RES659 – 381 – further considering a) that these satellites may provide an affordable means to access orbital resources (spectrum and orbit) for new entrants in space; b) that the mass and dimensions of these satellites have been some of the major contributing factors to their success among new spacefaring nations; c) that the reliable control and tracking of satellites is important for the management of space debris, recognizing a) that the existing allocations to the space operation service below 1 GHz, where No. 9.21 applies, are not suitable for the satellites referred to in considering a) and b); b) that there are other frequency bands already allocated to the space operation service below 1 GHz where No. 9.21 does not apply; c) the provisions contained in No. 5.266 and No. 5.267 and Resolution 205 (Rev.WRC-15), resolves to invite the 2019 World Radiocommunication Conference to consider the results of ITU-R studies and take necessary action, as appropriate, provided that the results of the studies referred to in invites ITU-R below are complete and agreed by ITU-R study groups, invites ITU-R 1 to study the spectrum requirements for telemetry, tracking and command in the space operation service for the growing number of non-GSO satellites with short duration missions, taking into account No. 1.23; 2 to assess the suitability of existing allocations to the space operation service in the frequency range below 1 GHz, taking into account recognizing a) and current use; 3 if studies of the current allocations to the space operations service indicate that requirements cannot be met under invites ITU-R 1 and 2, to conduct sharing and compatibility studies, and study mitigation techniques to protect the incumbent services, both in-band as well as in adjacent bands, in order to consider possible new allocations or an upgrade of the existing allocations to the space operation service within the frequency ranges 150.05-174 MHz and 400.15-420 MHz, invites Member States and ITU-R Sector Members, Associates and Academia to participate in studies by submitting contributions to ITU-R.