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H MODE [11 records]

Record 1 2007-02-01

English

Subject field(s)
  • Radar, Radio Guidance and Goniometry
CONT

Instead of scanning between different elevation sub-swaths, the Alternating Polarisation Mode(co-polar) scans between two polarisations, HH and VV, within a single swath(which is preselected, as for the Image Mode). In addition, there are two cross-polar modes, where the transmit pulses are all H or all V polarisation, with the receive chain operating alternatively in H and V, as in the CO-polar mode.

French

Domaine(s)
  • Radar, radioguidage et radiogoniométrie
CONT

Nous élargirons cette série temporelle de mesures en incluant ENVISAT en mode de polarisation alternée.

Spanish

Campo(s) temático(s)
  • Guía radárica, radioguía y radiogoniometría
Save record 1

Record 2 2007-01-31

English

Subject field(s)
  • Radar, Radio Guidance and Goniometry
  • Spacecraft
  • Remote Sensing
DEF

[A mode in which] the polarization direction is HH [horizontal] and VV [vertical].

CONT

The mission shall include a mode of operation that will allow a 250-500 km swath to be imaged continuously with a spatial resolution of at least 100 m. This mode must be a dual-polarization (HH/VV) mode.

CONT

RADARSAT-2 will be capable of transmitting horizontal(H) and vertical(V) polarizations and, depending on the selected mode, the sensor will receive either H or V signals or both of the signals simultaneously. Therefore, in addition to providing complete RADARSAT-1 continuity, RADARSAT-2 will generate products with VV polarization, cross-polarization(HV or VH), dual-polarization(HH+HV or VV+VH) or quad-polarization(HH+VV+HV+VH) over a range of spatial resolutions. This will allow the end-users to select the combination that is best for their specific application.

OBS

dual-polarization mode: term officially approved by the RADARSAT-2 Terminology Approval Group (RTAG).

Key term(s)
  • dual-polarisation mode
  • dual polarisation mode

French

Domaine(s)
  • Radar, radioguidage et radiogoniométrie
  • Engins spatiaux
  • Télédétection
OBS

RADARSAT-2 générera des produits co-polarisés verticalement (VV), en polarisation croisée (HV ou VH), en double polarisation (HH+HV ou VV+VH) ou en quadruple polarisation (HH+VV+HV+VH), et ce, avec une variété de résolutions spatiales. Ceci permettra aux utilisateurs de choisir la meilleure combinaison possible afin de répondre adéquatement à leurs besoins. Chaque signal reçu par le capteur (HH, VV, HV ou VH) possède une sensibilité particulière à diverses caractéristiques ou propriétés de surface, ce qui améliore la discrimination entre les surfaces. De plus, les données multi-polarisées peuvent être utilisées pour générer les signatures polarimétriques des éléments de surface; une information importante pour la caractérisation des mécanismes de rétrodiffusion du signal radar. Les données multi-polarisées seront donc très utiles pour résoudre les ambiguïtés au sujet des surfaces observées.

OBS

mode double polarisation : terme uniformisé par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).

Spanish

Campo(s) temático(s)
  • Guía radárica, radioguía y radiogoniometría
  • Naves espaciales
  • Teledetección
Save record 2

Record 3 2005-11-14

English

Subject field(s)
  • Radar, Radio Guidance and Goniometry
  • Spacecraft
CONT

Envisat's ASAR [Advanced Synthetic Aperture Radar] instrument is the first permanent spaceborne radar to incorporate dual-polarisation capabilities-the instrument can transmit and receive signals in either horizontal or vertical polarisation. This Alternating Polarisation(AP) mode can improve the capability of a SAR instrument to classify different types of terrain. Because the reflective properties of a surface are dependant on the polarisation of the incoming radar signal, the use of more than one type of polarisation provides valuable extra information. The ASAR AP mode provides two simultaneous images(or channels) of the same scene taken with different radar polarisation options. Since the radar can transmit and receive in both the horizontal(H) and vertical(V) polarisations, researchers can create image pairs, with possible combinations, HH&VV... HH&HV and VV&VH. A cross-polarisation option employs a channel in which the polarisation signal transmitted by the spacecraft is received on a different polarisation, i. e. transmitted using a horizontal polarisation and received on the vertical for an HV combination, or the reverse for a VH combination.

French

Domaine(s)
  • Radar, radioguidage et radiogoniométrie
  • Engins spatiaux
CONT

Le radar ASAR (Advanced Synthetic Aperture Radar) [...] à synthèse d'ouverture [,] dispose d'une antenne de 10 m et travaille en 5 modes différents avec des résolutions de 1 km à 30 m pour l'observation des terres émergées, des océans et des calottes polaires. (ESA, réalisé par Astrium)

OBS

Ce radar peut transmettre et recevoir à la fois en polarisation horizontale (H) et verticale (V) d'où la possibilité de créer des paires d'images en combinant HH et VV, HH et HV ou VV et VH.

Spanish

Save record 3

Record 4 2002-09-24

English

Subject field(s)
  • Radio Transmission and Reception
  • Telecommunications Facilities
DEF

A sectoral horn flared in the H plane only. The parallel sides are parallel to the electric field of the principal mode of the rectangular waveguide feeding the horn.

