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attribute definition:
minimum_characters
The minimum_characters attribute provides the lower, inclusive bound on the number of characters. -
attribute definition:
occultation_type
occultation_type distinguishes between three types of occultation experiments: Stellar, Solar, or Radio. Stellar occultations involve observing a star as a targeted ring or body passes in front, as seen from either a spacecraft or Earth-based observatory. Solar occultations are similar to stellar occultations except that the Sun is used in place of a star. Radio occultations typically involve observing the continuous-wave radio transmissions from a spacecraft as it passes behind the target as seen from a radio telescope on Earth or another spacecraft. Required in labels of occultation observations. Normally not intended as a value for a table field. -
attribute definition:
description
The description attribute provides a statement, picture in words, or account that describes or is otherwise relevant to the object. -
attribute definition:
east_bounding_coordinate
The east_bounding_coordinate attribute provides the eastern-most coordinate of the limit of coverage expressed in longitude. -
attribute definition:
minimum_observed_event_time
minimum_observed_event_time gives the smallest value for observed_event_time in the associated data file. It is given in numeric seconds as an offset from the specified UTC reference time. minimum_observed_event_time is optional in labels since the data file time interval end point values are given by the required start_date_time_utc and stop_date_time_utc attributes in the Time_Coordinates class. -
attribute definition:
instrument_type
The instrument_type attribute identifies the type of an instrument. Example values: POLARIMETER SPECTROMETER -
attribute definition:
orbit_direction
The orbit_direction element provides the direction of movement along the orbit about the primary as seen from the north pole of the 'invariable plane of the solar system', which is the plane passing through the center of mass of the solar system and perpendicular to the angular momentum vector of the solar system orbit motion. PROGRADE for positive rotation according to the right-hand rule, RETROGRADE for negative rotation. -
attribute definition:
institution_name
The institution_name attribute provides the name of the associated institution. -
attribute definition:
sub_stellar_clock_angle
sub_stellar_clock_angle is an angle measured at a point in the ring plane, from the direction toward a star to the local radial direction. This angle is projected into the ring plane and measured in the clockwise (retrograde) direction. Equivalently, this is the prograde angle from the local radial direction to the direction toward the star. For stellar occultation data, this angle is equal to (180 - OBSERVED_RING_AZIMUTH) mod 360. It is available only for backward compatibility with previously published Cassini VIMS occultation data analysis; observed_ring_azimuth is the preferred quantity for archiving. sub_stellar_clock_angle is an optional data table field for Cassini VIMS occultation data; not recommended for other occultation data. In a label, the min and max variation attributes are optional for Cassini VIMS occultation data; not recommended for other occultation data. -
attribute definition:
instance_id
The instance_id attribute provides the formal name of a single occurrence of an object. -
attribute definition:
external_property_maps_id
The external_property_maps_id attribute provides the identifier of a property_maps instance external to this context. -
attribute definition:
pattern
The pattern attribute provides a symbolic instruction for forming values. -
attribute definition:
spheroid_name
The spheroid_name attribute provides the identification given to established representations of a planet's shape. -
attribute definition:
high_representation_saturation
The high_representative_saturation attribute specifies a special value whose presence indicates the true value cannot be represented in the chosen data type and length -- in this case being above the allowable range -- which may happen during conversion from another data type. The value must be less than the value of the valid_minimum attribute or more than the value of the valid_maximum attribute. Values of this attribute should be represented in the same data_type as the elements in the object with which the Special_Constants class is associated. -
attribute definition:
encoding_standard_id
The encoding_standard_id attribute provides the formal name of a standard used for the structure of an Encoded Byte Stream digital object. -
attribute definition:
formation_rule
The formation_rule attribute provides a 'user friendly' instruction for forming values. -
attribute definition:
record_delimiter
The record_delimiter attribute provides the character or characters used to indicate the end of a record. -
attribute definition:
namespace_id
The namespace_id attribute provides the abbreviation of the XML schema namespace container for this logical grouping of classes and attributes. It is assigned by the steward. -
attribute definition:
name
The name attribute provides a word or combination of words by which the object is known. -
attribute definition:
not_applicable_constant
The not_applicable_constant attribute provides a value that indicates the parameter is not applicable. -
attribute definition:
description
The description attribute provides a statement, picture in words, or account that describes or is otherwise relevant to the object. -
attribute definition:
system_requirements_note
