graham/prop
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Update about page: ten factors, mention PWAT and native duct detection

Browse source
This commit is contained in:
Graham McIntire 2026-04-11 13:52:25 -05:00
parent 0448ff47cc
commit bac0bc3a98
1 changed files with 7 additions and 6 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

13
lib/microwaveprop_web/live/about_live.ex
View file

@ -81,12 +81,13 @@ defmodule MicrowavepropWeb.AboutLive do
</li>
</ol>
<p>
The scoring is a weighted sum of nine factors: humidity, time of
day, T–Td depression, refractivity gradient, sky cover, season, rain,
wind, pressure. The weights are band-dependent because the physics
changes as you go up: humidity helps at 10 GHz (more refractivity)
and hurts at 24+ GHz (absorption). Every coefficient is a hypothesis
I'm checking against the contact and beacon data.
The scoring is a weighted sum of ten factors: rain, humidity,
precipitable water (PWAT), season, refractivity gradient, pressure,
T–Td depression, sky cover, wind, and time of day. Weights were
calibrated via gradient descent against 5,000 QSOs. The physics
changes by frequency: humidity helps at 10 GHz (more refractivity)
and hurts at 24+ GHz (absorption). Refractivity now uses native
HRRR hybrid-sigma levels (10–50 m resolution) for duct detection.
</p>
</div>