A dataset provided by the European Space Agency

Mission GIOTTO
URL ftp://npsa01.esac.esa.int/pub/mirror/GIOTTO/NMS/GIO-C-NMS-4-HALLEY-V1.0
DOI https://doi.org/10.5270/esa-jn7m16q
Abstract Derived, calibrated density profiles from the NMS ION and NEUTRAL sensors flown on the GIOTTO mission and obtained during the comet Halley fly-by on 13 March 1986. This data set corrects issues found in the GIO-C-NMS-4-86P-V1.0 data set.
Description Data set Overview = On March, 13/14 1986, the Giotto spacecraft flew within 600 km from comet Halley through the coma. During this flyby the Neutral Mass Spectrometer NMS measured the neutral gas and the ionized plasma of the comet as a function of distance. The present data represent the curren- tly available dataset of the innermost coma. Not all masses are calib- rated and evaluated to the same degree of accuracy. Therefore, care has to be taken when using these data. The paragraph summarizing the correlated errors should be carefully read before working with these data. There are no data available for other periods of the mission. This data set supersedes GIO-C-NMS-4-86P-V1.0. Version History The first version of the this data set was archived as GIO-C-NMS-4-86P-V1.0. After an internal and external review by the Planetary Data System (PDS) Small Bodies Node (SBN), several technical issues were discovered. First, this data set was renamed to GIO-C-NMS-4-HALLEY-V1.0 since this is a data set for comet 1P/Halley, not 86P/Wild. All catalog files have been updated. Support files have been populated, updated, and/or corrected to comply with PDS3 standards. The data files have remained unchanged, though the format files that describe them have been corrected as needed. Content of archive - Neutral density data from the mass analyzer - Neutral density data from the energy-analyzer - Ion density data from the mass analyzer - Neutral gas velocity data - Ion temperature data - Yields for different ions for the NMS detectors - Data for mass 18, 28 and 31 for the mass analyzer which have been published in the literature - Data for mass 18 and 44 for the energy analyzer which have been published in the literature - List of references - PhD work of R. Meier and M. Reber, University of Bern Data structure -------------- Product Column 1 Column 2 Column 3 Column 4 ------- -----...
Instrument NMS
Temporal Coverage 1986-03-13T23:08:00Z/1986-03-14T00:03:11Z
Version V1.0
Mission Description Mission Overview In 1978,ESA was invited by NASA to plan a joint mission consisting of a comet Halley fly-by in November 1985 and a rendezvous with comet Tempel 2 in 1988. The mission comprised an American main spacecraft which would carry a European probe. The main spacecraft, with its array of sophisticated cameras and experiments, would complete a fly-by of comet Halley at a safe distance. Shortly before fly-by, the probe would be released towards the nucleus to make detailed in-situ observations in the innermost coma. In January 1980, however, it became clear that financial support for the Halley Fly-by/Tempel 2 Rendezvous mission could not be secured in the USA. By that time the interest of European scientists had built up such momentum that ESA considered the possibility of a purely European mission. The support for a fly-by mission was strong in Europe and went far beyond the small section of scientists specialised in cometary research. A fly-by of comet Halley was suggested to ESA by the scientific community in February 1980. Rather than having the American spacecraft deliver the probe to the comet as in the earlier concept, the Europeans proposed that the capabilities of the small probe be increased by building an independent, self-sufficient spacecraft to be launched using the European Ariane rocket. The limited time available for development and the small financial resources made it advisable to use a spin-stabilised spacecraft derived from the European Earth orbiting spacecraft Geos. This proposal was studied by ESA in the first half of 1980. The European mission to comet Halley was named Giotto after the Italian painter Giotto di Bondone who depicted comet Halley as the `Star of Bethlehem' in one of his frescoes in the Scrovegni chapel in Padua in 1304. The Giotto mission was finally approved as ESA's first interplanetary mission on 7 July 1980. An Announcement of Opportunity was issued ...
Date Published 2006-10-30
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2006-10-30, GIO-C-NMS-4-HALLEY, V1.0. https://doi.org/10.5270/esa-jn7m16q