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Giotto carried ten scientific instruments. They included:

  • a narrow-angle, multicolour camera to obtain pictures of the nucleus
  • three mass spectrometers to measure gas and dust composition
  • a dust impact detector to measure the mass of dust particles striking the shield
  • two plasma experiments to study the solar wind and charged particles
  • an energetic particles analyser to study electrons, protons and alpha-particles
  • a magnetometer to study changes in the magnetic field
  • an optical probe to study brightness of the coma
  • a radio science experiment to investigate the electron environment was also carried out by comparing signals sent at different frequencies from the spacecraft

Experiment or instrument

Principal investigator


MAG: Magnetometer

F.M. Neubauer

University of Cologne, Germany

HMC: Halley Multicolour Camera

H.U. Keller

MPI, Lindau, Germany

DID: Dust Impact Detection System

J.A.M. McDonnell

University of Kent, Canterbury, UK

RPA: Rème Plasma Analyser

H. Rème

CESR, Toulouse, France

JPA: Johnstone Plasma Analyser

A. Johnstone

Mullard Space Science Laboratory, Holmbury St Mary, UK

PIA: Particulate Impact Analyser

J. Kissel

MPI, Heidelberg, Germany

OPE: Optical Probe Experiment

A. C. Levasseur-Regourd

CNRS, Verrières-le-Buisson, France

EPA: Energetic Particles

S.M.P. McKenna-Lawlor

St. Patrick's College, Maynooth, Ireland

NMS: Neutral Mass Spectrometer

D. Krankowsky

MPI, Heidelberg, Germany

IMS: Ion Mass Spectrometer

H. Balsiger

University of Bern, Switzerland

GRE: Giotto Radio Experiment

P. Edenhofer

Ruhr University, Bochum, Germany


Last Update: 1 September 2019
29-Feb-2024 05:44 UT

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