Razel
New member
- Joined
- Dec 29, 2003
- Location
- Fremont
- Moto(s)
- BMW '10 K1300GT, BMW '03 K1200GT (for sale), '07 X-Challenge
- Name
- Ray
- BARF perks
- BARF CAL 24 rider
According to the code, the time is based on USNO for Los Altos. Nowhere can I find the phrase "sunset begins".According to the US Naval Observatory for today, sunset (begins) at 17:51 and end of civil twilight is at 18:18. Nautical twilight is 18:45, astronomical 19:15. (Civil twilight = sun is 6 degrees below horizon; naut. = 12 deg, astron. = 18 deg. These don't account for terrain and such though, i.e. sunset as perceived.)
Thanks!
- Sai
805.3 After Official Hours Use Prohibited. No person shall enter or remain on District Lands after “Official Hours,” which are defined as the period of one-half hour after official Sunset to one-half hour before official Sunrise the following day without a written permit. The times for Sunrise and Sunset shall be determined by the U.S. Naval Observatory’s official postings for Los Altos, California.
U.S. Naval Observatory
Astronomical Applications Department
Sun and Moon Data for One Day
The following information is provided for Los Altos, Santa Clara County, California (longitude W122.1, latitude N37.4):
Wednesday
20 February 2008 Pacific Standard Time
SUN
Begin civil twilight 6:26 a.m.
Sunrise 6:52 a.m.
Sun transit 12:22 p.m.
Sunset 5:53 p.m.
End civil twilight 6:19 p.m.
MOON
Moonrise 4:37 p.m. on preceding day
Moon transit 11:44 p.m. on preceding day
Moonset 6:39 a.m.
Moonrise 5:45 p.m.
Moonset 7:05 a.m. on following day
Full Moon on 20 February 2008 at 7:31 p.m. Pacific Standard Time.
I think you'll need some official source that says sunset is not a moment in time, but spans a period of time between "17:51" and "X" for the day you were cited. 805.3 appears to be written based on the format and information the USNO provided the times with.





