SE40 held its 66th meeting in Mainz (BNetzA), Germany. The meeting was attended by 25 participants from 8 administrations, ECO, EC and industry/operators. The main outcomes are summarised below.
Resolution of comments to the revision of ECC Report 217
The draft revised ECC Report 217 - The Use of Land, Maritime and Aeronautical Earth Stations on Mobile Platforms Operating with NGSO FSS Satellite Systems in the Frequency Range 17.3-20.2 GHz, 27.5-29.1 GHz and 29.5-30.0 GHz – was subject to public consultation, where 3 comments were received. All comments were taken onboard, in its entirety or with slight amendments. A consolidated version of Report was agreed for presentation to the next WG SE seeking its adoption for publication.
Sensing mechanism for uncoordinated FSS Earth stations in 28 GHz
This WI is a follow up from the ECC Report 304 which showed that under certain conditions the sensor might not be capable to fulfil the requirements necessary to detect all possible interfered FS links. It is now intended to develop an ECC Report evaluating requirements and parameters, e.g. threshold for the sensing mechanism for uncoordinated earth station in 28GHz to ensure proper detection of possible interfered FS links in the same band. Two contributions were received: one dealt with the requirements of the sensor when the power of the FS service is -10 dBm and the other with a proposed structure for the draft report. A working document towards a draft report was developed.
Compatibility between RNSS and amateur service - 1240-1300 MHz
The coexistence between the radionavigation-satellite service and the amateur service in the frequency band 1240 - 1300 MHz was discussed. Following the measurement provided from EC JRC and BNetzA, the IARU has presented information on typical amateur service station categories, deployment scenarios and activity levels in the band 1240-1300 MHz. The meeting agreed on a layout of the draft Report which will be further developed.
Revision of ERC Decision (99)06
Contributions were received by SE40 from the different proponents of systems S-PCS < 1 GHz, namely Hiber, ARGOS and SWARM. Following the instruction from WG SE as detailed in the description of the WI, a new draft report is envisaged (instead of updating ERC Report 87). A structure for the report was agreed and the material contained in the contributions was used as preliminary draft content for this draft report.
Letter from Sat_MoU
In order to respond to the request from the ECC on 3 questions, SE40 reviewed the text for Q1 and Q2. Intensive discussions took place in order to prepare the responses. As a result, SE40 prepared a draft document which will be further reviewed at the next SE40 meeting.
Iridium measurements
Iridium presented an analysis of the measurements of interference performed in summer 2019, confirming that the required protection levels for RAS had been achieved in the majority of the measurements, during that period when the full RASP mode was implemented. BNetzA presented a report of Iridium OOB emission measurements conducted during the period October –November 2019. The measurements showed, among other issues, that the emissions of Iridium were significantly higher than those measured during the Summer. BNetzA will provide Iridium with the raw data for further checking by Iridium.
Software modifications for the evaluation of the measurements of Iridium OOB emissions
Studies are ongoing concerning the modification of the existing scripts for the evaluation of Iridium OoB emissions in the RAS band to improve the precision of data loss calculation. An alternative method to process the raw data collected by the Leeheim antenna was considered as a potentially good compromise by the radio-astronomy. Considering that the issue of interference from Iridium is still pending, the meeting agreed to keep on hold his topic (i.e. the revision of ECC Report 247).