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Girish Kumar Beeharry Mauritius Radio Telescope. An African Low Frequency E-vlbi. Outline. · Preamble · Proposed Instrument · Station outline · Science · Technology · SWOT analysis · Cost & funding · Cooperation mechanism · Comments. Preamble.

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Girish kumar beeharry mauritius radio telescope

Girish Kumar Beeharry

Mauritius Radio Telescope

An African Low Frequency E-vlbi


  • · Preamble

  • · Proposed Instrument

  • · Station outline

  • · Science

  • · Technology

  • · SWOT analysis

  • · Cost & funding

  • · Cooperation mechanism

  • · Comments


- Countries thrived/thrive/(will thrive?) on their natural resources.

-It is now time to gear up to new science and

technology based avenues which can, without being exceedingly vatic, induce bootstrapped development.

-However, the prevalent attitude has bee/is to purchase first world technology which is customarily understood atend-user level but, sadly, not at that of research and development.

Rambling on...

-Another important issue is that of regional integration. Whilst, trade and industry are being promoted, there is a paucity of areas of cooperation in science and technology.

-Additionally, there is ample scope for bolstering higher education ventures.

- Promising science and technology fields are can be made to be at par with the other ones, provided there is sufficient federative and cohesive ground.

=One such potential field is now adumbrated.

Sadc sacu comesa au africa

An African Low Frequency E-vlbi: ALFE

-A sensitive high resolution multi-frequency dual polarity

instrument in the range 30 to 800 MHz using multiple stations of low-cost dipoles, such as log-periodic antennas.

- Baselines will range from a few metres, in one station, to some 250-500-1000-3000-5000 km-ish for the whole instrument.

- The instrument & each station is modular in nature

- A station will be able to function in its own right

- Subsets of the whole instrument could also be used..

- The desired final technical specifications of the whole

instrument are a function of the number of participants.

-The tentative technical specifications station and whole instrument are now examined.

ALFE: Station outline

- Each station is planned for observations on its own.

- Sufficient sensitivity and resolution built in.

- The front-end & the back-end should be integrated with the

data acquisition locally.

- The data pipeline should also cater for intra-station as well

as inter-station correlation.

-Local hub managing system which will be

synchronised, by the central hub, with other stations.

ALFE: Technology

- Near real time Very Long Baseline Interferometry(VLBI)

and electronic-VLBI

- Data Management

- High Capacity Correlation

- Digital Data Processing

- Antenna design

- Receiver system design

- Data acquisition system design

- Radio Frequency(RF) Electronics

- Networking

- Digital Subscriber Line(DSL) Communications

ALFE: Science

- Extremely Wide Field Imaging

- Issues of Non-coplanarity

- Analysis Algorithms for Radio Maps

- Solar: flares, coronal mass ejections

- The Galaxy and the galactic centre star forming regions

- Galaxies and clusters of galaxies,

- Pulsars

- Supernova Remnants

- Transient sources

- Spectral and recombination line observations

- Study of spectral indices of sources

- Interstellar scintillation: lower end of spectrum

- Jupiter: lower end of spectrum

- Ionospheric and Space Weather

- Geodesy and Cartography

African radioastronomy experience

- South Africa: >GHz, dish technology, strong engineering, AIPS, imaging, lines.

- Mauritius: < GHz, antenna technology, non-coplanar

phased array, extremely wide field imaging.

- Nigeria: Dish

-Other countries???



- Regions with relatively low noise

- As most of radio telescopes are concentrated in the Northern hemisphere, there have been very few (<1GHz) radio sky surveys in the South

- Flux at low frequency

- No multi-frequency simultaneous survey; much of the

interesting and important information is missing.


- Too much talking, not enough action

- Infrastructure

- Science & Technology

- Education



- Region can really use S&T to address the weaknesses

- Greater regional integration in S&T : SA has shown the way

to co-operation

- S&T Industry initiation in other African countries


- Immobility

- Lack of human resources

- Lack of funding

- Engineering & Technology Industry deficit

Cost & funding

Tentative Approximate Cost per station::

- Equipment & cabling: ~300,000 USD

- Building & access: ~ 200,000 USD


- Alms

- Governments

- Telecom industry


Co-operation Mechanism

- Easiest for project but most difficult to achieve in real life is an inter-governmental multilateral Memorandum of Understanding

- Bi-lateral at country's research apex body level

- University & Research institutional level

- Departmental & individual level


Suggestions, Please.