LBC Wave Data


The LBC data is in CDF format. Each of the CDF files have the same Variables:

Epoch - Time in cdfepoch of the measurement
BwCHORUS - LBC Wave intensity (nT)
L - L shell at the time of measurement (RE)
MLAT - Magnetic Latitude at the time of measurement (deg)
MLT - Magnetic Local Time at the time of measurement (hours)
Kp - 10 * Kp index at the time of measurement 
Dst - Dst index at the time of measurement (nT)
AE - AE index at the time of measurement (nT)


The LBC Data is from:

Cluster - all spacecraft (C1, C2, C3, and C4)

DoubleStar

THEMIS - Spacecraft A (tha), D (thd), and E (the)


The LBC data is from the search coil magnetometer instruments onboard the Cluster [1], Double Star [2] and THEMIS [3] spacecraft during the periods February 2001 to July 2015, January 2004 to September 2007, and January 2008 to January 2015 respectively. The  STAFF-SA (Spatio-Temporal Analysis of Field Fluctuations Spectrum Analyser) [4] onboard both the Cluster and Double Star spacecraft, measured magnetic field oscillations in the frequency range 8 Hz to 4 kHz using 27 logarithmically spaced frequency channels and a sampling rate in the range of 1 to 8 Hz. THEMIS data come from the search coil magnetometer (SCM) [5] on satellites A, D, and E. SCM was designed to investigate magnetic field oscillations in the frequency range 0.1 Hz to 4 kHz in 6 frequency bands (filter bank mode) and sampling rates between 1/16 to 8 Hz. Wave amplitudes measured at frequencies, omega, 0.1*Omega_ce < omega < 0.5*Omega_ce, were used to obtain the wave power of LBC for each spacecraft in time, L-shell, Magnetic Local Time (MLT) and magnetic latitude. The equatorial electron gyrofrequency, Omega_ce, calculated using the simple equatorial model (29000*28/L^3) for lower band chorus waves [6,7]. The data is processed in the frequency range from  0.1*Omega_ce < omega < 0.5*Omega_ce equatorial for each L-shell. The STAFF and SCM instruments provide specific frequency range and frequency bands.

[1] Escoubet, C. P.; Schmidt, R. & Goldstein, M. L. Cluster - Science and mission overview Sp. Sci. Rev., 1997, 79, 11-32

[2] Liu, Z. X.; Escoubet, C. P.; Pu, Z.; Laakso, H.; Shi, J. K.; Shen, C. & Hapgood, M. The Double Star mission Ann. Geophys., Copernicus Publications, 2005, 23, 2707-2712

[3] Angelopoulos, V. The THEMIS mission Sp. Sci. Rev., 2008, 141, 5-34

[4] Cornilleau-Wehrlin, N.; Chauveau, P.; Louis, S.; Meyer, A.; Nappa, J.; Perraut, S.; Rezeau, L.; Robert, P.; Roux, A.; De Villedary, C.; De Conchy, Y.; Friel, L.; Harvey, C.; Hubert, D.; Lacombe, C.; Manning, R.; Wouters, F.; Lefeuvre, F.; Parrot, M.; Pinçon, J.; Poirier, B.; Kofman, W. & Louarn, P. The Cluster Spatio-Temporal Analysis of Field Fluctuations (STAFF) Experiment Space Sci. Rev., Space Science Reviews, Kluwer Academic Publishers, 1997, 79, 107-136-

[5] Roux, A.; Le Contel, O.; Coillot, C.; Bouabdellah, A.; de la Porte, B.; Alison, D.; Ruocco, S. & Vassal, M. The Search Coil Magnetometer for THEMIS Space Sci. Rev., Space Science Reviews, Springer Netherlands, 2008, 141, 265-275-

[6] Meredith, N. P.; Horne, R. B.; Sicard-Piet, A.; Boscher, D.; Yearby, K. H.; Li, W. & Thorne, R. M. Global model of lower band and upper band chorus from multiple satellite observations J. Geophys. Res., 2012, 117, A10225-

[7] Agapitov, O.; Artemyev, A.; Krasnoselskikh, V.; Khotyaintsev, Y. V.; Mourenas, D.; Breuillard, H.; Balikhin, M. & Rolland, G. Statistics of whistler mode waves in the outer radiation belt: Cluster STAFF-SA measurements J. Geophys. Res. Space Physics, 2013, 118, 3407-3420