Radar reflectivity plots - Digital method.
Digital method to produce radar reflectivity from analog audio frequency Doppler data extracted from terrain echo signal of CW scatterometer radar
Oherren, D. H.↗
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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Radar measurements of Martian topography.
Martian topography during rotation observed using radar round trip echo delay at 7840 MHz, discussing dark areas relation to elevation
Counselman, C. C.↗
Evaluation of satellite materials by use of ground-based photometric observations, phase 2
Data reduction and analysis of Pageos 1 and Echo 1 observations for evaluating satellite materials by ground based photometry
Emmons, R. H.↗
The work at Christchurch, New Zealand
Meteor trail measurements taken in New Zealand and Australia by radar echoes and application to wind measurement
Ellyett, C. D.↗
Mercury - Surface features observed during radar studies
Mercury surface features from spectrograms of depolarized radar echoes
Goldstein, R. M.↗
Radar maps of the moon at 70-cm wavelength and their interpretation
Polarized and depolarized radar maps of moon, attributing anomalies and average diffuse component of echoes to scattering behavior of surface and subsurface rocks
Campbell, M. J.↗
CAT at a subsidence inversion - A case study
CAT at subsidence inversion in presence of strong wind shear, noting radar echo pattern as Kelvin-Helmholtz instability indicator
Boucher, R. J.↗
Sequence of diffuse plasma resonances observed on Alouette 2 ionograms
Diffuse plasma resonance sequence observed on Alouette 2 ionograms, showing pattern similar to spread echo
Oya, H.↗
Exploitation of ionospheric Faraday rotation to perform radar astronomical polarization measurements
Radar astronomical polarization measurements for lunar echoes by exploiting ionospheric Faraday rotation with linearly polarized antenna
Burns, A. A.↗
Fastener load analysis method Final report, 28 Jan. 1970 - Apr. 1971
Ultrasonic, pulse echo interferometric method for analyzing bolt preloads
Rollins, F. R., Jr.↗
BOMEX bulletin, no. 10
Radiosonde and radar echo measurements on area of air/sea interactions over tropical ocean surface with numerical weather forecasting
Source record↗
Lidar observations in relation to the atmospheric winds aloft
Lidar observations of visually clear troposphere compared with simultaneous rawinsonde data for relationship between lidar echoes and atmospheric winds aloft
Collis, R. T. H.↗
Ultrasonic measurement of thin layers
Pulse echo ultrasonic measurement of thin film layer between thick media, using real time computation
Lees, S.↗
Map of lunar radar reflectivity at 7.5-m wavelength
Lunar radar reflectivity mapping at 7.5 m wavelength for maria and highlands echo powers, using interferometric techniques
Thompson, T. W.↗
Functional dependences of bistatic-radar frequency spectra and cross sections on surface scattering laws
Bistatic radar frequency spectra and cross sections dependence on surface scattering laws, studying echo bandwidth
Ingalls, D. H. H.↗
Anomalous ultrasonic attenuation in pure superconducting Nb
Anomalous ultrasonic attenuation in pure superconducting Nb from pulse echo amplitude measurements
Daniel, A. C.↗
Improved ultrasonic biomedical measuring apparatus
Device for making measurements of organs in living specimens and recording movements of organs is described. System uses series of ultrasonic pulses beamed into body of animal and reflected echo pulses are picked up by transducers and recorded. Diagram of equipment required and method of application is included.
Lee, R. D.↗
Ionospheric nf sub H resonances: Frequency shifts versus plasma conditions
The Alouette 2 resonances observed near the harmonics of the electron cyclotron frequency f sub H reveal frequency shifts (relative to the n(f sub H) values derived from model field calculations) which can be interpreted in terms of plasma wave dispersion effects. These effects are observed on the 2(f sub H) resonance when it is near the resonance observed close to the upper hybrid frequency f sub T. The observations suggest that an oblique echo model may be required to give a proper interpretation of the 2(f sub H) resonance. Cyclotron damping can be ignored only when the angle between the propagation vector and the direction perpendicular to the earth's magnetic field B is less than a few degrees for the 2(f sub H) wave, and less than a few tenths of a degree for the n(f sub H) waves with n 2. The negative offset of the absolute value of B inferred from the plasma resonance observations is consistent with expectations based on recent OGO 3 and OGO 5 rubidium magnetometer observations at higher altitudes in the equatorial regions.
Benson, R. F.↗