# Presentation: 692999

## MONTHLY STATUS REVIEW 

**MONTHLY STATUS REVIEW**** **
**EOS ICE, CLOUD & LAND ELEVATION**
** ****SATELLITE (ICESat) PROJECT**
**Code 425**
**UPN 227-6**
**   ****	****   ****Project Scientist:                          Dr. J. Zwally**** ****/**** ****971**
**	****   ****Project Manager:                          James Watzin**** ****/**** ****425**
**	****   ****Deputy Project Manager:             Gregory Smith**** ****/**** ****425**
**	****   ****DPM**** ****/**** ****Resources:                          Linda Greenslade**** ****/**** ****425**
**	****   ****Instrument Development:            Dr. J. Abshire**** ****/**** ****924**
**	****   ****Ground System Development:    ESDIS**** ****/**** ****423**
**	****   ****Spacecraft Contractor:                 Ball**

**February 12, 2002**

## ICESat PROJECT SUMMARY

**ICESat PROJECT SUMMARY**
**STATUS AS OF:  1/31/02**

_**LEGEND**_

**Good Shape**

**Minor Problem**

**Major Problem**

**Program Management**

**Subcontracts**

**Spacecraft I&T**

**Observatory I&T**

**Subsystems**

**Systems Engineering**

**R&D Budget**

**Procurement**

**Workforce**

**Travel**

**Launch Vehicle**

**Launch Site (VAFB)**

**Ground SYS**** ****/**** ****OPS (EOS)**

**GLAS**

**Technical         Cost          Schedule        Overall**

** ****NOV  DEC   JAN**

**Spacecraft Bus:**

**Prime**

**Major Interfaces**

**Resources**

**Instruments**

**Business**

**Science**** ****/**** ****Operations**

**Summary Assessment**

**Y**

**R**

**R**
**G**
**G**
**G**

**Y**

**JPL GPS Receivers**

**G**
**G**
**G**
**G**

**G**
**G**
**G**
**G**

**G**
**G**
**G**
**G**

**GLAS**

**Y**

**Y**

**R**

**Y**

**G**
**G**
**G**
**G**
**G**
**G**

** ****NOV  DEC    JAN**

** ****NOV   DEC   JAN**

** ****NOV   DEC   JAN**

**  ****NOV  DEC   JAN**

** ****NOV  DEC   JAN**

**G**
**G**
**G**
**G**
**G**
**G**

**R**
**G**
**G**
**G**

**R**
**G**
**G**
**G**

**G**

**G**

**G**

**R**
**G**
**G**
**G**

**R**
**G**
**G**
**G**

**R**

**R**

**G**

**G**
**G**
**G**
**G**
**G**
**G**

**R**
**G**
**G**
**G**

## ICESat SIGNIFICANT PROGRESS

**ICESat SIGNIFICANT PROGRESS**

**STATUS AS OF:   1/31/02**

**COMPLETED A SERIES OF GLAS FUNCTIONAL TESTS WHICH WILL PROVIDE A BASIS FOR THE COMPREHENSIVE PERFORMANCE TEST**
**COMPLETED A SERIES OF GLAS FUNCTIONAL TESTS WHICH WILL PROVIDE A BASIS FOR THE COMPREHENSIVE PERFORMANCE TEST.**
**GLAS EMI TESTING BEGAN ON 2**** ****/**** ****1**** ****/**** ****02**
**LASER (SN 001) OPTICAL REWORK COMPLETED.  CURRENTLY BEING CHARACTERIZED IN THERMAL VACUUM.  RESULTS TO DATE ARE NOMINAL.**
**LASER (SN 005) ELECTRONICS BOARD RETURNED TO VENDOR TO BE READIED FOR INSTALLATION IN LASER (SN 003)**
**MISSION OPERATIONS WORKING GROUP MEETING HELD ON 1**** ****/**** ****30**** ****/**** ****02.  NO MAJOR ISSUES SURFACED.  TESTING PROCEEDING AS PLANNED.**

