'Naysmith' diaporamas de présentation

STGA Blue Badge Core Knowledge Art and Architecture Lecture 4 Enlightenment to Contemporary

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Molecules

Molecules. Two or more atoms joined together. They occur in atmospheres of cooler stars, cold clouds of gas, planets. Examples. H 2 = H + H CO = C + O CO 2 = C + O + O NH 3 = N + H + H + H (ammonia) CH 4 = C + H + H + H + H (methane). They have - electron energy levels (like atoms)

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Antennas in Radio Astronomy

Antennas in Radio Astronomy. Peter Napier. Outline. Interferometer block diagram Antenna fundamentals Types of antennas Antenna performance parameters Receivers. Interferometer Block Diagram. Antenna Front End IF Back End Correlator. E.g., VLA observing at 4.8 GHz (C band).

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Antennas and Receivers in Radio Astronomy

Antennas and Receivers in Radio Astronomy. Mark McKinnon. Outline. Context Types of antennas Antenna fundamentals Reflector antennas Mounts Optics Antenna performance Aperture efficiency Pointing Polarization Receivers. Importance of the Antenna Elements.

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