Southwest Research Institute November 8, 2006

1
Southwest Research InstituteNovember 8, 2006
IBEX Team Meeting
IBEX Science Operations Center (ISOC) Chelle Reno
2
Outline

• Top-Level ISOC Requirement
• Overview
• Payload Operations
• Database and Web Interface
• Data Processing
• Data Analysis Modules
• Changes Since IGPP 06
• Problems Solved Since IGPP 06
• Conclusions

3
Review Top-Level ISOC Requirement

• To receive S/C data from the MOC and perform the
  following tasks
• Sequence data
• Identify data gaps and remove redundant data
• Process to higher level data products
• Archive and make data products available to the
  IBEX Science Team and the greater scientific
  community
• Also responsible for IBEX payload commanding,
  performance trending and parameter modifications
  over the course of the IBEX mission

4
Review IBEX Data Flow
5
Review Orbit in the Life of the ISOC

• Provide orbit-specific payload command list to
  Orbital MOC
• Receive raw SSR and near-real time SOH from the
  Orbital MOC ingest into ISOC database
• Remove CCSDS headers (Level 0)
• Sequence data, identify data gaps remove
  redundant data using MAESTRO (Level 0.5)
• Generate Level 1 data ingest into ISOC database
• Includes derived fields such as spin phase, look
  direction, background as a function of look
  direction
• Accumulate Level 1 data into Level 2 maps
• perform magnetospheric/heliospheric segregation,
  separate species, find velocity direction,
  identify and cull any backgrounds
• ISOC remotely views real-time SOH during perigee
  pass

6
Review ISOC Organization
ISOC Lead Chelle Reno SwRI (FTE)
Mission Ops Manager Bill Tittley (Orbital)
Science Analysis Modules Nathan Schwadron Boston
Univ. (.25 FTE)
Payload Operations Mark Tapley SwRI (.2 FTE)
Data Processing Software Jillian Redfern SwRI (.5
FTE)
Database Web Interface Software Ratna Sardar
SwRI (.5 FTE)
PLFW John Hanley Greg Dunn Brad Trantham SwRI
(.06 FTE)
Brent Randol Brian Stuart Jameson Passuite Boston
Univ. (.33 FTE)
Christina Prested Cara Battersby Boston Univ. (.5
FTE)
FTE Yearly Average
7
Payload OperationsCommand Load Generation

• 2 - 8 P/L commands per orbit
• P/L commanding is macro driven
• Variable parameters are set in Look Up Tables and
  called by macros
• Simplifies command load generation and validation
• Most orbits will only have 2 P/L commands

8
Payload Operations Payload Command Load Template
Used Every Orbit
9
Nominal Operations Timeline
10
Nomenclature - Science

• Energy Step one ESA setting
• 2 spins (ESA step every 30 seconds _at_ 4rpm)
• Energy Sweep 6 (8) E steps for Hi (Lo)
• Hi 12 spins 6 min.
• Lo 16 spins 8 min.
• Energy Frame 4 E sweeps
• Hi 720 spins 12 min.
• Lo 960 spins 16 min.
• Syncing of Energy Frames every 48 min.

11
Science AcquisitionHigh-Level Timeline
12
ISOC Database Web InterfaceDatabase

• MySQL Database
• Each APID has its own database table
• Raw Level 1 data inserted into database
• IBEX Database Backups
• 2 Linux Boxes in ISOC
• Backed up daily
• Transcribed to tape and stored
• Backup database at Boston University

13
ISOC Database Web InterfaceWeb Interface

• Query database using user defined filters
• Filter by sensor, energy, look direction,
  background, etc.
• Displays plot Download plot filtered data set
• Team page password protected
• Varying levels of data access
• Comply with ITAR restrictions
• Ensure data validity
• Can submit request for additional data
• Forum for discussion of results
• Instrument effects, anomaly reports

14
IBEX Data Processing Overview
Sequence Data
MOC to ISOC
Level 0.5 Data
Attach header information
Raw Data (CCSDS)
Level 1 Data
Level 0 Data
Identify Data Gaps
decommute
Create Derived Fields
Remove Redundant Data
Cull Magnetospheric Data
Remove Backgrounds
Global ENA Maps Filter by Sensor, Energy, Look
Direction, Background Level Overlay Moon,
Planets, UV Stars
Level 2 Data
Data processing
Data Products

