Real Time Data Compression for Rae-B Spacecraft Camera
dc.contributor.author | Miller, W. H. | |
dc.date.accessioned | 2016-05-14T00:45:28Z | en |
dc.date.available | 2016-05-14T00:45:28Z | en |
dc.date.issued | 1975-10 | en |
dc.identifier.issn | 0884-5123 | en |
dc.identifier.issn | 0074-9079 | en |
dc.identifier.uri | http://hdl.handle.net/10150/609355 | en |
dc.description | International Telemetering Conference Proceedings / October 14-16, 1975 / Sheraton Inn, Silver Spring, Maryland | en_US |
dc.description.abstract | A real time data compression unit was designed and fabricated for the Radio Astronomv Explorer Lunar Mission Antenna Aspect Camera. The camera takes a panoramic view of spacecraft, moon, etc. of ±35 degrees by 360 degrees. This data compressor combined information reduction and redundancy reduction. The information reduction was accomplished by subsampling (used every fourth line): and the redundancy reduction was accomplished by an adaptive run-length encoder. The adaptive run-length encoder used a zero-order predictor. Two different maximum run-lengths were used with two different data formats. Selection of the operating format depended on the sampled gray level compared to a fixed threshold. Statistical data and images indicate that the redundancy reduction technique yields a compression ratio of 8:1. Thus a combined compression ratio of 32:1 was obtained on an entire panoramic view. | |
dc.description.sponsorship | International Foundation for Telemetering | en |
dc.language.iso | en_US | en |
dc.publisher | International Foundation for Telemetering | en |
dc.relation.url | http://www.telemetry.org/ | en |
dc.rights | Copyright © International Foundation for Telemetering | en |
dc.rights.uri | http://rightsstatements.org/vocab/InC/1.0/ | |
dc.title | Real Time Data Compression for Rae-B Spacecraft Camera | en_US |
dc.type | text | en |
dc.type | Proceedings | en |
dc.contributor.department | NASA-Goddard Space Flight Center | en |
dc.identifier.journal | International Telemetering Conference Proceedings | en |
dc.description.collectioninformation | Proceedings from the International Telemetering Conference are made available by the International Foundation for Telemetering and the University of Arizona Libraries. Visit http://www.telemetry.org/index.php/contact-us if you have questions about items in this collection. | en |
refterms.dateFOA | 2018-09-11T10:25:43Z | |
html.description.abstract | A real time data compression unit was designed and fabricated for the Radio Astronomv Explorer Lunar Mission Antenna Aspect Camera. The camera takes a panoramic view of spacecraft, moon, etc. of ±35 degrees by 360 degrees. This data compressor combined information reduction and redundancy reduction. The information reduction was accomplished by subsampling (used every fourth line): and the redundancy reduction was accomplished by an adaptive run-length encoder. The adaptive run-length encoder used a zero-order predictor. Two different maximum run-lengths were used with two different data formats. Selection of the operating format depended on the sampled gray level compared to a fixed threshold. Statistical data and images indicate that the redundancy reduction technique yields a compression ratio of 8:1. Thus a combined compression ratio of 32:1 was obtained on an entire panoramic view. |