C99 API

Added

• novas_fetch_eop() -- to obtain cubic spline interpolated EOP from IERS for given Julian Date.
• novas_fetch_eop_unix() -- to obtain cubic spline interpolated EOP from IERS for a given UNIX time.
• novas_set_eop_url() / novas_get_eop_url() -- to use alternative (e.g. mirrored) URLs for the IERS EOP or leap seconds series, or to check what URLs are currently configured.
• novas_get_eop_itrf_year() -- to retrieve the ITRF realization year associated with a given EOP data series.
• novas_reset_eop() -- to free up resources used for obtaining EOP data from IERS.
• novas_set_auto_fetch_eop() and novas_is_auto_fetch_eop() -- To control and check whether automatic fetching of EOP values and leap seconds from IERS is allowed if needed.
• novas_set_leap_list() -- to use a local leap-seconds.list data file (at least until its expiry).
• novas_leap_lookup() -- to look up leap seconds for a given UNIX time.

Changed

• novas_set_time() and related functions, and novas_make_frame() changed to fetch EOP values from IERS if the arguments for these are NAN and fetching is allowed.

C++11 API

Added

• EOP::fetch_for_jd(), EOP::fetch_for_mjd(), EOP::fetch_for(), and EOP::fetch_current() methods.

Changed

• Time constructors will fetch EOP as needed (if allowed) if dUT1 is undefined (NAN), and the EOP parameter is now optional as a result.
• EOP values to GeodeticObserver are now optional, and invalid EOP does not invalidate the observer so long as automatic fetching of EOP is allowed.
• Frame will fetch polar offsets from IERS if the geodetic observer does not provide these, and fetching is allowed.