1. ASPOC Presentation for the CAA Operations Review-1 Klaus Torkar and Harald Jeszenszky
IWF/OAW Graz
ESTEC, May 2006

2. Contents of Presentation
Introduction
Management Structure
Action Items of the Implementation Review
Overview of the ASPOC Data Products
Software Development
Data Delivery Schedule
Status of the Data Products Provision
Products Delivered
Documentation
Summary

3. Management
All tasks carried out at a single institution: Space Research Institute Austrian Academy of Sciences Schmiedlstrasse Graz, Austria
Persons involved:
Name
Main Function
Klaus Torkar
Project lead, coordination, documentation
Harald Jeszenszky
Software development, testing, data production, documentation
Gunter Laky
System management
Manfred Stachel
Data production support

4. Action Items from Implementation Review
none

5. total current (constant)
Data Products - 1
IONC: Ion beam current with 0.5 s time resolution
IONS: Ion current snapshot, s time resolution
8.25 s every s - to check for any current fluctuations
outgoing ion beam
ASPOC normally operates with constant total current
Fluctuations of the outgoing ion beam may occur
extractor current
leakage current
total current (constant)

6. outgoing ion beam current
Data Products - 2
Example for small variations of the outgoing beam current
outgoing ion beam current
"total" current

7. outgoing ion beam current
Data Products - 3
Example for larger variations of the outgoing beam current
outgoing ion beam current
"total" current

8. Data Products - 4
Example for fast variations of the outgoing beam current, resolved by snapshot data
ion beam current at 0.5s reolution
ion beam current at 33ms reolution

9. Data Products - 5 STAT: Instrument status
5.15 s (10.3 s) time resolution
Operating mode, emitter start-up status, emitter cleaning
Describes reasons for deviations from the nominal beam current
Emitter ID and emitter module ID
Emitters show individual characteristics and performance
Anomaly flags
Give the reason for an anomaly, e.g. ignition failure
Ion beam energy
Total ion source current
Heater current
Heater voltage
Temperature of the ion source module
Raw spacecraft potential received from EFW through inter-experiment link (timing differs from EFW data product)

10. Data Products - 6
Command history with time stamps of the on-board execution
TC execution time
TC counter
TC code
TC mnemonic
TC description
TC parameter
All these data are delivered as daily files

11. Data Products - 7 There is one Instrument Caveat file per spacecraft
Contains caveats in text form and numerical quality parameters
Entries are span-valid (valid between mode changes)
These files are updated at each new delivery
Quality parameter define the quality of the spacecraft potential control, as to be expected from the ion current and its stability.
Time span: between mode changes, e.g., ion beam on or off, emitter change and resulting quality variations
Mean quality during time span
Minimum quality during time span
Maximum quality during time span
Comment (textual description associated with the average quality flag)

12. Software Development - Overview
Production software
Automated generation of data products
Validation software
Displays any combination of parameters and at any time scale
Used to support the validation process

13. Software Development - Production Software
Built upon Prime and Summary Parameter software
New software modules added for CAA: main module and CEF handling

14. Software Development - Production Software
The ASPOC CAA data processing software is written entirely in C (following the ANSI-C standard).
Implemented on a LINUX platform (Red Hat Linux 8.0)
Compiler: gcc (GNU compiler collection), version 3.2
Hosted on a HP Pro Liant server
The software has been validated against data sets with various performances of the ion emitters, in order to optimise the algorithm to calculate the quality flag.

15. Software Development - Validation Software
This software (written in IDL) is used to support the validation of the CAA ASPOC data products, and to update the instrument caveat files.
Main window of the validation tool:

16. Software Development - Validation Software
The validation software is capable of plotting selected parameters of the ASPOC CEF daily data files
Inputs either CEF or gzipped CEF (.cef or .cef.gz).
Allows to zoom into areas of special interest
Effectively any parameter present in the data set may be displayed

17. Data Delivery Schedule
Month
Task(s)
May 2006
Validation of the ASPOC data products for the 1st half of year 2003.
Jun 2006
Processing of the ASPOC data products for the 2nd half of year 2003.
Jul 2006
Validation of the ASPOC data products for the 2nd half of year 2003.
Aug 2006
Data delivery for the data products of year 2003.
Sep 2006
Online validation and iteration on the year 2003 data products.
Oct 2006
Processing of the ASPOC data products for the 1st half of year 2004.
Nov 2006
Validation of the ASPOC data products for the 1st half of year 2004.
Dec 2006
Processing of the ASPOC data products for the 2nd half of year 2004.
Jan 2007
Validation of the ASPOC data products for the 2nd half of year 2004.
Feb 2007
Data delivery for the data products of year 2004.
Mar 2007
Online validation and iteration on the year 2004 data products.
Apr 2007
Processing of the ASPOC data products for the 1st half of year 2005.
Sep 2007
Data delivery for the data products of year 2005.

18. Status of Data Products Provision
All products for 2001 and 2002 have been delivered
Documentation:
ASPOC CAA Interface Control Document Issue 1.2
ASPOC User Manual Issue 2.3

19. Summary
Software for production and validation developed and works well
Data products for 2001 and 2002 delivered
Further data deliveries according to agreed schedule