Plot
? |
Symb
? |
Source
* |
OPS?
** |
Average ? |
Thresholds ? |
N_
data |
QC1
parameter |
Data
downloads |
Remarks |
| method |
value |
unit |
method |
value |
| 1 |
[20] | QC1DB |
no |
none |
|
mm |
none | |
471 |
PWV |
this |
last_yr |
all
|
PWV (in mm) of atmosphere above Paranal.
a) PWV from UVES standard star equivalent widths |
| 1 |
• | QC1DB |
no |
none |
|
mm |
none | |
66 |
PWV |
this |
last_yr |
all
|
b) same, from CRIRES nightlogs |
| 1 |
x | QC1DB |
no |
none |
|
mm |
none | |
53 |
PWV |
this |
last_yr |
all
|
c) same, from VISIR nightlogs |
| 1 |
+ | QC1DB |
no |
none |
|
mm |
none | |
97 |
PWV |
this |
last_yr |
all
|
d) same, from XSHOOTER telluric standard stars |
| |
|
*Data sources: QC1DB: QC1 database; LOCAL: local text file | **OPS: to indicate that OPSLOG data are included
|
This plot
This plot displays PWV values from CRIRES and VISIR
nightlogs, and from UVES standard stars.
A set of dedicated sky observations is executed regularly on CIRES and VISIR, in order to measure the
current PWV content of the atmosphere. For CRIRES, this is OB #200179115 ("PWV_5050p4"). For VISIR, this
is OB #200154321 ("SkySpectrum_MR_BurstMode"). The output data are analyzed on the fly by a routine
which fits the telluric lines to a model. The results are written into the nightlog. The
fitting routine, and its integration into operations, has been implemented by Alain Smette.
The nightlog entries are then parsed by a QC routine, written into a database
and plotted. That part has been implemented by Reinhard Hanuschik.
UVES has regular standard star measurements (usually at the begin of a
night). The pipeline product RED_STD_REDL of the 860 setting is analyzed by a
routine written by Reinhard Hanuschik. It calculates the equivalent width of
telluric lines, and transforms these values into PWV values.
All values are stored in a table and plotted here. All routines (nightlog
parser, standard star processing, plotter) are called once per hour.
The plot is expected to be up-to-date within that time-scale, provided the nightlog entries are available
and follow certain minimal critera to be parsable. Usually the pipeline
processing of the standard star data is also up-to-date within one hour.
Current criteria for nightlog parsing are:
- OB name contains "PWV" (CRIRES) or "SkySpectrum_MR_Burst" (VISIR)
- fit results are entered as one line in the comment section of that OB
- all characters are suppressed, assuming that the remaining first number is PWV in mm, and the second one (if any)
is the associated error.
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
|
CRIRES
scores ...