Upload
victor-richards
View
218
Download
0
Embed Size (px)
DESCRIPTION
Solar Probe Plus A NASA Mission to Touch the Sun Solar Probe Plus FIELDS Instrument Suite Date Backup
Citation preview
Solar Probe PlusA NASA Mission to Touch the Sun
Solar Probe Plus FIELDS Instrument Suite Date
Like
lihoo
d of
Occ
urre
nce
(pro
babi
lity)
Consequence of Occurrence (Impact)
5
4
3
2
1
1 2 3 4 5
High Medium Low (Criticality)P = PerformanceC = CostS = ScheduleM = Mass
PF1
Evaluation Date: 06/25/12
PF2
CSF3
PF5PF6
PF7PSF9
FIELDS Instrument Risks Status
ID TITLE P I Crit Retire At
F3 Foreign Funding Issues 4 4H CNES Phase C Commit.
(~12/13)F9 Magnetic Sensor Qualification 3 4 M MAG Thm Test by I-CDR (~1/15)
F12 Magnetic Cleanliness 4 3M
Mission I&T (~8/16)
F13 Third axis electric field measurement 4 3M
Study Completion (~8/12)
F7 ElectroStatic Contamination 3 3M
Mission I&T (~8/16)
F5 Survival Thermal Environment 2 4M
SCM & MAG Env. Qual (~11/14)
F10 Antenna Qualification 2 3L
Ant. Qual (~3/13)
F6 Magnetic Sensor Interference 2 3L
ETU I&T (~8/14)
F11 SCM dependence on Solar Orbiter 2 2L
SO FLT SCM Complete
F1S/C Conducted and Radiated Noise
Contamination 1 3L
Mission I&T (~8/16)
F2 Plasma Wake Effects 1 3L
Mission CDR (~3/15)
CSF10CSF11
PF12
Mitigation Plans in Place for All FIELDS Risks
PF13SF14
Solar Probe PlusA NASA Mission to Touch the Sun
Solar Probe Plus FIELDS Instrument Suite Date
Risk Notes: June 2012
1) F13 - Phase B Schedule Risk (chart 17): - impact & status need to be reassessed; pending ongoing review/discussions re. the recently received Phase B contract
2) F3 - Foreign Funding (commitment) (chart 7): - On 5/8 the FIELDS team learned that due to the heavy workload on the RPW/TNR-HFR team and the currently tight schedule fr the RPW/Solar Orbiter, LESIA cannot commit as initially planned for a full development and building of the FIELDS TNR/HFR. - At that time, the likelihood for risk F3 was increased from a 1 to a 4- Alternative to TNR/HFR presented on 6/12 and further information received on 7/2.
Evaluation of options for how to proceed is ongoing.- UCB will implement budget/schedule for replacement option by 9/12, bringing risk F3 back to green- Will then open a new technical risk to track the development of the new TNR/HFR option
3) F8 – Magnetic Sensor/SCM Dynamic Range (chart 11): - Risk Retired. Decision made to sample the MAG faster to cover the gap in frequency
Solar Probe PlusA NASA Mission to Touch the Sun
Solar Probe Plus FIELDS Instrument Suite Date
Backup
Solar Probe PlusA NASA Mission to Touch the Sun
Solar Probe Plus FIELDS Instrument Suite Date
FIELDS Phase B Risks Mitigation
FIELDS Risk Mitigation activities for Phase B include:
Antenna Qualification:• Nb materials testing, optical props aging (~Feb to Apr ‘12 TBR (was 3/12), MSFC
or EMTL (was Odeillo, France))• Antenna model thermal testing (~Oct ‘12 to Jan ‘13 (was 3/13), Odeillo, France)• Additional contingency test, if needed (~Oct ‘13, Odeillo, France)
SCM / MAG / FGM Trade:• Determine the optimal technical (dynamic range) & resource (mass and thermal)
solution (close by 4/12)• See Trades Slide for additional information.
