Space vehicle sa-4, telemetry system
Telemetry system for space vehicle of Saturn I /SA-4/ launch vehicle - performance evaluation
SATURN I /SA-4/ LAUNCH VEHICLE↗
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Narrowband, crystal-controlled biomedical telemetry system
Telemetry system utilizing miniature, single-channel, crystal-controlled transmitter is described suitable for biomedical applications. Receiver used in conjunction with transmitter is narrowband superheterodyne FM receiver with crystal control in both conversion stages.
Westbrook, R. M.↗
Studies of circadian cycles in human subjects during prolonged isolation in a constant environment using eight-channel telemetry systems
Telemetry monitored physiological data of human circadian cycles during prolonged isolation
Clagg, B. R.↗
Telemetry system
The means of telemetering digital data from a spacecraft to the Deep Space Network is addressed. Phase shift keying and uncoded quadriphase shift keying modulations are discussed along with demodulation and decoding systems. Telemetry system losses and noisy reference performance for suppressed carrier receivers are also examined.
Yuen, J. H.↗
Numerical data frame readout system used in testing telemetry systems
Digital telemetry systems are treated by a display system that offers direct readout as high data rates. The rates appear in numerical format and are adaptable to photographic recording techniques. The system can show bit dropouts at a memory output or locate a malfunction in a system.
Cote, C. E.↗
The impact of NRZ data asymmetry on the performance of a space telemetry system
The telemetry data asymmetry due to rising and falling voltage transitions can cause undesired spectral components at the output of a spacecraft transmitter. The performance of a space telemetry system can potentially degrade because of these undesired components. Here, an expression is derived for the power spectral density of an asymmetric nonreturn-to-zero (NRZ) data stream. This formula is then used to investigate how the data bandwidth varies with data asymmetry. At the receiver end, the threshold levels of undesired spectral components that fall into the carrier-tracking-loop bandwidth are determined by examining the derived spectral density. Further, based on this formula, a simple technique is developed for the computation of bit signal-to-noise ratio (SNR) degradation due to data asymmetry. The telemetry bit SNR degradations derived using this technique are compared with results obtained previously and with measurements by the Electronic Systems Test Laboratory (ESTL) at the Lyndon B. Johnson Space Center.
Nguyen, T. M.↗
Multichannel implantable telemetry system
Multichannel telemetry system is used for chronic implantation in animals to monitor a variety of physiological parameters. A hermetically sealed unit, the system uses a time-sharing multiplex scheme to commutate between various sensor inputs and enables the number of channels to be increased or decreased.
Fryer, T. B.↗
New passive telemetry system
Passive telemetry system enables the monitoring of vital biological functions from living organisms, without external connections or power sources. The FM system, using a phase locked loop technique, keeps the information frequency and powering frequencies separate.
Visscher, J.↗
A multichannel implantable telemetry system.
Multichannel telemetry system for chronic implantation in animals to monitor physiological parameters
Datnow, B.↗
Eight-channel telephone telemetry system
Portable telemetry system uses conventional telephone link which eliminates mailing or messenger service between physician and analyst. Transmitter is used by physician; receiver is used by analyst. Each unit is inductively coupled to its respective telephone set, transmitter converting EEG into audio frequency and receiver converting this frequency back to EEG.
Smith, R.↗
Design, fabrication, test and flight of bbrc type spc 300 solar pointing controls and bbrc type tel 200 telemetry systems final report
Design, fabrication, testing, and flight of solar orientation control system and telemetry system for Aerobee rocket instrumentation
CONTROL SYSTEM↗
Digital telemetry system Patent
Digital telemetry system apparatus to reduce tape recorder wow and flutter noise during playback
Feinberg, P. M.↗
Accelerometer telemetry system
An accelerometer telemetry system incorporated in a finger ring is used for monitoring the motor responses of a subject. The system includes an accelerometer, battery, and transmitter and provides information to a remote receiver regarding hand movements of a subject wearing the ring, without the constraints of wires. Possible applications include the detection of fatigue from the hand movements of the wearer.
Konigsberg, E.↗
A multichannel physiological data/voice telemetry system
A seven channel physiological telemetry system was designed, constructed, and tested for a space environment to transfer physiological and voice information to and from an astronaut. Three ECG leads were monitored simultaneously, and two-way voice communication was achieved. The portable unit operated properly under ground based station (GBS) control. The major design problem was associated with the constraints of a wide bandwidth FM transmitter with crystal control combined with the tri-state logic format used. However, by using an ''indirect FM'' scheme and incorporating additional waveshaping circuits at the GBS, proper operation of the system was obtained. In the present form, the telemetry system has capability for seven channels of low level (2.5 mv peak maximum) physiological signals with bandwidths between 0.03 Hz and 100 Hz. Additional signal conditioning and modification of the instrumentation amplifier gains are required for other signals.
Portnoy, W. M.↗
Mission telemetry system monitor: A real-time knowledge-based system
The Galileo Mission Telemetry System (MTS) has a cluster of computer subsystems configured as a star network. The MTS handles the real-time processing of spacecraft telemetry and ground monitor data. Large volumes of status and fault messages are generated as a result of changes in the system environment. These messages are triggered by the conditions that exist on any one particular subsystem or device. The order of message generation is in time sequence and does not always correlate to the function sequence of active processes. A significant number of messages provide context with varying degrees of uncertainty. As such, highly skilled telemetry controllers are required to regularly go through high volumes of messages generated by the MTS to identify, diagnose, and isolate faults. A knowledge-based system prototype is being developed to monitor the Galileo Mission Telemetry System performance. The system design approach features temporal reasoning, uncertainty management, and intelligent graphic user interfaces.
Mouneimne, Samih A.↗
An adaptable spacecraft telemetry system.
Centralized Flexible Automatic Computer Telemetry System /FACTS/ for spacecraft, providing capability of revising sampling structure
SAMPLED DATA SYSTEM↗
THE SATURN TELEMETRY SYSTEM
Description of the telemetry systems for the saturn rocket, including the automatic prelaunch monitoring and checkout system
SATURN LAUNCH VEHICLE↗
A three channel telemetry system
A three channel telemetry system intended for biomedical applications is described. The transmitter is implemented in a single chip using a 2 micron BiCMOS processes. The operation of the system and the test results from the latest chip are discussed. One channel is always dedicated to temperature measurement while the other two channels are generic. The generic channels carry information from transducers that are interfaced to the system through on-chip general purpose operational amplifiers. The generic channels have different bandwidths: one from dc to 250 Hz and the other from dc to 1300 Hz. Each generic channel modulates a current controlled oscillator to produce a frequency modulated signal. The two frequency modulated signals are summed and used to amplitude modulate the temperature signal which acts as a carrier. A near-field inductive link telemeters the combined signals over a short distance. The chip operates on a supply voltage anywhere from 2.5 to 3.6 Volts and draws less than 1 mA when transmitting a signal. The chip can be incorporated into ingestible, implantable and other configurations. The device can free the patient from tethered data collection systems and reduces the possibility of infection from subcutaneous leads. Data telemetry can increase patient comfort leading to a greater acceptance of monitoring.
Lesho, Jeffery C.↗