|News on Websurf:|
- 2010 January 13
- Many changes have been made to the various programs including the
implementation of the Sun, Moon and all planets for Rise_Set, Alt_Az,
Az_at_Alt and Alt_at_Az options. Depression and Altitude options for Rise_Set
and Az_at_Alt now work correctly. Crown Copyright statements have been included
throughout the site. The INFO option now directs users to the relevant web
sites and pages. Cosmetic changes have also been made to the codes.
- 2004 February 17
- Changes have been made to the pages that implement location searching
following comments from users that they were not clear. Efforts have been
made to make it clear that one of the four options in the place search
page should be used. A bug which allowed BST to be implemented for locations
outside the UK has been corrected.
- 2003 May 14
- A typographic error in the Alt_Az option has been found in the course of
generating data for the Lunar eclipse on 2003 May 16. This typo caused errors
in the computed altitudes of the Moon and has now been corrected. A small
change in the refraction implemetation has also been made in the Almanac
option. Refraction is applied in such a way as to provide altitudes compatible
with the Rise_Set output.
- 2003 April 10
- The PostScript file naming bug has been resolved in the Download Data
option. PDF output can now be generated as well as PostScript output. The
suggested filename will be the program option plus an extension of either
.pdf or .ps. For instance, if you are running Rise_Set, the output file
will either be Rise_Set.pdf or Rise_Set.ps.
- 2003 April 1
- Websurf released. There may be problems in the naming of PostScript files
when data are saved using the Download Data option. The files may be named
runsurf.cgi but they are PostScript files not cgi programs. This cause of this
bug is being investigated.
- 2003 March 31
- Almanac option released. This option provides topocentric solar, lunar and
planetary data for a specified location at a given date and time. It uses local
standard time for input but does not include a summer time or daylight saving
time option. Any date between 1600 January 1 and 2200 December 31 can be
- 2003 March 7
- Equ_&_Sol option released. This option provides the date and time of the
Equinoxes and Solstices for a particular year. A time zone can be specified to
generate the data in local standard time. No correction is made for summer
time or daylight saving time. Any date between 1600 January 1 and 2200 December
31 can be entered.
- 2003 March 7
- Moon_Phase option released. This option provides the next four Moon phases
aftera specified date or the phases for the full year if only the year is
specified. A time zone can be specified to generate the data in local standard
time. No correction is made for summer time or daylight saving time. Any date
between 1600 January 1 and 2200 December 31 can be entered.
- 2003 February 19
- UK Postcode option released. The location for which data are required can
now be specified using a UK postcode.
- 2003 February 19
- Existing fortran software has been upgraded to use the Jet Propulsion
Laboratory's DE405 ephemeris. This will provide data for a period of 600 years.
- 2003 January 6
- Updates being implemented to update the existing Websurf service designed
for use on the Web by David Harper. The underlying software is fortran code
used for many years by the Public Information Unit of the Royal Greenwich