A quick update - 2nd day 1st

Half way through the second day.  I'll update on the 1st day later.  With a mind distorted by jet lag and failing co-ordination, typing a sentient sentence was far too challenging.  The morning has concentrated on the aspects of light pollution that are variables of spectral attributes.  Covering aerosols, photometry, lamps, aerosol optical depth.  Some great results derived from the DMSP, ISS and other satellite data, mobile SQMs and mobile spectrometers.