# Presentation: 741828

## 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**
**	****   ****DPM**** ****/**** ****Resources:                          Linda Greenslade**** ****/**** ****425**
**	****   ****Instrument Development:            Ron Follas**** ****/**** ****556**
**	****   ****Instrument Scientist:****	****	****       Dr. J. Abshire**** ****/**** ****924**
**	****   ****Ground System Development:    ESDIS**** ****/**** ****423**
**	****   ****Spacecraft Contractor:                 Ball**

**AUGUST 13, 2002**

## ICESat PROJECT SUMMARY

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

**G**

**R**

**Y**

**G**

**Y**

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

**ICESat PROJECT SUMMARY**
**STATUS AS OF: 7/31/02**

_**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     Management        Overall**

** ****MAY   JUN    JUL **

**Spacecraft Bus:**

**Prime**

**Major Interfaces**

**Resources**

**Instruments**

**Business**

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

**Summary Assessment**

**JPL GPS Receivers**

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

**GLAS**

**   ****MAY  JUN   JUL**

**   ****MAY  JUN   JUL**

**MAY   JUN     JUL**

**  ****MAY    JUN   JUL**

**  ****MAY  JUN    JUL**

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

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

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

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

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

**G**
**G**
**G**
**Y**

**G**

**G**

**G**

**G**

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

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

**G**

**G**

**G**

**G**

**G**

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

**Y**

**Y**

## GLAS I&T PROBLEMS IN WORK

**G**

**GLAS boresight stability does not meet mission performance requirements**** **

**CURRENT STATUS**
**Additional analysis initiated on the telescope assembly.**
**Peer Review held. Retest conducted; preliminary results look favorable with major errors traceable to set-up issues.  Detailed data analysis results look promising.**
**Test plan defined.**
**Plan in place to validate; requires completion of environmental test program.**
**Boresight found to meet requirements. Additional analysis in work.  Deadline to complete is Observatory PER.**
_**AETD Peer reviews validated approach.**_
_**CLOSED**_

**GLAS I&T PROBLEMS IN WORK**
**OPTICAL PATH**
**ICESat Project****	****STATUS AS OF: 7/31/02**

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

**          ****DATE**
**   ****ESTAB  COMPL**
**    ****11/30   7/15**
**      **

**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.**
**Software fix to be validated in T/V testing.**
**Open loop control successfully demonstrated in T/V. **
_**Software patches installed.      **_
_**CLOSED**_

**GLAS I&T PROBLEMS IN WORK**
**LIDAR OPERATION**
**ICESat Project****	****STATUS AS OF: 7/31/02**

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

**          ****DATE**
**   ****ESTAB  COMPL**
**   ****12/17    6/15**
**     **

**G**

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

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

## GLAS I&T PROBLEMS IN WORK

**  ****Prepare briefing for Code Y on mission impacts and risk and impact of pursuing repair.**

**G                                                 **

**CURRENT STATUS**
**Some spare units being prepared for parallel testing.**
**Science Team assessing impact to the mission if failed units are not replaced.**
**Code Y meeting scheduled for May 17.**
**Code Y decision to fly “as-is”.**
**Spares in testing. Failure investigation on old units in work.**
_**Plans for on-orbit operation being developed.**_
_**CLOSED**_
** **

**GLAS I&T PROBLEMS IN WORK**
**SPCMS                **
**	**

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

**          ****DATE**
**   ****ESTAB  COMPL**
**  ****4/26      7/15**

**  ****Cannot fully meet secondary science objectives.**

**   ****Failure of four SPCMs in GLAS thermal vacuum testing.**

**STATUS AS OF 7/31/02**

** ****ICESat Project**

## GLAS TRAVEL

**GSFC to find funding.**

**G**

**CURRENT STATUS**
**Preliminary shortfall of approximately $90K identified.**
**Code 920 attempting to determine if any relief is possible from Code 900.  In the interim, **
**     ****Code 425 paying for GLAS travel out of mission budget.**
_**Supplementary funding identified.**_
_**CLOSED**__** **_

