2.4.0 spase://CNES/NumericalData/CDPP-Archive/VEX/ASPERA4/VEX_ASPERA4_HK3MU VENUS EXPRESS: ASPERA-4 HK3MU Housekeeping Data Main Unit (CDF) https://doi.org/10.24400/802406/v02p-4n1v 2022-06-06T17:35:00Z This data set contains calibrated Housekeeping data incoming from the Main Unit (MU). spase://CNES/Person/CDPP-Archive/Stas.Barabash PrincipalInvestigator spase://CNES/Repository/CDPP-Archive/REGARDS-CDPP Online REGARDS https://regards.cnes.fr/user/cdpp/modules/1777?sp=DatasetName;q=DatasetName:VEX_ASPERA4_HK3MU Access via CNES Data Archive for CDPP CDF spase://CNES/Instrument/CDPP-Archive/VEX/ASPERA4/IMA InstrumentStatus 2005-12-09T00:00:00Z 2014-11-27T00:00:00Z Venus.Magnetosphere Hk_I_Plus_30V HK i +30V in milli-amperes mA Other Hk_I_Plus_5V HK i +5V in milli-amperes mA Other Hk_V_Plus_12V HK V +12V in Volts V Other Hk_V_Plus_30V HK V +30V in Volts V Other Hk_V_Plus_5V HK V +5V in milli-amperes mA Other Hk_V_Minus_12V HK V -12V in Volts V Other Hk_V_Minus_5V HK V -5V in Volts V Other Sun_Sensor_1 Sun sensor 1 output Other Sun_Sensor_2 Sun sensor 2 output Other IMA +/-5V on/off IMA +/-5V on/off The field takes one of the following values: 0 off 1 on Other IMA +30V on/off IMA +30V on/off The field takes one of the following values: 0 off 1 on Other IMA +/-12V on/off IMA +/-12V on/off The field takes one of the following values: 0 off 1 on Other Software mode Software mode Other CPU load CPU load Other Ima link status It contains status register of IEEE 1355 LINK Chip. This field value has to be decoded in Binary format. Bit description: bit: 7: ndata0A bit 6: crdMEM bit 5: datav bit 4: resetm bit 3: ffrx bit 2: EOP1 bit 1: ndata0 bit 0: nm1 In typical nominal operation one should find value 0x41 on the link when link is working properly. Other Mission phase The CRUISE sub-phase corresponds to data collected before the VOI (VENUS Orbit Injection), including the Near Earth Verification (NEV) and Interplanetary Cruise (IC) sub-phases. After the VOI, the nominal mission is divided into different VENUS mission sub-phases defined by the VENUS EXPRESS mission planning. Other Orbit number Orbit number Other Orbital Eccentricity Orbital Eccentricity Other Orbital Inclination Orbital Inclination Other Orbital Semimajor Axis Orbital Semimajor Axis Other Periapsis Altitude Periapsis Altitude Other Periapsis Argument Angle Periapsis Argument Angle ° 0.0174532925>rad Other Periapsis Time in milliseconds Periapsis Time in milliseconds. The time of periapsis passage is the time when the satellite reaches periapsis. Time base: J2000 Time scale: Terrestrial Time ms 1.0e-3>s Other Spacecraft Orientation The SPACECRAFT_ORIENTATION element defines the Venus Express direction of flight with respect to its spacecraft reference frame. The direction of flight is given as a 3-tuple (x,y,z). The paragraph below describes how to derive the (x,y,z) values. When the spacecraft is in nadir pointing mode, the +Z axis points towards the centre of Venus and the +X axis is perpendicular to the ground track. Unlike Mars Express, the speed vector of the spacecraft can be tilted from the +Y axis direction at an angle a. The 3-tuple (x, y, z) defines the coordinates of the normalised spacecraft speed vector. As a consequence, we have: x = sin a y = cos a rad Orientation