Analog to digital conversion of tv data for a mars mission.
Analog-to-digital encoding system for slow-scan video data processing on Mars spacecraft
SPACECRAFT INSTRUMENTATION↗
SEARCH · Engineering Papers
Results for “Encoding”
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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Coded noncoherent communications.
Binary digits encoding into orthogonal signals with white Gaussian noise for noncoherent communications over Rician channel
DIGITAL COMMUNICATIONS SYSTEM↗
Analog-digital conversion of tv data on mariner 4.
Analog-digital conversion of TV video data on Mariner IV, noting ground loop effect on encoding
VIDEO DATA↗
The Telemetry System
Design and operation of signal conditioner, telemetry encoder and transmitter, and antenna for Relay I telemetry system
RELAY I SATELLITE↗
Data compression and its application to video signals
Data compression or source encoding reduce transmission rates for television pictures - study based on T
SIGNAL ENCODING↗
Information content of a q-level m-sequence with the restriction that the sum be n
Information content of q-level m-sequences restricted to sums of n - analysis of enumeration, encoding, and decoding problems
INFORMATION PROCESSING↗
A study of high-speed AD and DA converters using redundancy techniques Interim report, May 10, 1963 - May 9, 1964
High speed analog-to-digital converters compared using redundancy encoding techniques
ANALOG-TO-DIGITAL CONVERTER↗
Optimization of Design of Space Experiments from the Standpoint of Data Processing Semiannual Report, May 1 - Oct. 31, 1966
Encoding algorithm for processing data from space experiments
ENCODING↗
Conference on Adaptive Telemetry
Adaptive telemetry conference on adaptive data control and processing, prediction, data compression, encoding, decoding, and modulation.
TELEMETRY↗
A study of data compression buffering
Data compression system using buffer memory for rate interfacing, and analyses of redundancy encoding
DATA COMPRESSOR↗
Applications of a combined counter/shift register module
Design concept of combined counter/shift register module and applications as spacecraft telemetry encoders and logarithmic data compressor
SPACECRAFT COMMUNICATION↗
Scientific mission support for extended lunar exploration. Volume 6, appendix C - Computer program Final report
Data handling and encoding procedures and computer program for extended lunar exploration mission support
COMPUTER PROGRAM↗
Sequence time coding for data compression.
Pathcount and coding matrices for sequence time encoding and decoding for data compression
ENCODING↗
Orthogonal tree codes for communication in the presence of white Gaussian noise.
Convolutional encoder for orthogonal tree codes in presence of white Gaussian noise
ENCODER↗
Multiple Turbo Codes
A description is given of multiple turbo codes and a suitable decoder structure derived from an approximation to the maximum a posteriori probability (MAP) decision rule, which is substantially different from the decoder for two-code-based encoders.
multiple turbo codes encoders↗
Genetic Inventory Task Final Report
Contaminant terrestrial microbiota could profoundly impact the scientific integrity of extraterrestrial life-detection experiments. It is therefore important to know what organisms persist on spacecraft surfaces so that their presence can be eliminated or discriminated from authentic extraterrestrial biosignatures. Although there is a growing understanding of the biodiversity associated with spacecraft and cleanroom surfaces, it remains challenging to assess the risk of these microbes confounding life-detection or sample-return experiments. A key challenge is to provide a comprehensive inventory of microbes present on spacecraft surfaces. To assess the phylogenetic breadth of microorganisms on spacecraft and associated surfaces, the Genetic Inventory team used three technologies: conventional cloning techniques, PhyloChip DNA microarrays, and 454 tag-encoded pyrosequencing, together with a methodology to systematically collect, process, and archive nucleic acids. These three analysis methods yielded considerably different results: Traditional approaches provided the least comprehensive assessment of microbial diversity, while PhyloChip and pyrosequencing illuminated more diverse microbial populations. The overall results stress the importance of selecting sample collection and processing approaches based on the desired target and required level of detection. The DNA archive generated in this study can be made available to future researchers as genetic-inventory-oriented technologies further mature.
microbial diversity↗
A BOOLEAN-FUNCTION-MULTIPLEXED TELEMETRY SYSTEM
Insertion of encoded data into a boolean function at the transmitter in order to achieve an efficient multiplexed telemetry system
TELEMETRY↗
Command and telemetry systems
The command and telemetry portions of the Telstar system provide necessary support functions for the basic communications experiment and the radiation experiment. By means of the command system, the states of 9 magnetic latching relays in the satellite are controlled from the ground. Commands are sent to the satellite by coded signals modulated on a carrier in the VHF band. The telemetry system also uses a VHF carrier to transmit encoded information from the satellite. Data on 112 items are provided once each minute. This paper discusses the over-all command and telemetry systems and considers the general objectives, system aspects and detailed implementation.
TELEMETRY↗