## SCHEDULE

**Codes 400 and 500 are discussing ways to contain this problem**
**Expedite thermal performance evaluation of optical system**
**Conduct overall ICESat development and personnel assessment. **
**Develop revised mission schedule**

**CURRENT STATUS**
**Working hard to preserve October-December 2002 LRD.**
_**Developed new GLAS I&T schedule that includes laser rework and early EMI test resulting in minimal schedule impact.  Aggressively working all I&T issues.  Optimizing remaining mission schedule.**_

**SCHEDULE**
**STATUS AS OF:   1/31/02**

**       ****PROBLEM**** ****/**** ****ISSUES          PROGRAMMATIC IMPACT                        ACTION**

**R**

**Latest GLAS completion schedule causes impact to LRD.**

**GLAS component rework cycles continue to erode GLAS integration and test schedule; longer GLAS integration effort needed**
_**GLAS CPT only partially completed.  Some problems under investigation.  Instrument scientists struggling to interpret the data.**_

**          ****DATE**
**   ****ESTAB  COMPL**
**  ****10**** ****/**** ****15     11**** ****/**** ****1**
**    ****Complete**
**   ****10**** ****/**** ****15   11**** ****/**** ****30**
**  ****Test removed**
**   ****issue closed**
**   ****11**** ****/**** ****15  1**** ****/**** ****30**
**       ****Closed**
**   **_**11/15**_**    **_**2/15**_

##                    GLAS I&T PROBLEMS IN WORK

**Laser S/N 001 failed during instrument integration operations**

**CURRENT STATUS**
**Fault traced to a failed amplifier diode array assembly, amplifier module replaced.**
**Subsequent capacitor failure during vibration test revealed deficient design of electronics board.  Design modification options in development.**
_**Decision made to replace existing board in each laser with new boards.**_

**                   ****GLAS I&T PROBLEMS IN WORK**
**LASERS**
**STATUS AS OF:   1/31/02**

**       ****PROBLEM/ISSUES            PROGRAMMATIC IMPACT                        ACTION**

**          ****DATE**
**   ****ESTAB  COMPL**
**    ****11/29    2/15**
**    **_**1/28**_**     **_**3/15**_

**R**

**Loss of 1/3 of instrument lifetime.**
**Initial estimate is 2-3 month impact to GLAS integration and delivery schedule**

**Replace amplifier stage.**
_**Replace electronics board in all 3 lasers**_

##                    GLAS I&T PROBLEMS IN WORK

**GLAS bore sight stability does not meet mission performance requirements**** **

**CURRENT STATUS**
**Peer Review held**
**Retest conducted; preliminary results look favorable with major errors traceable to set-up issues.  Detailed data analysis results look promising.**
**Additional analysis initiated on the telescope assembly.**
_**Test plan defined.**_

**                   ****GLAS I&T PROBLEMS IN WORK**
**OPTICAL PATH**
**STATUS AS OF:   1/31/02**

**       ****PROBLEM/ISSUES            PROGRAMMATIC IMPACT                        ACTION**

**          ****DATE**
**   ****ESTAB  COMPL**
**    ****11/30    2/28**

**R**

**Fundamental measurements may be compromised if behavior persists on orbit.**

**Hold mini-peer review on calibration results**
**Get AETD and systems involvement in development of troubleshooting plan.**

##                    GLAS I&T PROBLEMS IN WORK

**Intermittent energy monitor on green laser**

**CURRENT STATUS**
**Several troubleshooting tests conducted, inconclusive results.**
**Alternate Etalon operation algorithms in development.**
_**Problem understood and board modification solution verified on the engineering model board.  Alternative (baseline) software approaches being investigated and validated.**_

