source: branches/polybatch/python/coordinate.py@ 2706

Last change on this file since 2706 was 1823, checked in by Kana Sugimoto, 14 years ago

New Development: No

JIRA Issue: No (merge: recover logs)

Ready for Test: Yes

Interface Changes: No

Module(s): nothing just logs

Description:

restored several codes from tags/asap-trunk-no-alma to recover change logs.
In addition, STFITSImageWriter.cpp is modified by hand to merge a change in alma branch.

File size: 652 bytes
Line 
1from asap._asap import coordinate as _coordinate
2
3class coordinate(_coordinate):
4 """Representation of the spectral coordinate of the data (frequency axis).
5 """
6 def to_frequency(self, pixel, unit='Hz'):
7 """
8 Convert a channel/pixel value to a frequency.
9 """
10 umap = {'GHz': 1.e9, 'MHz' : 1.e6, 'kHz': 1.e3, 'Hz': 1. }
11 return _coordinate.to_frequency(self, pixel)/umap[unit]
12
13
14 def to_velocity(self, pixel, unit='km/s'):
15 """
16 Convert a channel/pixel value to a velocity.
17 """
18 umap = {'km/s': 1, 'm/s': 1e-3}
19 return _coordinate.to_velocity(self, pixel)/umap[unit]
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