Using a small phased array for meteor observations A. Martnez Picar - - PowerPoint PPT Presentation

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Using a small phased array for meteor observations A. Martnez Picar - - PowerPoint PPT Presentation

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International Meteor Conference September 2124, 2017 Petnica Serbia Using a small phased array for meteor observations A. Martnez Picar and C. Marqu Solar-Terrestrial Royal Observatory Centre of of Belgium Excellence Sun

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SLIDE 1

Using a small phased array for meteor observations

  • A. Martínez Picar and C. Marqué

Solar-Terrestrial Centre of Excellence Royal Observatory

  • f Belgium

International Meteor Conference

September 21–24, 2017 Petnica – Serbia

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SLIDE 2

Sun – Earth Interaction

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SLIDE 3

Sun – Earth Interaction

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SLIDE 4

Sun – Earth Interaction

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SLIDE 5

ROB / Solar Influences Data Center

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SLIDE 6

ROB / Solar Influences Data Center

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SLIDE 7

ROB / Solar Influences Data Center

Space Instruments

USET

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SLIDE 8

ROB / Solar Influences Data Center

Space Instruments Ground–Based Facilities

USET

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SLIDE 9

ROB / Solar Influences Data Center

Space Instruments

USET Humain Radio–Astronomy Station

Ground–Based Facilities

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SLIDE 10

Humain Radio–Astronomy Station

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SLIDE 11

Humain Radio–Astronomy Station

Decomissioned interferometer (ROB) Meteorological Instruments (RMI) Meteor & Whistler instruments (BISA) Optical Telescopes (ROB) Radio Solar Spectrographs (ROB)

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SLIDE 12

Humain Radio–Astronomy Station

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SLIDE 13

Humain Radio–Astronomy Station

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SLIDE 14

Humain Radio–Astronomy Station

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SLIDE 15
  • No mechanical parts
  • Digital post-processing

allows high flexibility

  • Near–realtime dynamic

spectrum observations

SPADE: Small Phased Array Demonstrator

  • Small Array of 8 elements
  • Software Defined Radio

based receivers → Digital beamforming

  • Main goal: Dynamic spectra (not imaging)
  • Frequency Range: 20 – 80 MHz

Kick–off: January 2016

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SLIDE 16
  • No mechanical parts
  • Digital post-processing

allows high flexibility

  • Near–realtime dynamic

spectrum observations

SPADE: Small Phased Array Demonstrator

  • Small Array of 8 elements
  • Software Defined Radio

based receivers → Digital beamforming

  • Main goal: Dynamic spectra (not imaging)
  • Frequency Range: 20 – 80 MHz

BRAMS beacon

It must be also good for radio meteor

  • bservations!

Kick–off: January 2016

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SLIDE 17

Phased Array

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Array Element Element’s Pattern

Ø0 Ø3 Ø2 Ø1

Tied Array Beam

  • Sum of incoming signals
  • Adding an appropriate phase delay:
  • Steer the main beam
  • Manipulate the beam shape
  • Direct the placement of nulls
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SLIDE 18

PC

Phased Array – Digital Beamforming

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Array Element Element’s Pattern

Ø0 Ø3 Ø2 Ø1

Tied Array Beam SDR

SDR0 SDR1 SDR2 SDR3 RF Signal Data Stream (GbEthernet)

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SLIDE 19

Array Element

Antenna

  • Cross thick inverse vee
  • Additional conductive grid underneath
  • Dual polarisation available

Front End Electronics

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SLIDE 20

Array Configuration

The layout of the array must provide a symmetric beam with low sidelobe levels Elliptical “Fat Cross” Double Spiral

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Array Configuration

The layout of the array must provide a symmetric beam with low sidelobe levels

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SLIDE 22

Building SPADE

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SLIDE 23

Building SPADE

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Building SPADE

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Building SPADE

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Building SPADE

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SLIDE 27

So… when?

First Light scheduled for December 2017