Engineering topics
Publications and source records attributed to Holdridge, D. B..
Radar observations of Toro were made with a (one-dimensional) resolution of 0.005 arc sec. When radar and optical data are combined, they suggest an irregular rocky surface slightly smoothed by a mantle of loose material.
The Jet Propulsion Laboratory has developed a set of computer programs known as the Solar System Data Processing System (SSDPS) which is employed in improving the ephemerides of the major planets and for improving the values of several associated astronomical constants. A group of solutions for the masses of the major planets, together with the AU and radii of Mercury, Venus, and Mars, is presented. These solutions based upon optical, radar, and spacecraft radio tracking data are preliminary. The relative power of radar and radio tracking data vis-a-vis purely optical data in a solution is shown. The problems which could arise by adopting solutions based upon a single data type are demonstrated.
Lunar ephemeris for nanosecond resolution laser ranging systems by literal and numerical integration techniques
Data from radar range and Doppler observations of Venus at inferior conjunction
Space trajectories Program studies the motion of a space probe confined to the solar system and influenced by the nonspherical Earth and Moon, and the point masses defined by the Sun, Venus, Mars, and Jupiter. It is written in the FORTRAN Assembly Program language.
Space trajectories program for IBM 7090 computer