Design criteria for radar tracking systems Final report
Theoretical aspects of radar tracking problem and design criteria for radar tracking systems
Salwen, H. C.↗
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Digital-data transition tracking loops.
Data transition tracking in digital communication systems by decision directed phase tracking loops
Anderson, T. O.↗
Rate and predictability in rate-tracking tasks.
Target displacement and track coherence in pursuit tracking tasks experiments for human performance studies
Fowler, F.↗
Tracking and data acquisition for space exploration.
Tracking and data acquisition systems for spacecraft and ground link through command, telemetry and tracking, noting data relay satellites, etc
Coates, R. J.↗
On the identification of observable orbit parameters, with application to lunar orbiter tracking.
Orbit parameters identification method based on given tracking data span applied to lunar orbiter tracking using Fourier analysis
Pfeiffer, C. G.↗
Wide-range tracking oscillator generates phase and frequency coherent output
Tracking oscillator consists of modified phase-lock loop which controls voltage-controlled oscillator capable of automatic lock-on and track of periodic input waveform over frequency ratio 500-1. It is used in telemetry and communications systems where large signal fluctuations are encountered.
Howard, J. R.↗
The ATS-F/Nimbus-E Tracking and Data Relay Experiment
Tracking and data relay satellite system performance by ATS and Nimbus spacecraft for range and range rate tracking and command and data transmission
Heffernan, P. J.↗
Tracking receiver Patent
Design and development of tracking receiver for tracking satellites and receiving radio signal transmissions under adverse noise conditions
Glomb, W. L.↗
Optical tracking mount Patent
Tracking mount for laser telescope employed in tracking large rockets and space vehicles to give information regarding azimuth and elevation
Beehm, J. M.↗
Calibration of plastic track detectors for use in cosmic ray experiments
Plastic track detectors calibration for heavy charged particles in cosmic ray experiments, considering track etching rates as function of particle charge and velocity
Blanford, G. E., Jr.↗
Solar particle tracks in glass from the Surveyor 3 spacecraft
Solar particle tracks in clear filter glass from Surveyor 3 spacecraft, comparing with lunar rocks track results
Crozaz, G.↗
The evolution of the Kapoeta howardite based on fossil track studies
Gas rich Kapoeta howardite composition, evolution, high particle fossil track densities and normal track rich crystals spatial relations
Lal, D.↗
Tracking variations in the alpha activity in an electroencephalogram
The problem of tracking Alpha voltage variations in an electroencephalogram is discussed. This problem is important in encephalographic studies of sleep and effects of different stimuli on the brain. Very often the Alpha voltage is tracked by passing the EEG signal through a bandpass filter centered at the Alpha frequency, which hopefully will filter out unwanted noise from the Alpha activity. Some alternative digital techniques are suggested and their performance is compared with the standard technique. These digital techniques can be used in an environment where an electroencephalograph is interfaced with a small digital computer via an A/D convertor. They have the advantage that statistical statements about their variability can sometimes be made so that the effect sought can be assessed correctly in the presence of random fluctuations.
Prabhu, K. S.↗
The use of the Earth-Moon system as a radio tracking facility
The use of the earth-moon system for radio tracking has several potentially useful aspects, from a scientific standpoint: extension of the baseline by two orders of magnitude, absence of lunar atmosphere, higher-velocity parallax with a longer period, and the moon's more modellable rotation. The facility would be a convenient base station for other research, not directly involving the tracking capability, but utilizing its orbiting data link features.
Mulholland, J. D.↗
Use of the Doppler technique to track free roaming animals from satellites
The application of the Doppler effect to track wild animals is discussed, with artificial satellites used to provide wide range coverage. The limitations of radiotelemetry for the purpose of tracking animals are presented. The advantages of the artificial satellite, with specific reference to the Nimbus satellite, are examined.
Maxwell, J. C.↗
Tracking radar studies of bird migration
The application of tracking radar for determining the flight paths of migratory birds is discussed. The effects produced by various meteorological parameters are described. Samples of radar scope presentations obtained during tracking studies are presented. The characteristics of the radars and their limitations are examined.
Williams, T. C.↗
Solar particle tracks in glass from Surveyor 3
Samples of glass from the Surveyor 3 TV camera filter were examined for particle tracks by optical and scanning electron microscopy. The corrected density value is 1.7 million + or - 0.1 million tracks/sq cm, and the track density vs depth curve is determined. Comparisons with other estimated and calculated data are discussed, and lack of agreement between data sets is considered. It is felt that considerable erosion occurs, and that erosion also occurs by a flaking of small thicknesses of material, possibly caused by solar wind irradiation.
Crozaz, G.↗
Operating executive for the DSIF tracking subsystem software
The advanced engineering model of the DSIF tracking subsystem (DTS) is being developed by the Deep Space Instrumentation Facility. The DTS will provide effective and reliable tracking and data acquisition support for the complex planetary and interplanetary space flight missions planned for the 1970's. The nucleus of the subsystem is a Honeywell H832 digital computer. The design and capabilities of the real-time operating executive software are described.
Poulson, P. L.↗