REVIEW OF POLAR GS & OPS

• Primary Audience : POLAR Project Scientist and Deputy Project Scientist

• Objective : Review the design and Operations of the POLAR Ground System and provide recommendations to relating to possible re-engineering potential of POLAR Ground System.

•Primary Author: Richard Burley – IMAGE GSM–rburley@pop600.gsfc.nasa.gov

CSOC Cost Disclaimer

• Costs in this presentation are ‘Direct’ costs.– Staff & Immediate Mgmt, Materials, Other Direct costs such as

Travel, Training etc.

– ‘Sustaining Engineering’ costs being changed from ‘Direct to Indirect’ costs, but has been highlighted where it is significant.

• ‘Indirect’ costs being moved to a multi-mission Code-S UPN.

• CSOC Cost Estimates and funding approach are changing on a daily basis, and separating specific costs out of ‘rollups’ is not always accurate.

ISTP Data Flow Overview

FDF

JPL MOC CDHF

RLZP

ScienceTeams

NSSDC

TRK_2-15A

IIRV

cmds

R/T tlm

NR

T data for A

ttitude

Pred

icts

Raw Data Files

AM

Fs for Trending

NRT tlm

Orbit/Attitude

Geo

tail

Eph

em

TT

CD

File

s

Level-0 (QL+Day)

NRT tlm

All Products

ISASG

eota

il T

TC

Ds

Cmd ReportsOps Schedules

Cal_tables

Ext Products

Cap

ture

d IR

TS

data

LZP Context Diagram

JPLCDR

OracleDB

RLZP

RawDataArchive(3.5Tb)

AMF Files

Raw Data Files via FTP

FDF

MOC AMF Files for Trend Generation

Geotail Ephems for s/c Time EstimationAs backup to ISAS TTCD files.

CDHF

Instrument-Specific Level0 FilesBoth Quicklook and Daily + SFDUs

Plus transfer lists

TimeTag Correlation Data Files

‘Packets’

Capture/Rename[c]

Software Sync[c]

MajorFrameAssembly (labview)

MajorFrameDecom (labview)

DataProcessingSystem [c]

Captured IRTS files (contingency)

ISASTapes/CDs of Rawdata (contingency)

LZP Processing Costs

• ISTP LZP processing was reengineered in ’97, requiring approximately 9 FTE’s.

• Reengineering reduced Operations Staff from 13 to 2.25.

• Processing and Products are very Mission and Instrument specific and include numerous ‘artifacts’.

• Further Reengineering unlikely to save more than it costs.

• No mission-specific breakdown of cost available.

0

10

20

30

40

50

60

70

80

90

K$/Fy

Polar

Wind

Geotail

LZP Staff Utilization

• Data Analysis: reviewing run logs for correctness and completeness and delivery.

• Troubleshooting: diagnosis and recovery from h/w & s/w problems, data gaps, network problems.

• Maintenance: System Administration, Oracle DB maintenance.

0

5

10

15

20

25

30

35

%FTE

Data Analysis

Reporting

Processing

Troubleshoot

Maintenance

RLZP Recommendations

• TBD

FDF Context Diagram

JPLFDFTRK-2-15a Tracking Data

RLZP

MOC

NRT H/K data

Geotail Ephems for s/c Time EstimationAs backup to ISAS TTCD files.

CDHF MSASS[Matlab]

GMAN[Matlab]

GTDS[F]

Tlm Capture[F]

IIRV Pointing Data

2-year Orbit Predicts

Orbit Events Predicts

Sensor & Aspect Angle Predicts

Maneuver Plans & Timelines

ACQSCAN

Monthly Orbit Solution & 70-day predict

Weekly DSP Attitude & 70-day predict

POLAR FDF Costs

• This chart is TBD until I get some real numbers from Tim.

0

10

20

30

40

50

60

K$/year

Orbit Products

AttitudeProducts

Maneuver Support

Sustaining

WIND FDF Costs

• Orbit Support:– Trajectory Maintenance.

– Trajectory Design & Contingency Analysis

– Maneuver Planning.

• Sustaining Engineering being moved to multi-mission Code-S UPN.

0

10

20

30

40

50

60

70

K$/Fy

Orbit Products

Orbit Support

AttitudeProducts

Sustaining

FDF Orbit Products

• Monthly Definitive Orbit (+/- 10Km (3-sigma)) at 1 minute resolution in FDF-Ephemeris Format, used internally in FDF for validation of 70-day predicts.

