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<title>Design and performance of the GOES-8 high-resolution magnetometer</title>

1996; SPIE; Volume: 2812; Linguagem: Inglês

10.1117/12.254084

1996-756X

Warren D. Dunham, Steven A. Macintyre, Charles R. Upton,

Geomagnetism and Paleomagnetism Studies

The GOES-8 magnetometer is one of the most sophisticated and highest performance fluxgate magnetometers to ge flown in space. Its 16-bit analog-to-digital converter (ADC) can resolve magnetic field strengths as low as 0.03 nT. It can measure fields to an accuracy of 1 nT over a temperature range of -80 degrees C to 72 degrees C. This paper describes the GOES-8 magnetometer design and performance. The magnetometer consists of a very low noise three-axis analog magnetometer, a high resolution dual slope integrating ADC, and a redundant digital serial spacecraft interface. Another feature of the magnetometer is its ability to generate a calibration sequence upon command. The 16-bit ADC design was the most challenging. There were no 16-bit grade 1 ADCs on the market at the time (1986), so it was necessary to design the ADC using the limited number of grade 1 parts that were available.