Plot
? |
Symb
? |
Source
* |
Average ? |
Thresholds ? |
N_
data |
QC1
parameter |
Data
downloads |
Remarks |
| method |
value |
unit |
method |
value |
| 1 |
• | QC1DB |
MEDIAN |
407.974 |
ratio |
VAL | 200,1400 |
12 |
qc_SNR_zero_odd |
this |
last_yr |
all
|
SlowPolarimetry, detector 1 |
| 2 |
• | QC1DB |
MEDIAN |
414.829 |
ratio |
VAL | 200,1400 |
12 |
qc_SNR_zero_odd |
this |
last_yr |
all
|
SlowPolarimetry, detector 2 |
| 3 |
• | QC1DB |
MEDIAN |
260.033 |
ratio |
VAL | 200,1400 |
13 |
qc_SNR_zero_odd |
this |
last_yr |
all
|
FastPolarimetry, detector 1 |
| 4 |
• | QC1DB |
MEDIAN |
263.473 |
ratio |
VAL | 200,1400 |
13 |
qc_SNR_zero_odd |
this |
last_yr |
all
|
FastPolarimetry, detector 2 |
| |
|
*Data sources: QC1DB: QC1 database; LOCAL: local data source
|
Plot 1
scores:  1|
| | data source: | sphere_zimpol_iflat_pol
(QC1 database) |
| dataset: | qc_SNR_zero_odd | • |
| median: | 407.974 | ratio |
| fixed thresholds: | 200...1400 | ratio |
| N_data plotted: | 12 |
| [click plot for closeup] |
Plot 2
scores: 1|
| | data source: | sphere_zimpol_iflat_pol
(QC1 database) |
| dataset: | qc_SNR_zero_odd | • |
| median: | 414.829 | ratio |
| fixed thresholds: | 200...1400 | ratio |
| N_data plotted: | 12 |
| [click plot for closeup] |
Plot 3
scores: 1|
| | data source: | sphere_zimpol_iflat_pol
(QC1 database) |
| dataset: | qc_SNR_zero_odd | • |
| median: | 260.033 | ratio |
| fixed thresholds: | 200...1400 | ratio |
| N_data plotted: | 13 |
| [click plot for closeup] |
Plot 4
scores: 1|
| | data source: | sphere_zimpol_iflat_pol
(QC1 database) |
| dataset: | qc_SNR_zero_odd | • |
| median: | 263.473 | ratio |
| fixed thresholds: | 200...1400 | ratio |
| N_data plotted: | 13 |
| [click plot for closeup] |
This plot monitors the signal-to-noise ratio (SNR) generated by the halogen lamp in ZIMPOL polarimetry.
Only the polarimetric direction = zero and cycle = odd signal is monitored.
The following setups are covered:
- V filter, DIT, NDIT = 4.0, 10
- N_R filter, DIT, NDIT = 2.0, 20
- N_I filter, DIT, NDIT = 2.0, 40
The plot contains four boxes, which shows the signal-to-noise ratio
for both read modes (SlowPolarimetry and Fastpolarimetry) and for both
detectors.
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
|
mirror sites:
PL (internal
link) HQ
[?]
