1 Coronas-F: payload, orbit, performance V. Slemzin CORONAS Complex ORbital ObservatioNs of Activity of the Sun 2 Observations of the Sun during 23th current solar cycle by CORONAS satellites CORONAS-F ***************** CORONAS-I ***************** Wolf numbers 3 CORONAS-F Instruments EUV/SXR1.Multi-channel Photometer (DIFOS) 2.Solar X-ray Telescope (SRT-K ) 3.X-ray Spectroheliograph (RES-K ) SXR/HXR4.Spectrometer (DIOGENESS) 5.X-ray Spectrometer (RESIK) 6.Solar X-Ray Spectropolarimeter (SPR-N ) Gamma7.Flare Spectrometer (IRIS) 8.Gamma Spectrometer (HELIKON) 9.X-ray Spectrometer (RPS ) 10.Time-Amplitude Spectrometer (AVS) UV11.Solar UV Radiometer (SUFR-sp-k ) 12.Solar UV Spectrophotometer (VUSS-L ) Cosmic rays13.MCL - Cosmic Ray Monitor 14.SCI-3 - Spectrometer of the Energy and Ion Chemical Composition 15.SONG - Solar Neutrons and -rays Spectrometer 16.Data Build-up System (SSNI) 4 CORONAS-F Instruments 5 Total mass 2.5 tons Scientific payload 600 kg Size 2x8 m 6 Launched July 31, 2001 Initial orbital parameters: apogee 541,1 km, perigee 497,1 km, inclination 82,48 , period 94,782 min. CORONAS-F Satellite: orbit Typical orbits: 15 orb/day Vis eclipses 33 min UV eclipses (h LOS > 450 km) 42 min Each 90 days : non-occulting orbits for 2-3 weeks 7 CORONAS-F Satellite: pointing Pointing to the Sun center, 2-axis. Drift of the X-axis less than 2.5, = 0.2 Angular speed of drift < 1/sec EUV imaging: 2-9 s expositions Determination of roll angle: by two sky cameras in the SPIRIT assembly (stars 6-8 m ) using Hipparcos catalog Roll speed