French

Domaine(s)
  • Émission et réception radio
  • Installations de télécommunications
DEF

Cornet sectoriel dont les deux faces parallèles sont parallèles au champ électrique du mode principal du guide rectangulaire qui l'alimente.

Spanish

Campo(s) temático(s)
  • Radiotransmisión y radiorrecepción
  • Instalaciones de telecomunicaciones
DEF

Bocina sectorial cuyas dos caras paralelas son paralelas al campo eléctrico del modo principal de la guiaonda rectangular que la alimenta.

Save record 4

Record 5 1986-12-30

English

Subject field(s)
  • Meteorology
OBS

References :"Initialization of Moisture in Primitive Equation Models", Lejenas, H, 1979, Monthly Weather Review, Vol 107, pp 1299-1305, and "On the Influence of the Technique of Nonlinear Normal Mode Initialization on the Nonconvective Precipitation Rate", Lejenas, H, 1980, Monthly Weather Review, Vol 108.

French

Domaine(s)
  • Météorologie
OBS

Référence pour le français (champ d'humidité) et l'anglais : "Précipitation des premières 24 heures"/"Precipitation in the First 24 Hours", traduit par T. Knowles.

Spanish

Save record 5

Record 6 1986-03-31

English

Subject field(s)
  • Meteorology
OBS

References :"Initialization of Moisture in Primitive Equation Models", Lejenas, H, 1979, Monthly Weather Review, Vol 107, pp 1299-1305, and "On the Influence of the Technique of Nonlinear Normal Mode Initialization on the Nonconvective Precipitation Rate", Lejenas, H, 1980, Monthly Weather Review, Vol 108.

French

Domaine(s)
  • Météorologie
OBS

Référence : "Filtrage spatial et post-traitement", "Principales différences entre V8 et V9", "Analyse de l'humidité", and "Bogus de l'humidité", Chapters IV - VII, Notes for RPN course ?

Spanish

Save record 6

Record 7 1986-03-31

English

Subject field(s)
  • Meteorology
OBS

References :"On the Influence of the Technique of Nonlinear Normal Mode Initialization on the Nonconvective Precipitation Rate", Lejenas, H, 1980, Monthly Weather Review, Vol 108, and "Precipitation Forecasts at the Canadian Meteorological Centre", David Davies and Marvin Olson, July 1972.

French

Domaine(s)
  • Météorologie
OBS

Référence pour le français et l'anglais : "Prévisions des quantités de précipitation"/"Quantitative Precipitation Forecasts".

Spanish

Save record 7

Record 8 1986-03-31

English

Subject field(s)
  • Meteorology
OBS

References :"On the Influence of the Technique of Nonlinear Normal Mode Initialization on the Nonconvective Precipitation Rate", Lejenas, H, 1980, Monthly Weather Review, Vol 108, and "Initialization of Moisture in Primitive Equation Models", Lejenas, H, 1979, Monthly Weather Review, Vol 107, pp 1299-1305.

French

Domaine(s)
  • Météorologie
OBS

Références : "Filtrage spatial et post-traitement", "Principales différences entre V8 et V9", "Analyse de l'humidité", and "Bogus de l'humidité", Chapters IV - VII, Notes for RPN course ?

Spanish

Save record 8

Record 9 1986-03-31

English

Subject field(s)
  • Meteorology
OBS

Reference :"On the Influence of the Technique of Nonlinear Normal Mode Initialization on the Nonconvective Precipitation Rate", Lejenas, H, 1980, Monthly Weather Review, Vol 108.

French

Domaine(s)
  • Météorologie
OBS

Référence pour le français et l'anglais: "Précipitation des premières 24 heures"/"Precipitation in the First 24 Hours", traduit par T. Knowles.

Spanish

Save record 9

Record 10 1986-03-31

English

Subject field(s)
  • Meteorology
OBS

References :"Case Study : Revised Analyses and Their Impact on a Numerical Forecast over the Eastern Pacific Ocean", E Kirkwood, & "Cloud and Precipitation Verification of CMC Subjective Prognosis", G Pellerin, in The Monthly Review, V II, No 12; "Parameterization of Clouds, Precipitation and Radiation for Forecast Models", Yves Delage, September 1979; and "On the Influence of the Technique of Nonlinear Normal Mode Initialization on the Nonconvective Precipitation Rate", Lejenas, H, 1980, Monthly Weather Review, Vol 108.

French

Domaine(s)
  • Météorologie

Spanish

Save record 10

Record 11 1986-03-31

English

Subject field(s)
  • Meteorology
OBS

References :"On the Influence of the Technique of Nonlinear Normal Mode Initialization on the Nonconvective Precipitation Rate", Lejenas, H, 1980, Monthly Weather Review, Vol 108, and "Initialization of Moisture in Primitive Equation Models", Lejenas, H, 1979, Monthly Weather Review, Vol 107, pp 1299-1305.

French

Domaine(s)
  • Météorologie
OBS

Référence pour le français et l'anglais : "Précipitation des premières 24 heures"/"Precipitation in the First 24 Hours", traduit par T. Knowles.

Spanish

Save record 11

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