STAFF/DWP, search coil magnetometer waveparticle experiment

The STAFF/DWP wave experiment onboard the TanCe1 (TC1) satellite of the Double Star Program (DSP) consists of a three axial search coil magnetometer, three preamplifiers, a Magnetic Wave Form unit (MWF), a power supply and a Digital Wave Processor. The three first elements are spares of the Cluster STAFF experiment and the power supply is a spare of the Cluster Wave Experiment Consortium (WEC), all provided by LPP (CNRS) and the Digital Wave Processor, based on the Cluster DWP experiment, provided by the University of Sheffield. The three-axis search coil magnetometer aims to measure magnetic fluctuations in the frequency range 0.1 Hz to 4 kHz. The three mutually orthogonal sensors are mounted on a rigid boom that should have deployed away from the spacecraft body. Unfortunately, the STAFF antenna boom failed to deploy, which means interference from the spacecraft systems is very high. Even so, useful measurements can still be made. Two sensors lie in the spin plane and the third one is parallel to the spacecraft spin axis. The Magnetic Wave Form data are routinely provided in the frequency range 0.1 to 10 Hz.The Digital Wave Processor on TC1 is derived from the Cluster DWP. As on Cluster it performs onboard MWF data compression, handles all telemetry and commanding for STAFF, and calculates the autocorrelations of electron counts received from PEACE. DWP contains a particle correlator experiment which computes the autocorrelation of electron counts received by the PEACE HEEA sensor via an interexperiment link. In addition to Cluster, DWP calculates onboard the spectral matrix of the three magnetic wave data in the frequency range 10Hz 4kHz (which is on cluster performed by the STAFF Spectrum Analyser, STAFF SA). All STAFF-DWP datasets are available on the ESA Cluster Science Archive at https://csa.esac.esa.int/ PEACE key scientific datasets for TC-1Dataset ID Dataset content D1_CP_STA-DWP_PSD Power Spectral Density (1s resolution) D1_CP_STA-DWP_COR_FX DWP Particle Correlator Fixed Energy Data D1_CP_STA-DWP_COR_ST DWP Particle Correlator Stepped Energy Data D1_CP_STA-DWP_COR_TS DWP Particle Correlator Time Series Data