**                   ****GLAS I&T PROBLEMS IN WORK**
**LIDAR OPERATION**
**STATUS AS OF:   1/31/02**

**       ****PROBLEM/ISSUES            PROGRAMMATIC IMPACT                        ACTION**

**          ****DATE**
**   ****ESTAB  COMPL**
**   ****12/17    2/15**

**Y**

**Potential compromise on Etalon operation and data reduction**

**Investigate root cause**
**Investigate alternate means for Etalon operation and data reduction**

## PMC ACTION STATUS

_**NONE**_

**PMC ACTION STATUS**

_**Data**__** **__**/**__** **__**Source**_

_**Status**_

**STATUS AS OF:   1/31/02**

## REBASELINED ICESat PROJECT

**REBASELINED ICESat PROJECT**
**SCHEDULE**
**February 12, 2002**
**J. Watzin**

## ASSESSMENT PERIOD SUMMARY

**ASSESSMENT PERIOD SUMMARY**
**(11**** ****/**** ****15**** ****/**** ****01 – 2**** ****/**** ****15**** ****/**** ****02)**

**REVIEWED GSFC TEAM**
**MADE SEVERAL PERSONNEL CHANGES TO STRENGTHEN TECHNICAL DEPTH AND IMPROVE COMMUNICATION**
**FOUND A HIGHLY MOTIVATED AND TECHNICALLY COMPETENT INSTRUMENT TEAM THAT WAS FUNCTIONING SOMEWHAT UNEVENLY**
**CUTTING EDGE INSTRUMENT SYSTEM**
**HIGH TURNOVER IN PERSONNEL**
**INEXPERIENCED PERSONNEL, LITTLE MENTORING**
**LOST EXPERTS IN HIGH-RISK TECHNOLOGIES**
**DELETION OF ETU EFFORT**
**UNNECESSARY ORGANIZATIONAL BARRIERS**

## ASSESSMENT PERIOD SUMMARY

**ASSESSMENT PERIOD SUMMARY**
**(11**** ****/**** ****15**** ****/**** ****01 – 2**** ****/**** ****15**** ****/**** ****02) - continued**

**WEATHERED MULTIPLE, MAJOR HARDWARE FAILURES ON GLAS**
**LASER S**** ****/**** ****N #1 AMPLIFIER BLOW-OUT**
**LASER S**** ****/**** ****N #3 DOUBLER HEATER CONTROLLER COUNTER FAILURE**
**SPCM #3 FAILURE**
**INTERMITTENT ENERGY MONITOR ON GREEN LASER**
**MECHANICAL FAILURE IN LASER POWER SUPPLY**
**ADDRESSED SIGNIFICANT GLAS TECHNICAL ISSUES**
**UNCERTAIN BORE-SITE ALIGNMENT**
**PARTIALLY DEFINED TEST PROGRAM**
**REVIEWED BALL SPACECRAFT STATUS – GOOD SHAPE**
**REVIEWED LASP OPERATIONAL STATUS – GOOD SHAPE**

## RECENT ACCOMPLISHMENTS

**RECENT ACCOMPLISHMENTS**

**GLAS INSTRUMENT INTEGRATED (WITH LIENS)**
**SIGNIFICANT PROGRESS IN UNDERSTANDING THE GLAS BORE-SITE ISSUE**
**SOLUTIONS DEVELOPED FOR ALL MAJOR GLAS HARDWARE FAILURES**
**CORE CPT TESTS RUN**
**EMI TESTING IN-WORK**
**SHIFTED TO A “DYNAMIC SCHEDULING” APPROACH THAT HAS MAINTAINED DEVELOPMENT PROGRESS DESPITE MAJOR PROBLEMS**

## REBASELINE CONSIDERATIONS

**REBASELINE CONSIDERATIONS**

**SIGNIFICANT UNCERTAINTY STILL CLOUDS THE DELIVERY HORIZON FOR GLAS INSTRUMENT**
**ALL THREE GLAS LASERS STILL REQUIRE REWORK**
**INSTRUMENT FUNCTIONAL AND PERFORMANCE TEST BASELINE IS NOT YET COMPLETE NOR UNENCUMBERED FROM ANOMALIES**
**HIGHEST RISK ENVIRONMENTAL TESTS (VIBRATION, ACOUSTICS,  T**** ****/**** ****V) REMAIN TO BE DONE**
**ADEQUATE BORE-SITE STABILITY HAS NOT YET BEEN DEMONSTRATED**

