Satellite Monitoring MoU in the framework of the CEPT

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Presentation transcript:

Satellite Monitoring MoU in the framework of the CEPT Jean-Philippe Kermoal 13th International Space Radio Monitoring Meeting Paris, 25th October 2011

Outline General on the MoU MoU Objectives Leeheim Station Leeheim Station’s Tasks MoU use from a CEPT perspective

General Satellite monitoring is expensive Administrations have to slim down A number of countries need to monitor satellites The ECC or its working groups need satellite monitoring

The MoU Germany France United Kingdom Switzerland The Netherlands Spain Luxembourg

SAT MoU CONTACT Frédéric Couturier Chairman couturier@anfr.fr Silvio Rubli Vice-chairman silvio.rubli@bakom.admin.ch

Main objectives of the MoU Satellite Monitoring The SAT MoU provides the possibility for any Administration of the CEPT to access and undertake satellite monitoring activities under the conditions of the MoU. Cooperation To create a common understanding and provide a cooperation among the signatories for getting measurement results (Leeheim Station) for their own purpose. Procedure Establish a procedure based on a non-profit making funding and a common management of satellite monitoring activities within the CEPT.

The management committee Prioritises measurements Set station fee and hourly rates Set administrative fee Evaluate reports and proposals

Costs Annual Contribution Measurements – Hourly rates Administrative Fee - Amount of money for the administration of the MoU by ECO European Monitoring Fund (EMF) - Amount of money at disposal for measurements in support of CEPT. Station Fee - Amount of money to partly cover the costs for the provision and maintenance of the Station Measurements – Hourly rates Personnel Equipments

European Monitoring Fund Finance mechanism Signatories of the SAT MoU Based on contributory units and in weighted voting Measurements request Signatories can place orders in written form to ECO CEPT Working Groups can propose orders to the ECO, which have to be approved by the SAT MoU. ECO forward the orders to Leeheim station

Customers of Leeheim Units or individuals responsible for: frequency management spectrum engineering etc… who are under German jurisdiction, or, authorities who are members of the CEPT SatMoU (EMF), or, satellite operators on a comparable contractual basis.

Leeheim Station – Germany .

Frequency range: 130 MHz  26.5 GHz (no gap) Antenna 2 Antenna 4 Antenna 3 Antenna 1 3,2 - 4,2 (17,7 – 22) GHz 1,5 -2,3 GHz 4,3 - 8,5 GHz 10,7-12,75 GHz 1 - 26,5 GHz 130 MHz - 1 GHz

System Characteristics - Antenna 1 L / S-Band 1,5 -2,3 GHz X-Band 4,3 - 8,5 GHz Ku-Band 10,7-12,75 GHz Beam Waveguide Cassegrain type 12mØ 44 - 61 dBi 17 - 34 dBK-1 monopulse autotracking ±1,5 dB; 10-12 full motion computer tracking

Antenna 3 130 MHz – 1 GHz full motion dipole array 2,4 * 2,4 m² 10-18 dBi computer controlled ±2dB; 10-12 full motion

Computer controlled antenna tracking of the Antennas 1, 3 and 4 allows to follow geostationary or non-geostationary satellites. Antenna 4 Multi band antenna (1-26.5 GHz) prime focus 7 m Ø 32 - 58 dBi 12 - 34 dBK-1 computer tracking ±1,6 dB; 10-12 full motion XY

Antenna 2 C-Band 3,2 - 4,2 GHz (Ka-Band 17,7 – 22 GHz, Start 2011) Cassegrain type 8,5 m Ø 49 dBi 28 dBK-1 computer controlled full motion

Omnidirectional Antennas Observe simultaneously all emissions from the sky in a certain frequency band, e.g. of a multi-satellite system (100 - 2500 MHz) 700 - 2500 MHz 100 – 1300 MHz

Transmitter Location System (TLS) neighbouring satellite interfered satellite Designed to identify the location of radio transmitters on Earth. Triangulation using the wanted transmitter and two satellites (time and frequency measurements). Mobile Reference Transmitter under procurement Monitoring Earth Station Leeheim interfering transmitter location unknown

Measurement Parameters The station can measure or determine emission characteristics such as: Frequency Doppler frequency shift Spectrum and bandwidth Class of emission and type of modulation Polarization Power flux density in the reference bandwidth Total power flux density EIRP In case of TV emissions: Sound sub carrier frequencies Coding Program sources etc.

Leeheim Station’s Task Spectrum Occupancy Monitoring Position Measurements Interference Measurements Pre-Launch Monitoring

1 - Spectrum Occupancy Monitoring Observe the radio frequency spectrum Identify “paper” satellites, unknown satellites, and for co-ordination with other authorities Results stored in a database and complemented with spectrum prints for each monitored emission. These measurements are applicable for the geostationary and the non-geostationary orbit.

2 - Position Measurements Where the inclination or ellipticity of a satellite orbit may cause interference to a neighbouring satellite The trace of the occupied position has to be measured. This is done with monopulse-tracking over a 24 hour period. The trace of the occupied position is given in geographical coordinates or in a celestial grid

3 - Interference Measurements Interference from space: Either from a known satellite (non-compliant signals) or an unknown satellite is the source (triangulation needed). Interference from Earth: It appears in the downlink of a satellite, transmitter location measurements are required.

4 - Pre-Launch Monitoring During the pre-phase of the launch of a satellite Frequencies used for telemetry, telecommand and tracking are monitored with respect to the planned orbit. The measurement results facilitate a safer launch and a safer positioning of the satellite.

An example of the use of Leeheim Station: Monitoring Glonass Emissions at 1.6 GHz CEPT requested the monitoring of GLONASS at 1.6 GHz satellites in order to assess the pfd levels radiated in the radioastronomy band by the new and old generation of GLONASS satellites, in the framework of WRC-07 AI 1.21. Leeheim produced a report

GLONASS Spectral measurement OLD GLONASS satellite Snapshot of the spectrum analyser NEW GLONASS satellite Snapshot of the spectrum analyser Source: WGSE (Doc 17SE21(06) Measurement of GLONASS unwanted emissions in the band 1610.6 -1613.8 MHz)

Glonass measurement results Modulation improved between the old and new GLONASS satellites (the null spikes have disappeared) Filter was implemented in the band 1610-1613 MHz in order to reduce the level of unwanted emissions by up to 19 dB in the RAS band.

Its use by the CEPT The output of the measurement useful for the CPM Report of WRC07 Chapter 2 on Agenda item 1.21 section 2/1.21/1.3.8 Studies of the RNSS (space-to-Earth)/RAS band pair 1 559-1 610 MHz/1 610.6-1 613.8 MHz Elaboration of ECC Report 171 (impact of unwanted emissions of Iridium satellites on radioastronomy operations in the band 1610.6-1613.8 MHz) (October 2011) by WGSE/SE40

Links Sat MoU website Leeheim station Station handbook MoU text (http://cept.org/eco/groups/eco/sat-mou) Leeheim station Station handbook MoU text

CONTACT ECO ECO Nansensgade 19-3 1366 Copenhagen Denmark Tel: +45 33 89 63 00 Fax: +45 33 89 63 30 eco@eco.cept.org Jean-Philippe Kermoal Spectrum Engineer jean-philippe.kermoal@eco.cept.org Susanne Have Secretary Administrative susanne.have@eco.cept.org