1. Mick West

    Calculator for RHi and Contrail Persistence Criteria

    . I've started on a calculator to convert RHw (relative humidity with respect to water) to RHi (relative humidity with respect to ice). Currently it just takes RHw, temperature and pressure, and then gives you the RHi, and the value of RHw at which RHi is 100% (i.e...
  2. Trailblazer

    Contrails versus humidity: a timelapse project

    This is something I've been meaning to do for a while: a daily record of the contrails (or lack of contrails) in the sky, in a known location, compared to a daily record of the atmospheric conditions in that location, specifically the relative humidity at typical aircraft cruising height. I'm...