/*********************** HG COORDS TEMPLATE ***********************************/ /* MODIFICATIONS: /* 921028 -- SJOY /* created template /* 921103 -- EFRIED /* last modifications /* Template: Coordinate System Template Rev: 19890121 */ /* Note: The following templates form part of a standard */ /* set for the submission of a Coordinate System */ /* to the PDS. */ /* Hierarchy: COORDINATE */ /* COORDINFO */ /* VECTOR */ /* VECTORCOMP */ /* VECTORD */ OBJECT = COORDINATE COORDINATE_SYSTEM_ID = HG OBJECT = COORDINFO COORDINATE_SYSTEM_NAME = "MEAN INERTIAL HG 1950" COORDINATE_SYSTEM_CENTER_NAME = SUN COORDINATE_SYSTEM_REF_EPOCH = "UNK" /* 09-23-1950 */ COORDINATE_SYSTEM_DESC = " The Heliographic coordinate system is defined in the reference epoch of 1950. The unit vectors which define the coordinate system are as follows: X points away from the Sun towards the ascending node, in the solar equatorial plane, Z points along the Sun's spin axis, positive above the equatorial plane, and Y completes the right handed set." END_OBJECT = COORDINFO OBJECT = VECTOR VECTOR_COMPONENT_TYPE = RANGE OBJECT = VECTORCOMP VECTOR_COMPONENT_ID = R REFERENCE_OBJECT_NAME = SUN REFERENCE_TARGET_NAME = SPACECRAFT VECTOR_COMPONENT_UNIT = AU END_OBJECT = VECTORCOMP OBJECT = VECTORD VECTOR_COMPONENT_TYPE_DESC = " The range or R component of the spherical Heliographic coordinate system is the distance from the Sun's position at the reference epoch to the spacecraft measured in AU." END_OBJECT = VECTORD END_OBJECT = VECTOR OBJECT = VECTOR VECTOR_COMPONENT_TYPE = LATITUDE OBJECT = VECTORCOMP VECTOR_COMPONENT_ID = LAT REFERENCE_OBJECT_NAME = SUN REFERENCE_TARGET_NAME = SPACECRAFT VECTOR_COMPONENT_UNIT = DEGREES END_OBJECT = VECTORCOMP OBJECT = VECTORD VECTOR_COMPONENT_TYPE_DESC = " The latitude component of the the spherical Heliographic coordinate system is the angle between the solar equatorial plane of the reference epoch measured in the plane that contains the solar spin axis of that epoch." END_OBJECT = VECTORD END_OBJECT = VECTOR OBJECT = VECTOR VECTOR_COMPONENT_TYPE = LONGITUDE OBJECT = VECTORCOMP VECTOR_COMPONENT_ID = LONG REFERENCE_OBJECT_NAME = SUN REFERENCE_TARGET_NAME = SPACECRAFT VECTOR_COMPONENT_UNIT = DEGREES END_OBJECT = VECTORCOMP OBJECT = VECTORD VECTOR_COMPONENT_TYPE_DESC = " The longitude component of the spherical Heliographic coordinate system is zero in the direction of the ascending node at the reference epoch (X direction) and increases for a body orbiting the Sun as the Earth does." END_OBJECT = VECTORD END_OBJECT = VECTOR OBJECT = VECTOR VECTOR_COMPONENT_TYPE = X OBJECT = VECTORCOMP VECTOR_COMPONENT_ID = X REFERENCE_OBJECT_NAME = SUN REFERENCE_TARGET_NAME = "ASCENDING NODE" VECTOR_COMPONENT_UNIT = AU END_OBJECT = VECTORCOMP OBJECT = VECTORD VECTOR_COMPONENT_TYPE_DESC = " The X component of the Heliographic coordinate system points away from the Sun, towards the ascending node, and lies in the solar equatorial plane." END_OBJECT = VECTORD END_OBJECT = VECTOR OBJECT = VECTOR VECTOR_COMPONENT_TYPE = Y OBJECT = VECTORCOMP VECTOR_COMPONENT_ID = Y REFERENCE_OBJECT_NAME = SUN REFERENCE_TARGET_NAME = "N/A" VECTOR_COMPONENT_UNIT = AU END_OBJECT = VECTORCOMP OBJECT = VECTORD VECTOR_COMPONENT_TYPE_DESC = " The Y vector of the Heliographic coordinate system is formed by the righthanded cross product of the X and Z unit vectors. It lies in the solar