Helical recorder
Tape recorder, using metallic tape, has a minimum of moving parts and no belts. It permits long-term bulk storage in extreme environments, and has less weight and bulk than present recording equipment.
Cole, P. T.↗
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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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Radio frequency baseband recording technique
Technique uses a helical-scan video recorder with auxiliary signal-conditioning equipment to provide an inexpensive, high-capacity magnetic tape recording of a 112 channel, phase-locked, multiplexed, baseband signal.
Heckman, D. C.↗
Testing device for verifying the performance of digital recorders
Test device, consisting of a pulse generator section and a manual program section, checks and calibrates digital recorder-printers. It is adaptable to other recorder configurations.
Wilson, W. C.↗
Optically activated magnetic recording tape
Optically activated data storage medium visually and electromagnetically reproduces a recorded signal. In an electric field, particles in heat-fluidized thermoplastic layer form a visible image of the recorded signal. Refluidizing the thermoplastic layer erases the signals. Very high data packing densities are achieved.
Marks, A. M.↗
Ground recording and playback system Final report, Jul. 1968 - Dec. 1969
Ground recording and playback system using data handling units and color film recorder for generating photographic images on film from ATS spin scan camera data
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Automatic reference level control for an antenna pattern recording system
Automatic gain control system keeps recorder reference levels within 0.2 decibels during operation. System reduces recorder drift during antenna radiation distribution determinations over an eight hour period.
Lipin, R., Jr.↗
Event recorder Patent
Event recorder with constant speed motor which rotates recording disk
Fox, W. E.↗
Technique minimizes the effects of dropouts on telemetry records
Recorder deficiencies are minimized by using two-channel system to prepare two tapes, each having noise, wow and flutter, and dropout characteristics of channel on which it was made. Processing tapes by computer and combining signals from two channels produce single tape free of dropouts caused by recording process.
Anderson, T. O.↗
Very high speed direct-readout, control and recording system
Characteristics of electronic system for high speed readout, control, and recording of data are discussed. Operation of system is described to show rate of data processing and accuracy obtainable. Primary advantage of system is providing direct recording of parameter value several times per second.
Turner, J. W.↗
Design study for multi-channel tape recorder system, volume 2
Skew test data are presented on a tape recorder transport with a double capstan drive for a 100 KHz tone recorded on five tracks simultaneously. Phase detectors were used to measure the skew when the center channel was the 100 KHz reference.
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Erase-mode recording characteristics of photochromic CaF2, SrTiO3, and CaTiO3 crystals.
Erase-mode optical recording characteristics of photochromic crystal wafers of CaF2:La,Na; CaF2:Ce,Na; SrTiO3:Ni,Mo,Al; and CaTiO3:Ni,Mo have been measured. An argon laser operating at 5145 A was used for both optical recording and optical readout. Sensitometric curves of optical-density change versus logarithm of exposure are shown for a number of erase-beam intensities between 0.2 mW/sq cm and 2 W/sq cm. In this range, time-intensity reciprocity holds for the CaF2 materials but fails for the titanates, particularly at low intensities. The dependences of sensitivity, gamma, and maximum transmission contrast ratio on wafer thickness and material are discussed. Wafers of SrTiO3, CaTiO3, and CaF2 exhibiting approximately equal maximum contrast ratios have relative sensitivities approximately in the ratio 5:2:1, respectively, at an erase intensity of 1 W/sq cm.
Duncan, R. C., Jr.↗
An improved holographic recording medium
Solid, linear chain hydrocarbons with molecular weight ranging from about 300 to 2000 can serve as long-lived recording medium in optical memory system. Suitable recording hydrocarbons include microcrystalline waxes and low molecular weight polymers or ethylene.
Gange, R. A.↗
Bipotential monitoring with inexpensive office-type cassette recorders
Low-cost, modified cassette is part of system that accepts biomedical data for storage. System accepts wide range of data and is compactly packaged for portability. Standard office recorder with automatic level control, multiple inputs, radio, and battery operation may be used for recording stage.
Wilbur, R. L.↗
Hologram recording tubes
Optical memories allow extremely large numbers of bits to be stored and recalled in a matter of microseconds. Two recording tubes, similar to conventional image-converting tubes, but having a soft-glass surface on which hologram is recorded, do not degrade under repeated hologram read/write cycles.
Rajchman, J. H.↗
On-film optical recording of camera lens settings
An apparatus is described for recording a representation of the camera lens aperture and focus setting on the film of a camera, while the photographic image is being recorded. A data lens is provided between the camera lens and film, by means of which the aperture and focus setting may be determined. The determination is made by measuring both the location and the size of a data image provided by the data lens. The data lens apparatus requires no electrical power, is low in weight, and does not result in an increase in the external dimensions of the camera.
Thompson, R. E.↗
High-data-rate, spacecraft tape recorders.
Description of magnetic head designs, tape transport features, encoding techniques, bit error rates, and data rate capabilities of tape recorders used on board satellites for temporary storage of sensor data. Helical- and transverse-scan rotary head mechanisms used for wideband video signals from imaging systems are explained along with associated electronic circuitry. Decoding and decision procedures employed in multiple-track recorders are outlined, and deskewing electronics are discussed.
Thompson, C. R.↗
Effect of flutter on theoretical bit error rates for digital recording systems.
Tape recorders employed to record and eventually reproduce digital data introduce errors into the data. It is desirable to understand the sources of these errors so that predictions may be made of the resultant error rate. While specific predictions are difficult to apply to whole classes of machines and their respective electronic systems, it is possible to make general predictions which give insight into the problems and processes involved. A heuristic viewpoint is developed for understanding the problems involved in machines and systems that now exist.
Byers, R. A.↗
Mariner 9 infrared interferometer spectrometer (IRIS) reduced data records documentation
The Mariner 9 spacecraft was successfully inserted into orbit around Mars. One of the five instruments on board, an infrared interferometer spectrometer is used to record the thermal emission spectrum of Mars between 200 and 2000 cm/1. The spatial resolution for vertical viewing is a circular area of approximately 110 km diameter for a periapsis height of 1400 km. The total number of calibrated spectra included in the final data set is 21167. The final calibrated thermal emission spectra contained in the reduced data records are reported.
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