Papers by Steven macintyre
IEEE Transactions on Magnetics, Sep 1, 1980
The design of a three-axis search coil magnetometer is described which has noise characteristics ... more The design of a three-axis search coil magnetometer is described which has noise characteristics that are close to or better than comparable superconductor magnetometers over the 20Hz to 2000Hz range. The sensor coils and electronic conditioning equipment weighs less than 14Kg and can be transported by one person in a 46cm x 46cm x 15cm instrumentation case. The sensing elements consist of three concentric circular coils. The coil signals are processed to provide two outputs: one proportional to frequency, one independent of frequency. Laboratory tests verified that predicted and actual performance agreed quite closely. I. GENERAL DESCRIPTION OF THE MAGNETOMETER The magnetometer which is pictured in Fig. 1 consists of three loop antennas with integrated preamplifiers and a separate electronics conditioning unit.
CRC Press eBooks, Feb 26, 1999
Sensor Review, Feb 1, 1991
The magnetic field generated or disturbed by an object is often overlooked when we need to inspec... more The magnetic field generated or disturbed by an object is often overlooked when we need to inspect or detect it. In this tutorial Steve Macintyre describes the fundamental design principles of a range of magnetic field sensors.
Electric and Hybrid Vehicle Technology International
Sensor Review, 1991
The magnetic field generated or disturbed by an object is often overlooked when we need to inspec... more The magnetic field generated or disturbed by an object is often overlooked when we need to inspect or detect it. In this tutorial Steve Macintyre describes the fundamental design principles of a range of magnetic field sensors.
GOES-8 and Beyond, 1996
The GOES-8 magnetometer is one of the most sophisticated and highest performance fluxgate magneto... more 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.
Space Science Reviews, 2019
Since their inception in the 1970s, the NOAA Geostationary Operational Environmental Satellite (G... more Since their inception in the 1970s, the NOAA Geostationary Operational Environmental Satellite (GOES) system has monitored the sources of space weather on the sun and the effects of space weather at Earth. These observations are important for providing forecasts, warnings and alerts to many customers, including satellite operators, the power utilities, and NASA's human activities in space. The GOES magnetometer provides observations of the geomagnetic field, which can be the first indication that significant space weather has reached Earth. In addition, the magnetic field observations are used to identify and forecast the severity of the space weather activity. This paper reviews the capabilities of the GOES-16 magnetometer (MAG) and presents initial post-launch calibration/validation results including issues found in the data. The GOES-16 MAG requirements and capabilities are similar to those for previously flown instruments, measuring three components of the geomagnetic field but with an improved sampling rate of 10 samples/second. The MAG data are low-pass filtered with a 2.5 Hz cutoff compared to the 0.5 Hz cutoff of previous GOES magnetometers. The MAG is composed of two magnetometers, an inboard (closer to spacecraft bus) and outboard (on tip of boom) magnetometer. Presented are the science and instrument requirements, ground and initial on-orbit instrument calibration and data validation. The on-orbit analysis found magnetic contamination along with temperature de-B T.M. Loto'aniu
Electromagnetic, Optical, Radiation, Chemical, and Biomedical Measurement, 2014
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Papers by Steven macintyre