|
Last change
on this file since 2747 was 1697, checked in by Malte Marquarding, 15 years ago |
|
Some minor tidy up and documentation
|
|
File size:
652 bytes
|
| Line | |
|---|
| 1 | from asap._asap import coordinate as _coordinate
|
|---|
| 2 |
|
|---|
| 3 | class 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]
|
|---|
Note:
See
TracBrowser
for help on using the repository browser.
