NICTFûFÚFáG GEGGGTGnFþ S( · Wavelength 532 nm 1064 nm 1064 nm RPF 20 ~1kHz 10 Hz 10 Hz Energy...
Transcript of 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
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• 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
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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
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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
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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
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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
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NICT
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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
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2016 1 14 1.5m
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Back ground Noise Received in GM-
APD 32x32 Array
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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
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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
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