• Faux data streams used to generate test data
  processing software

15
IBEX Data Processing Overview
Sequence Data
MOC to ISOC
Level 0.5 Data
Attach header information
Raw Data (CCSDS)
Level 1 Data
Level 0 Data
Identify Data Gaps
decommute
Create Derived Fields
Remove Redundant Data
Cull Magnetospheric Data
Remove Backgrounds
Global ENA Maps Filter by Sensor, Energy, Look
Direction, Background Level Overlay Moon,
Planets, UV Stars
Level 2 Data
Data processing
Data Products

• Faux data streams used to generate test data
  processing software

16
Raw to Level 0.5 Data
17
Level 0.5 to Level 1 Data
18
Data Analysis Modules

• Pixel Viewing algorithm
• Sky coverage analysis
• ENA event generation of faux data streams
• Data processing software testing
• Database insertion software generation testing
• Web interface software generation testing
• PLFW DE prioritization testing
• Expected sources documentation
• ENA forward model
• Use data analysis and existing models to predict
  what IBEX will see
• Community modeling interface documentation

Completed
In progress
19
Changes Since IGPP 06

• ISOC database changed from Flat Files to MySQL
• ISOC database changed to Linux platform
• MOC-ISOC Interface Changed
• Near real-time Remote display of Analyst MAESTRO
  server using VNC during passes
• Post pass SOH and SSR data Secure ftp transfer
  from MOC server

20
Problems Solved Since IGPP 06Direct Event
Prioritization Scheme

• PLFW team working with ISOC and Boston University
  (BU) team to assess DE culling schemes
• BU provides absolute time-tagged and raw direct
  event information based on heliospheric models
• Heliospheric only data
• Heliospheric magnetospheric data
• PLFW team runs the combined data file through
  high-level language (Python) program to try
  different algorithms quickly and generate
  filtered output
• Compare filtered data files with heliospheric
  only data files

• Similar simulation path can be used to check ISOC
  Data Path

21
Problems Solved Since IGPP 06Star Tracker
Outage Analysis

• Simulated pixel viewing time for 10 degree
  keepout angle
• Assumed all data lost during star tracker outages
• Even if all data is lost we get acceptable
  statistics
• In reality we will be able to recover the data
• Lo star sensor data can be used for look
  direction
• Star tracker continues to generate spin pulse

22
Conclusions

• IBEX Operationally Simple
• Open data policy
• Small data volume
• Data made available to team quickly
• Ahead of curve software design
• ISOC software available to public

23
Stay Tuned

• Feedback wanted on IBEX Data Site
• Testing of prototype IBEX data site
• Post faux data to play with
• Improvements additions

24
Backup Charts
IBEX Science Operations Center (ISOC) Backup
Charts
25
ISOC Lab Space

• Computers with monitors keyboards
• MAESTRO workstation
• GSEOS Laptop - 2
• Data Processing Computer - 2
• Computers for other uses - 3
• STK license

• Additional Office equipment
• Conference Table to seat at least 8
• Desks/chairs for computers
• Filing Cabinets - 3
• Bookshelf Cabinet - 4
• Phone
• Conference Phone
• Projection Screen
• Projector
• Routers

• CPU only
• Primary Archive computer
• Secondary Archive computer

• Other
• Outlets on 3 walls
• Outlets under conference table
• Ethernet jacks on at least 2 walls
• One must be outside firewall

• Hardware
• Spacecraft Bus Sim (3'x2'x4')
• CEU Sim

26
Detailed Document Status
27
Nomenclature
ACRONYMS

• Flight Software (FSW) SCB Software
• Payload Firmware (PLFW) CEU Software
• High Altitude Science Ops (HASO) (gt 10 Re)
• Low Altitude Housekeeping Ops (LAHO) (lt10 Re)
• State of Health (SOH) (SCB P/L) SOH
• Channel D IBEX-Hi background monitor
• Star Tracker SCB Star Tracker
• Star Sensor IBEX-Lo star sensor

SUBSYSTEMS
28
Payload OperationsCommand Load Validation

• Software constraint checks for
• Potentially hazardous commands
• HV turn-on
• Large commanded voltage jumps
• Operational constraints
• Sensors in standby below 10 RE
• Sensors off during HPS maneuvers
• Order of operations
• Garbled commands
• Human checks
• In addition to software checks, MOC and ISOC
  personnel will manually check command loads
  before uplink

