Following the Ulysses launch on October 6, 1990, the covers of the HISCALE instrument were deployed on 3 November, and the instrument was turned on for operation on 14 November, 1990. Operation since turn-on has been nominal, with all elements of the instrument system performing as designed, tested, and calibrated.

• 5.1 Backgrounds (Tappin document, 1994)
  • 5.1.1 Introduction
  • 5.1.2 Method
  • 5.1.3 Summary
• 5.2 Cover Close Calibrations (Maclennan & Armstrong,1995)
  • 5.2.1 Introduction
  • 5.2.2 Typical Signatures
  • 5.2.3 PHA Analysis
  • 5.2.4 MFSA Analysis
  • 5.2.5 Cover Close/Open Timings
  • 5.2.6 Helium Over the Solar Poles
• 5.3 In-Flight Calibration Sources
• 5.4 Determination of HISCALE MFSA Background Rates Using IMP-8 Monitored Omnidirectional Galactic Cosmic Rays (Patterson & Armstrong, 2001) (PDF document)
• 5.5 Technical White Paper for the Ulysses HISCALE Background Rate Software (Patterson & Armstrong, 2001) (PDF document)