Probes
2015-04-07 14:30:29.0 [mpmorahan] insert AltLabel (id: null text: Axial Double Probe language code: en); insert Definition (id: null text: MMS carries two sets of doubleprobe instruments. Each measures the voltage between two electrodes to determine the electric field. As the field changes are quite small, the electrodes must be set as widely apart as possible to provide a robust signal. Thus the double probes sensors reside at the ends of very long booms that deploy away from the main body of each observatory after they are launched. The Spin-plane Double Probe, or SDP, consists of four 200-foot wire booms with spherical sensors at the end. These booms stick out of the sides of the observatories. The Axial Double Probe, or ADP, is aligned through the center of each observatory, along its spin axis. It is made of two 30-foot antennas. The ADP is controlled via a separate electronics box, called the Axial Electronic Box or AEB. Gathering accurate measurements while each spacecraft spins around is no small feat and the accuracy of the probes is continually checked and calibrated against measurements made by EDI. The SDP is the product of a collaboration between the University of New Hampshire, the Royal Institute of Technology in Sweden, and the University of Colorado in Boulder. The ADP was provided by the University of Colorado. language code: en);
MMS ADP
MMS carries two sets of doubleprobe instruments. Each measures the voltage between two electrodes to determine the electric field. As the field changes are quite small, the electrodes must be set as widely apart as possible to provide a robust signal. Thus the double probes sensors reside at the ends of very long booms that deploy away from the main body of each observatory after they are launched. The Spin-plane Double Probe, or SDP, consists of four 200-foot wire booms with spherical sensors at the end. These booms stick out of the sides of the observatories. The Axial Double Probe, or ADP, is aligned through the center of each observatory, along its spin axis. It is made of two 30-foot antennas. The ADP is controlled via a separate electronics box, called the Axial Electronic Box or AEB. Gathering accurate measurements while each spacecraft spins around is no small feat and the accuracy of the probes is continually checked and calibrated against measurements made by EDI. The SDP is the product of a collaboration between the University of New Hampshire, the Royal Institute of Technology in Sweden, and the University of Colorado in Boulder. The ADP was provided by the University of Colorado.