> I was wondering if there was a convention about the sign of the equation > of time. Waugh describes 'dial fast' and 'dial slow' but doesn't have a > sign. His graph looks negative in February. I want to make a graph that > is positive in February and negative in November and I want to label it as > such so that users can simple look up the value to apply to LAT to get > LMT.
There is a convention about the sign of the eqt. It was adopted by IAU (International Astronomical Union) in 1930. The astronomers treated the eqt. as the instrumental correction to obtain true time from mean time indicated by clocks (i.e. measured by instruments). See eg. Explanatory Supplement to the Astronomical Ephemeris, Her Majesty's Stationery Office, London 1961, p. 890. Best regards Krzysztof Kotynia (51.8 N, 19.4E)
