BelgaCom Lessive.
Satellite control station

LSVsite

"Sale de Controle"
(Control room)

LESSIVE 1 (Lsv-1)
Manufacturers: LTV, Dallas (the USA), Bell Telephone, Antwerp (Belgium).

Startup: September 21, 1972 (telephony, telex and data transmission).

Satellite: currently pointed on Intelsat 707 , 1œ Ouest (A.O.R., 359œ Is)

Type of the antenna: Cassegrain reflectors, standard Carrousel.

Composition of the antenna: aluminium alloy covered with a reflective painting.

Dimensions: total height, base included/understood: 35 meters; diameter of the parabola (128 panels): 30 meters.

Weight: moving part: 290 tons; reflectors the main thing: 53 tons; counterweight: 35 tons.

Tube central white: sheath elevator giving access to the cabin.

Equipment: electric system of de-icing behind the parabola; cabin containing the equipment of emission and reception; automatic tracking system of the satellite.

Tracking rate of the satellite: 0,002œ with 0,3œ a second (unperceivable displacement).

Influence winds: up to 50 km/h: normal operation; up to 70 km/h: operation in reduced quality; 110 km/h: passage in position of stowing; 190 km/h: passage in position of survival.

Frequencies used: emission: 6 GHz; reception: 4 GHz.

Polarization: circular.

Mode of transmission: analogical (AMRF: multiple access by distribution in frequency).

32M satellite anthena pointed on Intelsat 705. "See Lessive 2" for more details.

Lessive 2 (Lsv-2)
Manufacturers: AMP, Orsay (France), KNOWS, Brussels (Belgium).

Startup: November 23, 1983 (television, telephony, telex and data transmission).

Satellite: currently pointed on Intelsat 705 , Western 18œ (A.O.R., 342œ Is)

Type of the antenna: Cassegrain reflectors, standard Carrousel.

Composition of the antenna: aluminium alloy covered with a reflective painting.

Dimensions: total height, base included/understood: 34,50 meters; diameter of the parabola (208 panels): 32 meters.

Weight: moving part: 295 tons; reflectors the main thing: 53 tons.

Tube central white: periscope, comprising a set of four mirrors allowing to guide the wave to be emitted or received between the source and the reflectors secondary.

Equipment: electric system of de-icing for the parabola, the reflectors secondary and the periscope; base containing the equipment of emission and reception; automatic tracking system of the satellite, entirely controlled by computer.

Tracking rate of the satellite: lower than 0,01œ a second (unperceivable displacement).

Influence winds: normal operation up to 110 km/h, position of stowing beyond.

Frequencies used: emission: 6 GHz; reception: 4 GHz.

Polarization: circular.

Mode of transmission: analogical (AMRF: access multiple by distribution in frequency) and numerical (AMRT, multiple access by distribution in time).

18M satellite anthena.
Pointed on Eutelsat2 F3. See "Lessive 3" for more details

Lessive 3 (Lsv-3)
Manufacturers: NEC, Yokohama (Japan).

Startup: October 2, 1985 (television, telephony, telex and data transmission).

Satellite: currently pointed on Eutelsat Ii-f3 , 21,5œ Is

Type of the antenna: Cassegrain reflectors, standard Carrousel.

Composition of the antenna: aluminium alloy covered with a reflective painting.

Dimensions: height 22 meters; diameter of the parabola: 18 meters.

Weight: 86 tons.

Tube central white: grooved conical source and periscope with four mirrors.

Equipment: electric system of de-icing for the reflectors the main thing, the reflectors auxiliary, the periscope and the higher mirror; automatic tracking system of the satellite.

Tracking rate of the satellite: lower than 0,015œ a second for a speed of the wind of 50 km/h (unperceivable displacement).

Influence winds: normal operation: up to 120 km/h, position of stowing and survival: 200 km/h.

Frequencies used: emission: 14 GHz; reception: 11 GHz.

Polarization: linear.

Mode of transmission: AMRT (multiple access by distribution in time), television.

Lwssive 4 (Lsv-4)
Manufacturers: TIW (mechanical structure), Vertex (panels of the reflectors the main thing), Beel Alcatel (Antwerp).

Satellite: currently pointed on Intelsat 603 , Western 24,5œ (A.O.R., 335,5œ Is)

Type of the antenna: Cassegrain reflectors, standard Carrousel.

Dimensions: height 26 meters; diameter of the parabola: 18,30 meters.

Weight: 120 tons.

Equipment: system of de-icing by blowers with hot air behind the reflectors the main thing four blowers of 45 kw); Grooved conical source and periscope with four mirrors; system of monopulse continuation on signal of beacon: four engines with D.C. current of 5 CH (two for the azimuth and two for rise); teleprocessing by automats distributed and host computer.

Tracking rate of the satellite: lower than 0,015œ a second for a speed of the wind of 50 km/h (unperceivable displacement).

Influence winds: normal operation: up to 130 km/h, position of stowing and survival: 200 km/h.

Frequencies used: emission: 5,925 to 6,425 GHz; reception: 3,700 to 4,200 GHz.

Polarization: circular.

Amplifiers of power: three amplifiers with klystron of 3 kw and three amplifiers with SIGNAL of 700 W.

Mode of transmission: carrying type IDR, television

Lessive 5 (Lsv-5)
Manufacturers: Alcatel Telspace (antenna), TIW (control of position), Alcatel Bell (Antwerp).

Satellite: currently pointed on Intelsat 602 , 62œ Is (I.O.R.)

Type of the antenna: Cassegrain reflectors, standard Carrousel, food by periscope.

Dimensions: diameter of the parabola: 21,30 meters.

Equipment: system of de-icing by warm air heaters gas-fired behind the reflectors the main thing (five generators of 40 kw); system of monopulse continuation on signal of beacon: four engines with D.C. current of 7500 W (two for the azimuth and two for rise); teleprocessing by automats distributed and host computer.

Tracking rate of the satellite: lower than 0,05œ a second for a speed of the wind of 80 km/h (unperceivable displacement).

Frequencies used: emission: 5,850 to 6,425 GHz; reception: 3,625 to 4,200 GHz.

Polarization: circular.

Profit: emission: 61 dBi; reception: 58 dBi.

Amplifiers of power: four amplifiers with SIGNAL of 700 W.

Mode of transmission: carrying type IDR, television.