## REBASELINE CONSIDERATIONS

**REBASELINE CONSIDERATIONS**
**(continued)**

**“****DYNAMIC SCHEDULING” IS THE ONLY WAY TO MAINTAIN MAXIMUM PACE TOWARDS LAUNCH**
**RUN-OUT SCHEDULE AFTER GLAS DELIVERY HAS BEEN OPTIMIZED**
**RECOVERED ~7 WEEKS**
**DELTA “18-MONTH” MAXIMUM DELAY CLAUSE EXPIRES 12**** ****/**** ****31**** ****/**** ****02**
**COMPENSATION FOR ADDITIONAL DELAYS MUST BE NEGOTIATED**

## PROPOSED REBASLINE

**PROPOSED REBASLINE**

**	****6**** ****/**** ****17**** ****/**** ****02****	****GLAS DELIVERY TO BALL***
**	****10**** ****/**** ****14**** ****/**** ****02****	****OBSERVATORY ARRIVAL AT VAFB****
**	****12**** ****/**** ****16**** ****/**** ****02****	****ICESat LAUNCH (NET)*****
**WEEKENDS (11 SUNDAYS) ONLY REMAINING RESERVE IN GLAS SCHEDULE; WORKING TO IDENTIFY OTHER OPPORTUNITIES**
****  2-WEEK RESERVE IN BALL SCHEDULE**
*****  NOMINAL DELTA FLOW BACKED BY RECENT BALL QUICKBIRD EXPERIENCE**

## RECOMMENDATION

**RECOMMENDATION**

**BASELINE THE PROPOSED SCHEDULE**
**WITH RECOGNITION OF ITS AGGRESSIVE NATURE**
**WITH ACCEPTANCE OF THE NECESSITY OF NEAR-TERM MILESTONE TO BEST MANAGE THE SITUATION**
**WITH EXPECTATION THAT IT BE RE-EVALUATED AT THE TIME OF INSTRUMENT DELIVERY**
**FISCAL IMPACTS (COMPARED TO NOVEMBER 2001 REPLAN)**
**ON-TIME DELIVERY RESULTS IN $0.8M INCREASE IN MISSION TOTAL COST**
**$3.5M REDUCTION IN FY 02**
**$4.3M INCREASE IN FY 03**
**FURTHER DELAY IN GLAS DELIVERY RESULTS IN ADDITIONAL INCREMENTAL INCREASE TO MISSION TOTAL COST**
**$3.3M**** ****/**** ****MONTH INCREASE IN FY 03**

## BACK UP

## SPACECRAFT FLIGHT HARDWARE STATUS

**SPACECRAFT FLIGHT HARDWARE STATUS**
**ICESat PROJECT                                                                                                                     STATUS AS OF:  1/31/02**

