John Carmichael wrote to Ciao (to Gianni Ferrari I think :-) ) : > Dear Ciao : > > Love your simple, to-the-point definitions. Does the word "True" in your > definitions mean "apparent" or "solar"? > > John Carmichael > ---------------------------------------------------
>From what I have been able to find, the authors in USA use the expression "Apparent Time" to define the Sun's local hour angle . This definition for example you can find in the "Explanatory Supplement to the Astronomical Almanac", in the volume of Mayall and in other texts on positional astronomy . The Italian and European astronomers on the contrary use, for defining the same angle, the expression "True Time" . This definition can be found , for ex., in the volumes of J. Meeus, of Rhor and.... in mine. The two expressions have therefore the same meaning. A regard Gianni P.S. My name is not, obviously, Ciao ( = hi ,hallo , bye ) but Gianni and the surname Ferrari :-) :-) --------------------------------------------------------------------------- Ing.Gianni Ferrari Via Valdrighi, 135 41100 - MODENA (ITALY) EMail : [EMAIL PROTECTED] http://members.tripod.com/meridiane/index.htm ---------------------------------------------------------------------------
