Package gaiasky.util.gaia

Class Satellite

java.lang.Object
gaiasky.util.gaia.Satellite
public class Satellite extends Object

  • Nested Class Summary

    Nested Classes
    Modifier and Type
    Class
    Description
    static @interface 
    Satellite.ParamMetaData
     

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    static final double
    BASICANGLE_DEGREE
    Basic angle, i.e., the angle between FoV2 (following FoV) and FoV1 (preceding FoV).
    static final double
    FOV_AC
    Total FoV (i.e., including dead zones between CCDs) in the across-scan direction per viewing direction (telescope)
    static final double
    FOV_AC_ACTIVE
    Total active FoV (i.e., excluding dead zones between CCDs) in the across-scan direction per viewing direction (telescope)
    static final double
    FOV_AL
    Total FoV (i.e., including 'intra-instrument' but excluding 'inter-instrument' dead zones between CCDs), in the along-scan direction, per viewing direction (telescope)
    static final double
    REVOLVINGPHASE_INITIAL
    Initial value \nu_0 of the revolving phase \nu at time t_0 corresponding to the scanning-law reference epoch (see parameter :Satellite:Mission_ReferenceEpoch_ScanningLaw_TCB)
    static final double
    SCANPHASE_INITIAL
    Initial value \Omega_0 of the scan (or spin) phase \Omega at time t_0 corresponding to the scanning-law reference epoch (see parameter :Satellite:Mission_ReferenceEpoch_ScanningLaw_TCB)
    static final double
    SCANRATE
    Value of the inertial scan rate (spin rate) of the satellite around the SRS z-axis, defined - for a given CCD TDI period (and along-scan pixel dimension) and the design-value of the telescope focal length - as the speed with which electrons move through the CCDs in TDI mode
    static final double
    SOLARASPECTANGLE_NOMINAL
    Nominal value of the constant angle between the SRS z-axis and the direction to the nominal Sun (also referred to as solar-aspect angle, SAA, revolving angle, and satellite scan-axis tilt angle)
    static final double
    SPINAXIS_NUMBEROFLOOPSPERYEAR
    The number of spin-axis revolutions around the solar direction per Julian year.

  • Constructor Summary

    Constructors
    Constructor
    Description
    Satellite()
     

  • Method Summary

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Field Details

    • SCANRATE

      public static final double SCANRATE
      Value of the inertial scan rate (spin rate) of the satellite around the SRS z-axis, defined - for a given CCD TDI period (and along-scan pixel dimension) and the design-value of the telescope focal length - as the speed with which electrons move through the CCDs in TDI mode

      Status: CDB
      Unit: arcsec s^-1
      Basic : false
      Scalar: true

    • SOLARASPECTANGLE_NOMINAL

      public static final double SOLARASPECTANGLE_NOMINAL
      Nominal value of the constant angle between the SRS z-axis and the direction to the nominal Sun (also referred to as solar-aspect angle, SAA, revolving angle, and satellite scan-axis tilt angle)

      Source: ESA, 21 May 2013, 'Gaia mission requirements document (MRD)', GAIA-EST-RD-00553, issue 3, revision 1, Requirement SCI-010. Reference document: A.G.A. Brown, U. Bastian, L. Lindegren, et al., 6 September 2006, 'On the definition of the solar aspect angle', GAIA-CG-TN-LEI-AB-010-02
      Status: CONF
      Unit: deg
      Basic : true
      Scalar: true

    • REVOLVINGPHASE_INITIAL

      public static final double REVOLVINGPHASE_INITIAL
      Initial value \nu_0 of the revolving phase \nu at time t_0 corresponding to the scanning-law reference epoch (see parameter :Satellite:Mission_ReferenceEpoch_ScanningLaw_TCB)

