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information_for_astronomers:user_guide:reduc_maps [2012/05/09 14:45] 127.0.0.1 external edit |
information_for_astronomers:user_guide:reduc_maps [2016/02/22 13:11] (current) hafok |
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The raw data of the 100m Effelsberg telescope is stored in MBFITS-Format. In Effelsberg the files are located in the directory /daten/Raw which should be available on every **Observer-PC**. Older data can be found in /daten/Raw/Raw-YYYY-MM. | The raw data of the 100m Effelsberg telescope is stored in MBFITS-Format. In Effelsberg the files are located in the directory /daten/Raw which should be available on every **Observer-PC**. Older data can be found in /daten/Raw/Raw-YYYY-MM. | ||
- | Every 30 minutes the raw data is synced to Bonn. It is accessible in /effbg/effdata/. More details on the location of data can be found here under [[Data storage and archive]] | + | Every 30 minutes the raw data is synced to Bonn. It is accessible in /eff/data/. More details on the location of data can be found here under [[Data storage and archive]] |
====Initial data reduction==== | ====Initial data reduction==== | ||
- | The subscans are combined to a MBFITS map with “toolbox” on the “observer3” PC in Effelsberg (login as “nod2”, ask the operator for the actual password), including baselevel subtraction and filtering of strong radio-frequency interference (RFI) signals. Some parameters can be modified by hand if needed. Transformation into NOD2 format, restoration of multi-horn data, transformation into right ascension/declination coordinates and Gaussian fitting for calibrators is done by dedicated automatic pipelines developed for each receiver. | + | The subscans are combined to a MBFITS map that should be processed with the “toolbox”. This can be done on the “observer7” PC in Effelsberg. For MPIfR observers the login can be done with their own LDAP account. Please add the directories ///opt/bin// and ///soft/astro/nod/Ubuntu14_32bit/bin.gfortran// to your path. |
+ | Note: If you want to use a different PC than observer7, which is running on Ubuntu Version 14, you have to adjust the nod2 path to use the appropriate version compiled for your operating system. | ||
- | The pipeline scripts can be found in ///home/nod2/aktuelle_scripts/// There are scripts for cal maps that are called //ketXXcal.script// and perform an additional Gaussian fitting to check the (polarization) calibration. Scripts for target maps are called //ketXXmap.script//. The XX is some acronym for each receiver mostly the wavelength in cm or mm. For the 6cm receiver there are scripts with "db" for double beam and "sb" single beam reduction. Just copy the script in your directory and call it with the scan number to be reduced. | + | <code> |
+ | # For bash | ||
+ | export PATH=$PATH:/opt/bin:/soft/astro/nod/Ubuntu14_32bit/bin.gfortran | ||
+ | |||
+ | # For csh | ||
+ | set path = ($path /opt/bin) | ||
+ | set path = ($path /soft/astro/nod/Ubuntu14_32bit/bin.gfortran) | ||
+ | |||
+ | </code> | ||
+ | |||
+ | For all other observers a common account called “obs2” can be used (ask the operator for the actual password). The toolbox performs some basic baselevel subtraction and filtering of strong radio-frequency interference (RFI) signals. Some parameters can be modified by hand if needed (see [[information_for_astronomers:user_guide:reduc_pointing|Reduction of pointing measurements]] for toolbox options). Transformation into NOD2 format, restoration of multi-horn data, transformation into right ascension/declination coordinates and Gaussian fitting for calibrators is done by dedicated automatic pipelines developed for each receiver. | ||
+ | |||
+ | The pipeline scripts can be found in ///opt/actual_scripts/// There are scripts for cal maps that are called //ketXXcal.script// and perform an additional Gaussian fitting to check the (polarization) calibration. Scripts for target maps are called //ketXXmap.script//. The XX is some acronym for each receiver mostly the wavelength in cm or mm. For the 6cm receiver there are scripts with "db" for double beam and "sb" single beam reduction. Just copy the script in your directory and call it with the scan number to be reduced. | ||
e.g. for a 11cm calibration map with scan number 0340:\\ | e.g. for a 11cm calibration map with scan number 0340:\\ |