Plot ? |
Symb ? |
Source * |
Average ? |
Thresholds ? |
N_ data |
QC1 parameter |
Data downloads |
Remarks |
method |
value |
unit |
method |
value |
1 |
| QC1DB |
none |
|
arcsec |
none | |
66 |
fwhm_spec |
this |
last_yr |
all
|
measured IQ vs. corrected DIMM seeing, I+J bands |
2 |
| QC1DB |
none |
|
arcsec |
none | |
29 |
fwhm_spec |
this |
last_yr |
all
|
measured IQ vs. corrected DIMM seeing, H band |
3 |
| QC1DB |
none |
|
arcsec |
none | |
95 |
fwhm_spec |
this |
last_yr |
all
|
measured IQ vs. corrected DIMM seeing, K band |
4 |
| QC1DB |
none |
|
arcsec |
none | |
9 |
fwhm_spec |
this |
last_yr |
all
|
measured IQ vs. corrected DIMM seeing, L band |
5 |
| QC1DB |
none |
|
arcsec |
none | |
6 |
fwhm_spec |
this |
last_yr |
all
|
measured IQ vs. corrected DIMM seeing, M band |
6 |
| QC1DB |
none |
|
arcsec |
none | |
205 |
fwhm_spec |
this |
last_yr |
all
|
measured IQ vs. corrected DIMM seeing, all bands |
|
*Data sources: QC1DB: QC1 database; LOCAL: local text file
|
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
|