urn:nasa:pds:cassini_vims_saturn:data_raw:body-geometry 1.0 1.11.0.0 Product_Metadata_Supplemental M. R. Showalter, R. S. French, M. W. Evans, M. K. Gordon, and M. S. Tiscareno 2020 metadata This table describes the intercept geometry for bodies within the field of view of Cassini VIMS image cubes. 2019-08-03 1.0 Initial delivery body-geometry.tab 2020-03-29T17:50:50 316441797 655159 f896598acf230b4677a1637c804b68b6 This table describes the intercept geometry for bodies within the field of view of Cassini VIMS image cubes. 0 655159 This index describes the intercept geometry for Saturn, the regular satellites, and other targeted bodies within the field of view of Cassini VIMS cubes. The table contains zero or more rows for each data file found in the data set. For each cube, the file contains one row for each regular satellite or other targeted body that falls within the VIS field of view, plus the same for each such body that falls within the IR field of view. Occasionally, SPICE pointing information is unavailable for the time at which a cube was exposed. When this situation occurs, no rows have been added to the file. Most of this geometry information has been constructed by sampling every VIMS spatial pixel in the associated data file. For each sampled pixel, a variety of geometric quantitities have been calculated, and the minimum and maximum values of each quantity have been tabulated. Note that, for angular quantities that cycle from 360 degrees to zero, the tabulated minimum can be numerically greater than the maximum. If a targeted body does not fall within the field of view, values of the NULL_CONSTANT appear in the table. Regions of a body that are obscured by Saturn or by a targeted moon are excluded from the tabulation. The dark side of each body is also generally excluded. If a body is too small to have been captured in this spatial sampling of the cube, then the associated NULL_CONSTANT will appear in each column. Note that the last nine columns of the table contain quantities that are independent of the field of view. These quantities are tabulated as single values rather than as minimum/maximum pairs. Additional Note: This file was generated by merging and sorting the contents of two metadata files available from the PDS Ring-Moon Systems Node: COVIMS_0999_saturn_summary.tab COVIMS_0999_moon_summary.tab These files are available from the Node at this URL: https://pds-rings.seti.org/viewmaster/metadata/COVIMS_0xxx/COVIMS_0999 They were downloaded on July 30, 2019. Two additional, leading columns, containing the image LID and PDS4 raw image file path, have been pre-pended to each record and the remainder of each record has been modified slightly. Carriage-Return Line-Feed 37 0 483 Image LID 1 1 ASCII_LID 56 The LID for this image cube. File Specification 2 58 ASCII_File_Specification_Name 32 The directory path to the latest version of the associated raw image file. Channel 3 91 ASCII_String 3 The VIMS instrument channel to which this row of metadata applies, IR or VIS. VOLUME_ID 4 96 ASCII_String 11 The PDS3 volume ID provides a unique identifier for a PDS data volume. FILE_SPECIFICATION_NAME 5 110 ASCII_File_Specification_Name 57 The PDS3 file specification name provides the full name of a file, including a path name, relative to the root directory of the PDS volume. TARGET_NAME 6 170 ASCII_String 10 The target name is the name of the body for which the surface geometry parameters in this row of the table are applicable. MINIMUM_PLANETOCENTRIC_LATITUDE 7 182 ASCII_Real 8 deg Planetocentric latitude is the latitude at the surface intercept point on the planet or a specified target body. The planetocentric value is defined by the angle from the body's equator plane to a line defined by a vector from the body center to the body intercept point. Values are positive in the body's northern hemisphere and negative in the southern hemisphere. Note that, for a given surface intercept point on a non-spherical body, the planetocentric latitude is smaller in magnitude than the planetographic latitude. The surface has been modeled as an ellipsoid. Surface intercept points that are obscured by the planet or another moon within the observed field of view are ignored. For observations capturing reflected sunlight (i.e., with wavelengths in the visual or near-infrared), the night side of the target body is also ignored. This column tabulates the minimum value of planetocentric latitude within the field of view of the observation. -999. 