australian report -- the view from down under tasso tzioumis ([email protected]) australia...
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Australian Report --The view from down under
Tasso Tzioumis ([email protected])
Australia Telescope National Facility (ATNF)
CSIRO Astronomy and Space Science
RAFCAP2010 – Mitaka 5 June 2010
Radio Telescopes
CSIRO.
LBA Radio Telescopes in AustraliaLBA Radio Telescopes in Australia
x Katherine
x New Norciax Yarragadee
x ASKAP
x
New Radio Telescopes - Auscope
• AuScope VLBI Project• http://www-ra.phys.utas.edu.au/auscope/
• 3 new antennas
• Geodetic/astrometric VLBI observations – IVS
• Advanced construction
New Radio Telescopes – ASKAP & NZ
• First ASKAP antenna (from planned 36)• 12m antenna; Alt-Az mount
• 3rd axis motion for polarisation
• Very fast: 4 degs/second
• Interim VLBI system at 1400 MHz
• NZ Warkworth antenna• 12m antenna; Alt-Az mount
• Similar to AuScope
• Very fast: 4 degs/second
• Interim VLBI system at 1400 MHz
Latest image for LBA + NZ + 1st ASKAP antennaCentaurus A
Spectrum Issues
“Radio sensitive zones” in Australia
• Radio Act review 2002 – “radio sensitive zones”• Notification and coordination - no protection
• Regulatory RALI (2006) covers all Oz RA sites (MS31)• Studies by ACMA (administration)
Notification Zone Parameters
• Limits derived from RA.769 (+ ~10-15 dB) & VLBI• Propagation models from P.526 (Diffraction) and terrain models.
Notification Zones (km radius) Band (MHz)
Parkes Narrabri Mopra Hobart Ceduna Tidbinbilla
1 250-1 780 200 250 150 100 n/a 120
2 200-2 550 180 180 130 80 120 80
4 350-6 700 160 160 120 70 120 70
8 000-9 200 150 110 100 50 120 50
16 000-26 000 110 90 80 30 80 30
Management of Radio Notification Zones
• Email contact: [email protected]• Group email for RFI and Spectrum issues
• RALI MS31 – response within 1-week• Includes all existing radio telescopes in Australia
• ~ average 1 notification /month
• Work Collaboratively with Tx proponents• Works very well in practice
• Latest example• Network by Transgrid (power distribution company)
• Fixed links at ~6.5 GHz
• Proposed 6660 MHz link at 35 km to Parkes• Could affect Methanol observations at 6.7 GHz
• Moved channel allocation to not impact methanol • Informal emails & phone calls
Murchison Radio Observatory
Murchison Radio Observatory
gazetted towns: 0
population: “up to 160”
MRO (SKA) site protection
• Multi-layered protection• Ownership and control of central area (Boolardy)
• EMI controls
• Mineral resource management area – state govt• Radio Quiet Zone
• Embargo 41 (since 2005)
• RALI MS32 (since 2007) (available from ACMA website)
• Preserve, maintain and enhance radio-quieteness• Pathfinders now (ASKAP, MWA,…)
• SKA in future
Embargo 41
• In force since 2005• No new assignments in the range 100‑230 MHz within
150 km radius of the centre point of the RQZ.
• No new assignments in the range 230 MHz‑25.25 GHz within 100 km radius of the centre point.
• Applies to all apparatus licensed, coordinated terrestrial stations and earth stations within the specified zone. (Grand-fathering allowed…)
• Exceptions require a case-by-case consideration and approval of the Manager, Spectrum Planning and Engineering Section of the ACMA.
SKA RQZ in Australia
• Studies & definition by ACMA & CSIRO• RALI MS32 - in force since 24/9/2007
RALI MS 32 distances
100-230 MHz coordination
100-230 MHz restricted
>230 MHz restricted
Oz RQZ procedures
• From RALI MS32
Radiocommunications Act (1992)
• Governs all telecommunications in Australia• Radio astronomy already recognised
• Section 21 Astronomical and meteorological observations• This Act applies to a radio emission in connection with making
astronomical or meteorological observations in the same way as it applies to a radiocommunication.
• Wide scope for making regulations• Section 314 Regulations
• ……
• (2) ….. the regulations may make provision in relation to:• (a) prohibiting or regulating any act or thing likely to cause interference, or risk
of interference, to radiocommunications; or• (b) prohibiting or regulating making of radio emissions from a place within a
specified area; or …..
Next steps
• Maintain and strengthen RQZ• EMI
• Radiocommunications
• Use Radcommunications Act (1992) to:• Enact new regulations as needed• Strengthen/streamline current provisions
• New legislative instruments ?• Political support
• ACMA critical to success• Work with the regulator not against it!!
Contact UsPhone: 1300 363 400 or +61 3 9545 2176
Email: [email protected] Web: www.csiro.au
Thank you!
Questions?
Tasso [email protected]