1. Ground Support Software
Swapnil Ralhan
C&DH
Space Sciences Laboratory
University of California, Berkeley

2. Ground Support Software Agenda
Requirements
GSE
Design Overview
Module Details
User Interface
Choice of Language
Development Plan
Comparison to GSEOS

3. Requirements

4. GSE – Design Overview F S W Display Command Recorder Test Harness
Interface F S W
Decoder
Telemetry

5. GSE – Design Overview F S W Interface Module
Command
Display
Recorder
Test Harness
Interface F S W
Interface Module
- Abstraction for FSW Interface
- Can be Serial, TCP/IP etc
Decoder
Telemetry

6. GSE – Design Overview F S W Command Module
Display
Recorder
Test Harness
Interface F S W
Command Module
- Converts commands given on interface to FSW Commands
- Combine Python constructs(looping etc) with FSW Commands to write test scripts
Decoder
Telemetry

7. GSE – Design Overview Telemetry Module F S W
- Looks at APID, calls appropriate Decoder function
Command
Display
Recorder
Test Harness
Interface F S W
Decoder
Telemetry

8. GSE – Design Overview Decoder Module F S W
- A set of functions, APID specific.
- Converts input data to an object of a data structure of type 'ApID_NNN'
- Includes formulas for display of formatted data
Command
Display
Recorder
Test Harness
Interface F S W
Decoder
Telemetry

9. GSE – Design Overview F S W Recorder Module
Command
Display
Recorder
Test Harness
Interface F S W
Recorder Module
- Records Incoming Telemetry and Outgoing Commands
- Provides Playback Capability
Decoder
Telemetry

10. GSE – Design Overview F S W Display Module
Command
Display
Recorder
Test Harness
Interface F S W
Display Module
- Simple module: provides screen for display of values
- Includes Upper and lower limits for values, and Notification functions can be attached to these
Decoder
Telemetry

11. Requirements

12. Choice of Language - Python
Dynamic Language
Easy Scripting
Availability of Support
Easy use of Object Oriented Programming
Existing Libraries:
Serial
Tkinter
Socket

13. Development Plan
Basic Versions of Interface, Command and Telemetry Exist
Decoder depends on CTM
Display next
Recorder.
ATS Generation System – meet Manfred to discuss

14. Comparison to GSEOS Easier to develop Completely open source
Well documented
Better documentation
No annoying undocumented scripts
Up-to-date
GSEOS uses Python 2.3, released 2003
Portability
Usable on Windows, Mac, Unix