90. -90. MAXIMUM_PLANETOCENTRIC_LATITUDE 8 191 ASCII_Real 8 deg Planetocentric latitude is the latitude at the surface intercept point on the planet or a specified target body. The planetocentric value is defined by the angle from the body's equator plane to a line defined by a vector from the body center to the body intercept point. Values are positive in the body's northern hemisphere and negative in the southern hemisphere. Note that, for a given surface intercept point on a non-spherical body, the planetocentric latitude is smaller in magnitude than the planetographic latitude. The surface has been modeled as an ellipsoid. Surface intercept points that are obscured by the planet or another moon within the observed field of view are ignored. For observations capturing reflected sunlight (i.e., with wavelengths in the visual or near-infrared), the night side of the target body is also ignored. This column tabulates the maximum value of planetocentric latitude within the field of view of the observation. -999. 90. -90. MINIMUM_PLANETOGRAPHIC_LATITUDE 9 200 ASCII_Real 8 deg Planetographic latitude is the latitude at the surface intercept point on the planet or a specified target body. The planetographic value is defined by the angle between the body's equator plane and the local surface normal at the body intercept point. Values are positive in the body's northern hemisphere and negative in the southern hemisphere. Note that, for a given surface intercept point on a non-spherical body, the planetographic latitude is larger in magnitude than the planetocentric latitude. The surface has been modeled as an ellipsoid. Surface intercept points that are obscured by the planet or another moon within the observed field of view are ignored. For observations capturing reflected sunlight (i.e., with wavelengths in the visual or near-infrared), the night side of the target body is also ignored. This column tabulates the minimum value of planetographic latitude within the field of view of the observation. -999. 90. -90. MAXIMUM_PLANETOGRAPHIC_LATITUDE 10 209 ASCII_Real 8 deg Planetographic latitude is the latitude at the surface intercept point on the planet or a specified target body. The planetographic value is defined by the angle between the body's equator plane and the local surface normal at the body intercept point. Values are positive in the body's northern hemisphere and negative in the southern hemisphere. Note that, for a given surface intercept point on a non-spherical body, the planetographic latitude is larger in magnitude than the planetocentric latitude. The surface has been modeled as an ellipsoid. Surface intercept points that are obscured by the planet or another moon within the observed field of view are ignored. For observations capturing reflected sunlight (i.e., with wavelengths in the visual or near-infrared), the night side of the target body is also ignored. This column tabulates the maximum value of planetographic latitude within the field of view of the observation. -999. 90. -90. MINIMUM_IAU_LONGITUDE 11 218 ASCII_Real 8 deg IAU longitude is the longitude at the surface intercept point on the planet or a specified target body. Longitudes increase toward the west, in the rotating coordinate frame defined by the IAU. The surface has been modeled as an ellipsoid. Surface intercept points that are obscured by the planet or another moon within the observed field of view are ignored. For observations capturing reflected sunlight (i.e., with wavelengths in the visual or near-infrared), the night side of the target body is also ignored. This column tabulates the minimum value of IAU longitude within the field of view of the observation. For fields of view that cross the prime meridian, the tabulated minimum value will be greater than the maximum. -999. 360. 0. MAXIMUM_IAU_LONGITUDE 12 227 ASCII_Real 8 deg IAU longitude is the longitude at the surface intercept point on the planet or a specified target body. Longitudes increase toward the west, in the rotating coordinate frame defined by the IAU. The surface has been modeled as an ellipsoid. Surface intercept points that are obscured by the planet or another moon within the observed field of view are ignored. For observations capturing reflected sunlight (i.e., with wavelengths in the visual or near-infrared), the night side of the target body is also ignored. This column tabulates the maximum value of IAU longitude within the field of view of the observation. For fields of view that cross the prime meridian, the tabulated minimum value will be greater than the maximum. -999. 360. 0. MINIMUM_LOCAL_HOUR_ANGLE 13 236 ASCII_Real 8 deg Local hour angle is a measure of the local solar time as observed at the surface intercept point on the planet or a specified target body. The value is 180 degrees at a point on the surface as the Sun is crossing the local meridian. Local hour angle can alternatively be understood as a longitude frame that originates at the anti-solar direction and increases toward the east (assuming prograde rotation). The surface has been modeled as an ellipsoid. Surface intercept points that are obscured by the planet or another moon within the observed field of view are ignored. The night side of the target body is not ignored. This column tabulates the minimum value of local hour angle within the field of view of the observation. For fields of view that cross the midnight meridian, the tabulated minimum value will be greater than the maximum. -999. 