT

4 ILRS 2016 3 9 10

Reference

Frequency

10 MHz,1pps(UTC)

PRF( ))Hz MHz

Target Mode -Fixed or

-Moving UP to 400,000km→2000

km

Modulation

Mode

-Normal mode

-PPM mode (Selectable)

PPM M=2-256

SLOTRATE 311.04MHz

à

UTC sync

Mode

sync at station clock

sync at target mode

Collision

Avoidance

RGG EventTimer

10MHz

4 ILRS 2016 3 9 11

4 ILRS 2016 3 9 12

4 ILRS 2016 3 9 13

4 ILRS 2016 3 9 14

2016 1 14 1.5m

4 ILRS 2016 3 9 15

Back ground Noise Received in GM-

APD 32x32 Array

4 ILRS 2016 3 9 16

Nov.11, 2015 JST Local Time

16:36:53___ 16:54:34______ 17:15:03_

ß 20 minutes each

Integration time

2D Photon distribution

Time series of noise

count per1000 frames

Results: Not received photon

from the Earth/Hayabusa2

4 ILRS 2016 3 9 17

Date Koganei Mt.Stromlo

Oct.13 Clouds 90% -

Oct.14 Clouds100% -

Oct.15 Clouds brake

20 minutes through

-

Oct.16 Rain -

Nov.10 Heavy clouds Rain

Nov.11 Heavy clouds 30 seconds

In cloud brake

Nov.12 Heavy Clouds Heavy Clouds

Nov.13 Clouds and rain Heavy Clouds

Nov.14 - Heavy Clouds

DEC.

• SSA

• HAYABUSA-2 LIDAR

•

• PDC

TTC HAYABUSA2 LIDAR PI JAXA

,Mt.Stromlo

4 ILRS 2016 3 9 18