Standardising units and formats (and ref frames?) in transmission

[Petr Skoda]

>> there is another catch here - the resolution in optical astronomy is mostly 
>> considered the unit-less (spec. resolution power lambda/dlambda)

> I would call that spectral resolving power, not resolution.
Yes, sorry for mistyping resolving power  instead of resolution power.


Although many people are mixing the words "resolving power" 
(lambda/dlambda) and "resolution" (dlambda)


e,g: http://en.wikipedia.org/wiki/Spectral_resolution


> I would probably allow both resolving power AND resolution, though in

Ok  - depend on context (gamma, radio, optical .. - as I understood Anita
during some discussion - radioastronomer gets a estimate of resultion 5kHz 
and he can understand the type of antenna, instrument etc .. and what he 
can see there.

In optical astronomy you tell someone 0.25A/pix and people 
ask - at what wavelength? And when said (e.g. at Halpha) they start to
compute ... I see SRP is  6563/(2(0.25) which is about 13000. (or c/RP=
23km/s ....)

> characterisation that
> is expressed by both the location and the bounds of the "resolution":

Yes (I have just checked)   both expressions  are covered in spectral data 
model 
but I do not know how it is elsewhere (e.g. in registries I have had seen 
only the resolution with units)

Ok, sorry for this discourse from Time/angle issue..

Petr

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