• Predicted 70-day Orbit (+/- 100Km (3-sigma)) at 1 minute resolution in FDF-Ephemeris Format, provided monthly to CDHF.

• Monthly Orbital Events File, includes eclipse times, apogee/perigee times, ascending/descending node times, sent to MOC.

• Quarterly Orbital Events File includes access times to all DSN stations, and eclipse times, put on server for MOC and Science Planners.

• Monthly IIRVs to JPL for DSN antennae pointing.

• LongTerm Predict (2 years) to DSN for mission planning.

FDF Attitude Products

• Weekly Definitive Attitude (single-point solution+/- .2 degrees) in POLAR AHF, generated from r/t data from MOC. Used internally for generation of weekly DSP definitive AHF and Sensor Predicts.

• Weekly Definitive DSP Attitude (single-point solution +/- .2 degrees) POLAR AHF, generated from r/t data from MOC, sent to CDHF.

• 70-day Predicted Attitude (+/- 1 deg) at daily resolution in POLAR AHF, provided weekly. Includes gravity-gradient, magnetic-dipole, solar-radiation pressure models & planned maneuvers. Sent to CDHF.

• Monthly Horizon Sensor Predicts (+/- .2 deg) at 5 minute resolution to MOC via flat ascii file.

• Monthly Sun Sensor Predicts (+/- .2 deg) at 5 minute resolution to MOC via flat ascii file.

• Monthly Antennae Aspect Predicts (+/- .2 deg) at 5 minute resolution to MOC via flat ascii file.

FDF Maneuver Support

• Maneuver Planning, Execution, and Analysis.

– March 2002 - maneuver South Ecliptic Pole

– September 2002 - maneuver to Negative Orbit Normal

– March 2003 - maneuver to Positive Orbit Normal

– October 2003 - maneuver to North Ecliptic Normal

• Sensor Calibration is no longer required, but biases are trended.

• Pointing Trim Maneuvers will be required after 10/2003 due to gravity gradient effect predicted to about .1 degree RA per day, in order to avoid sun angle (thermal) constraints.

FDF Recommendations

• TBD

MOC Context Diagram

MOC

RLZP

JPL

R/T H/K Telemetry + Monitor Blocks

CDHF

TPOCC

Ops Schedules

Commands

IRTS Telemetry

Voice-Com

NRT Telemetry

Sensor Predicts & Orbit Event Reports

Maneuver Timelines

FDF

AMF Files for Trend Generation

Command History Reports

IRTS

IRTS Captured Files (contingency)

MOC Recommendations

• TBD

CDHF Context Diagram

CDHF

All LZs, CDFs, Command Histories

RLZP

Geotail TTCDs

QL & Day LZ files (31) + SFDUs

Edited & Decom’d NRT streams

Orbit Products

Attitude Products

RDAFs

Geotail TTCDs via email

NSSDC

FDF

ISAS

MOC NRT Data Stream

Command Histories & Ops schedule

RALCluster data products

GroundScienceGround-Based Science Data Products

All LZs & CDFs

KP’s & Hi-Res Products

Calibration Tables

# POLAR products = 53 #WIND products = 32 #Geotail products = 35 #Other products TBD.

CDHF Costs

• Freeze KPGS at current release, and no system enhancements or upgrades.

• Ops support from 24x7 to 8x5.

• NRT streams not checked pre-pass.

• Data Online for 30 days.

• No dedicated PAC. Will do best effort.

• No reprocessing of KPGS.0

500

1000

1500

2000

2500

3000

3500

FY01 FY02

Fee

ODC

Materials

Staff

CDHF Recommendations

• TBD

BACKUP SLIDES

Maneuver Overview

• Update GMAN input files with current and long term Ephem’s, attitude, body-rates, tank temperatures and pressures.

• Determine when beta angle reaches 90 and 93 degrees using long term Ephem, and orbit normal at 3 months from 90 degree beta angle.

• Plan 2 separate maneuver segments, each of which requires duel-station contact allowing for changing antennae aspect angle and eclipses, and which also increase perigee height, and allow for other pulsed maneuver constraints.

• Prepare backup plans in the event of postponement.

• QA the plans and prepare timeline, review results with FDF & FOT.