The system requirements note attribute identifies what is necessary to process the software. -
attribute definition:
minimum_characters
The minimum_characters attribute provides the lower, inclusive bound on the number of characters. -
attribute definition:
start_bit
The start_bit attribute provides the position of the first bit within an ordered sequence of bits. -
attribute definition:
reference_type
The reference_type attribute provides the name of the association. -
attribute definition:
provider_site_id
The provider site id attribute provides an identifier for the provider. -
attribute definition:
minimum_characters
The minimum_characters attribute provides the lower, inclusive bound on the number of characters. -
attribute definition:
character_constraint
The character_constraint attribute limits the characters allowed. -
attribute definition:
description
The description attribute provides a statement, picture in words, or account that describes or is otherwise relevant to the object. -
attribute definition:
xml_schema_base_type
The xml schema base type attribute provides the data type needed for the XML schema implementation. -
attribute definition:
namespace_id
The namespace_id attribute provides the abbreviation of the XML schema namespace container for this logical grouping of classes and attributes. It is assigned by the steward. -
attribute definition:
type
The type attribute classifies the instrument host. When more than one value is correct, the value with the finest granularity should be selected. That is, choose "rover" rather than "spacecraft" when both would be correct since rover more narrowly defines the type of instrument host. -
attribute definition:
spacecraft_event_start_time_utc
spacecraft_event_start_time_utc gives the UTC time corresponding to the earliest time given by spacecraft_event_time in the data table. However, while spacecraft_event_time is given as seconds offset from a reference time, spacecraft_event_start_time_utc is given as a UTC date time. Required in the label for radio occultation data. Not used for stellar occultations. -
attribute definition:
maximum_characters
The maximum_characters attribute provides the upper, inclusive bound on the number of characters. -
attribute definition:
character_constraint
The character_constraint attribute limits the characters allowed. -
attribute definition:
unit_id
The unit_id attribute provides a character or character string that serves as an abbreviation for, or symbol representing, a unit of measure. -
attribute definition:
name
The name attribute provides a word or combination of words by which the object is known. -
attribute definition:
document_editions
The document_editions attribute provides a count of the total number of complete, distinct editions of the document. -
attribute definition:
constant_value
The constant value attribute provides the value to be used if an attribute is static. -
attribute definition:
description
The description attribute provides a statement, picture in words, or account that describes or is otherwise relevant to the object. -
attribute definition:
pixel_scale_x
The pixel_scale_x and pixel_scale_y attributes indicate the image array pixel scale (pixel/degree or pixel/distance) relative to the Cartesian (x,y) coordinate system as defined by the map projection. Due to varying properties across different map projections, actual surface distances for an individual pixel may be accurate only at specific location(s) within the image array (e.g. reference latitude or longitude, standard parallels, etc). For most PDS products, x and y scale values are equal ('square' pixels). The inclusion of both x and y attributes allows for anticipated products where scale may differ for each axis ('rectangular' pixels). NOTE1: For presentation of hard-copy maps, a map scale is traditionally expressed as a 'representative fraction' (the ratio of a hard-copy map to the actual subject surface (e.g. 1:250,000, where one unit of measure on the map equals 250,000 of the same unit on the body surface)). This usage is relevant when map/data are presented on hard-copy media (paper, computer screen,etc). When defining pixel scale within a stored image/array context here, we are expressing a ratio between the image array and the actual surface (thus, pixel/degree or pixel/distance units). NOTE2: Definition of this PDS4 attribute differs from how 'scale' was defined within PDS3 -
attribute definition:
minimum_value
The minimum_value attribute provides the lower inclusive bound on the value. -
attribute definition:
minimum_characters
The minimum_characters attribute provides the lower, inclusive bound on the number of characters. -
attribute definition:
unit_id
The unit_id attribute provides a character or character string which serves as an abbreviation for, or symbol representing, a unit of measure. -
attribute definition:
minimum_characters
The minimum_characters attribute provides the lower, inclusive bound on the number of characters. -
attribute definition:
name
The name attribute provides a word or combination of words by which the object is known. -
attribute definition:
character_constraint
The character_constraint attribute limits the characters allowed. -
attribute definition:
description
The description attribute provides a statement, picture in words, or account that describes or is otherwise relevant to the object. -
attribute definition:
unit_id
The unit_id attribute provides a character or character string which serves as an abbreviation for, or symbol representing, a unit of measure. -
attribute definition:
pattern
The pattern attribute provides a symbolic instruction for forming values.
Data Sets and Information