Script name
|
Purpose
|
| AN-resort.py | This is useful for re-sorting the D-term
solutions from AIPS antenna tables into a human-readable format and
for further processing like plotting.
|
| angsep.py | Use this to calculate the angular separation
of two points on the sky (or on the ground - as you wish :-). If the
separation is less than one arcsecond, the separation is calculated
using the diagonal of a plane triangle.
|
| avg.py | A script to calculate the average, standard
deviation, sum and mean of all colums or lines of an array of
numbers. You have to specify "-cols" or "-lines" or the script won't
do anything.
|
| baseline_sensitivity.py | Calculates the baseline
sensitivity of two antennas with equal SEFDs.
|
| bh-diameter.py | Calculates the number of Schwarzschild
radii across a given angle. Can be used to estimate how many event
horozons fit into the synthesized beam to estimate how far you are
from resolving the AGN.
|
| brightness_temperature.py | Calculates the brightness
temperature of a radio sources directly from Planck's law. The
geometry of the source is assumed to be an evenly radiating disc of
the given diameter.
|
| count.py | Counts from one number to another with a
specified increment and prints out all numbers inbetween either in one
line or in a column.
|
| cplx2rad.py | Treats two numbers specified on command line
as real and imaginary parts of a complex number and prints out the
length of the vector and the angle.
|
| dec2deg.py | Converts a declination in hms format to
degrees.
|
| deg2dec.py | Converts degrees to a declination in hms
format.
|
| deg2ra.py | Converts degrees to right ascension.
|
| deg2rad.py | Converts degrees to radians.
|
| difwin2aipswin.py | Converts Difmap windows to the AIPS
window format which can be read by IMAGR using the BOXFILE
parameter. Useful if you want to reproduce the Difmap imaging in AIPS
for, e.g., polarimetry images.
|
| ffstg_lcp_only.py | The "fast frequency switching tabe
generator". Uses an AIPS solution (SN) table and scales the phases by
a given amount. I use this to calibrate high-frequency VLBI
observations with interleaved low-frequency scans.
|
| flagfinder.py | Sorts out those flags from a VLBA flagging
table that flag time spans longer than a specified interval.
|
| gd2jd.py | Converts a gregorian date and time to julian
date. This script is buggy and reports Julian dates which are off by a day
or two, depending on how far back you go. For example, 11 March 1609 converted
to JD will be off by two days. 20th and 21st century seem to be fine, though.
|
| get_bibtex.py | Program to fetch bibtex refs from ADS. On
the commandline, provide a text file with one bibcode per line.
|
| get_eff.py | Program to fetch the Effelsberg webcam image
every 10 seconds and to store it on local data disk with a unique
timestamp. I use the images to compile movies from the webcam images.
|
| image-sensitivity.py | Calculate the nominal image
sensitivity in a VLBI observation with a given number of equally
sensitive antennas (e.g., the VLBA).
|
| jd2gd.py | Converts julian date to gregorian date and
time. I don't know whether this script suffers from a similar error as
gd2jd.py - treat results with care.
|
| m2pc.py | Converts meters to parsecs.
|
| make_movie.py | Prepares a command file for mpeg_encode to
generate a movie from the Effelsberg webcam images fetched by
get_eff.py.
|
| pc2m.py | Converts parsecs to meters.
|
| plotit.py | Plots (x,y)-data read from a file using the
Pgplot routines. Can also be used to interactively flag data from that
file and to calculate averages and standard deviations with
interactively specified areas of the plot.
|
| polar2rect.py | Program to convert polar coordinates to
rectangular coordinates and to calculate T_b (don't know how
trustworthy that is, better is to use brightness_temperature.py for
this) from Difmap model files. It prints out a table of distances
among all model components.
|
| propmotion.py | Calculates proper motions of objects. Also
useful to calculate the scale in an image, i.e., parsecs per
arcsecond.
|
| ra2deg.py | Converts a right ascension to degrees.
|
| rad2deg.py | Converts radians to degrees.
|
| remspace.py | Removes spaces from names of specified files
or all filenames in current directory.
|
| rotation_measure.py | Calculates the rotation measure in
an magnetized plasma.
|
| sensitivity.py | Calculate the image sensitivity of an
inhomogeneous VLBI array, depending on the mututal source visibility
at every two antennas. Prepare a data file of the format
20 000000000000000000000000111111111100000000000000
296 000000000000000000000000111111111100000000000000
where the first number is the antenna SEFD and the 48 digits inidcate
times at which the source is above the horizon at the
antenna in 30 min bins during 24 h.
|
| spix.py | Calculates the spectral index from flux density
measurements at two frequencies.
|
| tau_ff.py | Calculates the optical depth of a plasma in
the radio regime.
|
| vector_rotation.py | Rotates a vector specified on the
command line n times through an angle p and calculates the vector
sum. Helps to estimate the coherence loss when VLBI data are averaged
over a certain time interval.
|