Earth stations radio monitoring system of Ukraine Ukrainian State Centre of Radio Frequencies Space Radio Monitoring Station

Space radio monitoring station (with geolocation function)

Designation of the station -Measuring parameters of satellite stations emissions in the frequency bands C (from 3,4 to 4,2 GHz) and Ku (from 10,7 to 12,75 GHz); - Earth stations location (geolocation) in the above mentioned frequency bands.

Station capabilities

Earth Stations in the UCRF affiliates Одеса Симферополь Миколаїв Дніпропетровськ Донецьк Харків Запоріжжя Кіровоград Луганськ Севастополь Луцьк Рівне Житомир Ужгород Ів.-Франківськ Чернівці Тернопіль Хмельницький Вінниця Полтава Черкаси Чернігів Суми Херсон Київ Львів Total number of earth stations in Ukraine – 3276 as of 01 July, 2013

Compass – used for diagnostics, control over GeoMon terrestrial equipment and antenna pointing to satellites. Monics – used for measuring the earth stations emission parameters, satellite stations carrier frequencies and for maintenance the Monics data base. Sat ID – used for geolocation of earth stations and calculation of satellite ephemerides. Radiofrequency facilities – satellite antennas and electronic facilities to receive satellite signals for further measurement. The System Structure

Аntenna 2 Secondary Antenna 1 Primary ParameterAntenna 1 (Primary)Antenna 2 (Secondary) Antenna typeCassegrain Antenna Antenna size, m  7,3 m Frequency bandC/Ku Коефіцієнт підсилення, дБ49,73/58,4149,50/58,84 PolarizationCircular/Linear Azimuth travel120° Elevation travel0-90° Rotation angle on polarization+ 90°

Hardware system frequency monitoring

Control System Compass

Program Interface Monics

ParameterUnitParameter variants Modulation type -BPSK, QPSK, 8PSK, OQPSK, 16QAM, 16APSK, 32APSK, CW, MSK Symbol rate KBS Central frequency MHz Effective isotropic radiated power (e.i.r.p.) dBW Bandwidth kHz Carrier-to-noise ratio (C/No) dB-Hz Energy per bit to noise power spectral density ratio (Eb/No) dB Energy per symbol per noise power spectral density (Es/No) dB Data rate KBS Bit error rate - Carrier standard -DVB-S, DVB-S2, IESS-308, IESS-309, IESS-310, IESS-315 Forward error correction - 1/2, 2/3, 2/5, 3/4, 3/5, 30, 4/5, 5/6, 7/8, 8/9, 9/10 Earth station main measuring parameters

Conditions for successful geolocation

Earth Stations System GeoMon N E S Different travel paths allow to measure differential time offset (DTO) Different velocities of satellites allow to measure differential frequency offset (DFO) W Geolocation principle Earth station geolocation scenario

Potential accuracy of earth station geolocation

Digital map and ellipse with the target earth transmitting station

Illustration of geolocation case

Possibilities for geolocation

Geolocation is possible when TDOA and FDOA lines intersect

Geolocation is impossible when TDOA and FDOA lines do not intersect

Conditions necessary for geolocation Required: angular distance < 10° (С band) and < 8° (Ku band); intersecting service arias (оn uplink); the same uplink frequency; the same polarization; downlink footprint shall cover receiving station; known reference station. Recommended: precise ephemerides (more accurate than Norad TLE); minimum 3 reference transmitting stations; usage of the best time for measurements.

Mobile radio monitoring stations operating in the frequency range from 3 GHz to 40 GHz are used for detection of interference sources.

Footprints of which have national administration communication to measure the radiation of space stations

Thank you for attention Contact details: Ukrainian State Centre of Radio Frequencies Pr. Peremogy, 15 km Kyiv Ukraine Fax: