Atmospheric Refraction: Converting Density Profiles to Refractivity

AI Thread Summary
The discussion centers on converting a density profile from the 1976 US Standard Atmosphere into a refractivity index profile for a project on the Green Flash. The user seeks a mathematical formula for this conversion, noting that refractive indices depend on density changes influenced by temperature and altitude. A suggestion is made to refer to the Ciddor equation for guidance on the conversion process. A link to a relevant document is provided for further reference. The conversation highlights the need for precise formulas in atmospheric studies.
natski
Messages
262
Reaction score
2
Hi,

I'm working on a project on the Green Flash and have so far been building up a program to produce the 1976 US Standard Atmosphere. I have produced the density profile for the first 86km (which I'll assume to be enough for now) and now need to convert it to a refractivity index profile.

I'm assuming refractive indices only depend on density changes (since density depends on both temperature and altitude). My question is what mathematical formula should I use? I have been unable to find a formula for converting density profiles into refactive index profiles.

Thanks,

Natski
 
Astronomy news on Phys.org
You probably should look for Ciddor equation. EDIT: http://www.cfa.harvard.edu/~jbattat/apollo/references/atmosphere/chambers_astrometryWithPanStarrsAndPS1_pushingTheLimitsOfAtmosphericRefraction_2005.pdf , page 8
 
Last edited by a moderator:

Thread 'Potential biosignature found in Mars rock'

Publication: Redox-driven mineral and organic associations in Jezero Crater, Mars Article: NASA Says Mars Rover Discovered Potential Biosignature Last Year Press conference The ~100 authors don't find a good way this could have formed without life, but also can't rule it out. Now that they have shared their findings with the larger community someone else might find an explanation - or maybe it was actually made by life.
View full post »

Thread 'Does it make sense to build new radio telescopes?'

TL;DR Summary: In 3 years, the Square Kilometre Array (SKA) telescope (or rather, a system of telescopes) should be put into operation. In case of failure to detect alien signals, it will further expand the radius of the so-called silence (or rather, radio silence) of the Universe. Is there any sense in this or is blissful ignorance better? In 3 years, the Square Kilometre Array (SKA) telescope (or rather, a system of telescopes) should be put into operation. In case of failure to detect...
View full post »
Thread 'Could gamma-ray bursts have an intragalactic origin?'

Thread 'Could gamma-ray bursts have an intragalactic origin?'

This is indirectly evidenced by a map of the distribution of gamma-ray bursts in the night sky, made in the form of an elongated globe. And also the weakening of gamma radiation by the disk and the center of the Milky Way, which leads to anisotropy in the possibilities of observing gamma-ray bursts. My line of reasoning is as follows: 1. Gamma radiation should be absorbed to some extent by dust and other components of the interstellar medium. As a result, with an extragalactic origin, fewer...
View full post »

Similar threads

Lens Maker's Formula - Confusion in the derivation
Replies
15
Views
1K
How do I find refractive index uncertainties?
Replies
3
Views
4K
Refractive index of Martian atmosphere near surface
Replies
5
Views
5K
How to find unknown refractive index to solve for theta
Replies
11
Views
2K
Rotating birefringent calcite crystals: precession of image?
Replies
7
Views
2K
I Calculating the Rotation Curves of Galactic Disks
Replies
1
Views
2K
How do you project a Sersic Profile into 3D?
Replies
1
Views
1K
Time to empty gas cylinder (problem worked, but would like feedback)
Replies
7
Views
3K
Surface brightness profiles: sech^2 fit in mag/arcsec^2 units?
Replies
1
Views
5K
Schwarzschild metric in terms of refractive index
Replies
5
Views
3K

Hot Threads

Recent Insights

Back
Top