**GLAS TRAVEL**
**ICESat Project****	****STATUS AS OF: 7/31/02**

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

**          ****DATE**
**   ****ESTAB  COMPL**
**   ****7/8        7/15**

**  ****Unable to support ICESat I&T**

**   ****Code 920 did not budget adequate travel dollars for GLAS/ Codes 900 and 500 field operations.**

## SCIENCE PERFORMANCE ASSESSMENT

**Y**

_**Altimetry error **_
_**estimates exceed**_
_**mission objectives**_
_**in some operational**_
_**circumstances**_**.**

**CURRENT STATUS**
_**Code Y briefed on  Aug 6. Decision to proceed as-is and revisit after Observatory T/V.**_
_**Observatory**__** **__**T/V tests identified to validate restricted temperature operations for GLAS.**_

**SCIENCE PERFORMANCE ASSESSMENT**
**ICESat Project****	****STATUS AS OF: 7/31/02**

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

**          ****DATE**
**   ****ESTAB  COMPL**
**   **_**7/22**_**      **_**9/5**_
**      **

_**Degraded science**_
_**products**_

_**Brief Code Y on impacts to mission**_
_**Optimize GLAS performance on- orbit**_
_**Complete BAM development and qualification**_

## LAUNCH VEHICLE SCHEDULE

**Y**

_**Secondary payload**_
_**(CHIPSAT) working a**_
_**very tight schedule to**_
_**make Boeing/DELTA **_
_**deliverables**_**.**

**CURRENT STATUS**
_**NASA management briefed on potential issues.**_

**LAUNCH VEHICLE SCHEDULE**
**ICESat Project****	****STATUS AS OF: 7/31/02**

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

**          ****DATE**
**   ****ESTAB  COMPL**
**   **_**8/7**_**        **_**8/21**_

_**Launch delay**_

_**Establish milestones**_
_**for decisions to slip**_
_**launch or de-manifest**_
_**secondary payload.**_
_**Verified coupled **_
_**loads(VCL) model due 9/2.**_

## PMC ACTION STATUS

**PMC ACTION STATUS**

_**Data**__** **__**/**__** **__**Source**_
**     ****NONE**

_**Status**_

**ICESat Project****	****STATUS AS OF: 7/31/02**

## IT SECURITY: NAC STATUS					STATUS AS OF: 7/31/02

## ICESat SIGNIFICANT PROGRESS

**ICESat SIGNIFICANT PROGRESS**

**ICESat Project****	****STATUS AS OF: 7/31/02**

** **

**GLAS performing well in spacecraft environment.**
**Observatory comprehensive electrical performance test (CEPT) successfully completed.**
**PER held on 7-29-02.**
**Observatory T/V underway.**
**BAM qualification testing completed.**

## PROJECT RESERVES

**PROJECT RESERVES**

**ICESat Project****	****STATUS AS OF: 7/31/02**

**Cost:           ****	****Unliened**** ****/**** ****unencumbered reserves****	****=****	****17. 1%**
**                     ****in Cost-to-Complete****	****	****	****	**
**	****	****	****	****	**
**Schedule:****	**_**(Unscheduled Months)**_**	****=****	****1. 19%**
**	**** ****Year until Launch ****	**
**	****	****	**
**Mass:****	**_**(Allocated-Estimated)%**_**	****=****	**_**1050 – 981**_**	****=****	****6.6%**
**	****Allowed****	****	****1050**
**Power:****	**_**(Allocated-Estimated)%**_**	****=****	**_**792 – 668**_**	****=****	**** 15.7%**
**	****Allocated****	****	****792**

## Slide 13

## ICESat SCHEDULE SLACK

**84**
** ****56**
** ****28**
** ****0**

**D**
**A**
**Y**
**S**

**ICESat SCHEDULE SLACK**

**ICESat Project****	****STATUS AS OF: 7/31/02**

**Mar       Apr      May      Jun      Jul      Aug      Sept      Oct      Nov      Dec 02**
**	****	****	****	****	****	****	****          ****LRD**

