scope:

Introduction

The bands 400.15-406 MHz (referred to as the 403 MHz bands throughout) and 1 668.4-1 700 MHz (referred to as the 1 680 MHz band throughout) are allocated to MetAids on a primary basis. The bands 400.15-403 MHz and 1 670-1 700 MHz are also allocated to the meteorological satellite (METSAT) users on a co-primary basis; and the band 400.15-401 MHz is allocated to the mobile satellite service (MSS) worldwide, and the bands 1 675-1 700 MHz are allocated to the MSS on a co-primary, non-interference basis in ITU Region 2.

The terms MetAids is used to describe a variety of types of meteorological equipment; radiosondes, dropsondes and rocketsondes. MetAids are flown worldwide for the collection of upper atmosphere meteorological data for weather forecasts and severe storm prediction, collection of ozone level data, and measurement of atmospheric parameters for various military applications. The data collected from these flights, or soundings, is of extreme importance for the protection of life and property through the prediction of severe storms and providing vital data for commercial airlines operations.