Health Check monitor:
plot information

Last update: timestamp of creation of this page and plot (UT)

Now: current timestamp (UT) (press Ctrl+R to enforce reloading of the page, it may be cached)

(0d 20h:05m ago): difference of both timestamps (requires javascript enabled)

ftp monitor. For HC plots with OPSLOG data, there is a monitor for the ftp process (OPSLOG files from Paranal to Garching) and the parsing process (executed on the QC machines). A javascript calculates the difference between NOW and the respective timestamps of these two processes. If these differences are less than 2 hours, the corresponding boxes are coded green, otherwise red. If after 12 UT no OPSLOG fle has arrived, the code is grey, since then it is unknown if there is a problem or if no OPSLOG data are available (because e.g. all daytime calibrations have already been processed before 12 UT).

ftp parser	ftp and parser results not older than 2 hours
ftp parser	ftp result older than 2 hours, may indicate a problem; parser is up and running
ftp parser	ftp and parser results older than 2 hours; the parser process is stopped; the ftp process cannot be monitored (so it could be ok)
... ftp parser	no ftp result since 12 UT, parser up and running, cannot decide if ftp is broken or no OPSLOG file availabe yet

Navigation

This navigation links to:

• this file;
• the process description (users guide);
• a file with additional information (time zone information, link to ASM, technical monitor of ftp and parser process).

Group navigation. Plots are often grouped together. For instance, plots with detector properties could be grouped like:

same group:	bias		dark	linearity&gain	fp-noise	contamination

The most important plots are marked:   daily/often; important to check These are the ones which are fed daily by dedicated health check calibrations. These are also the ones which should be checked daily. The other ones are also of interest but are not filled so frequently.

The second line displays the report scores (see here).

OPSLOG information. If OPSLOG data are included, their numbers are collected here. There is the option to inspect or download these data.

last OPSLOG data: 2007-11-06	Plot:	1	2	3	4	5		latest files	ftp parser	N_data: number of recent OPSLOG entries plotted here
	N_data:	7	7	7	-	-		availability

Quick-look navigation, history, tutorial, contact. If enabled for QUICK-LOOK versions, the HC plots have a link labelled as 'less', which has its counterpart on the QUICK-LOOK version ('more'). Here you can toggle between these two views.

less ... | history ... | plot tutorial ... | contact                 daily/often; important to check     [?]

History. Many HC plots have a HISTORY link. This link opens the set of HISTORY plots in a separate window.

close window	history:	2003	2004	2005	2006					2007					2008					HEALTH	FULL
		...	...	...

"HEALTH" is the HC plot, the only one to contain OPSLOG data (if configured and if available).
"FULL" is a link which sometimes exist and combines all historical data points in one plot.

Tutorial. Often this link exists and provides additional information about the QC items, the data, the algorithms etc. These pages are in the instrument QC section.

Contact. Send an email to the QC scientist responsible for this particular HC page.

Result table

Find in this table more details about the applied statistics and the current trend.

Plot symbols

The symbols used in the plots are displayed in the column "Symbols". An attempt has been made to display them in the HTML pages as they are shown on the MIDAS plots, but some symbols do not exist as HTML code and show up here as bracketted number, like [20]. The table below lists all possible plot codes and reveals that [20] stands for a filled triangle.

Statistical functions

Average:

method		implementation
MEAN	average (with clipping if combined with certain threshold option, see below)	MIDAS: stat/tab; outputr(3)
MEDIAN	median (with clipping if combined with certain threshold option, see below)	MIDAS: stat/ima; outputr(8)
NONE	nothing applied

The average values are listed in the result table (together with their units and the number of data points evaluated). They are indicated in the plots by a solid line. They are clipped (outliers beyond the thresholds are removed after first calculation, then the calculation is repeated with the cleaned data set) if combined with certain threshold options (see below).

