Cassini/MIMI/CHEMS Plots

On this website we offer two types of data:
(1) 20-day plots of ion Mass per Charge versus time of detection (UT).
(2) 20-day energy per charge Spectrograms for six ion species (H⁺, He⁺, H₂⁺, He⁺⁺, O⁺⁺, W⁺).
Both types of plots have one-hour resolution and are based on CHEMS PHA data. The water ion group W⁺ includes O⁺, OH⁺, H₂O⁺, and H₃O⁺.
Use the drop-down lists to choose a plot. Select the year, 20-day time period, and energy per charge step group (for M/Q plots) or ion species (Spectrograms). The E/Q step groups are:

In the Spectrogram section, you may also choose to get a .txt file including all flux values appearing in the spectrogram along with statistical uncertainties. That information is available for all three CHEMS telescopes combined (full 4° x 159° FOV) or by individual telescope (4° x 53° FOV) for years after 2003.

^†Not necessarily the most recent data.

Report technical problems to Doug Hamilton at dch@umd.edu