**ACS / ACTUATORS**

**MIC**

**EIC**

**ENV**

**RWA**

**TORQR  RODS**

**Legend:**

**C&DH**

**MIC**

**ENV**

**CTU**

**PEC**

**DBC**

**SCC**

**SEP**

**SSR**

**EIC**

**EPS**

**MIC**

**EIC**

**FUNCT**

**ENV**

**TEST**
**BATT**

**PCU**

**ARRAY PANELS**

**SADA **

**SADE**

**CTV**

**ETM**
**GPS**

**GLAS**
**SIM**

**EM**
**IST/LRS**

**GSE**

**ITOC**
**(GSFC)**

**HRNSS**

**OTHER**

**PAF**

**LRA**

**THRML**
**RAD**

**FLIGHT**
**BATT**

**FSW**

**FLT**
**PAF**

**PROP**
**MOD**

**FLT**
**SIRU**

**STRUCT**

**COMM**

**MIC**

**ENV**

**ZENITH**
**ANT**

**X-BAND**
**XPNDR**

**NADIR**
**ANT**

**RF  FILTER**

**FUNCT**

**ACS SENSORS**

**STAR TRKR**

**SUN SENSORS**

**SUN SENSORS**

**MAGNETOMETERS**

**MIC**

**EIC**

**FUNCT**

**EIC**

**FSWTB**

**FUNCT**

**ENV**

**Lost lock once during test  – thermal sensitivity under investigation**
**Possible VIA problem on PWBs - spare boards in analysis at GSFC**
**Adding ability to reset “stuck” DSU during planned thermal rework**
**Adding thermal control circuits for more stable GLAS interface**

**FUNCT**

**No Problems**
**Minor Problems**
**Major Problems**
**Complete/Delivered**
**Integration Complete**
**GLAS Mounting**

**PDA**

**SUN SENSORS**
**          ****(G)    (G)    (G)     (G)**

**GPS**

**S-BAND**
**XPNDR**

- 1

**(G)**

- 2

- 4

- 3

## INSTRUMENT STATUS

**OPTICS**

**RECEIVER SYSTEM**

**TELESCOPE**

** ****TRANSMITTER SYSTEM**

**FIBER OPTIC SYSTEM**

**LASER**
**(816nm)**
**OTS**

**LED**
**(532nm)**
**OTS**

**FIBER**
**OPTICS**

**GROUND**
**TEST**
**PICKOFF**
**ASSY**

**BENCH CHECKOUT EQUIPMENT**

**TARGETS -**
**MAIN/MINI/SRS**

**NTGSE**

**CONTROL-**
**LERS**

**WORK-**
**STATIONS**

**No Problems**

**Minor Problems**

**Major Problems**

**Legend:**

**ELECTRONICS**

**MAIN**
**ELECT**
**UNIT**

**HIGH**
**VOLTAGE**
**PWR SUPPLY**

**POWER**
**DISTRIB**
**UNIT**

**HARNESSING**

**LIDAR SYSTEM**

**ETALON**

**LBSM**

**BEAM-SPLITTER**
**ASSY**

**SPCMs**

**THERMAL CONTROL SYSTEM**

**CONSTANT**
**CONDUCT**
**HEAT PIPES**

**LOOP HEAT PIPES/**
**RADIATORS**

**BLANKETING**

**HEATERS/**
**INSTRUMENTATION**

**ALTIMETRY**
**TOWER**

**STELLAR REFERENCE SYSTEM**

**LASER**
**REF**
**TELESCOPE**

**ROSI**
**STAR**
**TRACKER**

**COLLIMATED**
**REF**
**SOURCE**

**LASER**
**REF**
**SENSOR**

**LASER**
**PROFILING**
**ARRAY**

**GYRO**

**HARNESSING**

**LATERAL**
**TRANSFER**
**RETROs**

**L**
**S**
**M**

**L**
**S**
**M**

**LASER**

**LASER**

**TEST SYSTEMS -**
**ALTIMETER/LIDAR/**
**GPS**

**INSTRUMENT STATUS**
**ICESat Project                                                                                                                                  Status as of 1/31/02****	****	****	****	****	****	**

**LASER**

## IT SECURITY

**	****Management****	****IT Security****	****Contingency****	****Agency****	****Number****	****Authorization**
_**Element**_**	**_**Plan**_**	**_**Plan**_** ****	**_**Plan**_**	**_**Check**_**	**_**People**_**	**_**To Proceed**_
**Ball / LASP****	****Complete****	****Complete****	****Complete****	****To Center ****	****22****	****Pending**
**	****	****	****	****Security**
**ISIPS / ISF****	****Final Pending****	****Final Pending****	****Final Pending****	****To be****	****18*****	****N**** ****/**** ****A**
**(GSFC Bldg 22)****	****	****	****	**** Re-assessed**
***Number increased significantly due to changes in IT security requirement to include data handling personnel.  Forms have been submitted and fingerprinting is in progress.**

