cnes presentation: * space debris activities ...un-copuos, 50th session of the lsc, april 2011,...

CNES Presentation:

* SPACE DEBRIS ACTIVITIES

* REGISTRATION ISSUES

Mario HucteauHead of Registration OfficeCOPUOS LSC, Vienna - April 2011

UN-COPUOS, 50th session of the LSC, April 2011, Vienna

SUMMARY

■SPACE DEBRIS ACTIVITIESReentries, End of life operations, Collision risk moni toring, Space Act, tools

■REGISTRATION ISSUESCNES Registration Office, French Registry, Non-registrat ion issue


0

5000

10000

15000

20000

25000

30000

35000

40000

0 5000 10000 15000 20000 25000 30000 35000 40000

1958 - 2011

Apogée

Périgée

LEO

MEO

GEO

GTO

~15 000 space objects


0

200

400

600

800

1000

1200

1400

1600

1800

2000

0 200 400 600 800 1000 1200 1400 1600 1800 2000Apogée

Périgée

1958-2011

LEO(< 2000km)


40

50

60

70

80

90

100

110

0 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000

Incl

Perigee/Apogee

Polar orbit plan

ISS

SSO


35000

35200

35400

35600

35800

36000

36200

36400

36600

36800

37000

35000 35200 35400 35600 35800 36000 36200 36400 36600 36800 37000

GEO


-5

0

5

10

15

20

35000 35100 35200 35300 35400 35500 35600 35700 35800 35900 36000 36100 36200 36300 36400 36500 36600 36700 36800 36900 37000

Apogee/Perigee

Incl °

Equator Plan

GEO (35786km)


ATMOSPHERIC REENTRIES

■Two French registered objects reentered into the at mosphere in 2010 :

Identification Launch date Description Reentry date

2009-058D 29 Oct 2009 SYLDA 9 Sept 2010Ariane 5 (V192)

2001-029D 12 July 2001 SYLDA 6 Oct 2010Ariane 5 (V142)


END OF LIFE OPERATIONS IN LEO

■4 « ESSAIM » satellites launched December 18, 2004

■« Myriade » platform: ~120 kg, formation flying

■Quasi heliosynchroneous orbit around 700 km altitude

■Mission: characterization of the electromagnetic envi ronment

■Operated by CNES


■End of life operations in September and October 2010■1st step: altitude lowering in order to:

� reduce the orbital lifetime� empty the tanks�manage the collision risks between the

4 satellites

■2nd step: electrical passivation�Battery discharge�Satellites switch-off

■Final orbit: the 4 satellites are compliant with the 25-year rule

END OF LIFE OPERATIONS IN LEO


■EUTELSAT W2■Platform : 3t■Launched October 1998 by Eutelsat IGO■Decommissioned in March 2010 by Eutelsat SA

■Final orbit:� Perigee 281 km above GEO� Apogee 290 km above GEO

■Will not reenter into the GEO protected region

■Compliant with UN space debris guidelines (A/Res/62 /217, Dec 2007)

END OF LIFE OPERATIONS IN GEO


COLLISION RISK MONITORING

■17 LEO satellites and 1 GEO satellite controlled by CN ES■Permanent collision risk monitoring and avoidance

maneuvers when necessary■ Improvements of the procedure:

�Use of Conjunction Summary messages received from U S Joint Space Operations Center

�Use of the Radar Graves catalogue and measurements


COLLISION RISK MONITORING

■2010 synthesis:

� 18 satellites monitored� 353 risks identified by the automated process (prob ability of

collision > 10 -4)� 92 risk alerts received from US JSpOC� 21 requests for radar measurements or support to JS pOC

(probability of collision > 10 -3)� 13 avoidance maneuvers


SPACE OPERATIONS ACT

■Law entered into force on December 10, 2010■Objectives: protection of people, property, public heal th and

environment (including on orbit)■Applicable to

�Operators carrying out operations from French terri tory�French operators anywhere in the world

■Operators shall demonstrate compliance w.r.t. regulati ons■Authorizations are granted by the Ministry of Research after

analysis by CNES



■Associated Technical Regulations prepared by CNES in 2009 and 2010 with participation of industry and operators■ In line with the UN-COPUOS and IADC Mitigation Guideli nes■Content:

�Ground safety requirements (controlled and uncontro lled reentry)�Space debris limitation�End of life operations�Collision risk reduction�Planetary protection�Nuclear safety



■Methods and tools are proposed to support the implementation of the Technical Regulations:

�Fragmentation modeling during reentry�Estimation of ground risk in case of reentry�Determination of compliance with the 25-year rule� Long term stability of the GEO graveyard orbit�Collision risk during launch phase


REGISTRATION ISSUES

■New Registration Office (ref to National Legislation )

■French Registry for 2010:

+ 3 satellites (Picard (LEO), W3B (GTO), KA-SAT (GEO))+ 12 launcher elements (GTO) (cf 6xAriane launches)- 2 reentries

Total (1965-2010) = 262 space objects (84 satellite s)


178

128

49

41

43

84 s a t e l l i t e s

262

13 avec rentrée > 25 ans

21 x GEO

inactifs

actifs

1 x GTO

21 x LEO9 avec rentrée < 25 ans

27 x GEO

2 x GTO

12 x LEO

1 (débris Cerise)

RegistreNational1965-2010


+ Declaration of launches in 2010 for 11 satellites :To be registered soon !…

�Non registration issue :

�318 (/ 3503) in-orbit satellites are not registered (=> 9 % )

�323 satellites launched by Ariane [1979-2010] & stil l in-orbit

�82 satellites are not registered (1983-2010)� 25%� 20 States/International Organizations


September 2011

Soyouz

Vega

cnes presentation: * space debris activities ...un-copuos, 50th session of the lsc, april 2011,...

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