360. 0. MAXIMUM_LOCAL_HOUR_ANGLE 14 245 ASCII_Real 8 deg Local hour angle is a measure of the local solar time as observed at the surface intercept point on the planet or a specified target body. The value is 180 degrees at a point on the surface as the Sun is crossing the local meridian. Local hour angle can alternatively be understood as a longitude frame that originates at the anti-solar direction and increases toward the east (assuming prograde rotation). The surface has been modeled as an ellipsoid. Surface intercept points that are obscured by the planet or another moon within the observed field of view are ignored. The night side of the target body is not ignored. This column tabulates the maximum value of local hour angle within the field of view of the observation. For fields of view that cross the midnight meridian, the tabulated minimum value will be greater than the maximum. -999. 360. 0. MINIMUM_LONGITUDE_WRT_OBSERVER 15 254 ASCII_Real 8 deg This alternative definition of longitude is measured relative to the direction toward the observer. Values increase westward. Unlike other longitudes, this quantity ranges from -180 to 180 degrees instead of 0 to 360 degrees. The surface has been modeled as an ellipsoid. Surface intercept points that are obscured by the planet or another moon within the observed field of view are ignored. For observations capturing reflected sunlight (i.e., with wavelengths in the visual or near-infrared), the night side of the target body is also ignored. This column tabulates the minimum value of this longitude within the field of view of the observation. -999. 180. -180. MAXIMUM_LONGITUDE_WRT_OBSERVER 16 263 ASCII_Real 8 deg This alternative definition of longitude is measured relative to the direction toward the observer. Values increase westward. Unlike other longitudes, this quantity ranges from -180 to 180 degrees instead of 0 to 360 degrees. The surface has been modeled as an ellipsoid. Surface intercept points that are obscured by the planet or another moon within the observed field of view are ignored. For observations capturing reflected sunlight (i.e., with wavelengths in the visual or near-infrared), the night side of the target body is also ignored. This column tabulates the maximum value of this longitude within the field of view of the observation. -999. 180. -180. MINIMUM_FINEST_SURFACE_RESOLUTION 17 272 ASCII_Real 10 km Finest surface resolution is the shorter dimension of a pixel as projected onto the surface at the intercept point. In practice, it defines the approximate size of the smallest linear feature that can be resolved if that feature is oriented optimally on the surface. The surface has been modeled as an ellipsoid. Surface intercept points that are obscured by the planet or another moon within the observed field of view are ignored. For observations capturing reflected sunlight (i.e., with wavelengths in the visual or near-infrared), the night side of the target body is also ignored. This column tabulates the minimum value of finest surface resolution within the field of view of the observation. In other words, this is the size of the smallest resolvable feature in the field of view. -999. MAXIMUM_FINEST_SURFACE_RESOLUTION 18 283 ASCII_Real 10 km Finest surface resolution is the shorter dimension of a pixel as projected onto the surface at the intercept point. In practice, it defines the approximate size of the smallest linear feature that can be resolved if that feature is oriented optimally on the surface. The surface has been modeled as an ellipsoid. Surface intercept points that are obscured by the planet or another moon within the observed field of view are ignored. For observations capturing reflected sunlight (i.e., with wavelengths in the visual or near-infrared), the night side of the target body is also ignored. This column tabulates the maximum value of finest surface resolution within the field of view of the observation. In other words, this is the smallest resolvable feature that could be resolved anywhere in the field of view provided that feature is oriented optimally on the surface. -999. MINIMUM_COARSEST_SURFACE_RESOLUTION 19 294 ASCII_Real 10 km Coarsest surface resolution is the longer dimension of a pixel as projected onto the surface at the intercept point. At any given intercept point, the coarsest surface resolution is typically larger than the finest resolution by a factor of 1/cos(emission angle). In practice, this defines the approximate size of a linear feature that can be resolved if that feature has its worst possible orientation on the surface. The surface has been modeled as an ellipsoid. Surface intercept points that are obscured by the planet or another moon within the observed field of view are ignored. For observations capturing reflected sunlight (i.e., with