Hi Quicklook - TOF Diagnostic Plots

[subagonsouth]

Algorithm Description:

Requirements:

From Alg. Doc ():

2.2.6 TOF Diagnostic Plots
For instrument trending purposes, and for analysis of backgrounds and quality of science data, some addi-
tional histogrammed plots should be made at this stage. They analyze the time-of-flight performance of the
detector section.
Per sensor, and for all direct events that have been annotated as “not bad” to this point:
• plot histograms of tB − tA in bins of 1 ns, for all DEs with a valid tB − tA, summed over all look
directions, separately by ESA energy and summed over all ESA steps.
• plot histograms of tC1 − tA in bins of 1 ns, for all DEs with a valid tC1 − tA, summed over all look
directions, separately by ESA energy and summed over all ESA steps.
• plot histograms of tC1 − tB in bins of 1 ns, for all DEs with a valid tC1 − tB , summed over all look
directions, separately by ESA energy and summed over all ESA steps.
• plot histograms of tC2 − tC1 in bins of 0.5 ns, for all DEs with a valid tC2 − tC1, summed over all look
directions, separately by ESA energy and summed over all ESA steps.
For all four of the plots above, it is diagnostically useful to be able to overplot the histograms not just
for all DEs with the specific valid TOF, but specifically for double-coincidence DEs that have only
the one TOF valid and no other hits. Because scientists will debate whether they want the histogram
scale to be logarithmic or linear, it’s probably best to generate both. If you generate only one, choose
logarithmic.
• plot two-dimensional histograms, using a logarithmic rainbow+white colourbar to indicate counts, with
tB − tA on the horizontal axis and tC1 − tA on the vertical, for all DEs with valid A, B, and C1 hits,
summed over all look directions separately by ESA energy and summed over all ESA steps. Use 2 ns
bins on both axes. (Use black to indicate histogram regions with zero counts.)
• plot a two-dimensional histograms as previously but with tC2 − tC1 on the vertical axis, for all DEs
with valid A, B, C1, and C2 hits, summed over all look directions and over all ESA steps. Use 2 ns
bins on the horizontal axis and 1 ns bins on the vertical axis. (Again, use black to indicate histogram
regions with zero counts.)
The TOF histogram bin sizes listed should be considered subject to change in the future. Further
two-dimensional histogram plots may be requested in the future.

[anamanica]

This ticket is currently in progress in the imap_quicklook repository. The hi_quicklook branch has the most up to date information. There are currently 3 plots being worked on at the moment: the hi_historgram_plot, the hi_de_histogram_plot, and the hi_de_tof_plot. the hi_histogram_plot method has the most work done on it, but is by no means complete.

In addition to these hi plots, SWAPI, Mag, IDEX, and ULTRA have active work being completed.

This ticket, and the IMAP-Hi L1B ticket are quite similar as work is being done on both of these tickets in the same branch of the IMAP quicklooks repository.