<?xml version="1.0" encoding="UTF-8"?>
<Instrument xmlns="https://metadata.pithia.eu/schemas/2.2" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xlink="http://www.w3.org/1999/xlink" xsi:schemaLocation="https://metadata.pithia.eu/schemas/2.2 https://metadata.pithia.eu/schemas/2.2/pithia.xsd">
<identifier>
<PITHIA_Identifier>
<localID>Instrument_EISCAT_UHF</localID>
<namespace>eiscat</namespace>
<version>1</version>
<creationDate>2022-10-03T10:49:00Z</creationDate>
<lastModificationDate>2022-10-19T09:01:02Z</lastModificationDate>
</PITHIA_Identifier>
</identifier>
<name>EISCAT UHF Incoherent scatter radar</name>
<description>
An incoherent scatter radar transmits a radiowave of high power
and a tiny fraction of the power is scattered back. The spectrum
of the scattered signal depends on plasma waves propagating in
the ionosphere and from the shape of the spectrum the
temperature of electrons and ions can be determined. The
scattered power or electron plasma frequency shift can give the
electron density and the Doppler shift gives the ion drift
velocity. Being high power large aperture radars, the
instruments are also useful for other purposes, including meteor
research and space debris mapping. The mainland UHF radar in
Tromsø started observing in 1981. It operates at 930 MHz and has
a fully steerable 32m dish antenna.
</description>
<type xlink:href="https://metadata.pithia.eu/ontology/2.2/instrumentType/IncoherentScatterRadar"/>
<operationalMode><InstrumentOperationalMode>
<id>isr</id>
<name>IncoherentScatter</name>
<description>
The main use of incoherent scatter radars is ionospheric
research, where coded pulses are transmitted and
received. Decoding gives autocorrelation function estimates
at selectable time and range resolutions, and theoretical
scatter spectra can be fitted to these using standard
Fourier transform theory. The UHF radar operates at 930 MHz
and is suitable for general ionospheric E-layer, F-layer and
topside measurements.
</description>
</InstrumentOperationalMode>
</operationalMode>
</Instrument>