wavelengths in the visual or near-infrared), the night side of the target body is also ignored. This column tabulates the minimum value of coarsest surface resolution within the field of view of the observation. In other words, this is the size of the smallest feature that could be be resolved somewhere within the field of view, even if its orientation on the surface is the worst it can be. -999. MAXIMUM_COARSEST_SURFACE_RESOLUTION 20 305 ASCII_Real 10 km Coarsest surface resolution is the longer dimension of a pixel as projected onto the surface at the intercept point. At any given intercept point, the coarsest surface resolution is typically larger than the finest resolution by a factor of 1/cos(emission angle). In practice, this defines the approximate size of a linear feature that can be resolved if that feature has its worst possible orientation on the surface. The surface has been modeled as an ellipsoid. Surface intercept points that are obscured by the planet or another moon within the observed field of view are ignored. For observations capturing reflected sunlight (i.e., with wavelengths in the visual or near-infrared), the night side of the target body is also ignored. This column tabulates the maximum value of coarsest surface resolution within the field of view of the observation. In other words, this is the size of the smallest feature that could be be resolved anywhere in the field of view and regardless of its orientation on the surface. -999. MINIMUM_SURFACE_DISTANCE 21 316 ASCII_Real 12 km Surface distance is the separation between the observer and the point where a line of sight intercepts the surface of the planet or a specified target body. The surface has been modeled as an ellipsoid. Surface intercept points that are obscured by the planet or another moon within the observed field of view are ignored. For observations capturing reflected sunlight (i.e., with wavelengths in the visual or near-infrared), the night side of the target body is also ignored. This column tabulates the minimum value of surface distance within the field of view of the observation. -999. MAXIMUM_SURFACE_DISTANCE 22 329 ASCII_Real 12 km Surface distance is the separation between the observer and the point where a line of sight intercepts the surface of the planet or a specified target body. The surface has been modeled as an ellipsoid. Surface intercept points that are obscured by the planet or another moon within the observed field of view are ignored. For observations capturing reflected sunlight (i.e., with wavelengths in the visual or near-infrared), the night side of the target body is also ignored. This column tabulates the maximum value of surface distance within the field of view of the observation. -999. MINIMUM_PHASE_ANGLE 23 342 ASCII_Real 8 deg Phase angle is the angle, measured at the surface intercept point, between the direction of the incoming photon from the Sun and the direction of the outgoing photon to the observer. The surface has been modeled as an ellipsoid. Surface intercept points that are obscured by the planet or another moon within the observed field of view are ignored. The night side of the target body is not ignored. This column tabulates the minimum value of phase angle within the field of view of the observation. -999. 180. 0. MAXIMUM_PHASE_ANGLE 24 351 ASCII_Real 8 deg Phase angle is the angle, measured at the surface intercept point, between the direction of the incoming photon from the Sun and the direction of the outgoing photon to the observer. The surface has been modeled as an ellipsoid. Surface intercept points that are obscured by the planet or another moon within the observed field of view are ignored. The night side of the target body is not ignored. This column tabulates the maximum value of phase angle within the field of view of the observation. -999. 180. 0. MINIMUM_INCIDENCE_ANGLE 25 360 ASCII_Real 8 deg Incidence angle is the angle, measured at the surface intercept point, between the local surface normal vector and the direction of the incoming photon from the Sun. The surface has been modeled as an ellipsoid. Surface intercept points that are obscured by the planet or another moon within the observed field of view are ignored. The night side of the target body is not ignored; here the incidence angle is > 90 degrees. This column tabulates the minimum value of incidence angle within the field of view of the observation. -999. 180. 0. MAXIMUM_INCIDENCE_ANGLE 26 369 ASCII_Real 8 deg Incidence angle is the angle, measured at the surface intercept point, between the local surface normal vector and the direction of the incoming photon from the Sun. The surface has been modeled as an ellipsoid. Surface intercept points that are obscured by the planet or another moon within the observed field of view are ignored. The night side of the target body is not ignored; here the incidence angle is > 90 degrees. This column tabulates the maximum value of incidence angle within the field of view of the observation. -999. 