Report of the IAU/IAG/COSPAR working group on cartographic coordinates and rotational elements of the planets and satellites: 1988

Eros: Shape, Topography, and Slope Processes

“…Results are given and mapped in body-fixed latitude and west longitudes, using the expression in Table I to define the prime meridian (see Davies et al 1994). Maps are presented with west longitude as geographical coordinates projected on a spherical reference surface to conform to previous map usage for planets, satellites, and asteroids (Davies et al 1994, International The relative potential energy at the surface (geopotential number) divided by an appropriate gravitational acceleration gives the dynamic height (Vanicek and Krakiwsky 1986).…”

Shape, Mean Radius, Gravity Field, and Interior Structure of Callisto

“…The image coordinates are corrected to coordinates in kilometers at the target satellite by means of navigation data for the spacecraft position, and camera focal length and distortion . With the inclusion of an adjustment for camera pointing, the ellipsoidal shape can be e Latitude and west longitude (deg) of the sub-spacecraft point in Callistofixed IAU coordinate system (Davies et al 1996). determined by matching the limb coordinates to those predicted for triaxial ellipsoids. We solve for the shape in two ways.…”

“…• W, where altitude is referred to a sphere of radius 2410.3 km, and latitude and longitude are defined by international convention (Davies et al 1996). The Earth-spacecraft line of sight was 90…”

Jupiter's Cloud Structure as Constrained by Galileo Probe and HST Observations

“…The precise pointing of the camera for each image was determined by finding the center of Jupiter using fits to Jupiter's limb profile, as defined initially by maximum gradient detections, then subsequently refined by rejecting deviant points and refitting. We then used Davies et al (1992) 1-bar values for Jupiter's equatorial and polar radii (71,492 ± 4 km and 66,854 ± 10 km) and the range and the sub-Earth point determined from SPICE toolkit routines and ephemerides (Acton 1996) to define the transformation between image coordinates to planetary coordinates of planetocentric latitude and longitude (using a System III rotation period of 9h55.5m).…”