This dataset contains the results obtained from the Dust Impact Detection System (DIDSY) flown aboard the GIOTTO spacecraft during its extended mission to Comet P/Grigg-Skjellerup in 1992. The measurements and analysis of the three impacts detected during close approach are contained in text files. Calibration tables for the sensors are included in this dataset. These data have not been reviewed or formally archived with the PDS.

This dataset contains count rates from the Energetic Particle Analyser (EPA) experiment aboard the Giotto spacecraft during its flyby of comet P/Grigg-Skjellerup during July of 1992. These data were not formally reviewed by the PDS.

This dataset contains count rates from the Energetic Particle Analyser (EPA) experiment aboard the Giotto spacecraft during its flyby of comet P/Grigg-Skjellerup during July of 1992. These data were not formally reviewed by the PDS.

This data set contains combined and correlated results from the Johnstone Particle Analyser (JPA) and magnetometer experiments flown aboard the Giotto spacecraft during its extended mision to fly by comet P/Grigg-Skjellerup. These data have not been formally reviewed.

This dataset includes raw and calibrated results from the Optical Probe Experiment (OPE) aboard the Giotto spacecraft during its extended mission to comet 26P/Grigg-Skjellerup, as well as the data used in the calibration.

This dataset includes raw and calibrated results from the Optical Probe Experiment (OPE) aboard the Giotto spacecraft during its extended mission to comet 26P/Grigg-Skjellerup, as well as the data used in the calibration.

Dust Impact Detection System (DIDSY) consists of six independent subsystems with the primary aim of registering the impacts of all particulates of significant mass incident on the probe during the post-perihelion encounter with Comet Halley in 1986. Mounted on Giotto's front dust shield, the detectors will determine the mass spectrum of the dust, with a limiting sensitivity of some 10^^-17^^ g, increasing to the largest grain masses encountered along Giotto's trajectory through the cometary environment with an ultimate spatial resolution of some 70 km. An additional detector is located on the rear shield to monitor those dust particles (m > ~ 5 X 10^^-7^^ g) that are able to penetrate the front dust shield. An ambient plasma monitor is also incorporated into DIDSY to measure the inJpact plasma generated by both dust and gas impacts on the spacecraft. The system is controlled and its data processed by a microprocessor-based system that allows the wide range of anticipated impact rates (varying from a few per minute, to ~ 10^6 s^^-1^^ at closest approach) to be handled. The instrument weighs 2.26 kg and consumes 1.9 W of power during normal operation.

Dust Impact Detection System (DIDSY) consists of six independent subsystems with the primary aim of registering the impacts of all particulates of significant mass incident on the probe during the post-perihelion encounter with Comet Halley in 1986. Mounted on Giotto's front dust shield, the detectors will determine the mass spectrum of the dust, with a limiting sensitivity of some 10^^-17^^ g, increasing to the largest grain masses encountered along Giotto's trajectory through the cometary environment with an ultimate spatial resolution of some 70 km. An additional detector is located on the rear shield to monitor those dust particles (m > ~ 5 X 10^^-7^^ g) that are able to penetrate the front dust shield. An ambient plasma monitor is also incorporated into DIDSY to measure the inJpact plasma generated by both dust and gas impacts on the spacecraft. The system is controlled and its data processed by a microprocessor-based system that allows the wide range of anticipated impact rates (varying from a few per minute, to ~ 10^6 s^^-1^^ at closest approach) to be handled. The instrument weighs 2.26 kg and consumes 1.9 W of power during normal operation.

This data set contains the results for the Implanted Ion Sensor (IIS) of the Johnstone Particle Analyser (JPA) instrument flown aboard the GIOTTO spacecraft during its extended mission to fly by comet P/Grigg-Skjellerup. The IIS instrument produced data in three modes during the encountered, labelled as 'D4D', 'STC' and 'TOF'. The files in this data set present the results obtained in those modes in the form of flat ASCII files.

This data set contains the results for the Implanted Ion Sensor (IIS) of the Johnstone Particle Analyser (JPA) instrument flown aboard the GIOTTO spacecraft during its extended mission to fly by comet P/Grigg-Skjellerup. The IIS instrument produced data in three modes during the encountered, labelled as 'D4D', 'STC' and 'TOF'. The files in this data set present the results obtained in those modes in the form of flat ASCII files.