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In this wiki we aim to create a guide of the info displayed by the different monitors running at the telescope. The monitors Mopsic Monitor, and MonCoo must be running always at the telescope. The only exception is in case of maintenance time, when the version of mopsic can be changed, or doing Absorber measurements with MAMBO2 in stow position (in which case the mopsic monitor must be replaced by the MonInst monitor).
MOPSIC MONITOR
This monitor displays and reduces all the observations of the bolometer MAMBO2 and continuum data from heterodyne receivers. The vncviewer port of this monitor is the 27.
Information displayed
General Info
This figure shows the normal display of the monitor.
From this snapshot we can see that the last pointing was done on G34.3, using the bands E1 and E3, at freq. 173.507GHz and 267.557 GH, 2160 seconds ago, the scan was the 214 and it consisted on 4 subscans. There were some spikes. We can also see the previous pointing and focus corrections and the elevation and azimuth of the source. All this information and more is shown in the monitor. Where all these is would be explained in the following lines. However, before reading futher, I recommend you to have a first look to the snapshot and try to locate this info by yourselves.
All the panels showed by the monitor display at their top the same info in the same order: SOURCE #SCAN TELESCOPE DATE FRONTEND BACKEND. This stands for all the monitors
In the shell where the monitor was launched, it can be read how long the data has not changed. This means that during this time no continuum data, with EMIR, HERA or MAMBO2 has been taken. This can be used to see if the data is created. For instance, in case MAMBO is used and the monitor does not show the new data, this would mean that the fits are not being created, which could point towards an ABBA failure.
Note that a certain scan would only be shown once at least the first subscan has finished. - In the shell where the monitor was launched, it can be read also, the scan number, the number of subscans done.
In any panel of the monitors showing the signal against time (e.g. the bottom-right window in the previous plot) a vertical red line denotes the start of a subscan, while a green line denotes the end of it. Any problem of those described below that happens between a green and a red line in the signal plot can be ignored, since it happened between subscan, i.e. does not affect the data.This stands for all the monitors
Heterodyne
MAMBO2
In general, expect of the skydips, the bolometer plots are always divided in 5 panels, and a central section with the information of the observation. From top to bottom and left to right the panels are:
- For pointing and focus shows the fitting. For on-off and maps it shows the reduced map.
- For pointing and focus shows the map of the signal observed with MAMBO. For pointings shows the signal .vs time result of the reference pixel with the flux and rms. For maps the double beam map with the rms.
- Total power panels. The upper panel show the variation of the opacity in the line of sight along the observation. The stars correspond to skydip measurements. For each of these measurements a value of the opacity in the line is plotter (e.g. losTau1). The red, green and dark blue lines correspond to the three total power channels of MAMBO2. The light blue shows an average of the other three lines. The bottom panel shows the change of the signal received by these total power channels, in Jy/beam.
- It shows the a map of the rms for the different bolos. This is plotted twice, the first without filtering the correlated signal, which gives the mean rms shown in red in at the top of the panel, and then it overplots the rms map after filtering the correlated signal, which give a new mean rms show in blue at the top of this panel.
- Signal vs. time panel, showing the signal evolution for different included the reference one. The red signal corresponds to the raw signal, and the blue one with the signal after filtering the correlated noise.
In the central section, it can be found from left to right ordered by line from top to bottom the following info :
- Project , Number of subscans done and commanded, Gain used
- UT time of the observation, LST time of the observation, Scan duration
- Azimuth, Elevation, Changes in Az. and El. along the scan.
- Corrections of pointing and focus corrections (col*, nulE, SFCZ)
- Wobbler info: throw commanded, wobbling period and rotation angle.
MAMBO2 Pointing
The screen is
MAMBO2 Focus
MAMBO2 Onoff
- Upper left: on-off RA/DEC map of all pixels. The RA/DEC 0/0 denotes the reference pixel for pointing.
- Upper right: center pixel (53): before/after skynoise reduction, i.e. correlated signal filter (CSF, red/green)
- Lower left:
- A star denotes the result of the last sky dips, i.e. the sky emissivity at the source elevation CHECK
- Output of 3 DC pixels to check for changes in the sky emissivity
- upper: line of sight (los) opacity (showing elevation effect and others)
- lower: total power
- Lower center:
- noise in the data before/after the CSF (the plot before is/will be overplotted with the noise after the CSF, in this particular case the rms in the data after CSF is visible, the numbers above the plot 49.5/51mJy/beam give the rms values of the high frequency noise component)
- gain 1 (in this particular case)
- col*/nule/sfcz, i.e. pointing and focus offsets
- throw 32", period 520msec, rotator angle 0
- Lower right: time series of 4 pixels (51, 52, 53, 54), before and after sky noise subtraction
MAMBO2 Map
MAMBO2 Skydip
Indication of Problems
Monitor stacked
- This has never happened so far. In case it happens the procedure is kill the process, make sure that there is no other mopsic @ monitor running, remove the lockfile and restart the monitor.
New data not shown
- First, note that only once the first subscan of a certain scan has been observed it will appear in the monitors (mopsic monitor, monCoo or monInst). In case the data is not continuum it would appear in the monCoo, but not in the rest (see below).
In case the most recent continuum data is not shown the most probable problem is that the fits files are not being created. In case of MAMBO2, please check that ABBA is working properly.
Signal Jumps
- This plot shows a map. It can be seen in the signal vs. time panels that there is a signal jump both in the raw signal and in the filtered one. There is not clear reason for this problem. In case this happens the Pool coordinator should be informed immediately.
Spikes
- Here are plotted two scans, a pointing and an onoff both showing clearly spikes in the signal vs. time panels.
In the past spikes appeared due to a water leak that affected the pre-amplifier of MAMBO. Now, there is a cover on the pre-amplifier to avoid such problem. In principle, anything crossing fast the optical path could cause an spike (e.g. a water drop). This was tested by GQ simulating leaks. It was also found that lease cable connection could cause spikes. In any case, if this problem appears, the Pool Coordinator should be informed immediately
Error Messages
COORDINATES MONITOR
Information displayed
Indication of Problems
INSTABILITIES MONITOR
Information displayed
Indication of Problems
Spikes
Signal Jumps
Warming up
Warmed up