**IT SECURITY**

**STATUS AS OF:   1/31/02**

## UNDER REVIEW

**ICESat MASTER SCHEDULE**** **

**99**

**00**

**01**

**02**

**C **

**Y**

**SPACECRAFT**

**PROJECT/ELEMENT**

**SCIENCE/ISIPS**
**GSFC CODE 900**

**ESDIS GROUND**
**SYSTEM + **
**OPERATIONS **

**Status As Of**

**1/31/02**

**1**

**2**

**BALL AEROSPACE**

**REVIEWS**

**GLAS INSTRUMENT**

**GSFC CODE 900**

**APPVL RESP**

**ACCOMP RESP**

**C. SCOLESE**

**J. DEZIO**

**GSFC**

**3**

**4**

**LAUNCH VEHICLE**
**DELTA 7320**

**CONTROL CENTER/FOT**
**BALL AEROSPACE**

**MOR**

**PER**

**LRD**

**Environmental Testing**

**Box, Pack, and Ship**

**Launch Operations**

**GLAS I+T**

**FOR**

**PSR**

**LRR**

**ACDS**
**+ Prop**

**S/As**

**Drill **

**Template**

**Final **

**ATBDs**

**Review ATBDs**

**Oral **

**Reviews**

**Report**

**MOWG 2 **

**NSIDC **

**CDR**

**#1**

**Flt Lasers 2 + 3**

**Beta**
**Version **

**Version #1**

**SCF Launch Ready**

**E-T-E**
**Test **

**EDOS **

**Vac**
**Test **

**CTV **

**Award**

**Award **

**Development**

**Procure.’s, Fab, Assy, + Test**

**ISF **

**AGS****NGS**

**GRD**
**ORR **

**30 Day**
**C/O **

**GLAS**
**C/O **

**FDS**
**PDR **

**Cmd/Tlm**
**  ****Test**

**Sim + Dress**
**Rehearsals **

**Fabrication**

**MRR**

**FRR**

**ORR **

**3**

**   ****Design/Development/Integrate/Test**

** ****Time Now**

**Avionics and Harness In-House**

**SIPS CDR**

**SIPS**
**Version #1**

**SIPS**
**H/W**

**SIPS**
**Version #2**

**Manufacturing , Assembly, and  Test**

**Ctrl Computers**

**Struct.**

**Final**
**MORD**

**Flt **

**Tele**

**   ****Design/Development/Integrate/Test**

**MOR**

**Start 2nd Stage **

**DPAF (C)          **

**CCAS**
**DMCO**

**LOX**
**Tanks (C) **

**LOX Tanks (S) **

**S/C Fit Check **

**DPAF Assy/Mfgr (S) **

**Complete 2nd Stage **

** ****Fuel Tanks (S) **

**Fuel **
**Tanks (C) **

**S/S Deliveries**

**PWR**

** ****C&DH + COM**

**Draft**
**IGS**
**Test**
**Plan **

**Original GLAS Delv.**

**Final IGS**
**Test Plan **

**LRD 10/31**

**Flt Laser **

**Delv **

**Bus Qual w/Instr Mass Model**
**and Elec I/F C/O w/Simulators**

**+2 Weeks Reserve**

**Subsystem I+T**

**PER 12/15**

**Assy + Test**

**Delivery and Launch Operations**

**SIPS**
**Version #3**

**FOT Training**

**Slip Delv to 4/30**

**(Proposed)**

**+1 week reserve**

**UNDER REVIEW**

## SCHEDULE SLACK OVERVIEW

- 		**CONTRACT/**	**                             ****	****	****DELIVERY****	****CURRENT****	****	**_**SOURCE**_**	****DATE****	**_**ESTIMATE**_**	**_**SLACK**_
**GLAS INSTRUMENT****	****CODE 500****	****	**** ****	**
**S/C BUS**** ****	****BALL****	****	**** ****	**
**	****	****	****	**
**OBSERVATORY I&T ****	****BALL ****	**** ****	**** ****	**
**AND LAUNCH**
**NOTES:**
**SCHEDULE UNDER REVIEW**

