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Earthshine blog

"Earthshine blog"

A blog about a telescopic system at the Mauna Loa Observatory on Hawaii to determine terrestrial albedo by earthshine observations. Feasible thanks to sheer determination.

EFM software rewritten to Fortran.

Post-Obs scattered-light rem. Posted on May 15, 2012 10:33

Update:Thanks to help from Rong Fu it now seems we have a working Fortran 90 code for the EFM Method! The code is being tested against synthetic test cases and a performance report will be written. The code will be set up to run on the DMI Cray and with it we will be able to process much of the observations we have accumulated, and improve the paper significantly.The point of the new code is that it is no longer written in C (which is a bit of a mystery to us old-timers) and can now more easily be experimented with and optimized.

JD2456062/3 – weather log

Observing log Posted on May 15, 2012 10:31

at ..62.8 clear, 3 deg C, 2 m/s from 250 deg. RH ..63.11 T lower, still clear, low wind, RH 60%This is a really strange night – the relative exposure times are very unusual.The factors are:B 20V 22VE1 20VE2 18IRCUT 20Especially B is very strange indeed.A lot of shutter hang going on, though.