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Length: 1225 (0x4c9)
Types: TextFile
Names: »Fbob:sun«
└─⟦87ddcff64⟧ Bits:30001253 CPHDIST85 Tape, 1985 Autumn Conference Copenhagen
└─⟦this⟧ »cph85dist/astro/sun/Fbob:sun«
From uucp Fri May 24 22:30:40 1985 >From tektronix!reed!nsc-pdc!rgb Fri May 24 20:02:13 1985 remote from ihnp4 From: ihnp4!tektronix!reed!nsc-pdc!rgb Received: by ihnp4.ATT.UUCP id AA24414; 24 May 85 20:02:13 CDT (Fri) To: reed!tektronix!ihnp4!hpfcla!ajs Received: from reed.uucp by tektronix ; 24 May 85 13:04:13 PDT Received: by reed.UUCP (4.12/1.0), id AA21666; Fri, 24 May 85 13:00:54 pdt Received: by nsc-pdc.UUCP (4.12/4.7), id AA19161; Fri, 24 May 85 11:14:20 pdt Date: Fri, 24 May 85 11:14:20 pdt Message-Id: <8505241814.AA19161@nsc-pdc.UUCP> Subject: Re: sun(1) Status: R The program calculates some corrections for sunset and sunrise positions based on the refraction of the air, parallax, and one other thing I forget now. The postion figures don't do the correction: I wimped out because the refraction correction is a function of the height of the sun above the horizon. The sunrise and sunset are apparent times, you should remove the dt correction to find the "astronomical" times. Try the first day of spring at dawn to see what I mean. The sun should come up almost exactly in the east, but it's apparent position is different because of the corrections. I hope this is understandable... Bob