RES659 – 380 – ADD RESOLUTION 659 (WRC-15) Studies to accommodate requirements in the space operation service for non-geostationary satellites with short duration missions The World Radiocommunication Conference (Geneva, 2015), considering a) that the term “short duration mission” used in this Resolution refers to a mission having a limited period of validity of not more than typically three years; b) that examples of such satellites are given in Report ITU-R SA.2312, which provides technical characteristics; c) that Report ITU-R SA.2348 provides an overview of the current practice and procedures for notifying space networks currently applicable to these satellites; d) that, since the number of these satellites is growing, the demand for suitable allocations to the space operation service may increase; e) that it is important to ensure that any satellite radio-frequency operation avoids harmful interference to other systems and services; f) that the frequency bands below 1 GHz are used for a wide variety of terrestrial and space applications, that some of these frequency bands are heavily used and new allocations to the space operation service in these frequency bands should not put undue constraints on incumbent services; g) that some non-amateur satellites have used frequencies for telemetry, tracking and command in the frequency bands 144-146 MHz and 435-438 MHz which are allocated to the amateur-satellite service, and that such use is not in accordance with Nos. 1.56 and 1.57; h) that, according to No. 1.23, telemetry, tracking and command functions for satellites will normally be provided within the service in which the space station is operating; i) that these satellites are constrained in terms of low on-board power and low antenna gain as described in Report ITU-R SA.2312; j) that the bandwidth currently used by these satellites for telemetry, tracking and command in frequency bands below 1 GHz, as described in Report ITU-R SA.2312, is generally 0.1 MHz or less,