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Goddard Space Flight Center

HST Project Status !

Presentation to:""Space Telescope Userʼs Committee!Patrick Crouse"HST Operations Project""6 April 2011 !

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Goddard Space Flight Center Topics"

●  Observatory Status"

●  Automated Operations Development"

●  Presidentʼs 2012 Budget"

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Goddard Space Flight Center

OBSERVATORY STATUS

•  Thermal performance of Equipment Bays with new NOBLs tracking predictions well

•  Condition of MLI observed during SM4 was as expected; degradation continuing

•  NOBLs installed on Bays 5, 7 and 8 during SM4

Thermal Performance

•  No performance liens •  On/off cycles for the Multi-access & S-band

Single-access transmitters are accumulating Communications

•  SI C&DH-R •  SI C&DH Lock Up Anomaly •  Science Data Formatter (SDF) Temperature Data Mgmt System

•  6-4-5 gyro configuration; G3 powered off •  Gyro 4 switched to its secondary heater controller on 10/27 •  ARB formed and ground testing underway •  FGS-3 use reduced to preserve bearings

•  Gyro 3 performance degradation •  FGS-1R Excellent •  FGS-2R2 Excellent •  FGS-3 Degraded (Bearing performance sub-par;

higher torques required)

Pointing Control System

•  Performance of new batteries is excellent; benchmark set to 510 Ampere-Hours

•  SA3 performing very well (~76 of 80 strings) Electrical Power System

•  Process for the NCS purge and dry neon refill has been selected; further action pending Cycle 19 Proposal evaluations

•  COS FUV detector sensitivity is degrading −  ARB Final Report April 5, 2011

•  WFC3 Excellent •  COS FUV detector sensitivity degradation •  ACS WFC repaired (single-string) •  STIS Repaired (single-string) •  NICMOS Instrument excellent, NCS safed

Science Instruments

Status/Comments

Summary ���

Subsystem

G

G

G

G

Y

G

•  Payload computer recovered from 4 since June 15, 2009 •  September 9, 2010 event left HV power up to MAMAs •  STIS, COS, and ACS FSW enhancements installed •  Implementing updated SDF Input Cycling (to match Output

Cycling)

•  MAT2 now used in Coherent Mode full time −  Enables automation of HST tracking

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Goddard Space Flight Center Target Acquisition Performance

and Gyro 3"

●  Up to 20% of HST weekly orbits were impacted by a gyro anomaly between January to mid-March; impacting as much as 25% of the science plan"

–  Historical performance has been less than 3%!–  Some science observations delayed a year or more as a result!–  Performance was expected to worsen!–  Estimate that little to no science would have been able to be performed by early

May without a change!

●  Anomaly is similar to that addressed by 2005 Anomaly Review Board"

●  Recommended steps from that 2005 board had already been implemented with expected improvement seen, but since overwhelmed"

●  Additional mitigation steps, known to provide only temporary improvement, were implemented in mid-February 2011"

●  Powered up Gyro 6 on March 16"

●  Swapped Gyro 6 for Gyro 3 on March 18 - returning normal performance"

●  New ARB analyzing flight data and executing ground testing"

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Goddard Space Flight Center Observatory Status"

●  Spacecraft bus subsystems "–  SI C&DH Lock Up results in Multi-Anode Microchannel Array (MAMA) Detectors

High Voltage power supplies left on; STIS, COS and ACS FSW enhanced to mitigate risk!

–  Science Data Formatter (SDF) thermal challenge!•  Replaced SDF runs warmer, approaching limits during the “hot” season!•  STScI used a thermal model to develop observation plan to manage !•  Modifying commanding to cycle the input with the output to reduce the thermal load in time

for the next “hot” season!

●  Science Instruments"–  All Science Instruments except NICMOS are fully operational!

–  COS FUV sensitivity degradation is being monitored!–  COS FUV High Voltage returned to launch setting to mitigate gain sag!

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Goddard Space Flight Center

Automation will perform four fundamental operations:"1.  Monitor telemetry and alert operations staff if anomalous

conditions occur"

2.  Perform routine commanding to ensure continued science operations and prevent vehicle safing"

3.  Collect science data from the solid state recorders"

4.  Collect tracking data"

The Goal is to enable Monday – Friday single shift operations while providing health and safety monitoring and science data

recovery consistent with 24/7 staffed operations"

Automated Operations Development (AOD)"

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Goddard Space Flight Center Staffing Changes/FTE Savings

●  Transition HST from a 24x7 to an 8x5 operations paradigm –  Historically – Separate FOT, DOC, PACOR teams; FOT and DOC (24x7), PACOR (16x5) –  Automated Operations will utilize a “Consolidated Flight Operations Team (FOT)” that

integrates Data Operations Center (DOC) and Packet Processor (PACOR) functions with existing real-time command and control functions

–  One shift during the normal workday, Mon – Fri, 8am-5pm. Off-hour on-call coverage. –  Total FOT team size reduced from 34 (end of FY10) to 10 via cross-training and automation

Su M Tu W Th F Sa FOT 3 (Graveyard)

FOT 2 (Day)

FOT 1 (Swing)

Current Operations

Su M Tu W Th F Sa

FOT (Day Only)

Automated Operations

Staffing

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Goddard Space Flight Center Automated Operations Development (AOD)"

Status"

●  Successfully conducted first automated pass on September 2010"–  Performed routine commanding, and data collection!–  Loaded HST 486 and NSSC-1 computers!–  Automation Command Engine (ACE) perform routine commanding!

●  Key Monitor health and safety monitoring began January 31"

●  Flight tested the command buffering capability (QBF) last week to utilize the 486 to meter loads into the NSSC-1 and extend response time prior to list exhaust"

●  Ground System Readiness Review planned for April 19"

●  Operations Readiness Review planned May 13"

●  FOT 8 x 5 Operations in June"

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Goddard Space Flight Center Potential Impact of Automated Operations"

●  Increased latency of data recovery if re-dump required"

●  Marginal loss of science data"

●  Due to the reduction in staff, recovery from anomalies may take longer due to both increased durations for investigation and recovery"

Current Operations Automated Operations 1 - 2 Day spacecraft (S/C) Safemode Recovery

2 - 4 Day S/C Safemode Recovery

Payload Safemode Recovery Ø  3 days for single event upset (SEU) type

anomalies Ø  1 wk – 2 months for failure type anomalies

Payload Safemode Recovery Ø  5 days for SEU type anomalies

Ø  2 wks – 3 months for failure type anomalies

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Goddard Space Flight Center Presidentʼs 2012 Budget Submit"

●  Reduces HST budget authority by $30M for 2012-2016 over 2011 Submit"

●  Pending resolution of the FY 2011 budget, the Project does not expect any impact to STScI through FY 2013"

●  Formal programmatic guidance received last week"

●  Project budget submission for FY 2012-FY 2017 due to HQ Astrophysics Division in Early May"

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