Plot
? |
Symb
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Source
* |
Average ? |
Thresholds ? |
N_
data |
QC1
parameter |
Data
downloads |
Remarks |
| method |
value |
unit |
method |
value |
| 1 |
• | LOCAL |
MEDIAN |
-0.35778 |
arcsec |
VAL | -2,1 |
545 |
delta_iq |
n/a |
measured IQ minus corrected DIMM seeing (closed AO loop) |
| 2 |
• | LOCAL |
MEDIAN |
-0.0782 |
arcsec |
VAL | -1,1 |
961 |
delta_iq |
n/a |
measured IQ minus corrected DIMM seeing (open AO loop) |
| |
|
*Data sources: QC1DB: QC1 database; LOCAL: local text file
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This plot
Measured image quality versus expected image quality from science observations.
Measured image quality: median FWHM of cross-dispersion profile in combined frames.
Expected image quality: DIMM seeing corrected for telescope diameter, airmass, and wavelength.
Downloaded data for measured IQ come in pixels, correction is 0.086
arcsec/pix.
General information
Click on any of the plots to see a close-up version.
The latest date is indicated on top of the plot, data points belonging to that date are specially marked.
If configured,
- 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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