Combined dynamic spectra for energetic ions and electrons as measured by STEP, EPT and HET in the sunward looking direction (along the average Parker spiral). The spectra are normalized by multiplying the particle intensities by the energy squared to improve the visibility over the entire energy range.
Dynamic spectra for energetic ions observed by all 4 EPT telescopes. The spectra are normalized by multiplying the particle intensities by the energy squared to improve the visibility over the entire energy range. EPT sun and anti-sun telescopes look along the average Parker spiral in opposite directions. EPT north and south telescopes point respectively towards the north and south ecliptic hemispheres.
Dynamic spectra for energetic electrons observed by all 4 EPT telescopes. The spectra are normalized by multiplying the particle intensities by the energy squared to improve the visibility over the entire energy range. EPT sun and anti-sun telescopes look along the average Parker spiral in opposite directions. EPT north and south telescopes point respectively towards the north and south ecliptic hemispheres.
Dynamic spectra for selected ion species as measured by the SIS A telescope. The SIS A telescope looks sunward in the direction of the average Parker spiral.
Time series of energetic ion and electron intensities for selected particle energies in the EPD range. EPT and HET omnidirectional intensities are calculated by averaging the measurements of the four telescopes.
Plots are updated every hour using the latest data available on ground.
Ion intensities are calibrated assuming that all particles are protons, but STEP and EPT (energies below ~6MeV) may include contributions from heavier ions.
Electron intensities may suffer from contamination by ions. Ions with energies over ~400 keV can penetrate the EPT foil, affecting electron measurements. This is particularly visible in the higher energy channels. STEP electron intensities (below ~30 keV in the plot) are obtained by comparing the integral and magnet channel measurements. Periods with intense ion fluxes may produce artifacts in the electron data (either fake increases or black patches).
Ion intensities are calibrated assuming that all particles are protons, but may include contributions from heavier ions.
Electron intensities may suffer from contamination by ions. Ions with energies over ~400 keV can penetrate the EPT foil, affecting electron measurements. This is particularly visible in the higher energy channels.
During some spacecraft maneuvers, the high voltage power supply of SIS must be lowered for safety reasons. This appears in the plots as periods where the measured intensities fall abruptly to zero, which are not real. The affected periods can be consulted in the list of spacecraft operations (SIS HV off).
These plots are automatically generated using low latency data sent by EPD for monitoring purposes. They don't reflect the quality of the final data products and should not be used for serious scientific analysis.