MAG Performance Over Temperature:• MAG Cold Operations Test (~1/13)• MAG Thermal Cycling Test (end of Phase B)
MAG/SCM Interference:• MAG/SCM Interference test (similar to the MAG/FGM test performed in 7/11)
(~5/12 TBR (was 4/13), Chambon, France)Blue = change since MDR
Solar Probe PlusA NASA Mission to Touch the Sun
Solar Probe Plus FIELDS Instrument Suite Date
P = PerformanceC = CostS = ScheduleM = Mass
ID Risk Mitigation PlanF1-P: S/C Conducted and Radiated Noise Contamination
Event Date
Assessment**Likeli-hood
Conse-quence
Risk Grade
A EMI/EMC Plan Draft prior to I-PDR 06/13 1 3 3B EMI/EMC Plan Final prior to I-CDR 01/15 1 3 3C EMC verification at Mission I&T 08/16 Retire Risk
* Grade = Likelihood x Consequence ** Assessment is the remaining risk assessed after successful event completion
Ris
k G
rade
25
20
15
10
5
Risk F1-P: S/C Conducted and Radiated Noise ContaminationCurrent
Assessment LOW
Likelihood Consequence Risk Grade
Risk Statement
If S/C design does not include EMI shielding and EMC mitigations 1 3 3
Then FIELDS will not be able to measure small signals as required Last Updated 08/10/11
PlanActual
Level Risk Grade*High 15-25Medium 6-12
Low 1-6
F1-P: Risk Burn Down
Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q42011 2012 2013 2014 2015 2016
B CA
Solar Probe PlusA NASA Mission to Touch the Sun
Solar Probe Plus FIELDS Instrument Suite Date
ID Risk Mitigation PlanF2-P: Plasma Wake Effects
Event Date
Assessment**Likeli-hood
Conse-quence
Risk Grade
A Accept risk at Mission CDR when design freezes with adequate boom length. 03/15 Retire Risk
* Grade = Likelihood x Consequence ** Assessment is the remaining risk assessed after successful event completion
Ris
k G
rade
25
20
15
10
5
Risk F2-P: Plasma Wake EffectsCurrent
Assessment LOW
Likelihood Consequence Risk Grade
Risk Statement
If S/C plasma wake effects are as large as predicted, 1 3 3
Then near-S/C electric field sensors will be compromised. Last Updated 08/10/11
F2-P: Risk Burn Down
Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q42011 2012 2013 2014 2015 2016
A
P = PerformanceC = CostS = ScheduleM = Mass
PlanActual
Level Risk Grade*High 15-25Medium 6-12
Low 1-6
Solar Probe PlusA NASA Mission to Touch the Sun
Solar Probe Plus FIELDS Instrument Suite Date
ID Risk Mitigation PlanF3-CS: Foreign Funding Issues
Event Date
Assessment**Likeli-hood
Conse-quence
Risk Grade
A Fund backup options for TNR and SCM 09/11 4 4 16
B Decision to proceed with foreign sources for SCMRemove TNR/HFR from CNES and select alternate option for TNR/HFR 06/12 3 4 12
CCNES proposal for next phase (SCM)Implement replacement plan for TNR/HFR include budget/schedule & open new technical risk capturing the technical development of the new option
09/12 1 4 4
D KDP-C 11/13 1 4 4E CNES Phase C Commitment 12/13 (TBR) Retire Risk
* Grade = Likelihood x Consequence ** Assessment is the remaining risk assessed after successful event completion
Ris
k G
rade
20
15
10
5
Risk F3-CS: Foreign Funding IssuesCurrent
Assessment HIGH
Likelihood Consequence Risk Grade
Risk Statement
If foreign funding sources fail 4 4 16
Then we may lose the search coil sensors or electronics Last Updated 05/21/12
F3-CS: Risk Burn Down
Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q42011 2012 2013 2014 2015 2016
A
P = PerformanceC = CostS = ScheduleM = Mass
PlanActual
Level Risk Grade*High 15-25Medium 6-12
Low 1-6
BC
D E
