https://www.u-sphere.com/wiki/index.php?action=history&feed=atom&title=Radar_HF_de_ValensoleRadar HF de Valensole - Revision history2026-04-17T12:52:05ZRevision history for this page on the wikiMediaWiki 1.31.7https://www.u-sphere.com/wiki/index.php?title=Radar_HF_de_Valensole&diff=2964&oldid=prevUadmin at 00:16, 26 octobre 20052005-10-26T00:16:55Z<p></p>
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<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Version du 00:16, 26 octobre 2005</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Skywave radar, used since 1960 (?)</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Skywave radar, used since 1960 (?)</div></td></tr>
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<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>[[Image:<del class="diffchange diffchange-inline">Radar</del>.jpg|Radar_Valensole]]</div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>[[Image:<ins class="diffchange diffchange-inline">Biosphere-radar-HF</ins>.jpg|Radar_Valensole]]</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>"The Valensole HF radar consisted of several synchronised receivers</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>"The Valensole HF radar consisted of several synchronised receivers</div></td></tr>
</table>Uadminhttps://www.u-sphere.com/wiki/index.php?title=Radar_HF_de_Valensole&diff=2592&oldid=prevMediaWiki default at 22:57, 16 avril 20052005-04-16T22:57:25Z<p></p>
<p><b>Nouvelle page</b></p><div>LABORATOIRE DE PHYSIQUE DE L'ATMOSPHERE<br><br />
Pr Jean Delloue<br><br />
Station Catalany<br><br />
Route de Riez<br><br />
04210 VALENSOLE<br><br />
Tél : (33) 04 92 74 82 90 <br><br />
<br />
The Valensole HF radar : [http://www.mapquest.com/maps/map.adp?searchtype=address&formtype=latlong&latlongtype=decimal&latitude=43.8&longitude=6.10 43.8 N; 6.1 E]<br />
<br />
<br />
<br />
Radar doppler. Midlatitudes h'(f) perturbation.<br />
Gravity waves and emerging bow wave<br />
<br />
Perturbations foFE foF1 et front de l'onde de sillage<br />
<br />
Skywave radar, used since 1960 (?)<br />
<br />
[[Image:Radar.jpg|Radar_Valensole]]<br />
<br />
"The Valensole HF radar consisted of several synchronised receivers<br />
and beam forming techniques used to cover a large<br />
azimuthal sector with good angular resolution. It used a<br />
wide-beam antenna for northward transmission (3-db beam<br />
width at 15MHz was 60°) and a narrow beam, 560-m long<br />
linear array of 48 vertical antenna elements for phased-array<br />
reception. At the receiver, a steering unit switched the ar-<br />
ray beam in steps of 12° over seven adjacent sectors, each<br />
divided into 6 sub-sectors using digital beam forming. As<br />
such, a full azimuthal scan consisted of 42 elementary beams<br />
between 24°E and 58°W, each having a 3-db beam width of<br />
2° at 15 MHz. In this configuration, for example, the radar<br />
covered a zonal distance of 320 km at the 200-km range"<br />
<br />
<br />
"Ce centre est constitué d'un radar météorologique d'assez grande puissance (puissance émettrice 30 000 Watts) en onde courte permettant d'explorer la surface des mers afin d'en tirer divers paramètres. Il permet d'explorer la surface de l'Atlantique ou de la Méditerranée, sur une distance pouvant aller de 2000 à 3500 Km en ligne droite sur +- 45o, soit une superficie "arrosée" d'environ 4 millions de Km2. Son mode de fonctionnement est basé sur le décalage en fréquence à la réception de l'onde émise (effet Doppler-Fizeau), après traitement électronique et informatique on peut en tirer des renseignements comme la hauteur des vagues, leurs vitesses et directions ainsi que des renseignements sur des phénomènes comme la houle."<br />
<br />
"The 50-MHz Valensole radar (Prof. Jean Delloue) over the Grenoble region in France in an attempt to seek correlation between gravity wave activity and sporadic-E."</div>MediaWiki default