Engineering topics
Publications and source records attributed to Lundquist, C. A..
The Apollo-Suyuz Test Project (ASTP), to be conducted jointly in 1975 by the United States and the Soviet Union, will carry a multipurpose electric furnace rather similar to that carried on the Skylab. This furnace facility will be used to process samples for seven experiments to investigate how crystals grow and molten materials solidify under near-zero-gravity conditions. An outline of the program is given.
Problems associated with using an altimetry sampling function approach to the geoid are examined. They include: (1) conventent mathematical representation of short-wavelength (eventually approximately 1 deg) features of the geoid or geopotential, (2) utilization of detailed data from only part of the globe (i.e., the oceans) (3) application of appropriate formalism to relate the sea-level equipotential below the atmospheric mass to the external potential above the atmosphere, (4) mathematical applicability of an adopted geopotential representation on the surface of the physical geoid.
The celescope instrumentation and data analysis system is described, the major problems encountered during orbital operation are summerized, and a few major problems that were anticipated but did not materialize are listed.
Satellite-to-ocean altitudes measured to meter accuracy eventually can yield a geoid representation with significant short-wavelength structure over ocean areas. To cope conveniently with this expected detail, one suggested analytical technique would represent the geopotential or the geoid as an expansion in sampling functions that are linear combinations of spherical harmonics. Each of the sampling functions makes its principal contribution to the geopotential in a single geographical region. For a representation truncated after degree N, there are (N + 1) squared such functions associated with a like number of points distributed nearly regularly on the globe. The features of this geopotential representation can be illustrated by considering the case N = 22, for which an expansion in sampling functions can be produced that is equivalent to the geopotential of the 1969 Smithsonian standard earth.
Satellite data techniques and instrumentation in earth geometry and kinetics, reviewing geopotential models, pole positions, tides, ocean physics and international cooperation
GEOS-C satellite project for geodetic and earth physics research
Application of space techniques to solid earth and ocean physics
Spacecraft tracking methods applied to solid earth and ocean physics
Baker-Nunn photometry from Apollo tracking utilizing photographs for brightness, dynamics and duration of rocket exhausts and venting clouds
Possible geopotential improvement from satellite altimetry
Gravity field determination computer program for Standard Earth calculation
Pulsed ruby laser satellite tracking system
Geopotential surface measurement of ocean using altimeter data
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Geodetic satellite photography, tracking, orbit calculations, and related studies for 1967
Geos 1 observations and other geodetic satellite studies by Smithsonian Astrophysical Observatory
Satellite experiment design for atmospheric density and near-free molecule flow aerodynamics
Station Cartesian coordinates in SAO systems using Geos 1