Solar Probe PlusA NASA Mission to Touch the Sun
Solar Probe Plus FIELDS Instrument Suite Date
ID Risk Mitigation PlanF5-P: Survival Thermal Environment
Event Date
Assessment**Likeli-hood
Conse-quence
Risk Grade
A Preliminary thermal analysis/test to confirm if the thermal design is adequate 06/12 2 4 8B GSFC MAG Ops & Survival Thermal Test 06/12 1 4 4C APL test high-efficiency blankets on MAG Boom mock-up (prior to ETU Env. Test). 08/14 (TBR) 1 4 4D SCM & MAG Environmental Qualification 11/14 Retire Risk
* Grade = Likelihood x Consequence ** Assessment is the remaining risk assessed after successful event completion
Ris
k G
rade
25
20
15
10
5
Risk F5-P: Survival Thermal EnvironmentCurrent
Assessment Medium
Likelihood Consequence Risk Grade
Risk Statement
If the survival thermal environment for the SCM and MAG does not meet the sensors’ minimum temperature requirements, 2 4 16
Then additional heater power will be required to avoid instrument failure. Last Updated 09/13/11
D
F5-P: Risk Burn Down
Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q42011 2012 2013 2014 2015 2016
CAB
P = PerformanceC = CostS = ScheduleM = Mass
PlanActual
Level Risk Grade*High 15-25Medium 6-12
Low 1-6
Solar Probe PlusA NASA Mission to Touch the Sun
Solar Probe Plus FIELDS Instrument Suite Date
ID Risk Mitigation PlanF6-P: Magnetic Sensor Interference
Event Date
Assessment**Likeli-hood
Conse-quence
Risk Grade
A MAG Boom design accommodates >1m separation by I-PDR 06/13 1 3 3B ETU I&T complete 08/14 Retire Risk
* Grade = Likelihood x Consequence ** Assessment is the remaining risk assessed after successful event completion
Ris
k G
rade
25
20
15
10
5
Risk F6-P: Magnetic Sensor InterferenceCurrent
Assessment LOW
Likelihood Consequence Risk Grade
Risk Statement
If the MAG and SCM sensors are too close, 2 3 6
Then their interference will compromise the magnetic measurements. Last Updated 08/10/11
AB
F6-P: Risk Burn Down
Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q42011 2012 2013 2014 2015 2016
P = PerformanceC = CostS = ScheduleM = Mass
PlanActual
Level Risk Grade*High 15-25Medium 6-12
Low 1-6
Solar Probe PlusA NASA Mission to Touch the Sun
Solar Probe Plus FIELDS Instrument Suite Date
ID Risk Mitigation PlanF7-P: Electro Static Contamination
Event Date
Assessment**Likeli-hood
Conse-quence
Risk Grade
A ESC plan draft complete, prior to I-PDR 06/13 2 3 6B ESC plan final, prior to I-CDR 01/15 1 3 3C ESC verified at Mission I&T 8/16 Retire Risk
* Grade = Likelihood x Consequence ** Assessment is the remaining risk assessed after successful event completion
Ris
k G
rade
25
20
15
10
5
Risk F7-P: Electro Static ContaminationCurrent
Assessment MEDIUM
Likelihood Consequence Risk Grade
Risk Statement
If the S/C has areas that charge up, 3 3 9
Then their potential will compromise the electric field measurements. Last Updated 08/10/11
F7-P: Risk Burn Down
Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q42011 2012 2013 2014 2015 2016
AB
C
P = PerformanceC = CostS = ScheduleM = Mass
PlanActual
Level Risk Grade*High 15-25Medium 6-12
Low 1-6
Solar Probe PlusA NASA Mission to Touch the Sun
Solar Probe Plus FIELDS Instrument Suite Date
ID Risk Mitigation PlanF8-PSM: Magnetic Sensor / SCM Dynamic Range
Event Date
Assessment**Likeli-hood
Conse-quence
Risk Grade
AMAG/FGM Trade Closure SCM Dynamic range portion is retired, the SCM/MAG compatibility is still an issue 6/25/12: decision made to cover gap in dynamic range by sampling the MAG faster
