Custom Query (241 matches)

I would like to change the channel width of an SDFITS file from 33815 Hz to 33571 Hz in order to match an older file (for Gridzilla). Since the new channel has a narrower width, I try:

s.resample(width=0.99638)

Then I save it as a new SDFITS. But Gridzilla tells me the following. For the original file:

10:29:28: gridzilla: Brightness units are "Jy".

10:29:28: gridzilla: Spectral range: 115123.094 to 115261.067 MHz

10:29:28: gridzilla: in 4096 channels spaced by 33.693 kHz.

For the new file:

10:43:39: gridzilla: WARNING: Brightness units not recorded in the input data.

10:43:39: gridzilla: Spectral range: 115122.051 to 115261.067 MHz

10:43:39: gridzilla: in 4112 channels spaced by 33.816 kHz.

So the number of channels AND the width of each channel seems to have increased, which doesn't make sense. If I use width > 1, the number of channels and the width of each channel decreases. So something seems to be wrong here.

Another problem is that the brightness units don't seem to be saved in the new SDFITS file: Gridzilla doesn't want to combine files with inconsistent brightness units.

Tony

I tried linefinder with the Mopra dataset (G327 - tutorial 2 from the Parkes school), IF=2. It failed to find any lines. A few couts show that at the C++ level the code receives 'nan' in every spectral channel. I suspect it may have something to do with the flagging of the edge channels (which is required to remove rubbish near the edge of every IF in the MOPS broadband mode). This particular dataset doesn't work with older ASAP revisions (installed on kaputar and eulah-cj) either.

Malte,

I recently did a clean install of Snow Leopard (10.6). Since I already had python 2.5 installed in /opt/local with MacPorts?, I decided to install all of the ASAP dependencies using MacPorts?:

py25-matplotlib py25-ipython etc.

This seemed to work fine, and ipython works ok (did the plotting test). However, I get wrong architecture errors when running ASAP:

ImportError?: dlopen(/opt/local/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/asap/_asap.so, 2): no suitable image found. Did find:

/opt/local/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/asap/_asap.so: mach-o, but wrong architecture

Not sure if I need to start from scratch using the instructions in the wiki, or whether there's another possible fix. Maybe I can't use the 10.5 ASAP distribution for 10.6?

By the way, it would be immensely useful to make ASAP available as a MacPorts? package. I don't know how hard this would be, but it really works nicely at resolving dependencies.

Tony