Solar Physics>Heliospheric Physics
Space Physics>Interplanetary Studies

See https://spp-isois.sr.unh.edu/ISOIS_Terms_of_Use.html.
Cite as, "McComas et al. (2016)" and contact the ISOIS instrument team before publication. Please do not distribute this file.

EPI-Lo, Ion Composition mode.
Instrument paper: Integrated Science Investigation of the Sun (ISIS): Design of the Energetic Particle Investigation. McComas, D. J. et al (2016). Space Sci. Rev., doi:10.1007/s11214-014-0059-1

Data 
Instrument paper at 
Magnetic field data for pitch angle calculation courtesy of 
Coordinate systems according to definitions of 
Detailed information in 

Release 17 (data 5.0.0, code 5.0.0): Add Quality_Flag variable for each epoch indicating any potential concerns with the data. See the ISOIS Data Glossary for details.

ISOIS-EPILO>Integrated Science Investigation of the Sun, Energetic Particle Instrument Lo

Rules of Use
Space Science Reviews
the FIELDS team
Fraenz and Harper, PSS, 2002.
ISOIS Data Glossary

One half integration time in nanoseconds. Used for DELTA in Epoch.

[Spectrogram, averaged over 80 Look Directions for these variables] H count rate channel P (HiResProtons)

Ion Composition mode. Corrected for deadtime. May contain significant photon counts, particularly directions L31, L34, L35. See Hill, M.E. et al., 2020, ApJS, doi:10.3847/1538-4365/ab643d .

Ion Composition mode. May contain significant photon counts, particularly directions L31, L34, L35. See Hill, M.E. et al., 2020, ApJS, doi:10.3847/1538-4365/ab643d .

Based on a combination of rate scaler compression and Poisson statistics. One sigma.

[All options, except plots, available for these variables] H counts channel P (HiResProtons)

Ion Composition mode. Raw counts per integration. May contain significant photon counts, particularly directions L31, L34, L35. See Hill, M.E. et al., 2020, ApJS, doi:10.3847/1538-4365/ab643d .

Unit vector, after Fraenz and Harper, PSS, 2002. ChanC timebase.

At timestamp. After Fraenz and Harper, PSS, 2002. ChanC timebase.

Unit vector, after Fraenz and Harper, PSS, 2002. ChanD timebase.

At timestamp. After Fraenz and Harper, PSS, 2002. ChanD timebase.

Unit vector, after Fraenz and Harper, PSS, 2002. ChanP timebase.

At timestamp. After Fraenz and Harper, PSS, 2002. ChanP timebase.

Unit vector, after Fraenz and Harper, PSS, 2002. ChanR timebase.

At timestamp. After Fraenz and Harper, PSS, 2002. ChanR timebase.

Unit vector, after Fraenz and Harper, PSS, 2002. ChanT timebase.

At timestamp. After Fraenz and Harper, PSS, 2002. ChanT timebase.

Angle between particle direction and nominal outward Parker Spiral, based on 400km/s solar wind and corotation breakdown at 10Rs.