6/12 Retired Risk
* Grade = Likelihood x Consequence ** Assessment is the remaining risk assessed after successful event completion
Ris
k G
rade
25
20
15
10
5
Risk F8-PSM: Magnetic Sensor / SCM Dynamic RangeCurrent
Assessment Retired
Likelihood Consequence Risk Grade
Risk Statement
If the combined MAG & SCM concept does not cover the required dynamic range and bandwidth, 3 3 9
Then there may be a loss of data in certain frequency bands. Last Updated 06/25/2012
A
F8-PSM: Risk Burn Down
Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q42011 2012 2013 2014 2015 2016
P = PerformanceC = CostS = ScheduleM = Mass
PlanActual
Level Risk Grade*High 15-25Medium 6-12
Low 1-6
Risk Retired
Solar Probe PlusA NASA Mission to Touch the Sun
Solar Probe Plus FIELDS Instrument Suite Date
ID Risk Mitigation PlanF9-PS: Magnetic Sensor Qualification
Event Date
Assessment**Likeli-hood
Conse-quence
Risk Grade
A Plan thermal testing of a representative MAG sensor (by I-PDR) 11/13 2 4 8B MAG Thermal Test by FIELDS Instrument CDR 12/14 Retire Risk
* Grade = Likelihood x Consequence ** Assessment is the remaining risk assessed after successful event completion
Ris
k G
rade
25
20
15
10
5
Risk F9-PS: Magnetic Sensor QualificationCurrent
Assessment MEDIUM
Likelihood Consequence Risk Grade
Risk Statement
If the MAG sensor is not qualified for the number of operational thermal cycles, 3 4 12
Then the sensor may fail in orbit. Last Updated 08/10/11
AB
F9-FS: Risk Burn Down
Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q42011 2012 2013 2014 2015 2016
P = PerformanceC = CostS = ScheduleM = Mass
PlanActual
Level Risk Grade*High 15-25Medium 6-12
Low 1-6
Solar Probe PlusA NASA Mission to Touch the Sun
Solar Probe Plus FIELDS Instrument Suite Date
ID Risk Mitigation PlanF10-PS: Antenna Qualification
Event Date
Assessment**Likeli-hood
Conse-quence
Risk Grade
A Obtain Nb materials for testing - complete 01/12 2 3 6
B Nb material testing, Glenn Research Ctr, Southern Research, MSFC, APL, Surface Optics
2/12 – 8/12 1 3 3
C Antenna ETU thermal testing; Antenna Qualification Complete 03/13 Retire Risk
* Grade = Likelihood x Consequence ** Assessment is the remaining risk assessed after successful event completion
Ris
k G
rade
25
20
15
10
5
Risk F10-PS: Antenna QualificationCurrent
Assessment Low
Likelihood Consequence Risk Grade
Risk Statement
If the antenna cannot be qualified to meet thermal requirements, 3 3 6
Then the antenna will need to be re-designed. Last Updated 04/19/2012
A
C
F10-PS: Risk Burn Down
Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q42011 2012 2013 2014 2015 2016
P = PerformanceC = CostS = ScheduleM = Mass
PlanActual
Level Risk Grade*High 15-25Medium 6-12
Low 1-6
B
Solar Probe PlusA NASA Mission to Touch the Sun
Solar Probe Plus FIELDS Instrument Suite Date
ID Risk Mitigation PlanF11-S: SCM Dependence on Solar Orbiter
Event Date
Assessment**Likeli-hood
Conse-quence
Risk Grade
A Solar Orbiter ETU complete TBD 1 2 2B Re-plan SCM ETU testing as needed TBD 1 2 2C Re-plan SCM FLT integration as needed TBD 1 2 2D SO Flight SCM Complete TBD Retire Risk
* Grade = Likelihood x Consequence ** Assessment is the remaining risk assessed after successful event completion
Ris
k G
rade
25
20
15
10
5
Risk F11-S: SCM Dependence on Solar OrbiterCurrent
Assessment LOW
Likelihood Consequence Risk Grade
