41,871 to 41,880 of 41,958 Results
Jan 1, 1993
Xu, C.; Helou, G., 1993, "IRAS Colors Within M31; Evidence for Deficiency of Very Small Grains?", https://hdl.handle.net/2014/36609, The Astrophysical Journal, JPL Open Repository
Significant differences are found in the IRAS color-color diagrams of small regions within the disk of M31 compared to Galactic cirrus, most noticeably demonstrated by a trend of low surface brightness ratio. |
Jan 1, 1993
Martonchik, J. V., 1993, "Retrieval of Surface Directional Reflectance and Hemispherical Albedo Using Multi-angle Measurements, I. Ground Level Observations", https://hdl.handle.net/2014/36612, UNKNOWN, JPL Open Repository
Knowledge of the directional reflectance properties of natural surfaces such as soils and vegetation canopies is essential for classification studies and canopy model inversions. Atmospheric correction schemes, using various levels of approximation, are described to retrieve surf... |
Jan 1, 1993
Giorgini, J.; Wong, S.; You, T-H., 1993, "Navigating the Magellan Aerobrake", https://hdl.handle.net/2014/36613, UNKNOWN, JPL Open Repository
The Magellan spacecraft has been aerobraked into a 197 x 541 km near-circular orbit around Venus from which it is conducting a high-resolution gravity mapping mission. This was the first interplanetary aerobrake maneuver and involved flying the spacecraft through the upper reache... |
Jan 1, 1993
Meehan, Thomas K.; Lindqwister, Ulf J., 1993, "One Millimeter Horizontal Precision Over a 41 Km Baseline Using P-Codeless Data", https://hdl.handle.net/2014/36615, UNKNOWN, JPL Open Repository
High accuracy geodetic solutions at the few ppb level have become fairly standard with data from a global network of P-code Global Positioning System (GPS) receivers. Used as a measurement tool, it has numerous scientific applications including the monitoring of crustal motion, v... |
Jan 1, 1993
Farr, T.; Evans, D.; Zebker, H.; Harding, D.; Bufton, J.; Dixon, T.; Vetrella, S.; Gesch, D., 1993, "The Global Topography Mission", https://hdl.handle.net/2014/36627, UNKNOWN, JPL Open Repository
An accurate description of the surface elevation of the Earth is of fundamental importance to many branches of Earth science. A number of working groups have considered the characteristics of the available digital topographic data base and found that there are significant deficie... |
Jan 1, 1993
Feynman, J.; Ruzmikin, A., 1993, "Distributions of the Interplanetary Magnetic Field Revisite", https://hdl.handle.net/2014/36626, UNKNOWN, JPL Open Repository
The adequacy of the power spectrum to characterize the variations of a parameter depends on whether or not the parameter has a Gaussian distribution. We here perform very simple tests of Gaussianit on the distributions of the magnitudes of the interplanetary magnetic field, and o... |
Jan 1, 1993
Knudsen, P., 1993, "Global Low Harmonic Degree Models of the Seasonal Variability and Residual Ocean Tides from TOPEX/Poseidon Altimeter Data", https://hdl.handle.net/2014/36641, Journal of Geophysical Research, JPL Open Repository
The large scale seasonal variability is estimated jointly with the mean sea surface and the ocean tide signal not recovered by the Cartwright and Ray ocean tide model. |
Jan 1, 1993
Spencer, David A.; Salama, Ahmed H., 1993, "Computation and Application of the TOPEX/Poseidon Orbit Event File", https://hdl.handle.net/2014/34781, Victoria, B.C., Canada, JPL Open Repository
During TOPEX/POSEIDON, mission design process, the need was identified for sofware capabl of generating a predicted set or orbitala events for use in view period scheduling planning. |
Jan 1, 1993
Carrere, V.; Conel, J. E., 1993, "Recovery of Atmospheric Water Vapor Total Column Abundance from Imaging Spectrometer Data Around 940 nm - Sensitivity Analysis and Application to Airborne Visible/Infrared Imaging Spectrometer (AVIRIS)", https://hdl.handle.net/2014/34998, n/a, JPL Open Repository
Twosimple techniques to retrieve path precipitable water fromthe Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) high spectral resolution radiance data (Continuum Interpolated Band Ratio, CIBR, and Narrow/Wide Ratio, N/W), using the 940 nm water absorption band, are compa... |
Jan 1, 1993
Lopes-Gautier, R., 1993, "Extra Terrestrial Lava Flows", https://hdl.handle.net/2014/35005, London, England, JPL Open Repository
Volcanism has been one of the major processes shaping the surfaces of the terrestrial planets. Lava flows have been identified on the Moon, Mars, Venus, and on Juptier's moon Io. The study of extra-terrestrial lavas has largely relied on the interpretation of remotely acquired im... |