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Results for “anomalies”

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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At least 1,495 records · Page 83

All sources NASA NTRS DOE OSTI

NASA NTRS1966

Thermal anomalies in membrane properties

Anomalities in water and aqueous systems, and temperature effects on membranes

Drost-Hansen, W.↗

NASA NTRS1968

Magnetic chart of the Brazilian anomaly

Geomagnetic field minimum in southern Brazil, comparing satellites data maps

Cain, J. C.↗

NASA NTRS1968

Magnetic chart of the Brazilian anomaly - A verification.

Geomagnetic field minimum in southern Brazil, comparing satellites data maps

Cain, J. C.↗

NASA NTRS1969

The Apollo project manager, anomalies and ambiguities

Problems of Apollo project managers in decision making and production engineering

Cicero, J. P.↗

NASA NTRS1969

Coordinated rocket measurements on the D-region winter anomaly. I - Experimental results.

Simultaneous rocket measurements of D region temperatures and electron densities on anomalous winter day

Mechtly, E. A.↗

NASA NTRS1970

First Order Pertubations of an Orbit by a Mass Anomaly

First order short and long perturbations of lunar satellite orbit by mascon

Smith, D. E.↗

NASA NTRS1970

A comparison of simultaneous phase and amplitude fluctuations imposed on satellite signals by F-region anomalies

Amplitude and phase variations of high frequency satellite signals transmitted through ionosphere F region

Porter, J. W.↗

NASA NTRS1970

The diurnal phase anomaly in the upper atmospheric density and temperature

Upper atmospheric density and temperature diurnal phase and amplitude discrepancy reconciled by dynamic diffusion model

Chandra, S.↗

NASA NTRS1970

Ar40 anomaly in lunar samples from Apollo 11

Surface correlation of excess Ar 40 in lunar fines from Apollo 11

Heymann, D.↗

NASA NTRSDate not supplied

Contrasting Regional Carbon Cycle Responses to Seasonal Climate Anomalies Across the East‐West Divide of Temperate North America

Explore the source record for details and available documents.

B. Byrne↗

NASA NTRS1970

Apollo 13 Mission: Cryogenic Oxygen Tank 2 Anomaly Report

There were two investigative aspects associated with the loss of the cryogenic oxygen tank pressure during the Apollo 13 flight. First, what was the cause of the flight failure of cryogenic oxygen tank 2. Second, what possible contributing factors during the ground history of the tank could have led to the ultimate failure in flight. The first flight indication of a problem occurred when the quantity measurement in the tank went full scale about 9 hours before the incident. This condition in itself could not have contributed to ignition in the tank, since the energy in the circuit is restricted to about 7 milli-joules. Data from the electrical system provided the second indication of a problem when the fans in tank 2 were activated to reduce any stratification which might have been present in the supercritical oxygen in the tank. Several short-circuits were detected and have been isolated to the fan circuits of tank 2. The first short-circuit could have contained as much as 160 joules of energy, which is within the current-protection level of the fan circuits. Tests have shown that two orders of magnitude less energy than this is sufficient to ignite the polytetrafluoroethylene insulation on the fan circuits in the tank. Consequently, the evidence indicates that the insulation on the fan wiring was ignited by the energy in the short-circuit.

Source record↗

NASA NTRS1970