**SCHEDULE SLACK OVERVIEW**

**STATUS AS OF:   1/31/02**

##                    SCHEDULE SLACK HISTORY

**EVALUATED TURNING MIRROR SCRATCH**
**REPEATED WORKMANSHIP VIBRATION OF LSM-2**

**12**
** ****8**
** ****4**
** ****0**

**W**
**E**
**E**
**K**
**S**

**4/00              1/01                    1/02                   1/03**

**LRD CHANGE TO 12**** ****/**** ****15**** ****/**** ****01**

**4 WEEKS TO GLAS FOR I&T & COMPONENT PROBLEM RESOLUTION**

**11 WEEKS**
**TOTAL PROGRAM**

**                   ****SCHEDULE SLACK HISTORY**

**STATUS AS OF:   1/31/02**

**REWORK  OF HEAT PIPES, SPCMS, LASER ADJUSTMENT AND DC**** ****/**** ****DC CONVERTERS**

**ASSUMES GLAS DELIVERY DATE OF 12/1/01 AND 6/1/02 LRD**

**LATE SRS AND OTHER COMPONENT DELIVERIES TO I&T**

**FLIGHT E-BOX INDUCTOR REPAIR**

**OPTICAL STABILITY AND E-BOX REWORK**

**INSTALLATION OF INVAR COUNTER WEIGHTS ON LSM’S**

**-4 WEEKS SLACK**

**6/01 LRD**

**12/15/01 LRD**

**10/31/02 LRD PROPOSED**

**GLAS AETD SCHEDULE REBASELINE AND PROPOSED 10/31/02 LRD**

**SCHEDULE UNDER REVIEW**

## TREND ANALYSIS

**  **

**TREND ANALYSIS**

**STATUS AS OF:  1/31/02**

**SCHEDULE UNDER REVIEW**

## END OF MISSION PLAN DEVELOPMENT

**END OF MISSION PLAN DEVELOPMENT**
**COMPLETED**

_**Final Estimate**_**:  **
**	****Final Orbital Debris Generation report was approved by Headquarters on 4**** ****/**** ****9**** ****/**** ****01.  The total mission package included ICESat, CATSAT, DPAF, and launch vehicle.  Both ICESat and CATSAT meet the 8m****2**** guideline by significant margins.  ICESat is 3.9m****2**** and CATSAT 0.9m****2****.  ICESat will reenter in 15 years, which is well under the 25 year guideline.**
**	**
_**Disposal Option Assessment**_
**	**_**Controlled Reentry**_**:  Not practical -- +240kg additional fuel and 6 months delay**
**	**_**Safe Orbit**_**:  Not feasible -- same as re-entry**
**	**_**Shuttle Recovery**_**:  ICESat polar orbit not accessible to the shuttle; also spacecraft design not manned-flight rated**
**Expect no changes when CHIPSAT data becomes available**

**STATUS AS OF:   1/31/02**

## ACRONYMS

**ACRONYMS**

**AFT - (GLAS aft optics)**
**AGS - Alaska Ground Station**
**ANT - Antenna**
**ARO - After Receipt of Order**
**ATP - Authority to Proceed**
**CCAS – Cape Canaveral Air Station**
**CM – Center of Mass**
**CPT- Comprehensive Performance Test**
**CTU - Command and Telemetry Unit**
**DBC - Data Bus Coupler**
**DO – Delivery Order**
**DSU - Data Storage Unit**
**EAC – Estimate at Completion**
**E-BOX - Electronics Box (= MEU)**
**EDAC - Error Detection and Correction**
**EIC - Electrical Integration Complete**
**ENV - Environment or Environmental**
**EPS - Electrical Power Subsystem**
**FOR - Flight Operations Review**
**FOT - Flight Operations Team**