      Source: Current working hypothesis; the real value, which optimises GAREQ, is contained in an MDB table. Reference documents: L. Lindegren, 2 February 1998, 'The scanning law for Gaia', SAG-LL-014 (erratum SAG-LL-014A released 9 February 1998), L. Lindegren, 29 December 1998, 'Simulation of Gaia scanning of arbitrary directions', SAG-LL-026, L. Lindegren, 1 July 2000, 'Attitude parameterisation for Gaia', SAG-LL-030, and L. Lindegren, 19 February 2001, 'Calculating the Gaia nominal scanning law', SAG-LL-035
      Status: DEPR
      Unit: rad
      Basic : true
      Scalar: true

    • SCANPHASE_INITIAL

      public static final double SCANPHASE_INITIAL
      Initial value \Omega_0 of the scan (or spin) phase \Omega at time t_0 corresponding to the scanning-law reference epoch (see parameter :Satellite:Mission_ReferenceEpoch_ScanningLaw_TCB)

      Source: Current working hypothesis; the real value, which optimises GAREQ, is contained in an MDB table. Reference documents: L. Lindegren, 2 February 1998, 'The scanning law for Gaia', SAG-LL-014 (erratum SAG-LL-014A released 9 February 1998), L. Lindegren, 29 December 1998, 'Simulation of Gaia scanning of arbitrary directions', SAG-LL-026, L. Lindegren, 1 July 2000, 'Attitude parameterisation for Gaia', SAG-LL-030, and L. Lindegren, 19 February 2001, 'Calculating the Gaia nominal scanning law', SAG-LL-035
      Status: DEPR
      Unit: rad
      Basic : true
      Scalar: true

    • SPINAXIS_NUMBEROFLOOPSPERYEAR

      public static final double SPINAXIS_NUMBEROFLOOPSPERYEAR
      The number of spin-axis revolutions around the solar direction per Julian year. The value K = 5.8 guarantees a good long-term scan pattern on the sky. The basic requirement for K is to be non-integer such that K * xi >= 260 degrees (see SAG-LL-014)

      Status: CONF
      Unit: yr^-1
      Basic : true
      Scalar: true

    • BASICANGLE_DEGREE

      public static final double BASICANGLE_DEGREE
      Basic angle, i.e., the angle between FoV2 (following FoV) and FoV1 (preceding FoV). The sense of rotation is mathematically positive (counter-clockwise) about the +Z-axis of the SRS (Scanning Reference System; see U. Bastian, 5 July 2007, 'Reference systems, conventions, and notations for Gaia', GAIA-CA-SP-ARI-BAS-003-06, issue 6, revision 1, formerly known as GAIA-ARI-BAS-003); stars thus transit FoV1 first

      Source: EADS-Astrium, 4 June 2013, 'PayLoad Module (PLM) Requirements Specification', GAIA.ASF.SP.PLM.00009, issue 6, revision 0, Requirement PLM-386 and ESA, 21 May 2013, 'Gaia mission requirements document (MRD)', GAIA-EST-RD-00553, issue 3, revision 1, Requirement SCI-120
      Status: CONF
      Unit: deg
      Basic : true
      Scalar: true

    • FOV_AL

      public static final double FOV_AL
      Total FoV (i.e., including 'intra-instrument' but excluding 'inter-instrument' dead zones between CCDs), in the along-scan direction, per viewing direction (telescope)

      Status: CONF
      Unit: deg
      Basic : false
      Scalar: true

    • FOV_AC

      public static final double FOV_AC
      Total FoV (i.e., including dead zones between CCDs) in the across-scan direction per viewing direction (telescope)

      Status: CONF
      Unit: deg
      Basic : false
      Scalar: true

    • FOV_AC_ACTIVE

      public static final double FOV_AC_ACTIVE
      Total active FoV (i.e., excluding dead zones between CCDs) in the across-scan direction per viewing direction (telescope)

      Status: CONF
      Unit: deg
      Basic : false
      Scalar: true

  • Constructor Details

    • Satellite

      public Satellite()