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9 CSIRO SEARFE project
9.1 Background
The SEARFE (Students Exploring Australia’s Radio-Frequency Environment) project is designed to
act as an educational resource for high school physics students as well as contributing to a
national study of radio interference throughout Australia, geared towards Australia’s bid for the
SKA telescope.
The SKA is an international project to design, and ultimately build a radio astronomical telescope
with an effective collecting area of one square kilometre [ 37 ]. Unlike traditional radio-
telescopes, the SKA will consist of many small antennae distributed across a large area. Together,
these antennas will yield a collection area of one square kilometre, significantly greater than any
radio telescope in existence. Currently Australia is a potential host country for the construction of
the SKA.
The SKA Outreach Project is an effort by the CSIRO to study Australia’s suitability and to increase
the likelihood of being selected as the host country. The SEARFE project, a subset of the SKA
Outreach project, is designed to involve students and to provide statistical data on the levels of
radio noise throughout Australia, particularly in remote areas. SEARFE is sponsored by IBM
Australia, BAE Systems Australia, Perth Observatory and Australian Geographic. This Chapter will
provide an overview of my involvement in the SEARFE project as the developer of the Spectrum
Scanner software.
9.2 Introduction
The Spectrum Scanner software is designed to be used by high school students to record radio
interference levels in their local area. The software uses a serial protocol to interface to the AOR-
AR3000A radio receiver and record the signal strength at various frequencies.
Although initial versions of the software were deployed on IBM laptops
i
running the Windows
operating system, a larger user base (of unknown platforms) is anticipated in the future. The Java
language’s platform independence will allow for seamless portability to these other platforms.
A prototype of the software was initially developed by George Warr. Although the concept was
proven to work, there were several fundamental problems with this initial implementation:
• Unreliable
o Crashed when switching modes
o Couldn’t scan twice, needed to restart the program
• No logging
• Visualisation errors
o Inconsistent data between plots
o Colour scale not correct
• Limited user interface
• Could not save plots
i
800x600 resolution, 2GB HDD, P133, 128MB Ram
- Oliver Mather 1
- Abstract 3
- Acknowledgements 5
- Contents 7
- List of Figures 9
- 1 Introduction 11
- 2 APT hardware 13
- 2.3 Mistral 14
- 2.4 Telescope 14
- 2.5 CCD 16
- 2.6 Telescope movement 16
- 2.6.1 Anti backlash motor 17
- 2.6.2 Limit switches 18
- 2.6.3 Tilt sensor 19
- 2.6.4 Macrostation 19
- 2.7 Masterswitch 20
- 2.8 Web cameras 21
- 2.10 Roof 22
- 2.11 ROTSE 23
- ParralelRS232RS232 24
- 3 APT software 25
- 3.3 Command line tools 26
- 3.4.1 Introduction 27
- 3.4.2 Architecture 27
- 3.5 APT server 28
- 4.1 Introduction 31
- 4.3 Code 32
- 4.3.2 Configuration 33
- 4.3.3 SNMP messages 33
- 4.4 JAS integration 34
- 4.4.1 Commands 35
- 4.4.2 Messages 36
- 4.5 Screenshots 37
- 4.6 Conclusion 38
- 5.1 Introduction 39
- 5.2 Architecture 40
- 5.3 Process manager 40
- 5.4 Roof 41
- 5.5 Chat system 43
- Figure 5-8 APT chat system 44
- 5.6 Look and Feel 45
- 5.6.2 Problems 46
- 5.6.3 Screenshots 46
- 5.7 Conclusion 47
- 6 APT software deployment 49
- 6.3.1 Versioning 50
- 6.3.2 Security 51
- 6.4 Compilation 52
- 6.5 Version synchronisation 55
- 6.6 Uploading 56
- 6.7 Conclusion 57
- 7.1 Introduction 59
- 7.2 Hardware 59
- 7.3 Software 59
- 7.3.2 Maintenance 60
- 7.3.3 Client SP server 60
- 7.3.4 Client error control 60
- 7.4 Conclusion 62
- 8 SkinnedTextField 63
- 8.4 TextSkin 64
- 8.5 SkinnedTextFieldDemo 65
- 9 CSIRO SEARFE project 69
- 9.3 Requirements 70
- 9.4 Hardware 71
- 9.5 Architecture 71
- 9.5.1 Data files 72
- 9.6 User interface 73
- 9.6.2 Data visualisation 76
- 9.7.1 Visualisations 80
- 9.8 Conclusion 81
- 10 Conclusion 83
- 10.4 Logging analysis 84
- Bibliography 87
- A. Glossary 89
- B.1. Introduction 91
- B.2. JAS message sender 91
- B.4. Creating JAS commands 91
- B.4.1. JASCommand object 92
- B.4.2. Installing commands 92
- B.5. JAS channel monitoring 93
- C. Software tools 95
- C.1.3. Checkout the code 96
- C.1.4. CVS user interfaces 96
- D. SNMP overview 97
- Response 98
- RequestRequest 98
- E. Astronomy primer 99
- E.1.3. Coordinate epochs 100
- E.2. Astronomical times 101
- E.3. Gamma ray bursts 102
- E.4. Astronomical filters 102
- E.5. Flat fielding 103
- E.6. Cosmic rays 103
- F. Selected code listings 105
- F.1.6. SnmpTrapDaemon.java 121
- F.2. APT deployment system 132
- F.2.3. apt build.xml 134
- F.2.4. lib build.xml 141
- F.3. CSIRO / SEARFE 144
- F.4. TextSkin 145
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