**FRR - Flight Readiness Review**
**FSW - Flight Software**
**FSWTB - Flight Software Test Bench**
**HRG - Hemispherical Resonating Gyro**
**HVPS – High Voltage Power Supply**
**IGS - ICESat Ground System**
**IIRR – Instrument Integration Readiness Review**
**IRU - Inertial Reference Units**
**ISF - Instrument Science Facility**
**I-SIPS - ICESat Science Investigator-Led Processing **
**IST - Instrument Star Tracker**
**ITOC - Instrument Test Operations Center**
**LASP - Laboratory for Atmospheric & Space Physics**
**LED – Light-Emitting Diode**
**LHP - Loop Heat Pipe **
**LPA – Laser Profiling Array**
**LRA - Laser Retro-Reflector Assembly**
**LRD - Launch Readiness Date**
**LRR - Launch Readiness Review**
**LRS - Laser Reference System**

**STATUS AS OF:   1/31/02**

## ACRONYMS

**ACRONYMS**

**LSM - Laser Steering Mechanism**
**MEU - Main Electronics Unit**
**MIC - Mechanical Integration Complete**
**MIWG - Mission Integration Working Group**
**MOC - Mission Operations Center**
**MOR - Mission Operations Review**
**MORD - Mission Operations Requirements Doc.**
**MOWG - Mission Operations Working Group**
**MPS - Multi-program Support**
**MRR - Mission Readiness Review**
**NADIR – Earth-facing side of spacecraft**
**NGS - Norway Ground Station**
**NISN - NASA Integrated Services Network**
**NSIDC - National Snow and Ice Data Center**
**NTGSE - (Windows) NT Ground Support Equip**
**ORR - Operational Readiness Review**
**OTS - Optical Test Source**
**PDA - Power Distribution Assembly**
**PDU – Power Distribution Unit**
**PEC - Precise External Clock**

**PRA – Probabilistic Risk Assessment**
**RWA – Reaction Wheel Assembly**
**S**** ****/**** ****A - Solar Array**
**SADA – Solar Array Drive Assembly**
**SADE – Solar Array Drive Electronics**
**SCC - Spacecraft Control Computer**
**SEP - Spacecraft Electronics Package**
**SIPS – Science Investigator-Led Processing System**
**SIRU - Space Inertial Reference Unit**
**SLTC – Space Lidar Technical Center**
**SM - Safe Mode**
**SORD - Systems Operations Requirements Document**
**SPCM - Single Photon Counting Module**
**SRS – Stellar Reference System**

**STATUS AS OF:   1/31/02**

## PROJECT OVERVIEW

**PROJECT OVERVIEW**

**ICESat**
_**SIGNIFICANT PROGRESS**_
**COMPLETED A SERIES OF GLAS FUNCTIONAL TESTS WHICH WILL**** ****PROVIDE A BASIS FOR THE COMPREHENSIVE PERFORMANCE TEST**
**COMPLETED A SERIES OF GLAS FUNCTIONAL TESTS WHICH WILL PROVIDE A BASIS FOR THE COMPREHENSIVE PERFORMANCE TEST**
**GLAS EMI TESTING BEGAN ON 2**** ****/**** ****1**** ****/**** ****02**
**LASER (SN 001) OPTICAL REWORK COMPLETED.  CURRENTLY BEING CHARACTERIZED IN THERMAL VACUUM.  RESULTS TO DATE ARE NOMINAL.**
**MISSION OPERATIONS WORKING GROUP MEETING HELD ON 1**** ****/**** ****30**** ****/**** ****02.  NO MAJOR ISSUES SURFACED.  TESTING PROCEEDING AS PLANNED.**
_**ISSUES**__** **__**/**__** **__**CONCERNS**_
**GLAS HARDWARE FAILURES AND ANOMALIES HAVE IMPACTED SCHEDULE AND REPRESENT SIGNIFICANT LIENS ON THE FLIGHT SYSTEM; HOWEVER, TEAM IS WORKING HARD TO PRESERVE OCTOBER-DECEMBER 2002 LRD.**

**R**

**STATUS AS OF:   1/31/02**