In this G-Z dataset, observations from channels E1 to E5 (table below) are included since cometary ions were not detected in the higher energy channels. For each of these channels, particle counts are accumulated in eight azimuthal sectors of 45 deg. width in each telescope. The sectors are numbered from 1 to 8 anticlockwise when viewed from above the ecliptic, with Sector 1 centered on the sun- Earth line, i.e. it views in the sunward direction and detects ions streaming away from the Sun. At Giacobini-Zinner, a complete 3- dimensional distribution function was obtained at 32 s intervals during the main encounter phase, changing to 64 s at greater distances e.g. after 1830 UT on 12 September outbound.

The data are presented as the values of the density and temperature of the electrons measured (radio mapping) during the tail crossing of comet Giacobini-Zinner by ISEE-3/ICE as derived from spectroscopy of the thermal noise spectrum. The data was provided to the National Space Science Data Center (NASA/GSFC) by the Principal Investigator of the Radio Mapping Experiment on ISEE-3/ICE, Dr. Jean-Louis Steinberg of the Observatoire de Paris, Meudon, France cover the time interval 10:00 - 12:00 UT on September 11, 1985. The time resolution is 54 seconds.

The data are presented as the values of the density and temperature of the electrons measured (radio mapping) during the tail crossing of comet Giacobini-Zinner by ISEE-3/ICE as derived from spectroscopy of the thermal noise spectrum. The data was provided to the National Space Science Data Center (NASA/GSFC) by the Principal Investigator of the Radio Mapping Experiment on ISEE-3/ICE, Dr. Jean-Louis Steinberg of the Observatoire de Paris, Meudon, France cover the time interval 10:00 - 12:00 UT on September 11, 1985. The time resolution is 54 seconds.

Mass spectrometric measurements of ions in the coma of comet Giacobini-Zinner made during the encounter of the International Cometary Explorer (ICE) on 11 September 1985, when the spacecraft passed within 7800 km of the nucleus on its antisunward side.

These data were obtained from the LANL plasma experiment on ICE (Principal Investigator: S.J. Bame assistance from K. Sofaly and S. Kedge). The instrument measures the 2-D electron distribution function in one spacecraft rotation (3 s) once every 24 s, by obtaining 16 evenly spaced energy spectra, each with 15 contiguous levels covering the energy range 8.5 eV to 1140 eV. From these 2-D distributions the density, velocity, and temperature of the electrons are then derived. A 2-D temperature matrix is calculated which is subsequently diagonalized. Then nominally the maximum temperature corresponds to the parallel temperature and the minimum temperature corresponds to the perpendicular temperature. This is done independently of the magnetic field measurements however, the direction of maximum temperature determined in this manner is usually found to be within 15 degrees of the magnetic field direction inferred from the magnetometer measurements. The time resolution is 24 sec from the start of Day 253 (September 10) until Day 255 (September 12), 18:38. At that time the bit rate dropped from 1024 to 512 bps, and the nominal time resolution went to 48 sec.

IUE Long-Wavelength Redundant (LWR) observations of comets

IUE Long-Wavelength Redundant (LWR) observations of comets

Energetic particle observations made with the ULECA sensor on the International Cometary Explorer encounter with comet Giacobini-Zinner in Sept, 1985.

Energetic particle observations made with the ULECA sensor on the International Cometary Explorer encounter with comet Giacobini-Zinner in Sept, 1985.

This data set contains spectral observations of 37 comets obtained with the Short-wavelength prime (SWP) spectrograph on the International Ultraviolet Explorer (IUE) satellite. Both low dispersion data from 1150-1975 A and high dispersion data from 1145-1930A (with partial coverage from 1930-2198A) are included.