Thresholds:

method		implementation	clipping
1SIG	standard deviation	MIDAS: if Average=MEAN: stat/tab; outputr(4) if Average=MEDIAN: stat/ima; outputr(4)	yes
3SIG	standard deviation	3times 1SIG	yes
PER=val1	relative thresholds	percentage of average; e.g., PER=10: thresholds are 10% of average value	yes
OFF=val1	relative thresholds	as PER, but fixed offset; e.g., OFF=0.05: thresholds are average ± OFF	yes
VAL=val1,val2	fixed thresholds	thresholds are independent of average; val1, val2 listed in the result table	no
none	nothing applied		no

The threshold values are listed in the result table. These values are indicated in the plots by broken lines, and are used to detect and mark statistical outliers. 1SIG, 3SIG, PER and OFF thresholding is relative to the average value. 1SIG and 3SIG is dynamic and based on the statistical results for rms, PER and OFF are fixed relative to the average value. VAL thresholding is completely static and might represent e.g. a specification or an alarm level based on experience or specifications.

Outliers. Statistical outliers are marked if thresholds are defined and plotted. Marking is done by a red asterisk (to become blue if the symbol color is red).

Data points outside the Y range. These data points are marked by a red arrow.

OPSLOG data points. The data points from OPSLOG files (produced by the on-line Paranal pipelines) are always marked by a filled blue circle •.

LAST data point. If configured, all data points from the last date are highlighted by a large magenta circle •.

Data source:

method
QC1DB	QC1 database (final, certified QC1 parameters from pipeline processing by QC)
OPSLOG	QC1 ops logs (preliminary QC1 parameters from automatic pipeline processing on Paranal)
LOCAL	Local data source (QC1 parameters not yet ingested into QC1 database, e.g. since they are under development; not considered a permanent option!)

Scores and quick-look

Scores are currently being implemented on the Health Check monitor. The goal is to have this finished by the end of 2008. Instruments with already operational scores have their Health Check pages marked " scores active".

Quick-look version. Clicking on less ... brings you to the QUICK-LOOK page. It has the score result table:

DARK parameters (last 6 days)
	1: DARK_current 1|	2: GLOW 2|

It displays scores for each HC report. Scores are flags assessing the compliance of data points with configured thresholds. A green score symbol indicates that the corresponding instrument component performs OK in the monitored time range, a red one may indicate a problem.

Each plot in the report has one score table cell. Each cell displays a set of scores. Scores are displayed for the last 6 days only.

Scores are based on QC1 parameters. They are checked against an upper and lower threshold. If compliant, the score is 0, otherwise 1. An outlier is scored as 1.

All scores are aggregated to plot scores and report scores. If no outlier is found, the corresponding plot is scored OK and marked green. Outliers get a NOK score and are marked red:

2: GLOW 2| This plot has two QC data points in the monitored time range, both scored OK.   2: GLOW 2| ... a NOK score.

Plot scores. If the last QC data point for a plot is found NOK, the total score for the plot is NOK and marked red (see below). If any other QC data point is found red but the last one is green, the total score for the plot is OK and marked green (since it is assumed that the problem is solved in the meanwhile).

2: GLOW 2| Both data points are scored OK. The plot score is OK.   2: GLOW 2| Same plot, with one data point scored NOK (but not the last one) . The plot score is OK. 2: GLOW 2| Same plot, with the last data point scored NOK. The plot score is NOK. 3: ALL_GLOW multiple dataset Note: Plots with multiple data sets cannot be scored.

Report scores. Total scores per plot are accumulated to report scores and displayed at larger size (see example above). Report scores can be OK, NOK or grey ("no scoring implemented"). If no plot score is red (some may be grey), the plot score is OK and marked green. A single red plot score will turn the report score also red. Reports without scoring are marked grey and are not evaluated further.

Report scores are repeated in the group navigation bar, for quick reference:

same group:	bias		dark	linearity&gain	fp-noise	contamination

Group scores. Likewise, report scores are accumulated to group scores. They are displayed in the vertical navigation bar at left:

FLAMES/GIRAFFE:
detector
grating stability
lamp stability
flat level
wavelength calib

If you want to monitor the current health of an instrument, you start with its navigation bar. Either all items are green, or you find at least a red one. In that case, follow any red score to the group level, find the corresponding report and plot scores. There you may want to check the detailed HC plot. All in all 2 levels to see the QC data point which causes the alert, and 3 to see all details.

Contact: <qc@eso.org>