180. 0. MINIMUM_EMISSION_ANGLE 27 378 ASCII_Real 8 deg Emission angle is the angle, measured at the surface intercept point, between the local surface normal vector and the direction of the outgoing photon to the observer. The surface has been modeled as an ellipsoid. Surface intercept points that are obscured by the planet or another moon within the observed field of view are ignored. The night side of the target body is not ignored. This column tabulates the minimum value of emission angle within the field of view of the observation. -999. 90. 0. MAXIMUM_EMISSION_ANGLE 28 387 ASCII_Real 8 deg Emission angle is the angle, measured at the surface intercept point, between the local surface normal vector and the direction of the outgoing photon to the observer. The surface has been modeled as an ellipsoid. Surface intercept points that are obscured by the planet or another moon within the observed field of view are ignored. The night side of the target body is not ignored. This column tabulates the maximum value of emission angle within the field of view of the observation. -999. 90. 0. SUB_SOLAR_PLANETOCENTRIC_LATITUDE 29 396 ASCII_Real 8 deg Planetocentric latitude of the sub-solar point on the surface of the planet or specified target body. The planetocentric value is defined by the angle from the body's equator plane to a line defined by a vector from the body center to the sub-solar point. Values are positive in the body's northern hemisphere and negative in the southern hemisphere. This value is defined by the instantaneous geometry at the time of the observation; it is independent of the field of view. -999. 90. -90. SUB_SOLAR_PLANETOGRAPHIC_LATITUDE 30 405 ASCII_Real 8 deg Planetographic latitude of the sub-solar point on the surface of the planet or specified target body. The planetographic value is defined by the angle between the body's equator plane and the local surface normal at the sub-solar point. Values are positive in the body's northern hemisphere and negative in the southern hemisphere. This value is defined by the instantaneous geometry at the time of the observation; it is independent of the field of view. -999. 90. -90. SUB_OBSERVER_PLANETOCENTRIC_LATITUDE 31 414 ASCII_Real 8 deg Planetocentric latitude of the sub-observer point on the surface of the planet or specified target body. The planetocentric value is defined by the angle from the body's equator plane to a line defined by a vector from the body center to the sub-observer point. Values are positive in the body's northern hemisphere and negative in the southern hemisphere. This value is defined by the instantaneous geometry at the time of the observation; it is independent of the field of view. -999. 90. -90. SUB_OBSERVER_PLANETOGRAPHIC_LATITUDE 32 423 ASCII_Real 8 deg Planetographic latitude of the sub-observer point on the surface of the planet or specified target body. The planetographic value is defined by the angle between the body's equator plane and the local surface normal at the sub-observer point. Values are positive in the body's northern hemisphere and negative in the southern hemisphere. This value is defined by the instantaneous geometry at the time of the observation; it is independent of the field of view. -999. 90. -90. SUB_SOLAR_IAU_LONGITUDE 33 432 ASCII_Real 8 deg Longitude of the sub-solar point on the surface of the planet or specified target body. Longitudes increase toward the west from the IAU-defined prime meridian. This value is defined by the instantaneous geometry at the time of the observation; it is independent of the field of view. -999. 360. 0. SUB_OBSERVER_IAU_LONGITUDE 34 441 ASCII_Real 8 deg Longitude of the sub-observer point on the surface of the planet or specified target body. Longitudes increase toward the west from the IAU-defined prime meridian. This value is defined by the instantaneous geometry at the time of the observation; it is independent of the field of view. -999. 360. 0. CENTER_RESOLUTION 35 450 ASCII_Real 10 km The linear size of a pixel as projected at the distance of the planet or specified target body. This value is defined by the instantaneous geometry at the time of the observation; it is independent of the field of view. -999. CENTER_DISTANCE 36 461 ASCII_Real 12 km Distance from the observer to the center of the planet or a specified target body. This value is defined by the instantaneous geometry at the time of the observation; it is independent of the field of view. -999. CENTER_PHASE_ANGLE 37 474 ASCII_Real 8 deg Phase angle at the center of the planet or specified target body. This is the angle between the local direction of in incoming photon from the Sun and the local direction of an outgoing photon to the observer. This value is defined by the instantaneous geometry at the time of the observation; it is independent of the field of view. -999. 180. 0.