Class Satellite
- java.lang.Object
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- gaiasky.util.gaia.Satellite
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public class Satellite extends java.lang.Object
Clone of the Satellite class in GaiaParams with very few needed parameters.
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Nested Class Summary
Nested Classes Modifier and Type Class Description static interface
Satellite.ParamMetaData
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Field Summary
Fields Modifier and Type Field Description static double
BASICANGLE_DEGREE
Basic angle, i.e., the angle between FoV2 (following FoV) and FoV1 (preceding FoV).static double
FOV_AC
Total FoV (i.e., including dead zones between CCDs) in the across-scan direction per viewing direction (telescope)static double
FOV_AC_ACTIVE
Total actice FoV (i.e., excluding dead zones between CCDs) in the across-scan direction per viewing direction (telescope)static 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 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 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 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 modestatic double
SOLARASPECTANGLE_NOMINAL
Nominal value of the constant angle between the SRS z-axis and the direction to the nominal Sun (also refered to as solar-aspect angle, SAA, revolving angle, and satellite scan-axis tilt angle)static double
SPINAXIS_NUMBEROFLOOPSPERYEAR
The number of spin-axis revolutions around the solar direction per Julian year.
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Constructor Summary
Constructors Constructor Description Satellite()
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Field Detail
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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 modeStatus: CDB
Unit: arcsec s^-1
Basic : false
Scalar: true
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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 refered 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
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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
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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
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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
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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 firstSource: 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
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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
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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
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FOV_AC_ACTIVE
public static final double FOV_AC_ACTIVE
Total actice 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
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