Plot
? |
Symb
? |
Source
* |
Average ? |
Thresholds ? |
N_
data |
QC1
parameter |
Data
downloads |
Remarks |
| method |
value |
unit |
method |
value |
| 1 |
• | QC1DB |
MEDIAN |
0.0691 |
none |
VAL | -0.01,0.2 |
5 |
qc_ellipticity |
this |
last_yr |
all
|
PSF Ellipticity (1-b/a) NB118, average over all 16 detectors |
| 2 |
• | QC1DB |
MEDIAN |
0.0646 |
none |
VAL | 0.01,0.2 |
80 |
qc_ellipticity |
this |
last_yr |
all
|
PSF Ellipticity (1-b/a) NB118, values of all detetcors |
| 3 |
• | QC1DB |
MEDIAN |
0.0166 |
none |
VAL | 0.0,0.1 |
5 |
qc_ellipticity |
this |
last_yr |
all
|
PSF Ellipticity (1-b/a) NB118, stdev over all detectors |
| 4 |
■ | LOCAL |
none |
|
none |
none | |
96 |
qc_ellipticity |
n/a |
Score per Detector: Green = within the thresholds |
| 4 |
■ | LOCAL |
none |
|
none |
none | |
0 |
qc_ellipticity |
n/a |
Score per Detector: Red = beyond thresholds |
| |
|
*Data sources: QC1DB: QC1 database; LOCAL: local data source
|
| Plot 1 | | data source: | vircam_photstd
(QC1 database) |
| dataset: | qc_ellipticity | • |
| median: | 0.0691 | none |
| fixed thresholds: | -0.01...0.2 | none |
| N_data plotted: | 5 |
| [click plot for closeup] |
| Plot 2 | | data source: | vircam_photstd
(QC1 database) |
| dataset: | qc_ellipticity | • |
| median: | 0.0646 | none |
| fixed thresholds: | 0.01...0.2 | none |
| N_data plotted: | 80 |
| [click plot for closeup] |
| Plot 3 | | data source: | vircam_photstd
(QC1 database) |
| dataset: | qc_ellipticity | • |
| median: | 0.0166 | none |
| fixed thresholds: | 0.0...0.1 | none |
| N_data plotted: | 5 |
| [click plot for closeup] |
| Plot 4 | | data source: | local data source
|
dataset:
(numbers below apply to this dataset) | qc_ellipticity | ■ |
| average: | none |
| thresholds: | none |
| N_data plotted: | 96 |
| [click plot for closeup] |
Trending plot for image quality.
QC parameters is derived from each detector of daily photometric standard star calibrations.
Name:
Fits header: QC ELLIPTICITY,
QC1 DB: qc_ellipticity
Description:
median ellipticity of the sources = (1-b/a).
Setup:
INS.FILT1.NAME = NB118
These plots describe:
Fig. 1. Average view: The QC parameter averaged over all detectors.
This view is sensitive to common changes.
Fig. 2. Resolved View: The QC parameter resolved for all detectors.
Fig. 3. Scatter View: The standard deviation of the QC parameter, obtained from the sample of all detectors.
This view is sensitive changes of individual detectors.
Fig. 4. Scoring View: Scoring values of all 16 QC parameters.
Green = within the acceptance thresholds.
Red = beyond the acceptance thresholds.
Find more information on the VIRCAM STD tutorial page.
General information
Click on any of the plots to see a close-up version.
The latest date is indicated on top of the plot.
If configured,
- data points belonging to the latest date are specially marked
- statistical averages are indicated by a solid line, and thresholds by broken lines
- outliers are marked by a red asterisk. They are defined as data points outside the
threshold lines
- "aliens" (= data points outside the plot Y limits) are marked by a red arrow (↑ or ↓)
- you can download the data for each parameter set if the 'Data downloads' link shows up
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