corot : 27th scientific committee€¦ · 27th scientific committee : 2008/03/14 durations of the...

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COROT : 27th Scientific Committee

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27th Scientific Committee : 2008/03/14

Mission History and planning

D E1 E2

2007

IRa01 SRc01

LRc01 LRa01 SRa01

J F M A M J J A S O N D J F M A M J J

LRc02

Ear

ly O

per

atio

ns

443 days

Templates E2

DPU1 SET

REVEX

LV LVLV SAA limitsupdated

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Current Mission Status

■Satellite : Nominal behavior■GPS anomalies:

3 events 01/02/2007, 19/07/2007, 29/01/2008 No impact on the mission

■Instrument : nominal behavior except SET on DPU1 in January 08 Faulty Ecartometry data using Corot ID 2503 during SRa01

operations■Ground segment :

Corot Control Center : Nominal Corot Mission Center : Nominal Ground stations : See further details

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Single Event Transient (SET) : January the 18th

■What ? Physical reset of DPU1 probably due to Proton impactduring SAA crossing■When ? Friday, the 18th of January at 22:45:57 UT (LRa01)■OBS Services & Processings restarted Tuesday, the 22th of

January at 14:37:41 UT

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CMC

■Corotsky : OMP data update V2.4 : 2008/02/01 => Exo Stars (AP) added for SRa01 (NGC 2264

cluster) V2.5 : 2008/03/12 => update of fields

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Ground Stations

■Kiruna / Aussaguel (TTCET) stations Loss of TM packets (HKTMR, PLTM1) 3 main events in 2007 :

• SKRN01 Oct, 10th : 7h of loss due to a physical locking of the antenna : during Pointing andoperations for LRa01 => no impact on the mission

• SAUS01 Oct, 19th and 28th : 2 loss of 3 h each due to faulty electronic TMHD board => missionimpacted only at the 2nd failure

• SKRN01 Nov, 11th: one loss of 14h00 due to a new physical locking of the antenna => missionimpacted. Corrected by new SW version installed beg. Of December at the station.

Beg. Of 2008• Use of the « TTCET kit» at KIRUNA since 08/03/10

■ALC station Main events in 2007:

• power supply,• tracking limits (elevation) increased from 10 to 15° above horizon,

Main events beg. of 2008• New procedure for the initialization (Demodulator error)

Good CNES-INPE I/F has been set up at fall of 2007■VGS Station :

Down linking tested once a week

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Ground Stations : Passes Loss - Packets Loss

LRa01

LRc01

SRcO1

IRa01

RUN

42856

68640

15500

18821

Total Nb ofpasses

PacketLoss

PassesLoss

KirunaKiruna

21803LRa01

28401LRc01

6600SRc01

11600IRa01

Total Nb ofpasses

PacketLoss

PassesLossRUN

AussaguelAussaguel

26535LRa01

4781211LRc01

10150SRc01

16305IRa01

Total Nbof passes

PacketLoss

PassesLossRUN

AlcantaraAlcantara

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TM Loss for each RUN

0%

1%

2%

3%

4%

IRa01 SRc01 LRc01 LRa01

Percentage of missing telemetry packets per run

PLTM1

HKTM

PLTM2

1,34%

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Acquisition of Seismology data : LRa01

LRA01

0.65

0.7

0.75

0.8

0.85

0.9

0.95

1

22/10/2007

02/11/2007

13/11/2007

24/11/2007

05/12/2007

16/12/2007

27/12/2007

07/01/2008

18/01/2008

29/01/2008

09/02/2008

20/02/2008

02/03/2008

PLTM1

PLTM2

Spec

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DURATIONS of the OBSERVATIONSOBS Durations

58

28

157

92

26

55

28

157

137

24

58

26

152

87

24

55

26

142

132

24

0

20

40

60

80

100

120

140

160

180

IRa01 SRc01 LRc01 LRa01 SRa01

days

A1

A2

E1

E2

LR : 150 days

SR : 20 days

10

41

151

142 133

92

128

41

New Exo Templates

SET DPU1

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Status of Current RUN : SRa01

■Pointing : r.a. 101.04°, dec. 9.02°, roll 2.31°=> End Date (Corotsky block 1607.1) = 08/03/31

■Scientific Services & Processing started A1 : 2008/03/05 at 22:39 UT A2 : 2008/03/07 at 12:56 UT E1, E2 : 2008/03/07 at 22:30 UT Exo Oversampling (the 500 brighest stars) : 2008/03/10 at 12:07 UT Update of Astero Masks : 2008/03/12 at 17:00 UT

■Upload of specific Astero windowing + CCD acquisitionwindow to be done 26th of March => to investigate why ID 2503provided faulty Ecartometry data■End of SRa01 expected 31st of March (almost 24 days of

observation for E1)

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Orbit Plan Inclination■Goal : to decrease the RA of the ascending node in order to recenter the

Corot eye around future interesting fields■Target : - 4°/year during 2 years : TBC

Evolution de l'ascension droite centrée pour Corot

13,93

14,03

14,13

14,23

14,33

14,43

14,53

14,63

14,73

14,83

14,93

15,03

27/12/2006 05/02/2007 17/03/2007 26/04/2007 05/06/2007 15/07/2007 24/08/2007 03/10/2007 12/11/2007 22/12/2007 31/01/2008

Date

Ascen

sio

n d

roit

e (

deg

)

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Evolution de l'Ascension Droite du Noeud Ascendant de l'orbite COROT

en fonction de l'amplitude de la manoeuvre d'inclinaison d'avril 2008

0,00

2,00

4,00

6,00

8,00

10,00

12,00

14,00

16,00

18,00

01/04/2008 01/10/2008 01/04/2009 01/10/2009 01/04/2010 01/10/2010 01/04/2011 01/10/2011 01/04/2012

Date

RA

AN

da

ns

J2

00

0 (

de

g)

Di = 0.00 deg

Di = -0.05 deg

Di = -0.10 deg

Di = -0.125 deg

Di = -0.15 deg

Di = -0.175 deg

Di = -0.20 deg

Dérive 4° / anpendant 2 ans

Graphique SB/MS (Philippe Gamet)

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Operations scheduled in April 08

■SRa01 End of SRa01 : 08/03/31

■Orbit Plan Inclination Maneuvers Inertial Pointing + Transition in VLE_PBS + 1st OCM2 Maneuver : 08/03/31 Calibration by TAS based on 1st Maneuver : 08/04/01 (Orbit restitution) + maneuver programming + thrusts executions : once set

of activities each day from 08/04/02 to 08/04/05 (saturday) Reversal Pointing towards waiting attitude (Sun constraint) : 08/04/05 Inertia Pointing + Last Maneuver : 08/04/07 Orbit restitution : 08/04/08

■Payload SW upload (V500) from 08/03/31 to 08/04/04

■Pointing and Ops for LRc02 from 08/04/09 to 08/04/15 (at the latest)

■Start of LRc02 (EXO) : 08/04/15

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The Next RunsOBS Durations

0

20

40

60

80

100

120

140

160

SRa01 LRc02 SRc02 SRa02 LRa02

Days

Série1

Série2

Série3

Série4

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CNES LAM

LESIA

IAS

N1A

larm

N2

N0

N1AlarmN1Alarm

Oversampled list

CoIs & GIs

N1r

eady

forN

2

N1 Alarm Production at CNES :Mid of May

corot : 27th scientific committee€¦ · 27th scientific committee : 2008/03/14 durations of the...

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