**Replan to 12/02 LRD**

**ACCEPTED CODE M**
**REQUEST TO ADVANCE**
**LAUNCH TIL 12/15/02**

## BACKUP

**ICESat**

## ICE, CLOUD, AND LAND ELEVATION SATELLITE

**ICE, CLOUD, AND LAND ELEVATION SATELLITE**
**(ICESat)**

_**Project Management**_**:****	****	****GSFC/Code 425**
_**Spacecraft**_**:****	****	****Ball Aerospace**
_**GLAS Instrument**_**:****	****	****In-House GSFC**
_**Ground System**_**:****	****	**
**        ****Control Center:****	****	****University of Colorado/LASP**
**        ****Ground Data Handling:****	****                   EOSDIS**
**        ****Science Data Processing: ****	****                   GSFC/Science Computing Facility**
**        ****Data Repository:****	****	****NSIDC**
_**Science Team**_**:****	****	****GSFC, UTX/Austin, UCA/San Diego, UWI/Madison, MIT, and ****	****	****EG&G                        **
_**Development Period**_**:****	****	****2/98 – 12/02**
_**Launch Readiness Date**_**:****	****                   12/19/02**
_**Launch Vehicle**_**: ****	****	****Boeing/Delta 7320, with DPAF**
_**Launch Site**_**:****	****	****Vandenburg AFB, CA**
_**Co-Manifest Partner**_**:****	****	****Cosmic Hot Interstellar Plasma Spectrometer (CHIPSat)**
_**Mission Objectives**_**:****	**
**        ****1.  Produce high accuracy and calibrated profiles of ice-sheet surface elevations over Greenland**
**             ****and Antarctica.**
**        ****2.  Produce calibrated profiles of global land and ocean surface elevations.**
**        ****3.  Produce calibrated vertical profiles of global cloud heights and vertical distributions of cloud **
**             ****and aerosol properties for the first time.**
**        ****4.  Map high accuracy ice-surface elevation changes over Greenland and Antarctica for the first **
**             ****time.**
**        ****5.  Characterize the seasonal variability of ice-sheet surface elevations over the mission lifetime.**
_**Website**_**:   http://icesat.gsfc.nasa.gov/**

**	****STATUS AS OF:7/31/02**

## 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**

**ICESat Project****	****STATUS AS OF: 7/31/02**

## UNDEFINITIZED CONTRACT ACTIONS

**ICESat ****Project                                                                        ****STATUS AS OF:   07/31/02**

**	****	****	****	****TARGET**
**	****	****	****  ****DATE****	****DEFINITIZATION**
**	****CONTRACT****	****   VALUE****	****  ISSUED****	****DATE****	****STATUS**

**Launch Delay -**
**ICESat**

**GLAS**
**NAS5-99003**
**EG & G**

** ****$475K**

**5/17/02**

**8/30/02**

**Tech eval received on 7/19/02.**

**Launch Delay-**
**ICESat**

**$98K**

**5/17/02**

**8/30/02**

**GLAS**
**NAS5-99004**
**UNIV. WI**

**$2,028K**

**5/17/02**

**8/30/02**

**GLAS**
**NAS5-99005**
**UNIV. TEXAS**

**Tech eval received on 7/18/02.**

** ****Tech eval received on 7/18/02.**

**Launch Delay -   ICESat**

**GLAS**
**NAS5-99006**
**UNIV.CA - SD**

** ****Tech eval received  on 6/12/02.**

**Launch Delay - ICESat **

**GLAS**
**NAS5-99007**
**MIT**

**$389K**

**5/17/02**

**8/30/02**

**$392K**

**5/17/02**

**8/30/02**

**Launch Delay –**
**ICESat**

**Tech eval received on**
** ****5/29/02.**

## 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**
**CEPT - Comprehensive Electrical Performance Test**
**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**

**ICESat Project****	****STATUS AS OF: 7/31/02**

## ACRONYMS

**ACRONYMS**
**(CON’T)**

**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**
**NAC- National Agency Check**
**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**
**TV - Thermal Vaccum**
**VCL- Verified Coupled Loads**

**ICESat Project****	****STATUS AS OF: 7/31/02**

## PROJECT OVERVIEW

_**SIGNIFICANT PROGRESS**_
**GLAS performing well in spacecraft environment.**
**Observatory comprehensive electrical performance test (CEPT) successfully completed.**
**PER held on 7-29-02.**
**Observatory T/V underway.**
**BAM qualification testing completed.**
_**ISSUES / CONCERNS**_
**Science team concerns re: anticipated accuracy of altimetry measurements places potential lien on flight of the mission.**
**Careful attention must be placed on CHIPSAT schedule performance to assure  launch is not delayed.**

**G**

**PROJECT OVERVIEW**

**ICESat Project****	****STATUS AS OF:7/31/02**