29
ISOC Verification Matrix

• Command Load Generation Test
• Data Processing Software Test
• Database Web Interface Software Test
• ISOC-MOC Interface Test
• Mission Simulation
• In Thermal Vacuum Testing
• An Orbit in the Life
• Mission Rehearsal
• Remote participation from ISOC
• P/L Initialization and Checkout
• Entrance to Nominal Operations

30
EPR Action Items

• update provided at CDR

31
Document Status Summary

• Plans
• Number planned 2
• Percent complete 50
• Test Procedures
• Number planned 6
• Percent complete 0
• Engineering Memos/Analyses
• Number planned 3
• Percent complete 67

32
Science Operations Staffing

• ISOC Staffing
• Mission Design - Planners
• ISOC Lead, ISOC Lead (Chelle Reno)
• Payload Operations Lead (Mark Tapley)
• Science Mission Planner - P/L command load
  generation and verification
• Software - Executers
• Database Data Processing Software (Jillian
  Redfern, Ratna Sardar)
• Database insertion software
• Level 0, 1, 2 processing software
• P/L trending software
• Toolkit Software
• Data Analysis Modules (Nathan Schwadron, Brian
  Stuart, Brent Randol, Jamison Passuite, Cara
  Battersby)
• Simple Physics-based inversions for Termination
  Shock Strength, Structure
• More detailed modeling for energetic particle
  energy spectra and energy partitions
• Analysis modules for understanding interstellar O
  flow speed, direction, temperature, and the
  secondary population
• Payload Flight Software (John Hanley, Greg Dunn)
• Flight Software Changes
• LUT Changes

33
EGSE

• MAESTRO work station
• Command load generation and test
• Real-time housekeeping
• GSEOS PC
• Real-time science data

34
IBEX Data Products

• Raw Data
• Stored at VCDU level in ISOC database
• Level 0 Data
• Identify missing redundant packets in MAESTRO
  workstation
• Level 0.5 Data -
• MAESTRO output delimited text file
• SSR Fields Only

35
IBEX Data Products

• Level 1 Data - Contains Derived Fields
• Ingested into ISOC database

36
MPS Command Load Data Flow
37
Star Tracker Outage Analysis

• Star Tracker FOV 23º half angle
• Cant star tracker 13º off -Z axis
• Keepout angle
• 23º - cant angle

38
Simulated Data - w/ Magnetosphere
39
Simulated Data - No Magnetosphere

• Comparing data files with and without will allow
  testing of the PLFW DE prioritization software

• is this the right direction, chelle?

40
Simulated Data - Level 0.5 Output
000000000 0 101101 5 0
4 000000006 0 101101 5
0 4 000000013 0 111011 5
0 4 000000020 0 100011
0 0 4 000000026 0
100011 0 0 4 000000033 0
011101 0 0 4 000000041
0 010011 1 0
4 000000047 0 101011 1 0
4 000000054 0 010101 1
0 4 000000068 0 110011
2 0 4 000000075 0 001011
2 0 4 000000083 0
100000 4 0 4 000000089 0
000011 4 0 4 000000096
0 010010 4 0 4
41
Future Work

• ISOC laboratory
• Detailed planning and equipment procurement
• ISOC IT network and infrastructure procurement
  setup
• Develop IT security approach
• P/L Initialization Checkout
• Detailed planning of P/L IOC which includes the
  approach to transmitter thermal constraints
• Community science models into ISOC
• Create interface document to easily incorporate
  various models into the ISOC

42
Action Item Detail

• update with link

43
Specifications

• update with link

44
ISOC Schedule
2007
2008
2006
CY2005
N
O
A
S
J
J
M
A
M
F
J
D
N
O
A
S
J
J
M
A
D
Activities
D
N
O
A
S
J
J
M
A
M
F
J
J
J
M
A
M
F
J
P/L Delivery to S/C
Start P/L IT
IBEX Launch 6-15-2008
MCDR
Program Milestones
CR
PPDR
SRR
MOR
MPDR
IT and Mission Rehearsals
Hi Lo Cal
P/L Delivery
Payload (ISOC)
LabDevelopment
P/L IT