Risk Statement
If Solar Orbiter is delayed, 2 2 4
Then the SCM for FIELDS delivery will be delayed. Last Updated 08/10/11
AB C D
F11-S: Risk Burn Down
Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q42011 2012 2013 2014 2015 2016
P = PerformanceC = CostS = ScheduleM = Mass
PlanActual
Level Risk Grade*High 15-25Medium 6-12
Low 1-6
Solar Probe PlusA NASA Mission to Touch the Sun
Solar Probe Plus FIELDS Instrument Suite Date
ID Risk Mitigation PlanF12-P: Magnetic Cleanliness
Event Date
Assessment**Likeli-hood
Conse-quence
Risk Grade
A Magnetics plan draft (prior to I-PDR) 06/13 3 3 9B Magnetics plan final (prior to I-CDR) 01/15 2 3 6C Design freeze at M-CDR confirms long-enough MAG Boom 03/15 1 3 3D Magnetics verified at Mission I&T 08/16 Retire Risk
* Grade = Likelihood x Consequence ** Assessment is the remaining risk assessed after successful event completion
Ris
k G
rade
25
20
15
10
5
Risk F12-P: Magnetic CleanlinessCurrent
Assessment MEDIUM
Likelihood Consequence Risk Grade
Risk Statement
If the S/C exhibits high residual magnetic fields (AC or DC), 4 3 12
Then the magnetic measurements will be contaminated. Last Updated 08/10/11
AB
CD
F12-P: Risk Burn Down
Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q42011 2012 2013 2014 2015 2016
P = PerformanceC = CostS = ScheduleM = Mass
PlanActual
Level Risk Grade*High 15-25Medium 6-12
Low 1-6
Solar Probe PlusA NASA Mission to Touch the Sun
Solar Probe Plus FIELDS Instrument Suite Date
ID Risk Mitigation PlanF12-P: Magnetic Cleanliness
Event Date
Assessment**Likeli-hood
Conse-quence
Risk Grade
A Study the possibility of making a simple surface voltage measurement on the MAG boom as a baseline for the sunward electric field 08/2012 Retire Risk
* Grade = Likelihood x Consequence ** Assessment is the remaining risk assessed after successful event completion
Ris
k G
rade
25
20
15
10
5
Risk F13-P: Third Axis Electric Field MeasurementCurrent
Assessment MEDIUM
Likelihood Consequence Risk Grade
Risk Statement
If S/C electrostatic center is near the TPS and highly variable, 4 3 12
Then FIELDS will fail to measure the sunward electric fields. Last Updated 01/04/2012
A
F13-P: Risk Burn Down
Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q42011 2012 2013 2014 2015 2016
P = PerformanceC = CostS = ScheduleM = Mass
PlanActual
Level Risk Grade*High 15-25Medium 6-12
Low 1-6
Solar Probe PlusA NASA Mission to Touch the Sun
Solar Probe Plus FIELDS Instrument Suite Date* Grade = Likelihood x Consequence ** Assessment is the remaining risk assessed after successful event completion
Ris
k G
rade
25
20
15
10
5
Risk F14-S: Phase B ContractCurrent
Assessment MEDIUM
Likelihood Consequence Risk Grade
Risk Statement
If the UCB Phase B contract or UCB Phase B subcontracts lapse (due to insufficient lead time to get subcontracts to teammates), 4 2 8
Then then the early Phase B deliverables and testing schedule will be delayed. Last Updated 04/19/2012
A
F14-S: Phase B Contract
Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q42011 2012 2013 2014 2015 2016 P = Performance
C = CostS = ScheduleM = Mass
PlanActual
Level Risk Grade*High 15-25Medium 6-12
Low 1-6
ID Risk Mitigation PlanF11-S: SCM Dependence on Solar Orbiter
Event Date
Assessment**
Likeli-hood
Conse-quence
Risk Grade
A Phase B contracts (to UCB and teammates) in place TBD 4 1 4
B Replan of early Phase B deliverables & testing complete TBD Retire Risk
B