Recommendation ITU-R M.1802-1(04/2010)

Characteristics and protection criteria for radars operating in the

radiolocation service in the frequency band 30-300 MHz

M SeriesMobile, radiodetermination, amateur

and related satellite services

ii Rec. ITU-R M.1802-1

Foreword

The role of the Radiocommunication Sector is to ensure the rational, equitable, efficient and economical use of the radio-frequency spectrum by all radiocommunication services, including satellite services, and carry out studies without limit of frequency range on the basis of which Recommendations are adopted.

The regulatory and policy functions of the Radiocommunication Sector are performed by World and Regional Radiocommunication Conferences and Radiocommunication Assemblies supported by Study Groups.

Policy on Intellectual Property Right (IPR)

ITU-R policy on IPR is described in the Common Patent Policy for ITU-T/ITU-R/ISO/IEC referenced in Annex 1 of Resolution ITU-R 1. Forms to be used for the submission of patent statements and licensing declarations by patent holders are available from http://www.itu.int/ITU-R/go/patents/en where the Guidelines for Implementation of the Common Patent Policy for ITU-T/ITU-R/ISO/IEC and the ITU-R patent information database can also be found.

Series of ITU-R Recommendations (Also available online at http://www.itu.int/publ/R-REC/en)

Series Title

BO Satellite deliveryBR Recording for production, archival and play-out; film for televisionBS Broadcasting service (sound)BT Broadcasting service (television)F Fixed serviceM Mobile, radiodetermination, amateur and related satellite servicesP Radiowave propagationRA Radio astronomyRS Remote sensing systemsS Fixed-satellite serviceSA Space applications and meteorologySF Frequency sharing and coordination between fixed-satellite and fixed service systemsSM Spectrum managementSNG Satellite news gatheringTF Time signals and frequency standards emissionsV Vocabulary and related subjects

Note: This ITU-R Recommendation was approved in English under the procedure detailed in Resolution ITU-R 1.

Electronic PublicationGeneva, 2010

ITU 2010

All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without written permission of ITU.

Rec. ITU-R M.1802-1 1

RECOMMENDATION ITU-R M.1802-1

Characteristics and protection criteria for radars operating in theradiolocation service in the frequency band 30-300 MHz

(Question ITU-R 237/5)

(2007-2010)

Scope

This Recommendation describes VHF radiodetermination radars and provides technical parameters and protection criteria for some type of radars operating in the band 30-300 MHz.

The ITU Radiocommunication Assembly,

considering

a) that technical characteristics of radars operating in the radiodetermination service depend on specific applications, and could significantly vary, even within the same frequency band;

b) that within different ITU Regions as well as in different countries certain frequency bands in the range 30-300 MHz are allocated to the radiodetermination service;

c) that the VHF range provides unique capabilities for detecting objects at a very large distance, that is the most suitable for tracking and identification of space objects;

d) that analysis of frequency sharing between radiodetermination radars and systems in other services and determination of the feasibility of implementing new types of radiodetermination radars and to select appropriate frequency bands require knowledge of technical and operational characteristics of the systems operating in a specific frequency band,

recommends

1 that technical and operational characteristics and protection criteria of the radiolocation radars described in Annex 1 should be considered representative of those systems operating in the frequency range 30-300 MHz and used in studies of compatibility with systems in other services;

2 that Recommendation ITU-R M.1461 should be used as a guideline in analysing compatibility between radars operating in the radiodetermination service with systems in other services.

Annex 1

Technical and operational characteristics and protection criteriaof radar systems operating in the frequency range 30-300 MHz

1 Introduction

Representative characteristics of radiolocation radars operating in the frequency range 30-300 MHz are shown in Table 1. This information is required for assessment of compatibility between radars and systems in other services.

2 Rec. ITU-R M.1802-1

2 Technical characteristics

The frequency range 30-300 MHz is used by several different types of radars on fixed platforms within different ITU Regions as well as in different countries. Radiolocation functions performed in the band are space object recognition and tracing.

TABLE 1

Characteristics of radars operating in the frequency range 30-300 MHz

Parameter Value

Radar А Radar В Radar C

Radar type Primary ranging radar Primary ranging radar (bi-static)

Radar purpose Space object recognition and tracingFrequency band (MHz) 154-156 142-144Relative frequency instability 10–11 10–11 N/AOutput pulse power (min/max) (dBW) 27/46 40/46 47.2Mean output power (min/max) (dBW) 22/41 35/41 47.2Polarization LinearPulse duration (s) 13 000 3 200 N/ADuty cycle 0.322 N/AModulation type Pulse Continuous WaveAltitude above the ground level (m) 19 5Antenna type Phased arrayMaximum antenna gain (dB)– transmitter– receiver

2530

24N/A

Maximum antenna gain on the horizon (dB) 9 12Main beam pattern (degrees)– horizontal plane (Rx/Tx)– vertical plane (Rx/Tx)

2.6/5.22.6/2.6

820

Scan angle ranges (degrees):– horizontal plane– vertical plane

0-3602-70

4 sectors covering:

0-18030

Receiver noise temperature (K) 800 N/AOperational receiver passband (kHz) 0.132 625 50Necessary bandwidth (kHz) 0.132 625 < 1Emission class P0N MXN N0NI/N protection ratio (dB) −6

NOTE 1 – N/A – not applicable.