[OpenMadrigal-developers] PACE coordinates

[Shunrong Zhang]

Bill,

>
> Madrigal by design can't have site-specific logic such as defaulting to 300 km
> altitude for Sondrestrom.  If you need some site-specific logic, we'll need to
> write it just for you to process the data after its been taken from Madrigal.
>
> Defaulting to the position of the instrument is fine however, and I can make
> Madrigal get PACE longitude for instrument location. I did calculate the PACE
> longitude for Sondrestrom at 300 km (41.03 degrees) and 0 km (41.63 degrees).
> Let me know whether this difference is too large for you.
>

It seems we have to use the PACE longitude at 300km, instead of on the
ground. I thank we can use 300 km as a default, whether it is for
Sondrstrom of not, as I think that PACE system is largely used for upper
atmosphere studies, so 300 km should be a reasonable assumption. By the
way, from the original PACE coordinate paper, conversion is only
appropriate between 0 - 600 km.

Shunrong