equatorial plane and it points away from the Sun, but does not extend in the direction of any particular body." END_OBJECT = VECTORD END_OBJECT = VECTOR OBJECT = VECTOR VECTOR_COMPONENT_TYPE = Z OBJECT = VECTORCOMP VECTOR_COMPONENT_ID = Z REFERENCE_OBJECT_NAME = SUN REFERENCE_TARGET_NAME = "SUN SPIN AXIS" VECTOR_COMPONENT_UNIT = AU END_OBJECT = VECTORCOMP OBJECT = VECTORD VECTOR_COMPONENT_TYPE_DESC = " The Z component of the Heliographic coordinate system is parallel to the Sun's spin axis, taken as positive above the equatorial plane of the Sun." END_OBJECT = VECTORD END_OBJECT = VECTOR END_OBJECT = COORDINATE /********************** NLS COORDS TEMPLATE ***********************************/ /* MODIFICATIONS: /* 921028 -- SJOY /* created template /* Template: Coordinate System Template Rev: 19890121 */ /* Note: The following templates form part of a standard */ /* set for the submission of a Coordinate System */ /* to the PDS. */ /* Hierarchy: COORDINATE */ /* COORDINFO */ /* VECTOR */ /* VECTORCOMP */ /* VECTORD */ OBJECT = COORDINATE COORDINATE_SYSTEM_ID = NLS OBJECT = COORDINFO COORDINATE_SYSTEM_NAME = "NEPTUNE WEST LONGITUDE SYSTEM" COORDINATE_SYSTEM_CENTER_NAME = "NEPTUNE" COORDINATE_SYSTEM_REF_EPOCH = "UNK" /* 1989-08-25:03:56:00.000 */ COORDINATE_SYSTEM_DESC = " The orientation of Neptune's pole is specified by a right ascension of 298.90 and declination of 42.84 at the time of the encounter, as given in the Jet Propulsion Laboratory's distribution of physical constants dated 11/06/89. Planetary longitudes are based on a 16.11 hour rotation period (Warwick et al., 1989) adopted by the Voyager Project shortly after the encounter. The zero longitude is defined by the requirement that the West Longitude of the spacecraft at 0356 SCET day 237 (near closest approach) be 167.7 NLS; West Longitudes of the Neptune Longitude System (NLS) are simply related to the angle PHI: WLONG = 360. - PHI (degrees) This definition of the zero longitude was adopted by the Voyager Project Steering Group in order to minimize differences in longitudes resulting from changes in the assumed rotation period. " END_OBJECT = COORDINFO OBJECT = VECTOR VECTOR_COMPONENT_TYPE = RANGE OBJECT = VECTORCOMP VECTOR_COMPONENT_ID = R REFERENCE_OBJECT_NAME = NEPTUNE REFERENCE_TARGET_NAME = VOYAGER VECTOR_COMPONENT_UNIT = "RN (Rn = 24,765km)" END_OBJECT = VECTORCOMP OBJECT = VECTORD VECTOR_COMPONENT_TYPE_DESC = " Range from the planet center to the spacecraft in units of Rn where Rn = 24,765km." END_OBJECT = VECTORD END_OBJECT = VECTOR OBJECT = VECTOR VECTOR_COMPONENT_TYPE = LATITUDE OBJECT = VECTORCOMP VECTOR_COMPONENT_ID = LAT REFERENCE_OBJECT_NAME = NEPTUNE REFERENCE_TARGET_NAME = VOYAGER VECTOR_COMPONENT_UNIT = DEGREES END_OBJECT = VECTORCOMP OBJECT = VECTORD VECTOR_COMPONENT_TYPE_DESC = " Spacecraft latitude in degrees. Valid range -90.0 -> +90.0." END_OBJECT = VECTORD END_OBJECT = VECTOR OBJECT = VECTOR VECTOR_COMPONENT_TYPE = LONGITUDE OBJECT = VECTORCOMP VECTOR_COMPONENT_ID = W_LONG REFERENCE_OBJECT_NAME = NEPTUNE REFERENCE_TARGET_NAME = VOYAGER VECTOR_COMPONENT_UNIT = DEGREES END_OBJECT = VECTORCOMP OBJECT = VECTORD VECTOR_COMPONENT_TYPE_DESC = " West longitude where the zero longitude is defined by the requirement that the West Longitude of Voyager 2 at 1989-08-25T03:56:00.00 was 167.7 degrees." END_OBJECT = VECTORD END_OBJECT = VECTOR END_OBJECT = COORDINATE